REVIEW NAUČNIH I STRUČNIH rezultata 2017.pdf · review of research and business results of the ims institute in 2017 pregled nauČnih i struČnih rezultata instituta ims u 2017

REVIEW

OF RESEARCH

AND BUSINESS RESULTS

OF THE IMS INSTITUTE

IN 2017

PREGLED

NAUČNIH I STRUČNIH

REZULTATA

INSTITUTA IMS

U 2017. GODINI

Institut za ispitivanje materijala a.d.

Beograd, decembar 2017.

PREGLED NAUČNIH I STRUČNIH REZULTATA

INSTITUTA IMS U 2017. GODINI

REVIEW OF RESEARCH AND BUSINESS RESULTS

OF THE IMS INSTITUTE IN 2017

Izdavač

Institut IMS a.d.

Beograd, Bulevar vojvode Mišića 43

[email protected]

www.institutims.rs

Za izdavača

Dr Vencislav Grabulov

Urednici


Dr Aleksandra Mitrović

Goran Petrović

Štampa

Razvojno-istraživački centar grafičkog inženjerstva

Tehnološko-metalurški fakultet, Beograd, Karnegijeva 4

Tiraž

300 primeraka

ISBN 978-86-82081-27-2

Institut IMS u ovoj godini obeležava 65 godina od osnivanja u današnjem

obliku. Iz svoje bogate istorije navodimo i jubilej navršenih 60 godina primene

prefabrikovanog prednapregnutog skeletnog sistema u zgradarstvu.

Institut za ispitivanje materijala je i ove, veoma uspešne godine, učestvovao u

najznačajnijim projektima u zemlji i regionu. U skladu sa višedecenijskom

tradicijom i ugledom, kao i širokim spektrom usluga koje pružamo, bili smo

angažovani na kontroli i nadzoru, projektovanju, ispitivanjima i istraživanjima

građevinskih i mašinskih objekata i konstrukcija, materijala i proizvoda, na

geotehničkim istražnim radovima, kao i primeni različitih tehnologija i sistema

razvijenih u Institutu IMS.

Kao najznačajnije, izdvajamo nastavak rada na koridorima X i XI, na obnovi i

izgradnji putnih objekata duž autoputeva i magistralnih i regionalnih puteva u

Srbiji, na revitalizaciji HE Đerdap 1 u Kostolcu i na drugim hidro i termo-

elektranama, sanaciju brojnih klizišta, primenu sistema prednaprezanja i druge

specijalističke inženjerske usluge.

Nastavljeno je učešće naših saradnika na realizaciji sedam projekata

tehnološkog razvoja, jedog projekta integralnih i interdisciplinarnih

istraživanja i četiri projekta iz programa osnovnih istraživanja.

I ove godine Institut IMS može da se pohvali rastom broja istraživača izabranih

u naučna zvanja i doktorskim disertacijama koje su odbranile naše mlade

kolege. Priloženi pregled apstrakata svedoči o održanom kontinuitetu

objavljivanja naučnih radova na uglednim skupovima i u istaknutim

publikacijama.

Urednici

Pregled naučnih i stručnih rezultata u 2017. godini 1

SADRŽAJ

REZULTATI NAUČNO-ISTRAŽIVAČKOG RADA .................................. 5

T 152 KOMPOZITNI MATERIJALI ............................................................... 7

Tematski zbornik vodećeg međunarodnog značaja (M13) .................................. 8

Rad u vrhunskom međunarodnom časopisu izuzetnih vrednosti (M21A) ........ 10

Rad u istaknutom međunarodnom časopisu (M22) ........................................... 15

Rad u međunarodnom časopisu (M23).............................................................. 19

Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 20

Saopštenje sa međunarodnog skupa štampano u izvodu (M34) ........................ 27

Saopštenje sa skupa nacionalnog značaja štampano u celini (M63) ................. 28

T 153 KERAMIČKI I PRAŠKASTI MATERIJALI ....................................... 29

Rad u časopisu međunarodnog značaja verifikovanog posebnom odlukom

(M24) ................................................................................................................. 30


T 210 MAŠINSTVO, HIDRAULIKA, VAKUUMSKA TEHNOLOGIJA I

AKUSTIČKI INŽENJERING .......................................................................... 35


(M24) ................................................................................................................. 36


Rad u vodećem časopisu nacionalnog značaja (M51) ....................................... 42

2 Institut za ispitivanje materijala a.d. Beograd

T 220 GRAĐEVINARSTVO, HIDRAULIKA,

PRIOBALNA TEHNOLOGIJA, MEHANIKA TLA ....................................... 45


(M24) ................................................................................................................. 46


T 230 VISOKA GRADNJA ............................................................................. 55


(M24) ................................................................................................................. 56


T 270 TEHNOLOGIJA ŽIVOTNE SREDINE,

KONTROLA ZAGAĐIVANJA ........................................................................ 61

Rad u tematskom zborniku međunarodnog značaja (M14) ............................... 62



T350 HEMIJSKA TEHNOLOGIJA I INŽENJERING .................................... 67

Rad u vrhunskom međunarodnom časopisu izuzetnih vrednosti (M21A) ........ 68

Rad u istaknutom međunarodnom časopisu (M22) ........................................... 69



T450 TEHNOLOGIJA METALA, METALURGIJA,

PROIZVODI OD METALA ............................................................................. 73


(M24) ................................................................................................................. 74



Saopštenje sa međunarodnog skupa štampano u izvodu (M34) ........................ 79


T 002 GRAĐEVINSKA TEHNOLOGIJA ...................................................... 85


(M24) ................................................................................................................. 86


P420 PETROLOGIJA, MINERALOGIJA, GEOHEMIJA .............................. 89


Rad u vodećem časopisu nacionalnog značaja (M51) ....................................... 92

DOKTORSKE DISERTACIJE ......................................................................... 93

ORGANIZACIJA STRUČNIH SKUPOVA .................................................... 97

NAUČNI PROJEKTI FINANSIRANI OD STRANE MINISTARSTVA

PROSVETE, NAUKE I TEHNOLOŠKOG RAZVOJA ................................ 101

ODABRANE STRUČNE REFERENCE ................................................... 105

CENTAR ZA MATERIJALE ........................................................................ 107

CENTAR ZA METALE I ENERGETIKU ................................................... 113

CENTAR ZA PUTEVE I GEOTEHNIKU ................................................... 119

CENTAR ZA KONSTRUKCIJE I PREDNAPREZANJE ............................ 127

SERTIFIKACIONO TELO ............................................................................. 141

KONTROLNO TELO ..................................................................................... 143

PT PROVAJDER ............................................................................................ 147



RESULTS

OF SCIENTIFIC RESEARCH

WORK

REZULTATI

NAUČNO-ISTRAŽIVAČKOG

RADA



T 152

COMPOSITE

MATERIALS

T 152

KOMPOZITNI

MATERIJALI


TEMATSKI ZBORNIK VODEĆEG

MEĐUNARODNOG ZNAČAJA (M13)

B. Ilić, A. Mitrović, V. Radonjanin, M. Malešev, M. Zdujić

COMPRESSIVE STRENGTH IMPROVEMENTS OF CEMENT-BASED

COMPOSITES ACHIEVED WITH ADDITIONAL MILLING OF

METAKAOLIN

Calcined Clays for Sustainable Concrete. RILEM Bookseries, Vol. 16,

Springer, Dordrecht, 2017, 212-218.

Kaolin from a Serbian deposit, having a high content of mica and quartz,

disordered kaolinite and a high specific surface area, was used to prepare

metakaolin (MK). The calcination at temperatures of 700 °C or 750 °C for 30 to

180 min resulted in MK having high pozzolanic activity, but also significant

aglomeration of particles. In order to disperse aglomerates, MK was milled,

which resulted in increased pozzolanic activity and reduced particle size. The

effects of MK and additionally milled metakaolin (MKmill) on the composite

strengths and microstructure of the pastes were compared. We prepared and

investigated composites in which ordinary Portland cement (OPC) was replaced

with 10% to 50% of MK or MKmill, as well as the representative samples of

paste for determination of microstructure.

Compressive strengths higher than the control were obtained for composites

having up to 30% of MK and up to 40% of MKmill, respectively. Increase of

composite strengths with MKmill was more pronounced at lower cement

replacement levels (10% and 20%).

Compressive strength of composites containing agglomerated MK were

satisfactory, which suggests that milling of MK, as well as purification of

kaolin, may not be necessary.

Keywords: calcination, metakaolin, milling, cement-based composites.


B. Ilić, V. Radonjanin, M. Malešev, M. Zdujić, A. Mitrović

PROPERTIES OF THE CEMENT-BASED COMPOSITES WITH HIGH

CONTENT OF METAKAOLIN

Calcined Clays for Sustainable Concrete. RILEM Bookseries, Vol. 16,

Springer, Dordrecht, 2017, 219-225.

Environmental concerns and sustainable development require increased

replacement of cement. Most of previous studies have shown that the

compressive strength of cement-based composites is maximized with a 20%

content of metakaolin. We investigated composites prepared by replacing

ordinary Portland Cement (OPC) with 30 to 50% of metakaolin (MK) and

addition of appropriate amount of hydrated lime, which were ordinary cured for

2, 28 or 90 days. Hydration products and microstructure of the pastes were

determined by X-ray diffraction (XRD), differential thermal analysis/thermal

gravimetry (DTA/TG) and mercury intrusion porosimetry (MIP). MK was

produced by calcination of kaolin from a Serbian deposit, which contained a

high level of impurities.

Replacement of OPC with 30% of MK achieved 28 days compressive strength

equivalent to that of the control mix. Higher replacement levels, 40% and 50%,

combined with the addition of hydrated lime, achieved satisfactory relative

strengths of 94% and 87%, respectively. The positive contribution was

particularly pronounced after 90 days for a composite containing 50% of MK.

The results clearly showed a possibility of obtaining composites having

acceptable compressive strength with reduced cement content in accordance

with environmental and sustained development requirements.

Keywords: metakaolin, hydrated lime, cement-based composites, compressive

strength.


RAD U VRHUNSKOM MEĐUNARODNOM

ČASOPISU IZUZETNIH VREDNOSTI (M21A)

B. Ilić, V. Radonjanin, M. Malešev, M. Zdujić, A. Mitrović

STUDY ON THE ADDITION EFFECT OF METAKAOLIN

AND MECHANICALLY ACTIVATED KAOLIN ON CEMENT

STRENGTH AND MICROSTRUCTURE UNDER DIFFERENT

CURING CONDITIONS

Construction and Building Materials, 133, 2017, 243-252.

The effects of thermally (MK) or mechanically activated kaolin (AK) on the

compressive strength of mortars and microstructure of pastes were investigated.

Mortar mixtures, in which 10%, 20% and 30% of ordinary Portland cement

(OPC) was replaced by either MK or AK, were prepared (w/b of 0.5) and

ordinary (age 2, 28 or 90 days) and autoclave cured. Hydration products were

determined by X-ray diffraction (XRD) and differential thermal

analysis/thermal gravimetry (DTA/TG) analysis, while microstructure was

investigated by mercury intrusion porosimetry (MIP).

MK substitution increases the compressive strength of ordinary-cured mortars,

as a result of the higher content of reactive silica that caused more pronounced

pozzolanic reaction, as well as by effective refinement of their pore structure.

Positive effects on the compressive strength could be achieved up to 30%

substitution of OPC by MK. The OPC substitution by AK resulted in lower

strengths of ordinary-cured mortars, compared to both MK mortars and

reference. Higher specific surface area and finer particles of AK were

insufficient to compensate, through filler effect, lower pozzolanic reaction and

additional negative influence of the kaolinite presence. The highest compressive

strength was obtained for mortar with 10% of AK (relative strength of 94%).

In comparison to the reference, autoclaved MK and AK mortars, exhibited

lower compressive strength, as a consequence of increasing the hydrogarnet

formation, instead of tobermorite. The highest strength was achieved for mortar

with 10% of AK.

Keywords: metakaolin, amorphous kaolin, ordinary curing, autoclave curing.



ČASOPISU (M21)

A. Terzić, D. Radulović, L. Pezo, Lj. Andrić, Lj. Miličić, J. Stojanović, I.

Grigorova

THE EFFECT OF MECHANO-CHEMICAL ACTIVATION

AND SURFACE TREATMENT OF LIMESTONE FILLER

ON THE PROPERTIES OF CONSTRUCTION COMPOSITES

Part B: Composites, No. 117, 2017, 61-73.

The effect of the combined actions of milling and hydrophobization procedures

applied in construction composites synthesis was investigated. The mortars

were prepared with cement (CEM I 42.5) and calcite aggregate complying the

standard 1:3 mix ratio. The limestone filler (10 wt.%) was added to the mixture

upon its mechano-chemical activation in an ultra-centrifugal mill. The

activation variables (milling time, rotor velocity, sieve mesh size) were altered

to achieve the optimal quality of the powder. The treatment was optimized via

chemometric tools. The r2 values (0.955-0.998) of second order polynomial

models accurately predicted the output. Standard score analysis chose the

optimal activation parameters: 4.25 min; 48.58 m/s and 80 μm sieve. The

selected filler and all three aggregate fractions were coated with stearic acid via

dry procedure. The mortar mixes, prepared with uncoated (M1) and coated

(M2) aggregate and filler, were cured for a period of 28 days during which

compressive strength and water absorption were monitored. The dimensional

changes in mortars were estimated via TMA dilatometer measurement. Thermo-

analytical methods (DTA/TGA) were applied in the thermal behavior analysis.

Mineralogical and morphological changes in the structure of hardened

composite were detected by XRD and SEM, respectively. Limestone aggregate

led to lower final compressive strengths in mortar, but it produced an

acid initiated the decrease in water absorption and formation of needle-like

micro-network that filled structural voids reducing the open porosity. The

assessment of the effects of limestone utilization as a filler and as an aggregate

on the mortar performances confirmed that this novel water-repellent composite

is applicable in the structural design.


Keywords: strength, statistical methods/modeling, thermal analysis, electron

microscopy, powder processing.

A. Terzić, L. Pezo, Lj. Andrić

CHEMOMETRIC ASSESSMENT OF MECHANO-CHEMICALLY

ACTIVATED ZEOLITES FOR APPLICATION IN THE

CONSTRUCTION COMPOSITES

Part B: Engineering, No. 109, 2017, 30-44.

Natural zeolites of clinoptilolite type from seven deposits were submitted to

mechano-chemical activation in a Retsch ultra-centrifugal mill. The zeolite

types and activation parameters were altered during the experiment with an aim

to determine the optimal combination that would produce powder with adequate

physico-chemical and microstructural properties for application as a binder

replacement and an ion-exchanger in the construction composites. The effects

of input variables (chemical composition of the samples) and process

parameters (the rotor velocity and the activation period) on the efficiency of

zeolite activation were investigated in terms of dependent parameters such as:

specific surface area, grain size distribution, cation exchange capacity, melting

point, compression strength, shrinking, water absorption and apparent porosity.

Cluster analysis, Principal component analysis and Standard score analysis were

applied in the assessment of the acquired product quality. Artificial neural

networks (ANN) were developed in mathematical modeling of observed

responses. Subsequently the ANN was compared to experimental results and the

developed second order polynomial models. Developed models showed r2

values in the 0.822-0.998 range, meaning that they were able to predict the

observed responses in a wide range of processing parameters. ANN models

performed high prediction accuracy (0.975–0.993) and can be considered as

precise and very useful for response variables prediction. The combination of

the conducted mathematical analyses isolated Z5 zeolite as a preferable type,

and 20000 rpm and 30 min as an optimal activation set of parameters.

Mathematically derived conclusions were confirmed by results of instrumental

analyses (XRD, DTA/TG, SEM).

Keywords: Mechanical properties, analytical modeling, thermal analysis,

powder processing, construction materials.


A. Terzić, L. Pezo, Lj. Andrić, V. Pavlović, V. Mitić

OPTIMIZATION OF BENTONITE CLAY MECHANO-CHEMICAL

ACTIVATION USING ARTIFICIAL NEURAL NETWORK MODELING

Ceramics International, Vol. 43, No. 2, 2017, 2549–2562.

The properties of seven montmorillonite-rich bentonites of different geological

origin were investigated prior and subsequent to mechano-chemical processing

in an ultra-centrifugal mill. The objective of the experiment was altering the

bentonite types and activation parameters in order to determine the optimal

milling conditions that produce material which is physico-mechanically and

microstructurally applicable as a binder replacement and sorbent in the

construction composites. The efficiency of bentonite activation was assessed by

chemometrics and Artificial neural networks mathematical modeling. Principal

component analysis and analysis of variance were used in the observation of the

influence of input variables (bentonite chemical composition) and process

parameters (milling duration, rotor velocity) on the product characteristics:

density, specific surface area, grain size and distribution, cation exchange

capacity, melting point, compressive strength, shrinkage and porosity. When the

ANN models for the observed responses, related to predicted bentonite

characteristics and quality, were compared to experimental results, they

correctly predicted the responses. The processed data also adequately fitted to

the regression second order polynomial models. The SOP models, which

showed r2 values from 0.357 to 0.948, and were able to predict the observed

responses in a wide range of processing parameters, while ANN models

performed high prediction accuracy (0.776–0.901) and can be considered as

precise for response variables prediction. The combination of the conducted

mathematical analyses showed that that increase/decrease in output values was

stabilized after 30 min of activation. Mathematically attained interpretations

were correlated with the results of the instrumental analyses (XRD, DTA/TG,

SEM) to confirm the adoption of B6 bentonite as a preferable type and 30 min

as an optimal milling time for acquiring quality of clay powder that will be used

in structural and thermal applications.

Keywords: Milling, composites, electron microscopy, chemical, mechanical

and thermal properties, clays, structural and thermal applications.


A. Terzić, N. Obradović, J. Stojanović, V. Pavlović, Lj. Andrić, D. Olćan, A.

Đorđević

INFLUENCE OF DIFFERENT BONDING AND FLUXING AGENTS ON

THE SINTERING BEHAVIOR AND DIELECTRIC PROPERTIES OF

STEATITE CERAMIC MATERIALS

Ceramics International, Vol. 43, No. 16, 2017, 13264-13275.

The focus of the study was on providing insights into interconnections between

sintering and development of the crystalline microstructure, and consequently

variations in dielectric behavior of four steatites fabricated from a low-cost raw

material, i.e. talc. The changes, induced by the alternations of the binders

(bentonite, kaolin clay) and fluxing agents (BaCO3, feldspar), were monitored

-

re-crystallization of the investigated structures were accomplished. The critical

points in the synthesis of steatite materials were assessed by instrumental

analyses. Crystallinity changes and mineral phase transition during sintering

were monitored by X-ray diffraction technique. Microstructural visualization of

the samples and the spatial arrangements of individual chemical elements were

achieved via scanning electron microscopy accompanied with EDS mapping.

The thermal stability was observed on the green mixtures using differential

thermal and thermo gravimetric analyses. Electrical measurements recorded

variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of

the sintering temperature. The investigation highlighted critical design points, as

well as the optimal combinations of the raw materials for production of the

steatite ceramics for advanced electrical engineering applications.

Keywords: sintering, electron microscopy, x-ray methods, microstructure-final,

dielectric properties, mgo; insulators.


RAD U ISTAKNUTOM MEĐUNARODNOM

ČASOPISU (M22)

A. Terzić, N. Đorđević, M. Mitrić, S. Marković, K. Đorđević, V. Pavlović

SINTERING OF FLY ASH BASED COMPOSITES WITH ZEOLITE

AND BENTONITE ADDITION FOR APPLICATION IN

CONSTRUCTION MATERIALS

Science of Sintering, Vol. 49, No. 1, 2017, 23-37.

Due to pozzolanic characteristics, fly ash is commonly used as a cement

replacement in construction composites. Addition of natural clays with sorption

ability (i.e. zeolite and bentonite) in to the fly ash based construction materials

is of both scientific and industrial interest. Namely, due to the application of

sorptive clay minerals, it is possible to immobilize toxic heavy metals from the

composite structure. The thermal compatibility of fly ash and zeolite, as well as

fly ash and bentonite, within the composite was observed during sintering

procedure. The starting components were used in 1:1 ratio and they were

applied without additional mechanical treatment. The used compaction pressure

for the tablets was 2 t·cm-2. The sintering process was conducted at 1000ºC and

1200ºC for two hours in the air atmosphere. The mineralogical phase

composition of the non-treated and sintered samples was analyzed using X-ray

diffraction method. Scanning electron microscopy was applied in the analysis of

the microstructure of starting and sintered samples. The thermal behavior was

observed via DTA method. The influence of temperature on the properties of fly

ash-zeolite and fly ash-bentonite composites was investigated.

Keywords: sintering, thermal behavior, density, dta, xrd, sem, construction

composite.


D. Radulović, A. Terzić, L. Pezo, Lj. Andrić, I. Grigorova

THE CHEMOMETRIC STUDY OF LIMESTONE PHYSICO-

CHEMICAL PROPERTIES AND THERMAL BEHAVIOR FOR

APPLICATION IN CONSTRUCTION COMPOSITES

Science of Sintering, Vol. 49, No. 3, 2017, 247-261.

The limestone, as an economically sustainable and easily available basic raw

material, is frequently utilized in the building industry for resolving of the

environmental protection issues. The limestone is incorporated in a

cementitious system either by grinding with cement clinker, or by blending with

the binder during concrete production. The employing of powdery limestone as

partial cement replacement gives the construction composites with properties

comparable to that of conventional concrete. The study of limestone thermal

behavior and its chemistry is crucial for the prognosis of the designed

composites properties. In this work, the instrumental techniques (atomic

emission spectroscopy, differential thermal and thermo-gravimetric analysis,

Fourier transform infrared spectroscopy) and the Principal component analysis

were employed to discriminate and classify 22 limestone types. The PCA

statistical method, as a means of spectra and experimental data fingerprinting,

grouped the samples in a multi-dimensional factor space producing four

graphical prognosis - one for each instrumental method. DTA/TG peak values

varied the most in a short range between 830-870 °C, while FTIR spectra

showed the highest diversity in the 867-887 cm-1 and 1237-1647 cm-1 ranges.

This research was governed by an idea to reveal whether it is possible to

differentiate various limestone types and to predict the possibility of their

employment in construction composites on the basis of the results of

instrumental and mathematical analyses.

Keywords: thermal behavior, chemical analysis, microstructure, FTIR,

DTA/TG, SEM, binder, filler.


D. Radulović, D. Božović, A. Terzić, M. Trumić, V. Simić, Lj. Andrić

A KINETIC STUDY OF LIMESTONE DRY MICRONIZATION IN

ULTRA-CENTRIFUGAL MILL WITH PERIPHERAL COMMINUTING

PATH

Journal of Ceramic Science and Technology, Vol. 8, No. 2, 2017, 295-304.

Fine grinded (i.e. micronized) limestone has a wide application in the

production of the new materials, due to its physico-mechanical and physico-

chemical characteristics. The limestone can be used as a filler, coating and/or

powder in ceramic composites. The effect of the fine micronization depends on

the type of the applied equipment and also on the disintegration process. The

emphasis in this study was placed on the investigation of the kinetics of

limestone dry micronization milling in an ultra-centrifugal mill, of an advanced

construction, with a peripheral comminuting path. The efficiency of the used

ultra-centrifugal mill with a peripheral comminuting path was determined

through a detailed investigation of the limestone dry micronization, which

satisfied all of the requirements for technological parameters as well as all

requests regarding micronized product parameters. On the basis of the

investigation of these parameters and theory of dry micronization conducted in

a mill of advanced construction and with use of the contemporary instrumental

techniques for determination and observation of the most significant physical

and chemical characteristics, the kinetics model was produced to serve as the

basis for quick and effective determination of the micronization quality and

efficiency. In this paper, the results of the grinding in an ultra-centrifugal mill

Retsch ZM-1 were analyzed in order to optimize and automatize the process of

ultra-fine micronization.

Keywords: limestone, fillers for ceramics, mechano-chemical activation,

grinding, optimization.


M. Cocić, B. Matović, M. Pošarac, T. Volkov-Husović, J. Majstorović, V. Tasić,

S. Dević, N. Vušović

THERMAL SHOCK PROPERTIES OF GLASS-CERAMICS

SYNTHESIZED FROM A GLASS FRIT

Science of Sintering, 49, 2, 2017, 139-147.

In this study, the behavior of glass-ceramics synthesized from a glass frit of

FFW (Final Flotation Waste) originated from the RTB Bor Company was

investigated. Thermal shock resistance was monitored in order to assess the

possibility of application of such waste material. Thermal shock of the samples

was conducted using water quench test. Image analysis and ultrasonic

measurements were used as nondestructive methods for quantification of

thermal shock damage at the surface and in the bulk of the specimens. Phase

composition of samples was determined by X-ray powder diffraction (XRPD).

The degradation level of samples was about 43 % after 20 cycles of water

quench tests. The results pointed out that glass-ceramic material exhibited good

thermal shock resistance.

Keywords: final flotation waste(FFW), glass-ceramic, thermal shock, image

analysis, ultrasonic velocity.


RAD U MEĐUNARODNOM ČASOPISU (M23)

K. Janković, N. Šušić, M. Stojanović, D. Bojović, Lj. Lončar

THE INFLUENCE OF TAILINGS AND CEMENT TYPE ON

DURABILITY PROPERTIES OF SELF-COMPACTING CONCRETE

Technical Gazette, Vol. 24, No. 3, 2017, 957-962.

In order to examine the differences in chemical composition and the possibility

of using mine tailings in mortar and concrete production, samples were taken

from the landfill and directly from the production. Tailings test results showed

no pozzolanic activity and that its application in concrete can be only a partial

replacement of aggregate. This paper presents the possibility of using tailings in

self-compacting concrete made with Portland cement and sulphate resistant

cement. Concrete specimens in which the aggregate fraction 0/4 mm was

replaced with 10 and 20 % of tailings were examined. The resistance to freezing

and thawing with and without de-icing salts is used as an indicator of concrete

durability.

Keywords: CEM I, CEM III, durability, self-compacting concrete, tailings.


SAOPŠTENJE SA MEĐUNARODNOG SKUPA

ŠTAMPANO U CELINI (M33)

D. Bojović, Lj. Lončar, K. Janković, M. Stojanović

ASSESSMENT OF CONCRETE COMPRESSIVE STRENGTH BY

CONVENTIONAL AND SOFT PROGRAMMING TECHNIQUES

XLIV Symposium on operational research SYM-OP-IS 2017, Zlatibor, 2017,

604-608.

Assessment of concrete compressive strength is an important issues in ready-

mixed concrete industry, especially in proportioning new mixtures and for

quality assurance of the produced concrete. Many parameters influence on

concrete strength in hardened state. The concrete characteristics that have a

significant impact on the strength of concrete is definitely air content. Measure

the porosity of fresh concrete is measured by the amount of entrained air. The

effect of entrained air in concrete on compressive strength investigated by many

authors. On the bases these works we have few equations applicable in practice.

Soft programming techniques especially neural networks and the formation of

databases related to the testing in laboratories for concrete opened up new

approaches in predicting the impact of the quantity of entrained air in concrete

on compressive strength. Neural networks provide a strength assessment by

considering several characteristics of both fresh and hardened concrete.

Keywords: assessment of concrete strength, neural networks, porosity.

I. Despotović, K. Janković

INFLUENCE OF DIFFERENT MINERAL ADDITIVES AND

RECYCLED CONCRETE AGGREGATES ON THE PROPERTIES OF

SELF-COMPACTING CONCRETE IN THE FRESH STATE

2nd International RILEM/COST Conference on Early Age Cracking and

Serviceability in Cement-based Materials and Structures EAC-02, Brussels,

Belgium, 2017, 399-403.

Construction industry uses vast amounts of natural resources, simultaneously

producing significant amounts of construction waste, so that it has a great


impact on the environment. Self-compacting concrete contains a certain

amount of powdered materials – fillers. There are various possibilities of

selecting this component. If we used any of the industrial by-products, such as

fly ash or silica fume, we would solve the problem of depositing these

materials, and thus made concrete ecological material. The research subject

presented in this paper are the properties and technology of self-compacting

concrete in the fresh state, made with various mineral additives: lime, fly ash,

and silica fume, wherein the aggregates used, are both natural and recycled

aggregates, obtained by demolition of retaining wall, whose amount is varied in

the concrete.

Keywords: self-compacting concrete, recycled aggregate, fly ash, silica fume,

lime.

K Janković, M.Stojanović, Lj. Lončar, D. Bojović, Lj. Miličić

INFLUENCE AND THE POSSIBILITY OF TAILINGS FROM THE

COPPER MINE RADOVIŠ ON THE PROPERTIES OF SCC

CONCRETE

17th International symposium of MASE, Ohrid, Macedonia, 2017, 710-714.

Tailings that pose a threat to the environment are created during the flotation of

ore from the mines. Samples were taken from the tailings from the copper mine

Rudovis in Macedonia. The testing of the chemical composition was performed,

as well as the possibility of application in the production of concrete. Testing

has shown that tailings have no pozzolanic properties. Physical - mechanical

properties were examined on the samples of self-compacting concrete prepared

with the addition of tailings, as a partial replacement of the fraction 0/4mm (in

quantity of 10 or 20%). Based on the obtained results it can be concluded that

the application of up to 20% of the tailings as a substitute for the fine fraction of

aggregates is justified.

Keywords: tailing, self-compacting concrete, compressive strength.


K. Đoković, S. Tošović, K. Janković, M. Stojanović

DETERMINING THE DYNAMIC MODULUS OF ELASTICITY OF

CEMENT STABILIZED MIXTURES FOR THE NEEDS OF THE

DESIGN OF THE PAVEMENT STRUCTURE

27th international symposium on research and application of contemporary

achievements in construction materials and structures, Vršac, 2017, 115-120.

Due to the nature of the dynamic loading of the pavement structure it is of

particular importance to determine the dynamic modulus of elasticity. In

addition to being used in designing a pavement structure, a dynamic modulus of

elasticity can also be used for the classification of stabilized mixtures. This

parameter can be obtained on the basis of the empirical dependence between the

modulus of elasticity and the compressive strength at 28 days and the

measurement of the ultrasound method. The paper presents the results of testing

the dynamic modulus of elasticity with cement of stabilized mixtures prepared

with different part of recycled asphalt and crushed stone aggregate. Also, the

tests were performed with a different percentage of cement 3, 5 and 7%

compared to the dry mass of the material.

Keywords: cement stabilization, dynamic modulus of elasticity, ultrasound

method.

K. Janković, Lj. Lončar, L. Antić, D. Bojović, M. Stojanović

THE INFLUENCE OF THE METHOD OF ADJUSTMENT OF

CONCRETE SPECIMENS ON COMPRESSIVE STRENGTH

5th International Conference Contemporary Achievements in Civil Engineering

2017 Subotica, 2017, 461-465.

The samples for subsequent testing of compressive strength are obtained from

cores drilled from the elements made of hardened concrete by drilling. Samples

must meet the requirements of applicable standards in terms of dimensions and

tolerance, and are thus prepared by cutting and grinding or by applying a

leveling layer. Five series of samples (cylinders) whose ends were prepared in

various ways by grinding or capping by: sulfur, sulfur and quartz sand,

aluminous cement quick-setting mortar and epoxy adhesive were tested. Before


that, compressive strengths of the materials used for making leveling layers

were tested. Sample preparation by grinding is recommended.

Keywords: concrete cores, compressive strength, preparation of sample ends.

K. Janković, M. Stojanović , D. Bojović, Lj. Lončar, L. Antić

EFFECTS OF DIFFERENT TYPES OF AIR ENTRAINING

ADMIXTURES ON FREEZE/THAW RESISTANCE



Some concrete structures are often exposed to external influences in

exploitation. The effect of frost has significant influence on the durability of the

concrete structures as it can lead to the destruction of the structure of concrete.

Concrete exposed to cold must be protected by aerating. The protection is

achieved by adding chemical admixtures that entrain air into fresh concrete. The

design of concrete mixtures was carried out in accordance with the

recommendations of national and European norms (w/c ≤ 0.45, minimum

strength class C 30/37, cement content ≥ 340 kg/m3, minimum content of

entrained air - 4.0%). Three concrete mixtures with various types of air

entraining were made. Frost resistance testing was performed according to

SRPS U.M1.016. The total number of freezing and thawing cycles was 250.

Keywords: concrete durability, air entraining admixture, freeze/thaw resistance.


INFLUENCE OF STEEL FIBER ON PROPERTIES OF HIGH

STRENGTH CONCRETE

5th International Congress Engineering, Environment and Materials in

Processing Industry, Jahorina, BiH, 2017, 564-573.

The development of modern chemical and mineral admixtures over the past two

decades has enabled the development of composites with very high mechanical

properties. By adding steel fibers to concrete a very ductile composite material

is obtained. Three types of high strength concrete by adding 0, 2 and 4% of steel

fibers were prepared. Properties of concrete: compressive strength, splitting


tensile strength and flextural strength were tested. In this study, the best

properties of high strength concrete with the application of 4% of steel fibers

were obtained.

Keywords: hpc, steel fibers, compressive strength and tensile strength.


THE EFFECT OF DIFFERENT AIR ENTRAINING ADMIXTURES ON

FREEZE-THAW SCALING RESISTANCE OF CONCRETE

2nd International RILEM/COST Conference on Early Age Cracking and

Serviceability in Cement-based Materials and Structures EAC-02, Brussels,

Belgium, 2017, 547-552.

In order to obtain concrete resistant to frost and/or frost and de-icing salts it is

necessary to use air entraining admixtures. The application of this type of

admixtures affects the concrete structure, as well as the other properties of

concrete. To determine the effect of different types of air entraining admixtures,

four concrete mixtures were prepared including: reference concrete and three

with added air entraining admixtures. The results of testing the properties of

fresh concrete as well as mechanical and physical properties of hardened

concrete (strength, bulk density, resistance of concrete to frost or de-icing salts,

pore spacing factor) were compared.

Keywords: air entraining admixtures, frost and salt, spacing factor


THE INFLUENCE OF AIR ENTRAINING ADMIXTURES ON

CONCRETE PROPERTIES

5th International Conference Contemporary Achievements in Civil Engineering

2017, Subotica, 2017, 467-472.

Concrete exposed to frost and de-icing salts have to be protected by aeration.

This is achieved by adding chemical additives to draw air into the fresh

concrete. These concretes have resulted in a decrease of compressive strength of

concrete by 5% for each percent of entrained air in comparison to the

conventional concrete. Three concrete mixtures with different types of air


entraining admixtures was done were made. A testing of properties of fresh

concrete and the influence of different types of air entraining admixtures to

fresh concrete was conducted. The results obtained in the fresh concrete as well

as the compressive strength at the age of 3, 7 and 28 days are shown.

Keywords: air entraining admixtures, fresh concrete, compressive strength.

K. Janković, M. Stojanović, Lj. Lončar, D. Bojović, Lj. Miličić

INFLUENCE OF THE WASTE FROM THE PROCESS OF STEEL

ALLOYING AS A PARTIAL REPLACEMENT OF AGGREGATE ON

CONCRETE PROPERTIES

17th International symposium of MASE, Ohrid, Macedonia, 2017, 715-720.

In the metallurgical industry, in the production of various alloys of steel, waste

material that has no further application is produced. Samples from the waste

dumps from the Skopski Leguri – Skopje, Macedonia were taken. Testing of

chemical composition, as well as the possibility of the application of waste

material obtained during alloying of metals in the production of concrete, was

performed. Studies have shown that the waste material has no pozzolanic

properties. For this reason, this material cannot be used as a partial replacement

for cement. On the concrete samples prepared with the addition of tailings, as a

partial replacement of the fraction 0/4mm (in the amount of 10 or 20%),

physical - mechanical properties were examined. Based on the obtained results,

it can be concluded that the application of up to 10% of the waste material is

justified.

Keywords: waste from the steel alloying process, aggregate, concrete.

M. Štefanči., R. Milači., A. Mladenovič, K. Janković, M. Stojanović, J. Turk,

A. Šajna, A. Mauko Pranjić

LEACHING TESTS OF LEAD AND ZINC FROM MINE TAILINGS OF

THE MEŽICA, SLOVENIA AND RUDNIK, SERBIA MINING AREAS


achievements in construction materials and structures, Vršac, 2017, 97-106


Lead and zinc mine tailings from the Kavšak lead and zinc mining waste

disposal site, located in the Mežica Valley in Slovenia, and from the still

operative mining area near the village of Rudnik in central Serbia, were

characterisedin order to determine their suitability as a replacement material for

fine aggregate in concrete. In both cases the mineralogical diversity of the

gangue, which included lead- and zinc-bearing minerals, was first investigated

by means of qualitative phase analyses, which confirmed the presence of these

minerals within the detection limits of this method. In the leaching studies

which followed, not only demineralised water was used as a leachant (as

prescribed in the test method according to the standard SIST EN 1744-3) but

also a highly-alkaline synthetic pore solution which is closer to that in real

cement systems. It was found that the measured concentrations of lead and zinc

were, by a factor of 70 and 50, respectively, higher in the leachate of the tailings

from the Kavšak waste disposal site than in those from the flotation plant at

Rudnik.

Keywords: leaching test, tailings,lead and zinc mining waste.



ŠTAMPANO U IZVODU (M34)

D. Olćan, N. Obradović, S. Filipović, A. Terzić, V.r Pavlović, M. Kachlik, K.

Maca, A. Đorđević

ASSESSING ELECTRICAL PROPERTIES OF CERAMIC SAMPLES

Advanced Ceramic and Application VI – New frontiers in multifunctional

material science and processing, Belgrade, 2017, 51.

We present an overview of electromagnetic numerical techniques and

measurement apparatus that have been used for assessing electrical properties of

ceramic samples. The complex permittivity of the ceramics is typically the first

electromagnetic property of interest. In the measurement approach that we use,

ceramic samples, in the shape of pills with metalized faces, are placed in either

a proprietary coaxial chamber or in an open fixture. The scattering parameter

(reflection coefficient) is measured using a network analyzer. For the

deembedding of the complex permittivity of a sample one needs precise

electromagnetic simulations, including detailed models of the chamber or the

open fixture. For lower and intermediate frequencies we use a numerical

technique for electrostatic analysis, based on the method of moments with

Galerkin testing. We create a database that is used afterwards for evaluation of

the complex permittivity practically in real time. For higher frequencies, a full

electrodynamic model of the chamber is developed with WIPL-D software. For

all our deembedding techniques, we have also developed a detailed model of

losses in the SMA coaxial connectors, which is essential for a precise evaluation

of the imaginary part of the complex permittivity for low-loss dielectrics. We

present results of several measurements in order to illustrate the used techniques

Keywords: electrical properties, ceramics.


SAOPŠTENJE SA SKUPA NACIONALNOG

ZNAČAJA ŠTAMPANO U CELINI (M63)

Z. Radojević, Lj. Miličić, A. Terzić, M. Vasić

ISPITIVANJE MOGUĆNOSTI PRIMENE KERAMIČKIH GLINA SA

LEŽIŠTA „BREZACI“ U PROIZVODNJI PLOČICA

XXVII međunarodni simpozijum o istraživanjima i primeni savremenih

dostugnuća u građevinarstvu u oblasti materijala i konstrukcija, Vršac, 2017,

67-75.

Mineralne sirovine kao potencijalni resursi,čine okosnicu razvoja nacionalne

ekonomije svake zemlje, a njihovu valorizaciju treba svrstati u njene strateške

planove razvoja.U ovom radu su prikazani rezultati ispitivanja uzoraka

keramičkih glina sa ležišta „Brezaci“ i ocena njihove primenljivosti. Ispitivanja

su obuhvatila: hemijsku, mineralošku i termičku identifikaciju (vatrostalnost,

temperatura klinkerovanja i sinterovanja). Ispitivane su i tehnološke

karakteristike: plastičnost, svojstva u sušenju (skupljanje, bigot kriva i

čvrstoća). Uzorci su pečeni na četri temperature u oblasti 1000 – 12500C. Na

pečenim uzorcima ispitivano je: skupljanje, upijanje vode, čvrstoća na lom i

boja. Na osnovu dobijenih rezultata data je ocena prmenljivosti ispitivanih

keramičkih glina u proizvodnji pločica i u drugim privrednim granama.

Ključne reči: keramičke gline, keramičke pločice, vatrostalnost, sinterovanje.


T 153

CERAMIC MATERIALS

AND POWDERS

T 153

KERAMIČKI

I PRAŠKASTI MATERIJALI


RAD U ČASOPISU MEĐUNARODNOG

ZNAČAJA VERIFIKOVANOG POSEBNOM

ODLUKOM (M24)

S. Dević, M. Cocić

SUBMERGE ENTRY NOZZLES BASED ON ALUMO-GRAPHITE

REFRACTORY MATERIAL IN THE PROCESS OF CONTINUOUS

STEEL CASTING

Materials Protection, 58, 2, 2017, 151-157.

Submerge entry Nozzles are parts made of refractory material and are utilized

for steel casting in the continuous casting process. Steel is cast from the tundish

into the crystallizer through the Submerge entry Nozzle (SEN). The role of the

SEN is to protect steel from oxidation and to provide a uniform flow of steel

during casting[1][2]. SEN are manufactured from refractory material with

diverse composition. At the beginning of application of SEN, when introducing

the continuous casting process, white SEN, based on melted quartz, were

utilized.White SEN were utilized primarily for casting one steel grade. Alumo-

graphite SEN are another type of SEN that are utilized for casting all steel

grades. They are sensitive to thermal shocks, so before use they must be heated

in special heating facilities at the temperature ranging from 1000°C-1100°C.

Alumo-graphite SEN are manufactured by special isostatic pressing process.

These are used successfully today. During casting, the SEN are in contact with

steel on the internal side of the wall, and on the external side of the wall with

casting powder and slag formed in the crystallizer. Internal erosion sometimes

appears at the contact with steel on the internal side of the wall of alumo-

graphite SEN, but build-up is formed more often. The SEN erosion occurs on

the external side of the SEN wall, which originated due to the effect of casting

powder and slag. All three phenomena affect SEN durability. External erosion

reduces the thickness of SEN wall and causes SEN cracking. On the other hand,

the formed build-up reduces the diameter of SEN orifice (aperture) leading to

reduction of steel flow and excluding the SEN from the exploitation process.

Depending on the steel grade being cast, mineralogical composition of casting

powder, quality of alumo-graphite SEN, SEN design, technological parameters

and technological process itself, the internal, external erosion or build-up will


appear on the internal wall of the alumo-graphite SEN. Each of enumerated

phenomena affects the lifetime of the alumographite SEN.This scientific paper

aimed at presenting and explaining the phenomena and causes of reduced

lifetime of the alumo-graphite SEN on a few characteristic examples.

Key words: SEN (submerge entry nozzle), alumo-graphite material, erosion,

build-up.




M. Cocić, M. Logar, V. Tasić, S. Dević, S. Cocić

THE POSSIBILITY OF USING THE FINAL FLOTATION WASTE FOR

OBTAINING THE GLASS-CERAMICS

XII International Symposium Recycling Technologies and Sustainable

Development, Bor, 2017, 74-81.

To find the optimal composition and conditions of crystallisation for obtaining

the applicable materials, thermal properties of the following materials were

tested: final flotation waste (FFW) (originating from the RTB Bor Company,

Serbia), basalt and tuff, and then, a mixture of FFW with basalt (10 % -T10,

20% - T20 and 40% -T40) and the mixture of FFW with tuff (20% - P20 and

40% - P40). The glass-ceramics obtained by sintering of the FFW, the mixture

of FFW with basalt (T20 and T40) and the mixture of FFW with truff (P20 and

P40) were characterized. The glass-ceramics sintered from the pure FFW

(1080°C/36h) has good mechanical properties, such as high propagation speed

(4500 m/s) and hardness (10800 MPa), as well as very good thermal stability.

The glass-ceramics obtained from mixtures shows weaker mechanical

properties compared to that obtained from the pure FFW. The mixtures of the

FFW with tuff have a significantly lower bulk density compared to other

obtained glass-ceramics. Our results indicate that the FFW can be applied as a

basis for obtaining the construction materials.

Keywords: FFW, sintering, thermal properties, glass-ceramics, mechanical

properties.

M. Cocić, V. Tasić, S. Dević

DETERMINATION OF THERMAL SHOCK RESISTANCE OF GLASS

FRIT USING NONDESTRUCTIVE TEST METHODS

XXV International Conference ECOLOGICAL TRUTH Eco-Ist' 17, Vrnjačka

Banja, 2017, 242-250.

In this study, the behavior of glass-ceramics synthesized a glass frit FFW (final

flotation waste) originated from the RTB Bor company, was investigated.


Thermal shock resistance was monitored, in order to assess the possibility of

application of such waste material. Thermal shock of the samples was

conducted using water quench test. Ultrasonic measurements ware used as a

nondestructive quantification of thermal shock damage in the bulk of the

specimens. Phase composition was determined by X-ray powder diffraction

analysis. Results of the thermal shock stability testing indicated that level of

destruction of sample is about 43% for 20 cycles of water quench test.

Keywords: Final flotation waste (FFW), glass-ceramic, thermal shock,

ultrasonic velocity.

S. Dević, M. Cocić

MINERALOGICAL COMPOSITION OF THE SEN INTERNAL BUILD-

UP

5th International Congress Engineering, Enviroment and Materials in Processing

Industry, Jahorina, BIH, 2017, 539-546.

The mineralogical composition of the internal build-up of the SEN (submerge

entry nozzle) is presented in this paper, which is formed in the continuous steel

casting process. Two methods were used for determining the mineralogical

composition of build-up: optical microscopy and X-ray diffraction method.

Optical testing was carried out on the polarization microscope for transmitted

light - Jena pole (immersion preparations), and XRD was performed on the X-

ray diffractometer Kristaloslex 810. The spectrometer ARL 9800 IX-P was used

for determining the changes in chemical composition of the SEN wall, by

zones, namely, by the X-ray fluorescent spectrometry method. SEN is a part of

the nozzle set that is used for continuous steel casting. It is manufactured from

the refractory material based on the alumino-graphite, by the isostatic pressing

method. The basic role of the SEN, in continuous steel casting, is providing a

uniform steel flow from the tundish into the crystallizer and protecting steel

from oxidation. During the casting process, the internal side of the SEN wall is

in contact with steel. Build-up is often formed on the internal side, reducing the

SEN orifice, steel flow and lifetime of the nozzles. The formation of build-up

on the internal side of the SEN is caused by the accumulation of Al2O3 and

reactions of Al2O3, that can occur as the steel deoxidation product, as the

product of the secondary steel oxidation by means of the air (reoxidation),


through the formation of the crystallization core, induced by temperature

decrease near the SEN surface, but also as the product of reaction between Al in

molten steel and SiO2 from the SEN refractory material. The processes

occurring at the steel casting temperature (1550-1556°C) enable the formation

of gas sub-oxides Al2O and SiO in the refractory material itself, diffunding

through the nozzle wall toward the channel surface, and then to the steel melt.

On the surface of phase limits and directly with it goes on the oxidation reaction

of gas sub-oxides with oxygen from the steel and the formation of Al2O3 .The

formation of internal build-up is often the result of combination of the stated

processes. The internal build-up, presented in this paper, has been formed not

only by the effect of steel deoxidation and reoxidation process, but also due to

the appearance of internal erosion and diffusion that was going on in the SEN

refractory material. For the presentation of mineralogical composition of the

internal build-up of SEN, five build-ups were selected, formed at continuous

casting of two steel grades. Three build-ups were formed at carbon steel casting

(A series) and two build-ups formed at casting of the aluminum killed steel (B

series).

The paper contributes to better understanding of the phenomenon of build-up

formation, because it shows the results of five tested internal build-ups of the

SEN, changes in the contact zone of the SEN wall with steel, but also the

conditions and some technological parameters that dominated in the process

during the formation of the same.

Keywords: SEN (submerge entry nozzle), refractory material, steel, build-up.


T 210

MECHANICAL

ENGINEERING,

HYDRAULICS,

VACUUM TECHNOLOGY,

VIBRATION AND ACOUSTIC

ENGINEERING

T 210

MAŠINSTVO,

HIDRAULIKA,

VAKUUMSKA

TEHNOLOGIJA

I AKUSTIČKI

INŽENJERING




ODLUKOM (M24)

M. Arsić, S. Bošnjak, V. Grabulov, M. Mladenović, Z. Savić

USE OF NON-DESTRUCTIVE TESTS FOR THE ASSESSMENT OF

INTEGRITY AND SERVICE LIFE OF HYDRO-MECHANICAL

EQUIPMENT

Selected peer reviewed papers from the 12th International Conference on

Structual Integrity of Welded Structures (ISCS17), 2017, Timisoara, will be

published in Advanced Materials Research, 2017.

Technical diagnostics of hydromechanical equipment is based on testing

procedures including the history of the exploitation with expert knowledge of

structures and operating conditions, as well as, on the analysis of results

performed by experts with appropriate experience and knowledge in design,

exploitation, maintenance, reliability, fracture mechanics etc. Degradation of

properties of the material and/or welded joints of hydro-mechanical equipment

is being caused by the simultaneous influence of a large number of factors. First

of all, it is thought of technological, metallurgical, structural and conditions of

exploitation. In this paper, the selection of methodology for the rehabilitation of

hydro-mechanical equipment is presented based on the previously conducted

assessment of state of equipment using the nondestructive testing methods.

Repair welding, repair of damaged surfaces by cold metallization, corrections of

existing structural solutions of metallic components in order to improve their

technical characteristics and extend the service life are presented.

Keywords: hydro turbine, non-destructive testing, degradation of material,

structural integrity.


M. Dojčinović, M. Arsić, S. Bošnjak, A. Murariu, Z. Malešević

CAVITATION RESISTANCE OF TURBINE RUNNER BLADES AT

THE HYDRO POWER PLANT ‘DJERDAP'

Structural Integrity and Life, Vol. 17, No. 1, 2017, 55-60.

Hydro power plants are interested in developing means of protection of turbine

and hydromechanical equipment from undesirable occurrences, such as

degradation of parent material and/or weld metal of parts and structures, caused

by stresses and unpredictable influence of vibrations, fatigue, corrosion, erosion

and cavitation. Results of tests that refer to the cavitation resistance of turbine

runner blades made of cast steel 08X15H4ДМЛ, in accordance with GOST

standard are presented in this paper. For the testing of cavitation resistance

ultrasonic vibratory test method was used (with the stationary sample), for

which it is necessary to measure the mass loss during specified time intervals,

while the cavitation resistance of material is being defined taking into account

the incubation period and cavitation rate. Scanning electron microscope was

carried out to study the morphology of sample damage due to cavitation. The

obtained results showed that the tested steel has a good cavitation resistance,

and that fatigue is the main failure mechanism.

Keywords: turbine, runner blade, cavitation damage, cavitation rate, incubation

period.

V. Lazić, D. Arsić, R. R. Nikolić, M. Arsić, B. Hadzima

SELECTING THE LOW ALLOY-TEMPERED STEEL FOR

MANUFACTURING THE HIGHLY LOADED RESPONSIBLE PARTS

Communication, Vol. 19, No. 3, 2017, 119-114.

The selecting procedure of the optimal material for manufacturing the highly

loaded responsible parts for military applications is presented in this paper. The

considered part is in exploitation subjected to complex compressive-impact

loading and cyclically to high temperatures, as well. The proper selection of

material can be done exclusively based on the theoretical and experimental

analysis of properties of the steel in question. The theoretical and experimental

selecting of adequate steel for manufacturing such parts is done based on

requirements arising from their working conditions. Based on the available data

for various steels, chemical composition, mechanical and technological


properties, available CCT diagram, the optimal steel was selected for the given

working conditions. After the selection of the material, experimental

investigations on specially prepared material samples were conducted. The real

chemical composition of material was established, its most important

mechanical properties were determined, the hardness was measured and the

microstructure was determined, as well. After the conducted theoretical and

experimental investigations, the responsible machine part was manufactured

from the selected material by forging. Then, the mechanical and heat processing

was executed, after which the part was tested in the real working conditions.

Based on investigations of part'sbehavior in the real working conditions, it was

concluded that the selection of the material was adequate.

Keywords: heat resisting steel, heat affected zone, instrumented Charpy test,

impact toughness.




M. Arsić, S. Bošnjak, M. Mladenović, Z. Malešević, Z. Savić

INTEGRITY OF BEAM BRACES AND THREADED SPINDLE FOR

CONJOINT OPERATION OF TWO 5 MN BRIDGE CRANES

9th Triennial International Conference Heavy Machinery HM 2017, Zlatibor,

2017, A45-A52.

The beam connects two bridge cranes with the overall lifting capacity of 500 t

(2x250 t) and enables their simultaneous conjoint operation during the

rehabilitation or major overhaul of hydroelectric generating set equipment at the

hydro power plant ''Djerdap 2''. Two braces are being installed instead of two

hooks when that situation occurs. Threaded spindle is loaded with 500 t (5 MN),

while braces are loaded with 250 t (2.5 MN) each. Integrity of structures is a

relatively new scientific and engineering discipline which in a broader sense

comprises condition analysis, behaviour diagnostics, service life evaluation and

rehabilitation of structures, which means that, beside the usual situation in

which it is necessary to evaluate the integrity of structure when a flaw is

detected by means of non-destructive tests, this discipline also comprises stress

condition analysis for the crackless structure, most often through the use of the

finite element method. That's the way to obtain the precise and detailed

distribution of displacements, deformations and stresses, which enables

determination of weak spots at the structure, even before the initiation of the

crack. Non-destructive tests were performed in order to analyze the current

condition of braces and of the threaded spindle. On the basis of performed

analytical calculations it was determined that their integrity is not threatened,

although some internal non-homogeneities were detected by ultrasonic testing.

Keywords: cranes, ultrasonic testing, braces, threaded spindle, integrity of

structures.


M. Arsić, S. Bošnjak, M. Mladenović, Z. Malešević, Z. Savić

METHODOLOGY FOR THE REPAIR OF DAMAGES THAT

OCCURRED ON THE WELDED JOINTS AT THE BODY OF GUIDE

VANE APPARATUS VANES OF THE VERTICAL KAPLAN TURBINE

8th International Scientific Conference IRMES 2017, Trebinje, BIH, 2017, 359-

364.

Vertical Kaplan turbines, with nominal power of 178 MW and manufactured in

Russia, have been installed in 6 hydroelectric generating units of hydro power

plant ’Djerdap 1’. Experimental tests were carried out by non-destructive

methods in order to determine the turbine condition during the rehabilitation of

the hydro power plant. Lack of root penetration was detected in V40 welded

joints between upper and lower sleeves and bodies of guide vane apparatus

vanes. Height of the lack of root penetration was in the range between 5 and 15

mm, while the allowable height of the lack of root penetration is 3 mm,

according to the technical conditions. The upper sleeves were made of cast steel

25L (in accordance with GOST 977), while lower sleeves were made of steel

forging St 25 (in accordance with standards GOST 1050 for chemical

composition and GOST 8479 for forgings).Methodology for the repair of non-

penetrated welded joints between the sleeves and body of the guide vane

apparatus vane was composed taking into account the results of ultrasonic

testing. By repair methodology it is necessary to, due to the structural solution

and service function of guide vane apparatus vanes, specify a large number of

details, consider them carefully and carry them out in order to improve safety,

because if some of them get overlooked, underestimated or incorrectly

perceived, significant problems in turbine operation may occur.This

methodology refers solely to the repair of damaged welded joints between

sleeves and bodies of guide vane apparatus vanes.

Keywords: sleeve, guide vane apparatus vane, welded joint, lack of root

penetration, repair methodology.


M. Arsić, S. Bošnjak, N. Gnjatović, M. Mladenović, Z. Savić

ASSESSMENT OF INTEGRITY AND SERVICE LIFE OF THE UPPER

RING OF TURBINE RUNNER GUIDE VANE APPARATUS AT HYDRO

POWER PLANT ĐERDAP 1

XXII International Conference on Material handling, constructions and logistics

MHCL’17, Belgrade, 2017, 231-234.

During the rehabilitation of the hydroelectric generating set A6 at hydro power

plant ’Djerdap 1’, state analysis and integrity assessment werecarried out for all

vital components and structures. After the completion of non-destructive and

destructive tests carried out on parent material and welded joints of the structure

of the upper ring of guide vane apparatus as part of vertical Kaplan turbine

runner, it was decided that it should be replaced with a new one, because parent

material and welded joints were degraded beyond repair. Existing upper ring of

guide vane apparatus was made of steel St 3, in accordance with GOST

standard. New upper ring of guide vane apparatus was manufactured through

the use of steel S 235, in accordance with DIN standard. During ultrasonic

testing 6 mm high lack of root penetration was detected at the load carrying

welded joint along the entire circumference of the guide vane apparatus. It

should be noted that there is no possibility of restoring the welded joint,

becausethe occurrence of deformations at the structure has to be avoided. In this

paper the results of the check of load carrying capacity of welded joints are

presented, taking into account all weakened cross-sections.Determination of

load carrying capacity and fatigue strength were carried out in the usual way, as

well as the stress state analysis performed through the use of finite element

method in order to determine the influence of undercuts. Assessment of

integrity and service life of the guide vane apparatus based on the influence of

cracks on stress distribution and fracture mechanics parameters was also carried

out.

Keywords: hydro turbine, upper ring of the guide vane apparatus, welded joint,

crack, integrity assessment.


RAD U VODEĆEM ČASOPISU

NACIONALNOG ZNAČAJA (M51)

M. Arsić, M. Mladenović, Z. Savić, S. Bošnjak, R. Miković

STATE ANALISYS OF THE UPPER RING OF GUIDE VANE

APPARATUS AT HYDRO POWER PLANT DJERDAP 1 CARRIED

OUT THE BASIS OF NON DESTRUCTIVE TESTS

Energija, ekonomija, ekologija, Vol. 19, No. 1-2, 2017, 245-249.

Vertical Kaplan turbines, with nominal power of 176 MW, manufactured in

Russia, have been installed in 6 hydroelectric generating units of hydro power

plant "Djerdap 1". Turbines were designed for the lifetime of 40 years due to

the required structural solution and the inability of performing periodic

inspections and state analyses. Welded structure of the upper ring of guide vane

apparatus is made by welding four segments made of St 3 steel together, in

accordance with standard GOST 977/88. Ring segments were welded by using

submerged arc welding (SAW). During the rehabilitation of turbine A6

nondestructive and destructive tests were performed on parent material and

welded joints in order to carry out the state analysis and estimation of level and

causes of eventual degradation of the structure of the upper ring of guide vane

apparatus at hydro power plant Djerdap 1. This paper comprises results of

magnetic particle tests and ultrasonic tests performed on welded joints. By

ultrasonic testing it was determined that there is a lack of root penetration in

welded joints, as well as lamellar tearing in parent material. Analysis of the

causes of parent metal degradation and occurrence of defects in welded joints of

the upper ring of guide vane apparatus was carried out on the basis of results of

experimental tests.

Keywords: hydro turbine, the upper ring of guide vane apparatus,

nondestructive testing, material degradation, welded joint.


M. Arsić, S. Bošnjak, M. Mladenović, Z. Savić

INTEGRITY EVALUATION FOR THE WELDED STRUCTURE OF

THE BUCKET-WHELL EXCAVATOR THROUGH THE USE OF NON

DESTRUCTIVE TESTING METHODS

Energija, ekonomija, ekologija, Vol. 19, No. 1-2, 2017, 241-244.

Technical diagnostics, when it comes to structures and components of bucket-

wheel excavators, should be based on certain testing procedures, history of their

use under service conditions, as well as on analysis of results obtained by

experts with adequate experience and knowledge regarding the design,

exploitation, maintenance, reliability, fracture mechanics etc. This paper

contains the case where non-destructive tests enabled integrity evaluation for

the welded structure of the bucket-wheel bracket with a flaw within the welded

joint. Bucket-wheel excavator was manufactured by german company

TAKRAF. Integrity of structures is a relatively new scientific and engineering

discipline, which in a wider sense encompasses state analysis and diagnostics of

behaviour and relaxation, service life evaluation and refurbishment of

structures. Beside the common situation in which it is necessary to evaluate the

integrity of a structure when a flaw is detected by NDT methods, this discipline

also encompasses the analysis of stress state. This approach is particularly

important for welded structures subjected to working conditions suitable for

crack initiation, such as fatigue.

Keywords: bucket-wheel excavator, bracket, welded joint, non-destructive

testing, structural integrity.



T 220

CIVIL ENGINEERING,

HYDRAULIC ENGINEERING,

OFFSHORE TECHNOLOGY,

SOIL MECHANICS

T 220

GRAĐEVINARSTVO,

HIDRAULIKA,

PRIOBALNA

TEHNOLOGIJA,

MEHANIKA TLA




ODLUKOM (M24)

M. Ćosić, B. Folić, R. Folić

FRAGILITY AND RELIABILITY ANALYSES OF SOIL - PILE -

BRIDGE PIER INTERACTION

Facta Universitatis, Series: Architecture and Civil Engineering, 2017.

The purpose of this paper is to present the methodology for performance-based

seismic evaluation of soil-pile-bridge pier interaction using the incremental

nonlinear dynamic analysis (INDA). The system's input signal is treated through

the generated artificial accelerograms which were subsequently processed by

soil layers and for the bedrock. The INDA analysis was post processed

separately for the pier and for the pile, so that the constructed PGA=f(DR)

curves are in the capacitive domain. For these curves the authors identified the

performance levels, while the regression analyses were conducted based on the

specific DR and PGA parameters. Fragility curves were constructed based on

the solutions of regression analysis and the probability theory of log-normal

distribution. Based on the results of fragility analysis, reliability curves were

also constructed. The methodological procedure for seismic performance

analysis presented in this study provides an integrated quantitative-qualitative

consideration and evaluation of the complex soil-foundation-structure

interaction (SFSI).

Keywords: incremental nonlinear dynamic analysis, pile performance, fragility,

reliability, artificial accelerograms.




A. Weninger-Vycudil, D. Kokot, J. Ćirilović, B. Kulauzović, P. Lepert, M. de

Lurdes Antunes, P. Marcelino, J. Litzka, M. Wistuba, N. Tanasić, F.

Schiffmann, R. Hajdin

CEDR-PROJECT ISABELA - THE WAY TO INTEGRATE SOCIAL

PERFORMANCE INDICATORS INTO ASSET MANAGEMENT

World Congress on Pavement and Asset Management, Baveno, Italy.

Social aspects in form of social effects and benefits become more and more

important in the context of assessing different maintenance strategies on the

road infrastructure networks. The decision makers need to present the

consequences of their strategies and policies on both, the technical level and

more and more the social level.The main objective of the CEDR-project

ISABELA (Integration of social aspects and benefits into life-cycle asset

management) is the definition of a holistic asset management framework for

social key performance indicators (S-KPIs) and social benefit modelling in form

of social effects (monetary and non-monetary), social backlog and social risk.

The project aims at identifying clear and justifiable social key performance

indicators in combination with existing technical parameters. ISABELA takes

into account maintenance aspects such as traffic availability, disturbance and

efficiency (travel time, vehicle operating costs, etc.), road safety (fatal and

severe accidents related to asset condition), environment (noise, air pollution,

natural resources, etc.) and socio economy (asset value, wider social effects,

etc.). The results of the project will provide a clear and reproducible definition

of the necessary basics for social benefit calculation within life-cycle-

assessment (LCA), life-cycle-cost-analysis (LCCA) and risk assessment. In

addition, the implementation packages of the project should clearly show how

the theoretical approach can be applied in practice under certain framework

conditions. Thus, ISABELA aims to extensively improve the assessment of the

total road infrastructure from socio economic viewpoint and open the door to

the development of broader asset management processes to meet actual and

future challenges.


Keywords: maintenance and rehabilitation strategies, political strategies for

pavements and assets, risk management, life cycle assessment, life cycle cost

analysis.

B. Folić, M. Ćosić, Đ. Lađinović, S. Sedmak

SOME CASES OF DAMAGE AND RETROFIT OF MIDDLE FRAME

BRIDGE AFTER EARTHQUAKE

Assessment, maintenance and rehabilitation of civil structures and settlements,

X international conference, Vršac, 2017, 105-112.

This paper discusses some aspects of (unusual) reinforcing middle frame of the

bridge (overpass) after earthquake, using brick infill. The effects of dynamics

soil-pile-structure interaction were introduced into the consideration, using link

elements. We analyzed possible cases of damage and retrofit of four columns

and states of plastic hinge at teh top and bottom of column and piles.

Keywords: dynamics soil-pile-structure interaction, link elements of infill, link

lements of soil

J. Ćirilović, G. Mladenovic, C. Queiroz

INTEGRATION OF GREENHOUSE GAS COST INTO NETWORK-

LEVEL PAVEMENT MANAGEMENT: CASE STUDY OF SERBIAN

ROAD NETWORK

Transportation Research Board, Washington DC, USA, 2017, 17-03380.

In addition to their attempt to lower overall maintenance costs while keeping

their road networks in the appropriate condition, road agencies are facing even

more demanding challenges as they incorporate effects of global climate change

and other environmental impacts into their decision making process. Many

studies and research initiatives have shown the impact of pavement condition on

vehicle fuel consumption and maintenance costs, indicating that maintaining the

pavement network at lower roughness levels would reduce fuel and parts

consumption, which is beneficial for the users. On the other hand, the more

intensive pavement maintenance, which is required to keep road networks in

better condition, is accompanied by substantial emissions and negative

environmental impacts. New technologies are emerging worldwide which tend


to prolong the period between road maintenance interventions. However, these

technologies, in many cases, require high upfront investments, which may be

acceptable (even recommendable) if one considers the whole life of a pavement.

The objective of this paper is to find an optimal maintenance plan at network

level that minimizes the total cost to society, which is the sum of: (i) agency

costs (i.e. cost of pavement maintenance and improvement works); (ii) user

costs (or vehicle operating cost - VOC); and (iii) the environmental impact cost

during the entire pavement life-cycle. Work presented herein proposes use of an

integrated model for pavement maintenance optimization at the network level,

which determines optimal maintenance plan that leads to lowering both total

society cost and total CO2 emissions during an analysis period. Proposed

solution finds balance between use of eco friendly technologies (such are

recycling or WMA) and use of the least costly maintenance treatments from the

road agency standpoint. The application of methodology is illustrated through

case study of on Serbian road network, but it can be applied elsewhere. The

methodology aims on reaching close-to-optimal solution of a complex multi-

objective problem.

Keywords: pavements, optimization, CO2 emissions, pareto, genetic

algorithms.

J.Ćirilović, G.Mladenovic, C.Queiroz

INTEGRATED LCA AND LCCA NETWORK LEVEL PAVEMENT

MAINTENANCE MODEL

World Congress on Pavement and Asset Management, Baveno, Italy.

Pavement management systems tend to lead to sound decision making

regarding the optimal maintenance strategy whichis, in most cases, based on the

achievement of minimal total society costs whichare defined as the sum of user

cost and road agency cost. User costs include costs related to the usage of the

road, such asthe costs of gasoline or diesel fuel, motor oil, spare parts,

pneumatics, costs related to travel time and accidents. In the last several years,

in addition to the aforementioned user cost drivers, costs related to

environmental impacts have been also considered as significant contributors to

overall costs. Road agency costs are generated by road construction and

maintenance activities such as overlays in various thicknesses, rehabilitation


and reconstruction. There is an established relationship that shows that

pavement deteriorationleads to an increase in negative environmental impacts.In

order to improve pavement condition, after reaching a certain threshold value, a

maintenance treatment is applied. That activity leads to lowering the emissions

generated during the usage phase but, at the same time, generates significant

negative environmental impact during the execution of the road works,such as

laying a new pavement layer. The objective of this paper is to present a model

that integrates LifeCycle Assessment (LCA) and Life Cycle Cost Analysis

(LCCA), on a network level. The model has been applied on the national road

network of Serbia. The results show how this integrated approach leads to more

sound decision making compared with current state of practice.

Keywords: pavement management systems, LCA, LCCA, optimization,

sensitivity analysis.

K. Božić-Tomić, N. Šušić, M. Prica, K. Đoković

ECONOMIC ANALYSIS OF PROJECT SOLUTIONS FOR LANDSLIDE

REPAIR WITH EFFECTS OF ADDITIONAL COLLAPSING OF SOIL

VII International Scientific Conference Geotechnics in Civil Engineering,

Šabac, 2017, 363-376.

The paper presents the economic analysis of seven project solutions of

landslides at different locations in Serbia. It has been proved that the actual total

amount of works and the final price of works on the landslide repair are higher

than designed Bill of Quantities. The reasons for increasing the quantity of

works and the prices of works are, to a large extent, due to additional collapsing

of soil with the appearance of secondary landslides, which could not be

calculated with classical mathematical models. Also, it has been proven that the

number of investigation boreholes are in direct correlation with the quality of

the obtained results of the mathematical model of the landslide.

Keywords: landslide, economic analysis, parameters, stability.


K. Đoković, J. Ćirilović, L. Čaki, N. Šušić

ESTIMATION OF CLAY COMPACTION PARAMETERS BY

MACHINE LEARNING 1

Transportation Research Board 96th Annual Meeting, Washington, USA, 2017,

Report 17-02100, 1-13.

The paper presents an application of three methods: regression analysis,

artificial neural networks (ANNs) and support vector machines (SVMs), for the

estimation of the compaction parameters: maximum dry density (MDD) and

optimum moisture content (OMC) from index properties of the soils: liquid

limit (LL), plastic limit (LP), plasticity index (PI), grain-size distribution and

specific gravity (Gs). The data collected in the course of laboratory testing was

used for the estimation of soil compaction parameters. The samples belong to

various clay types, and were obtained from cores from four earth-fill dams:

Rovni, Selova, Prvonek and Barje, located in Serbia and served as control

samples during soil compaction. The developed models can be used to estimate

the compaction parameters: (i) in the preliminary stages of the project

development, and (ii) in the course of the preliminary assessment of the

suitability of a material from borrow pits for use in earth-fill structures. This

analysis also shows the comparison between the three methods in terms of

applicability and goodness of fit.

Keywords: clay, compaction, regression analyses, artificial neural networks,

support vector machines.

K. Đoković, L. Čaki, N. Šušić

ESTIMATION, IDENTIFICATION AND STABILIZATION OF

DISPERSIVE SOILS

17th International Symposium of Macedonian Association of Structural

Engineers, Ohrid, Macedonia, 2017, ST-4, 950-957.

Dispersive soil can not be determined by visual identification or standard

identification - classification test such as granulometric analysis (grain size),

plasticity tests, etc. The paper presents the results of the testing of dispersivity

of fine-grained soil using classification tests, specially designed for the testing

of dispersive soil: the crumb test, the double hydrometer test and the pinhole

test. Also, the tests carried out by pin-hole were performed on samples of


dispersive soils with the addition of fly ash, which showed that the addition of a

certain percentage of ash is achieved by improving soil behavior, i.e. the soil

has become un-dispersive.

Keywords dispersive soils, the crumb test, the double hydrometer test, pin-hole

test.

K. Đoković, O. Mažibrada

COMPARISON EN AND SRPS STANDARDS FOR GEOTECHNICAL

IDENTIFICATION AND CLASSIFICATION OF SOIL

VII international scientific conference Geotechnics in Civil Engineering, Šabac,

2017, 69-74.

The paper presents a review of the newly adopted European standards for

geomechanical identification and soil classification SRPS EN ISO 14688-1:

2012 and 14688-2. Also, the basic principles of soil identification and

classification according to EN standards are given and a comparative analysis

with valid SRPS standards is presented.

Keywords: soil, geomechanical identification and classification, EN standards.

K. Đoković, S. Tošović

APPLICATION OF CEMENT MIXTURE STABILIZED CRUSHED

AGGREGATE AND RECYCLED ASPHALT IN ROAD

REHABILITATION



The papers present testing results of cement stabilized mixture of crushed stone

aggregate 0-31.5 mm (DKA) and recycled asphalt (RA) and pressed indirectly

tensile strength and modulus of elasticity, which are used in the classification of

the stabilized mixture and design the pavement structure in the process of cold

recycling. It also defines the optimal proportion of recycled asphalt stabilized

mixture with crushed stone aggregate.

Keywords: recycled asphalt, cold recycling.


S. Tošović, K. Đoković

POSSIBILITIES OF APPLICATION CEMENT STABILIZED

MIXTURE IN THE PROCESS OF COLD RECYCLING

5th Scientific – Expert Meeting Road and Environment, Vršac, 2017, 541-546.

This paper presents the determination of physical-mechanical parameters: the

indirect tensile strength (Rt) and the dynamic modulus of elasticity (E), which

are applied in pavement design in the process of cold recycling. Tests were

conducted on mixtures of cement stabilized crushed stone (DKA) and recycled

asphalt (RA) containing different proportions of this components and the

different percentage of 3%, 5% and 7% of cement. In addition to determining

the above parameters for the design, the goal of the conducted test was to

determine the optimal, and the proportion of recycled asphalt in mixture with a

crushed stone aggregate, and of the optimal addition of cement as hydraulic

binder. On the basis of the obtained values was carried out categorization of the

stabilized mixture according to the standard EN 14227-10: 2006, which

continues to have application in the design of pavements.

Keywords: recycled asphalt, cold recycling, indirect tensile strength, dynamic

modulus of elasticity.

B. Folić, N. Šušić, M. Ćosić

THE USE OF COMPUTERS IN DETERMINING THE PARAMETERS

OF THE FUNCTIONS FOR LOESS SOIL

VII International Scientific Conference Geotechnics in Civil Engineering,

Šabac, 2017, 155-164.

The paper presents the possibilities of determing functions of some

characteristic parameters of loess soil. The loess soil is of Eolian origin, its

formation is related to the Ice Age, it is classified as dusty-sandy-clayey soil,

and very large extent of results are possible depending on humidity, location,

porosity, anisotropy, etc. The problem of loess soilis is very complex and this is

an attempt to restore partially neglected research by Milović, Stevanović and

others with the classification of characteristics, which can only be used with a

certain probability.


Keywords: loess soil, porosity, anisotropy, loess sampling, dry weight, curve

edometric curve, specific coefficient of settlement.


T 230

BUILDING CONSTRUCTION T 230

VISOKA GRADNJA




ODLUKOM (M24)

M. Ćosić, R. Folić, S. Brčić

AN OVERVIEW OF MODERN SEISMIC ANALYSES WITH

DIFFERENT WAYS OF DAMPING INTRODUCTION

Building Materials and Structures, Vol. 60, No. 1, 3-30, 2017.

The authors of the paper, on the basis of the analysis of a large number of

scientific papers, presented their original systematization of seismic analyses of

structures, where a large number of them were developed during the last twenty

years. Seismic analyses are generally classified into two (four) groups: Linear

Static Analyses (LSA) and Nonlinear Static Analyses (NSA), and Linear

Dynamic Analyses (LDA) and Nonlinear Dynamic Analyses (NDA). The

analyses of nonlinear seismic structural response were classified separately

from the Target Displacement Analyses (TDA) which defines the relationship

of the seismic demand and seismic response. On the other hand, classification

was also conducted depending on whether a nonlinear response of the system is

obtained by the implementation of incremental-iterative procedures or by

implementation of semi-iterative and/or semi-incremental procedures. NDA

were classified according to the concept of mathematical formulation, i.e.

whether they are based on only one dynamic analysis, several dynamic analyses

or they are solved in combination with other methods. By implementing the

conducted systematization of seismic analyses, one can efficiently consider

which type of analysis is optimal for structural analysis and which type of

analysis should be taken into account in the phase of preliminary and final

analyses in the course of scientific research and professional projects.

This paper also presents the aspects of damping modelling in structural analysis

through the systematization of damping types and flowcharts, depending on the

type of analysis applied: linear and nonlinear, static and dynamic. Damping has

been systematized based on the way it was introduced into calculations, i.e. over

material damping, link element damping and damping directly introduced into

the analyses which are conducted in capacitive, time and frequency domains. In

the process of creating numerical structural models, the type of damping and the


way of its introduction into structural analysis can be very efficiently selected

by applying the flow charts developed. By applying the developed flowcharts,

alternative approaches to the introduction of damping into structural analysis

can also be defined.

Keywords: seismic analyses, damping, systematization, performances,

structures.




M. Drpić, M. Mirković

NEW APPROACH IN THE CLASSIFICATION OF THE REACTION

TO FIRE PERFORMANCE OF CONSTRUCTION PRODUCTS



Passive fire protection in the civil engineering shall be prescribed in the national

regulation accross the global frame and specific national rules. Reaction to fire

performances of construction products makes the basic part ot theese activities,

and the new approach in EU-regulations leads to some changes of

classiffications performances. All of theese adoptions are based on Regulation

(EU) No. 305/2011.

Keywords: passive fire protection; civil engineering; national rules; reaction to

fire performance.

M. Mirković, M. Aškrabić, Z. Petojević, G. Todorović, R. Gospavić

DETERMINATION OF CONVECTIVE HEAT TRANSFER

COEFFICIENT OF A FACADE WALL BY LONG- TERM

MEASUREMENTS



In this paper, results of measurements of heat fluxes on inner and outer surfaces

of a facade wall of a resident building in Belgrade as well as air temperatures on

both side of the wall are represented. The experimental data were obtained in

simultaneous measurements in period from the 1st May 2017 until the 30th May

2017 in every 5min in one apartment with heterostructure facade wall facing

north. Two “gSKIN” fluxmeters and NiCr-Ni thermocouple are used in the

experiment. Based on experimental data, a convective heat transfer coefficients

on both sides of the wall as a function of time and their means are calculated.

Also an accumulation of heat in the wall as a function on time were calculated

and shown.


Keywords: The heat transfer coefficient, temperature measurements, heat flux

measurements, the accumulation of heat.

N. Mirković, P. Mitković,B. Ninić, J. Milovanović, M. Mirković, Z. Petojević, D.

Šumarac, R. Gospavić, G. Todorović

COMPOSITE STRUCTURAL MEMBERS IN FIRE CONDITIONS AND

MEASURES OF PROTECTION

5th International Conference Contemporary achievements in civil engineering,

Subotica, 2017, 131-140.

In this paper, the results of numerical simulation of 2D non-stationary

temperature fields in commonly used composite structural members made of

steel and concrete in fire conditions were presented. Simulation is based on the

model which includes temperature dependence of physical parameters of

materials, specific heat and thermal conductivity. Analysis of composite

structural members comprises determination of a heat flux field which

additionally facilitates understanding of region and geometry of heat flow, thus

enhancing fire protection design. Initial temperature distribution is adopted as

uniform, according to Eurocode. Fire conditions were according to ISO 834.

The FEM computations for different protection scenario and protective

materials for partially encased I section - are conducted in ABAQUS. Obtained

results can be used in cost optimization of fire protection measures.

Keywords: fire protection, composite structural members, heat flux,

temperature field.

Z. Petojević, P. Mitković, N. Mirković, J. Milovanović, B. Ninić, , M. Mirković,

D. Šumarac, R. Gospavić, G. Todorović

ESTIMATION OF TEMPERATURE TRANSFER FUNCTION IN

FACADE WALL HEAT TRANSPORT

5th International Conference Contemporary achievements in civil engineering,

Subotica, 2017, 739-748.

This paper is presenting a method for temperature transfer function (TTF)

estimation by filtering an experimentally collected data. The experimental data

were obtained in simultaneous measurements of inside and outside temperatures


variations during the period of 3 months of a building located in Belgrade,

Serbia. The TTF estimation is based on Wiener filtering technique for the

dynamic systems with finite impulse response (FIR). TTF is derivate in time

and complex domain and the correctness of the acquired transfer function is

tested on the new input data set. The estimated TTF in complex domain is used

to get decrement factor (DF) and time lag (TL) between the temperatures.

Keywords: transfer function, heat transport, decrement factor, time lag


T 270

ENVIRONMENTAL

TECHNOLOGY,

POLLUTION CONTROL

T 270

TEHNOLOGIJA

ŽIVOTNE SREDINE,

KONTROLA ZAGAĐIVANJA


RAD U TEMATSKOM ZBORNIKU

MEĐUNARODNOG ZNAČAJA (M14)

D. Radulović, A. Terzić, Lj. Andrić

THE CONSTRUCTION AND CERAMICS INDUSTRY WASTE

GYPSUM VALORIZATION POSSIBILITIES

IV Advanced Ceramics and Applications Conference, Chapter 32,

Springer/Atlantis Press, USA, 2017, 475-491.

The construction work and ceramic materials industry debris is an important

source of waste that ends up unused and disposed on municipal solid waste

landfills. Besides concrete and clay based materials, gypsum waste is one of the

larger contributors to the building and industry byproducts production chain.

The possibilities of waste gypsum revitalization and reutilization in the ceramic

industry and civil engineering are investigated in this paper. The gypsum in its

dihydrate form is used for moulds in the production of ceramic cast materials.

The interest in recovering gypsum waste is increasing as the demand for

sustainable production grows. Before secondary gypsum is reapplied, its

properties and the recycling process have to be technically and environmentally

evaluated. By recycling gypsum waste, natural gypsum deposits are being

preserved. Furthermore, large percentage of this byproduct achieves its

reutilization potential. In this context, this paper investigates physical

properties, the chemical composition and the thermal behavior of the waste

gypsum. The goal is to assess the feasibility of using waste gypsum and to

evaluate the viability of the recycling process. The results indicate that the

reutilization of gypsum waste might provide a viable substitute for clay in the

ceramics industry. Reapplication of the revitalized secondary gypsum is

approved from both economical and environmental aspect.

Keywords: construction materials; physic-mechanical properties; recycling;

eco-friendly ceramics.




D. Stanojlović, T. Spasojević-Šantić, M. Trivunić

ANALYSIS OF THE STATE OF CONSTRUCTION WASTE

MANAGEMENT IN REPUBLIC OF SERBIA

International Scientific Conference People, Buildings and Environment 2016

(PBE2016), Luhacovice, Czech Republic, Vol. 4, 2016, 221-229.

Construction waste includes waste generated during construction,

reconstruction, maintenance or demolition of existing buildings, as well as

waste generated from excavated material, which cannot be used without prior

treatment. It is estimated that about 1 million tones of construction and

demolition waste is produced in the Republic of Serbia annually. Construction

waste in Serbia ends up at municipal waste landfills and utilize as an inert

material for covering of waste at the landfills. This kind of approach has a

negative impact on the environment and human health. Therefore, the purpose

of this paper is to present analysis of the state of construction waste

management in the Republic of Serbia. The research results show that there is

no consolidated data of the specific composition of construction waste that is

being disposed of at landfills at any level. Additionally, it’s necessary to

establish control of construction and demolition waste quantity, composition

and stream, which would meet requirements for designing a system of

collection, transport, recycling, reuse and disposal of the waste.

Keywords: by-product, construction waste, landfills, recycling, waste

management.


S. Serbula, N. Mijatović, J. Milosavljević, A. Radojević, T. Kalinović, J.

Kalinović, R. Kovačević

ZN AND PB UPTAKE AND TRANSLOCATION IN NETTLE FROM

METAL POLLUTED AREA

The 49th International October Conference on Mining and Metallurgy, Bor,

2017, 161-165.

The analysis of Zn and Pb content and biological factors were performed in

order to investigate the uptake and translocation of metals, as well as

biomonitoring abilities of nettle. The soil and plant material were sampled in the

area polluted with metals originating from the copper mining activities. The

content of Zn, an essential element, was higher in plant material than the

content of potentially toxic Pb. The results have shown that nettle roots and

leaves acted as excluders of Zn or Pb. The translocation factor indicated

effective transport of metals from roots to leaves at low soil concentrations.

Keywords: nettle, zinc, lead, soil pollution.




M. Vasić, Z. Radojević, Lj. Miličić

METODE ZA OCENU UTICAJA OPASNIH MATERIJA PRISUTNIH U

GRAĐEVINSKIM PROIZVODIMA NA ŽIVOTNU SREDINU



413-418.

Evropska komisija je 23. juna 2016 godine zauzela stav da je deo

harmonizovanih Evropskih standarda (hENs) kojima se naznačava upotreba

nacionalnih propisa za određivanje uticaja opasnih materija uključujući i

Evropsku bazu o opsanim materijama, neusklađen sa uredbom o građevinskim

proizvodima CPR. Potom je Evropski savet definisao manadat tehničkim

komitetima CENa sa preporukama da se u hEN standarima mora na

nedvosmislen i jasan način u skladu sa zahtevima CPR-a odnositi prema emisiji

opasnih materija, prisutnih u građevinskim proizvodima, na životnu sredinu. U

ovom radu će biti ukratko predstavljene metode koje je do sada razvio tehnički

komitet TC 351. Funkcija standarda CEN/TS 16637-1 se ogleda u pružanju

informacija, na osnovu kojih CEN tehnički komiteti za svaki konkretni

građevinski proizvod i EOTA eksperti zauzimaju stavove u odnosu na

relevantne ispitne metode koje se odnose na ocenu uticaja opasnih materija

prisutnih u građevinskim proizvodima na životnu sredinu. Na ovaj način se vrši

podsticanje proizvođača građevinskih proizvoda da deklaraciju performansi

koje se odnosi na sadržaj opasnih materija izvrše na osnovu rezultata

ispitivanja.

Ključne reči: opasne materije, građevinski proizvodi, deklaracija o

performansama, životna sredina, tehnička regulativa.



T 350

CHEMICAL TECHNOLOGY

AND ENGINEERING

T350

HEMIJSKA TEHNOLOGIJA

I INŽENJERING



ČASOPISU IZUZETNIH VREDNOSTI (M21A)

M. V. Vasić, L. Pezo, J. D. Zdravković, Z. Bačkalić, Z. Radojević

THE STUDY OF THERMAL BEHAVIOR OF MONTMORILLONITE

AND HYDROMICA BRICK CLAYS IN PREDICTING TUNNEL KILN

FIRING CURVE

Construction and Building Materials, Vol. 150, 2017, 872-879.

The aim of this study was to test montmorillonite and hydromica type of brick

clays by using simultaneous thermal analysis and dilatometry in an assessment

of the suitability of brick clays to produce building elements. The plasticity

coefficient and drying susceptibility were determined to discover the behavior

of brick clays. Fired products’ characteristics were studied by performing water

absorption and compressive strength tests. All the methods were employed in

the construction of the firing curves in a tunnel kiln. The results could increase

the degree of certainty to lead the production process towards obtaining the

desired features of brick elements.

Keywords: brick clays, thermal analyses, firing curves, process optimization.


RAD U ISTAKNUTOM MEĐUNARODNOM

ČASOPISU (M22)

M. Vasić, R. Rekecki, Z. Radojević

A PROCEDURE FOR SETTING UP THE DRYING REGIME THAT IS

CONSISTENT WITH THE NATURE AND PROPERTIES OF THE

CLAY RAW MATERIAL

Drying Technology, 2017.

http://dx.doi.org/10.1080/07373937.2017.1324879.

Over the past three decades, traditional ceramic facilities: chamber and tunnel

dryers are improved. Better thermo-technical equipment, operational strategies

as well as reliable scale - up methodologies have lead to higher quality of the

dried clay roofing tiles. Although there has been a progress, up to this study,

there is no universally or even widely applicable criterion, which could be used

to precisely define the change of drying air parameters (humidity, temperature,

and velocity) during the drying process. The objective of this study was to

specify the variable air parameters that should be used during the drying process

in order to approach as much as possible to the theoretically defined optimal

drying process.

Keywords: drying process, drying regime, effective diffusion coefficient, clay

roofing tile, clay raw material.




M. Vasić, Z. Radojević

DEFINING A PROCEDURE FOR PREDICTING THE DURATION OF

THE APPROXIMATELLZ ISOTHERMAL SEGMENTS WITHIN THE

PROPOSED DRYING REGIME AS A FUNCTION OF THE DRYING

AIR PARAMETERS

International Conference on Modern Technologies in Industrial Engineering

ModTech 2017, Sibiu, published in IOP Conf. Series: Materials Science and

Engineering, 2017, 227.

doi:10.1088/1757-899X/227/1/012134.

One of the main disadvantages of the recently reported method, for setting up

the drying regime based on the theory of moisture migration during drying, lies

in a fact that it is based on a large number of isothermal experiments. In

addition each isothermal experiment requires the use of different drying air

parameters. The main goal of this paper was to find a way how to reduce the

number of isothermal experiments without affecting the quality of the

previously proposed calculation method. The first task was to define the lower

and upper inputs as well as the output of the “black box” which will be used in

the Box-Wilkinson’s orthogonal multi- factorial experimental design. Three

inputs (drying air temperature, humidity and velocity) were used within the

experimental design. The output parameter of the model represents the time

interval between any two chosen characteristic points presented on the Deff – t.

The second task was to calculate the output parameter for each planed

experiments. The final output of the model is the equation which can predict the

time interval between any two chosen characteristic points as a function of the

drying air parameters. This equation is valid for any value of the drying air

parameters which are within the defined area designated with lower and upper

limiting values.

Keywords: drying process, drying regime, effective diffusion coefficient, clay

roofing tile, clay raw material.




M. Vasić, Z. Radojević

EXTENSION OF THE RECENTLY REPORTED PROCEDURE FOR

OPTIMAL DRYING REGIME SPECIFICATION



Recently reported procedure, for predicting the optimal non-isothermal drying

regime of clay masonry units, has not been widely used due to the fact that it is

based on a large number of experiments. The objectives of this study were to

reduce the number of experiments and to keep the quality of the previously

proposed calculation method. Extension procedure was based on the Box-

Wilkinson’s orthogonal multi – factorial “Black box” method. The final output

of the model represents the equation which can predict the time interval

between any two chosen characteristic points (registered on Deff – t curves) as a

function of the drying air parameters.

Keywords: drying, heavy clay units, drying regime, effective diffusion

coefficient.



T 450

METAL TECHNOLOGY,

METALLURGY,

METAL PRODUCTS

T450

TEHNOLOGIJA METALA,

METALURGIJA,

PROIZVODI OD METALA




ODLUKOM (M24)

V. Aleksić, Lj. Milović, B. Aleksić, S. Bulatović, Z. Burzić, A. M. Hemer

BEHAVIOUR OF NIONIKRAL-70 IN LOW-CYCLE FATIGUE

Structural Integrity and Life, Vol.17, No. 1, 2017, 61-73.

Experimental research on the behaviour of high-strength low-alloy steel

(HSLA) exposed to low-cycle fatigue (LCF) with controlled and fully reversible

strain ( /2 = const, R = min/ max = –1) has been analysed. LCF tests are

performed on a series of smooth bar shaped specimens, 11 11 95 mm,

parent metal (PM), welded joint (WJ) and simulated heat affected zone (SHAZ)

of steel Nionikral 70 (NN-70) with semi-amplitude of controlled strain, /2 =

0.40-0.80. The results of the experimental investigation have given us important

information on the understanding of fatigue behaviour of steel NN-70 and its

welded joints. In this work the results of static and dynamic-, that is

monotonous and fatigue behaviour of the material, are compared, which is a

practical contribution to the assessment of the behaviour of PM and WJ of steel

NN-70 exposed to effects of low cycle fatigue, i.e. monotonous and fatigue

behaviour of the material.

Keywords: high strength low-alloyed steel (HSLA), low-cycle fatigue (LCF),

simulated heat affected zone (SHAZ), Nionikral 70 (NN-70).




Lj. Milović, B. Aleksić, S. Petronić, A. M. Hemer, V. Aleksić

P91 STEEL SIMULATED HAZ BEHAVIOUR AT 600°C

12th international conference Structural Integrity of Welded Structures,

Timişoara, Romania, 2017.

An investigation has been carried out into the behavior of type IV cracks region

in simulated heat affected zone (HAZ) of P91 steel at operation temperature of

600°C. HAZ region where type IV failures may occur have been studied in

details. Results are reported on the simulated specimens 11x11x70 mm tested at

room and at operating temperature. The results of comparison of mechanical

characteristics and microstructure have been analyzed using two types of

simulated specimens: with postweld heat treatment (PWHT) and without

PWHT. The presence of precipitates at the grain boundaries in simulated type

IV zone of HAZ exposed to subsequent PWHT has been found. It is further

confirmed that the PWHT is necessary for P91 steel weldments.

Keywords: P91, Simulated HAZ, ICHAZ, PWHT.

S. Cvetkovski, V. Grabulov

DETERMINATION OF CHARACTERISTIC MICROSTRUCTURES IN

SIMULATED AND REAL TIG AND LASER WELDMENTS OF OPTIM

960 QC STEEL

9th International Scientific – Professional Conference Engineering Technologies

in Manifacturing of Welded Constructions and Products SBW 2017, Slavonski

Brod, Croatia, 2017, 106-115.

In this research work metallographic analysis of simulated and real

microstructures in HAZ of Optim 960 QC was performed. Thin sheets (6 mm)

were used for simulation and real TIG and laser welding. Special specimens

were prepared for welding simulation. The peak temperatures corresponding to

specific microstructures in the HAZ was obtained by performing welding using

Gleeble 1500 welding simulator. The following parameters were used in the


thermal simulation: heating rate: 500°C/s, peak temperature: 500, 600, 700, 800,

900, 1000, 1100, 1200, 1250, 1300 and 1350 °C/s, holding time: 1 s, cooling

8/5: 1,7 s (air cooling). Two autogenously TIG welding experiments

using different welding heat input were carried out. Besides, CO2 laser beam

welding experiments were carried out too.

After performing welding simulation and real welding. metallographic

preparation of specimen was done. Standard metallographic preparation of

specimens was performed. Besides optical microscopy; scanning electron

microscopy was used for microstructural analysis. Hardness measurements and

determinations of grain sizes were performed on simulated metallographic

specimens. Besides comparison of different micro constituents (real and

simulated), the length of total HAZ in dependence of the heat input was

analyzed too.

Keywords: Optim 960 QC steel, HAZ, welding microstructure, Gleeble

simulator, grain size.

V. Grabulov, Z. Burzić, M. Burzić, S. Perković, M. Manjgo

TESTING OF IMPACT PROPERTIES OF WELDED JOINTS BY

NOTCHED AND PRECRACKED SPECIMENS



Brod, Croatia, 2017, 354 – 361.

The application of high strength steel and its welded joint in structures, exposed

to very high stresses can be accepted if the properties satisfy strong

requirements. The benefits which can be obtained by increased strength must be

additionally confirmed by sufficient resistance to brittle fracture, e.g. by the

resistance to stress concentration. For that reason the data about impact V notch

toughness and about crack behaviour in impact and in stable crack growth

condition are required before final decision for the selection of high strength

steel for manufacturing highly loaded welded structures. For that, the data of

crack resistance for weld metal (WM) and the heat-affected-zone (HAZ) are

also necessary. Applied techniques in this experiment enabled to evaluate

separately notch and crack parameters of welded joint constituents (base metal -

BM, WM and HAZ), important for the application of high strength steel.


Keywords: welded joint, microalloyed steel, impact testing, crack sensitivity.

Z. Burzić, M. Burzić, V. Grabulov, S. Perković, M. Manjgo

FATIGUE OF HIGH STRENGTH STEEL WELDMENT IN PRESSURE

VESSELS APPLICATION



Brod, Croatia, 2017, 340 – 346.

The application of high strength steels in design of heavy duty welded

structures requires the data about the properties in different loading condition.

This is of importance for pressurized equipment, but also for other industrial

branches (cranes, earth moving machines). The behaviour under variable

loading can annul the benefits of high strength, and for that it has to be

analyzed. The testing results of high strength steel NIONIKRAL 70 (nominal

yield stress 700MPa) and its MMAW welded joints under variable loading are

presented and discussed. Fatigue crack growth rate is determined by precracked

specimens testing. The difference in crack growth rate properties between

parent metal, weld metal and HAZ is less expressed compared to other

properties of high strength steel welded joint.

Keywords: welded joint, microalloyed steel, Paris law, fatigue threshold,

fatigue crack growth rate.

Z. Odanović

ANALYSIS OF THE RAILWAY FREIGHT CAR AXLE FRACTURE

ESIS TC24 Workshop Integrity of Railway Structures, 2016, Leoben, Austria,

published in Procedia Structural Integrity, 4, 2017, 56-63.

Railway axles are vital parts of passenger or freight railway car. Their failure

may result in potentially disastrous consequences with possible human victims.

Accordingly, railway axles are designed to be highly reliable, while the

maintenance system requires periodically regular non-destructive inspection.

However, due to complex exploitation conditions, complex stress state and

multiple stress concentration, railway axles could experience fatigue failures.

This study presents an attempt to clarify the causes of an axle fracture of the


railway freight car for coal transport. Detailed analyses were conducted on the

axle mechanical properties. Novel methodology for calculation of the plane

strain fracture toughness KIc based on the measured values of the yield strength

and impact energy from KU data is estimated. Also, failure analysis of fractured

surface was performed. Macro and microstructure of the axle material is

included in analysis. The entire analysis has shown that the considered axle

failure was caused by inadequate maintenance and insufficient properties level

of the axle material in the railway axle critical cross-sections.

Keywords: railway engineering, failure analysis, destructive testing, pitting.



ŠTAMPANO U IZVODU (M34)

B. Aleksić, A. Grbović, A. M. Hemer, Lj. Milović, V. Aleksić

EVALUATION OF STRESS INTENSITY FACTORS (SIFS) USING

EXTENDED FINITE ELEMENT METHOD (XFEM)

17th International Conference on New Trends in Fatigue and Fracture NT2F17,

Cancun, Mexico, 2017, 88.

Finite element method has been used for decades for calculating Stress Intensity

Factors (SIFs), but it has some restrictions in crack propagation simulations

mainly because the Finite Element mesh needs to be updated after each

propagation step to track the crack path. Extended Finite Element Method

(XFEM) suppresses the need to mesh and remesh the crack surfaces and can be

used for modelling different discontinuities in 3D domains. Discontinuities can

be represented independently of the FE mesh by exploiting the partition of unity

(PoU) method. In this method enrichment functions are added to the

displacement approximation as long as the PoU condition is satisfied. Thanks to

XFEM, problems involving static cracks in structures, evolving cracks, cracks

emanating from voids etc., can be numerically studied and then, results can be

compared against the analytical and experimental values. Cracks are propagated

and after each step of the propagation the SIFs can be computed from the

numerical solution at several points along the crack fronts. Interaction integrals

are used to extract the mixed-mode SIFs with the help of auxiliary fields.

XFEM is still not fully recognized and needs to prove its practical worth in

order to be generally acknowledged. Results obtained by using XFEM for a

complex 3D geometry are still not regarded as reliable without experimental

checks. The purpose of this paper is to demonstrate that reliable values of SIFs

can be obtained for three-dimensional structures with cracks. Results and

conclusions given here should contribute to making a more objective judgment

about XFEM usefulness in solving wide range of problems, especially those

related to the fatigue design.

Keywords: stress intensity factors, extended finite element method, crack

propagation, fatigue design.

M64_1.pdf


B. Aleksić, V. Aleksić, A. M. Hemer, Lj. Milović, A. Grbović

DETERMINATION OF THE REGION OF STABILIZATION ON LOW-

CYCLE FATIGUE HSLA STEEL FROM TEST DATA

17th International Conference on New Trends in Fatigue and Fracture NT2F17,

Cancun, Mexico, 2017, 30.

Steel, NIONIKRAL 70 (NN-70), selected in this study to investigate the

experimental behaviour affected by fatigue loading, among other things, is used

in shipbuilding and for manufacture of pressure vessels as well. The experiment

was conducted using smooth round specimens made of steel NN-70 as parent

material (PM). When selecting stabilized hysteresis as a representative of all of

stabilized hysteresis for one strain level, and for the further processing of low-

cycle fatigue test results, the recommendations of standards have been used as

well as the methodology based on which linearity of the stabilization regions of

low-cycle fatigue was numerically determined. In present paper, the behaviour

of high-strength low-alloy (HSLA) steel under conditions of lowcycle fatigue

(LCF) has been experimentally tested and analyzed. Based on the experimental

results obtained in the programme EXCEL, characteristic regions of low-cycle

fatigue of steel NN70 have been determined, the most important being the

region of stable behaviour of materials, socalled "the region of stabilization".

From this region, on the basis of pre-defined requirements, characteristic

stabilized hysteresis have been isolated for each strain level, based on which the

indicators of low-cycle fatigue of steel NN-70 have been identified. For

selecting typical stabilized hysteresis and for further processing of the low-cycle

fatigue test results, new methodology with two new methods were used:

"Method of the middle stabilization (ms)" and "threshold NDT method

(tNDT)". The comparisons of those two methods are shown in this paper.

Keywords: low-cycle fatigue, HSLA, region of stabilization, NDT.


B. Aleksić, V. Aleksić, Lj. Milović

ANALYSIS OF THE EFFECTS OF BUTT WELDED JOINTS ON A

CARRYING CAPACITY OF A STRUCTURE TANK

International Conference on Experimental and Numerical Investigations and

New Technologies, 2017, Zlatibor, 27.

In the present paper, after calculation using the Finite Element Method (FEM),

stress distribution on the model of a part of the pressure-tank mantle without

welded joints (WJ), with transversal WJ, longitudinal WJ and cross point

location of WJ is analyzed. Also, FEM calculation and comparative analysis of

the effects of WJ on the stress distribution have been conducted using the tank

for liquid carbon dioxide as an example, on which, in addition to the mantle

sheet-metal and bottom with necessary openings and elements such as saddles

with supports and hangers, transversal and longitudinal butt WJ, have been

modeled.

Keywords: finite element method, stress distribution, pressure-tank, welded

joints.

M64_1.pdf




B. Aleksić, V. Aleksić, Lj. Milović

ANALIZA OPRAVDANOSTI MODELIRANJA SUČEONO

ZAVARENIH SPOJEVA KOD PRORAČUNA POSUDA POD

PRITISKOM

V Međunarodni kongres Inženjerstvo, ekologija i materijali u procesnoj

industriji, Jahorina, Bosna i Hercegovina, 2017, CD, 1136-1144.

U radu je posle proračuna metodom konačnih elemenata (MKE) analizirana

raspodela napona na modelu dela oplate rezervoara pod pritiskom bez zavarenih

spojeva (ZS), sa obimnim ZS, podužnim ZS i ukrsnim mestom ZS. Takođe, u

radu je na primeru rezervoara za tečni ugljendioksid, na kome su pored limova

oplate i danaca sa potrebnim otvorima i elementima kao što su sedla sa

osloncima i uške modelirani obimni i podužni sučeoni ZS, urađen proračun

MKE i uporedna analiza uticaja ZS na raspodelu napona.

Ključne reči: MKE, ZS, analiza raspodele napona.

V. Aleksić, B. Aleksić, Lj. Milović

METODOLOGIJA ODREĐIVANJA POKAZATELJA PONAŠANJA

HSLA ČELIKA PRI DELOVANJU NISKOCIKLIČNOG ZAMORA

V Međunarodni kongres Inženjerstvo, ekologija i materijali u procesnoj

industriji, Jahorina, Bosna i Hercegovina, 2017, CD, 1123-1135.

U radu je analizirano eksperimentalno istraživanje ponašanja niskolegiranog

čelika povišene čvrstoće (HSLA) u uslovima niskocikličnog zamora (LCF), sa

kontrolisanom i potpuno reverzibilnom deformacijom ( /2 = const, R = min/

max = -1). Ispitivanja niskocikličnog zamora obavljena su na seriji glatkih

epruveta od čelika Nionikral 70 (NN-70), sa poluamplitudom kontrolisane

deformacije, /2=0.35, 0.45, 0.50, 0.60, 0.70 i 0.80. Za izbor stabilizovanih

histereza i obradu rezultata ispitivanja niskocikličnim zamorom, korišćene su

preporuke standarda ISO 12106:2003 (E) i ASTM E 606-04, kao i dve nove

metode: Metoda sredine stabilizacije (MSS) i Metoda praga NDT (MpNDT),


što u ovom radu predstavlja četiri rezultata za poređenje. Za svaki nivo

deformacije izabrane su karakteristične stabilizovane histereze, određene prema

preporuci standarda ISO 12106:2003 (E) i ASTM E 606-04, MSS i MpNDT, sa

kojih su očitani potrebni podaci za dalju obradu rezultata i konačno,

konstruisanje karakterističnih krivih niskocikličnog zamora. Konstruisane krive

su međusobno poređene, a ocenjen je uticaj izbora karakterističnih

stabilizovanih histereza na karakterizaciju ponašanja čelika NN-70. Rezultati

eksperimentalnih ispitivanja su nam dali važne podatke o razumevanju

zamornog ponašanja čelika NN-70. U radu je izvršeno i poređenje rezultata

statičkog i dinamičkog, odnosno monotonog i zamornog ponašanja materijala,

što predstavlja praktični doprinos oceni ponašanja čelika NN-70 u uslovima

delovanja niskocikličnog zamora.

Ključne reči: HSLA, NN-70, LCF, ISO, ASTM, MSS, MpNDT.



T 002

CONSTRUCTION

TECHNOLOGY

T 002

GRAĐEVINSKA

TEHNOLOGIJA




ODLUKOM (M24)

D. Bojović, B. Aranđelović, K. Janković, A. Senić, M. Stojanović

DETERMINATION OF THE IN-SITU COEFFICIENT OF FRICTION

AND IMPERFECTION OF PRESTRESSING CABLES

Građevinski materijali i konstrukcije, Vol. 60, No. 2, 2017, 49-56

Prestressing structural elements allows an increase in the spans of reinforced

concrete structures. In the design and dimensioning of prestressed reinforced

concrete structures it is necessary to know, that is to adopt a number of

parameters which are empirically determined. Determining the level of the

tension force of the cables is of primary importance for prestressed structures.

The level of tensioning force, in addition to other parameters, greatly depends

on the friction coefficient of cables and the imperfection coefficient of

execution. These coefficients are defined by standards for the design or by the

manufacturer of the prestressing system. The coefficients are defined in wide

ranges, while for the design, the knowledge of the most accurate values is

necessary in order to obtain a good design and cheaper structures. Through

experimental work in-situ the range of the values of the coefficient of friction of

cables is determined and compared with ranges defined by the standard.

Keywords: prestressing, coefficient of friction, coefficient of imperfection.




Z. Radojević, M. Vasić, V. Milošević

PRIKAZ RAZLIČITIH METODOLOGIJA ISPITIVANJA KLIZAVOSTI

KERAMIČKIH PLOČICA



75-81.

U Srbiji poslednjih godina traje proces usaglašavanja sa EU tehničkom

regulativom vezanom za zahteve za stavljanje proizvoda na tržište. Zahtevi za

građevinske proizvode i objekte iz Uredbe 305/11 prevashodno se odnose na

bezbednost. Objekti kao celine i njihovi sastavni delovi moraju da odgovaraju

svojoj predviđenoj nameni, uzimajući u obzir zdravlje i bezbednost ljudi tokom

čitavog životnog ciklusa tih objekata. Jedan od zahteva koji se postavlja za

podove uključujući i podove obložene keramičkim pločicama se odnosi na

otpornost prema klizanju. U ovom radu su prikazane četiri metode, definisne u

odgovarajućim prilozima standarda CEN/TS 16165, koje se odnose na

utvrđivanje otpornosti prema klizanju. Metodu prikazanu u prilogu A treba

koristiti za ispitivanje podnih obloga koje koriste pešaci koji hodaju bosi.

Metode prikazane u prilozima B, C i D treba koristiti za ispitivanje podnih

obloga koje mogu biti suve/ili mokre a koje koriste pešakaci koji hodaju

obuveni. U radu su dodatno predstavljeni i kriterijumi za ocenu otpornosti

prema klizanju podnih obloga, na osnovu kojih se oni razvrstavaju u

odgovarajuće kategorije.

Ključne reči: keramičke pločice, klizavost, dinamički koeficijent trenja.



P 420

PETROLOGY,

MINERALOGY,

GEOCHEMISTRY

P420

PETROLOGIJA,

MINERALOGIJA,

GEOHEMIJA




I. Delić-Nikolić, L. Kurešević, O. Vušović

KOSJERIĆ DIABASE AS BUILDING STONE

1st International Conference on Construction Materials for Sustainable Future,

Zadar, Croatia, 2017, 140-145.

Diabase is an old name for a magmatic effusive and vein rock, which is

regarded a highly-prized building material due to its good technical properties.

It has high values of compressive strength and abrasion resistance, small water

absorption and it is resistant to frost impact. Despite all this, in Serbia, diabase

did not receive the deserved attention as a building material. Thorough

geological exploration performed in the period from 2003 to 2009 in six

locations in the territory around Kosjerić (western Serbia) aimed to prove

geological reserves and quality of diabase rocks, mostly for use as an aggregate

in road-construction. All explored localities are situated on Maljen Mt. and

belong to diabase-chert formation (ophiolitic melange) of the Mesozoic age.

Ophiolitic melange is situated within the chain of Podrinje-Valjevo mountains,

formed in the unstable geologic structure together with other basic and

ultramafic rocks, and contemporaneous with surrounding sedimentary

formations. Most often, diabase forms large masses of submarine effusions, up

to several hundred meters thick. These masses most often are trending NW-SE.

Conducted exploration works found that the rock mass is homogeneous and

sound in all localities, although with dense joint networks filled with white

quartz veins, or rarely with calcite veins. The exploration works included

numerous laboratory examinations of petrological and technical properties.

These have shown that the main minerals belong to plagioclase and pyroxene

groups. Subordinate components are opaque minerals and, rarely, quartz.

Chlorite, epidote and calcite have formed as secondary minerals in various

alteration processes. Rock texture is most often ophitic, and the structure

homogeneous. Testing of the technical properties has proved high quality of the

stone from these localities and its possibility of use as a building material. The

presence of two colour varieties is detected: dark grey and dark green. However,

no differences in the technical properties of the two varieties have been found.


Keywords: diabase, Kosjerić, building stone.

I. Delić-Nikolić, O. Vušović, L. Kurešević

TESTING OF STONE FROM THE FACADE OF THE CATHEDRAL OF

SAINT TERESA IN SUBOTICA



Saint Teresa cathedral in Subotica is built by the end of the 18th century, and has

since suffered significant damage. One of the damage types is the intense decay

of the plinth mortar, which led to outcropping of the light-coloured stone the

plinth is built from. This stone has been examined as part of the restoration

process on this cathedral, aiming to determine the state of the building materials

used for building the cathedral. These examinations included the visual

examination of the stone, in situ determination of the water absorption via

Karsten tubes, sampling for laboratory examinations and the laboratory

examinations: petrographic analysis and determination of the chosen physical

properties. We provide conclusions based on the results of all the cited

examinations.

Keywords: cathedral, facade, Subotica, stone testing.


RAD U VODEĆEM ČASOPISU

NACIONALNOG ZNAČAJA (M51)

L. Kurešević, O. Vušović, I. Delić-Nikolić

GEOLOGY OF GEMSTONE DEPOSIT UGLJAREVAC (CENTRAL

SERBIA) AND CONTRIBUTIONS TO GENETIC MODEL

Geologica Macedonica, Vol. 31, No. 1, 2017, 67-76.

Silica gemstone deposit Ugljarevac is situated within the ophiolite sequence of

the Vardar zone central deep fault. Genetic processes of this deposit are

connected to the Neogene calc-alkaline magmatic activity of the Vardar zone

and hydrothermal activity triggered by it. Based on surface occurrences of

listwenitized serpentinite containing silica mineralization, it can be inferred that

the ore body is an elongated oval stock. Within the stock of hydrothermally

altered serpentinite, the gemstone mineralization occurs as veins, stockworks

and irregular bodies.

Present gemstone types include chalcedony varieties (jasper, colourless and

greenish chalcedony, carnelian and sard) and opal (opalized serpentinite).

Homogenous pieces are very rare. Most often, various types of silica are

intimately intermixed and combined. The mineralization has formed in two

distinct hydrothermal phases, apparently in close time succession. Jasper and

coloured chalcedony (and rare magnesite) are the products of the first phase of

hydrothermal activity, while the colourless chalcedony is formed in the second

phase. Newly discovered type of silica vein with central-symmetrical parallel

banding gives new contributions to a genetic model, proving the precipitation

process and its products are unpredictably changeable, heterogeneous and

depending on the evolution of the local environment physico-chemical

conditions, notably the contents of impurities and system's openness degree.

Keywords: gemstone; silica veins; jasper; chalcedony; central Serbia.


DOCTORAL DISSERTATIONS DOKTORSKE DISERTACIJE


J. Ćirilović

INTEGRISANI MODEL UPRAVLJANJA FLEKSIBILNIM

KOLOVOZIMA NA NIVOU MREŽE

Doktorska disertacija odbranjena na Građevinskom fakultetu Univerziteta u

Beogradu 2017. godine

Poslednjih godina, preduzeća koja se bave održavanjem putne infrastrukture, na

državnom i lokalnom nivou, se suočavaju sa novim zahtevima kada je reč o

održavanju puteva. Pored potrebe da se smanje ukupni troškovi održavanja

putne mreže i usklade sa realnim mogućnostima i raspoloživim budžetom, i da

se u isto vreme obezbedi održavanje putne mreže u odgovarajućem i stabilnom

stanju, preduzeća koja upravljaju putnom infrastrukturom se nalaze pred još

zahtevnijim izazovom, a to je uključivanje klimatskih promena i uticaja na

životnu sredinu u proces odlučivanja. Mnoge studije i istraživački projekti su

istraživali uticaj stanja kolovoznog zastora na potrošnju goriva i troškove

održavanja. Rezultati pokazuju da bi održavanje kolovoza, na nivou putne

mreže, na najnižem nivou ravnosti smanjilo potrošnju goriva i rezervnih delova

vozila, što je takođe korisno i za životnu sredinu. S druge strane, intenzivni

radovi održavanja, koji su neophodni kako bi putevi bili u odličnom stanju

ravnosti, praćeni su značajnim emisijama i negativnim uticajem na životnu

sredinu. Cilj ovog istraživanja je bio da se integrišu model procene troškova,

optimizacioni model održavanja i modeli uticaja na životnu sredinu, kako bi se

adekvatno odgovorilo savremenim zahtevima, koji uključuju razvoj i primenu

strategija koje nisu samo ekonomski, već i ekološki održive. Primenjen

optimizacioni model je zasnovan na metodi „exhaustive search“, a kasnije je

primenjena višekriterijumska optimizacija sa upotrebom genetskih algoritama,

dok su modeli procene troškova razvijeni korišćenjem regresione analize,

stabala odlučivanja i veštačkih neuronskih mreža. Razvijena metodologija

nalazi optimalan plan održavanja putne mreže R Srbije, tj rešenje koje je i

ekonomski i ekološki opravdano. Međutim, primenjena metodologija može lako

da se primeni na bilo koju drugu putnu mrežu širom sveta.

Ključne reči: Održavanje puteva, asfaltni kolovozi, strategije održavanja,

metode optimizacije, metode procene troškova, putna mreža, emisije ugljen

dioksida.


D. Bojović

PARAMETARSKA ANALIZA NOSIVOSTI ANKERA NA ZATEZANJE

I SMICANJE U MIKROARMIRANOM BETONU VEOMA VISOKIH

ČVRSTOĆA FAKTORIJALNOM ANALIZOM I NEURONSKIM

MREŽAMA

Doktorska disertacija odbranjena na Fakultetu tehničkih nauka Univerziteta u

Novom Sadu 2017. godine

Beton kao materijal u upotrebi je već više od jednog veka. Od nastanka do

danas razvijeni su različiti dodaci betonu koji su omogućili dobijanje različitih

vrsta betona. Razvojem hemijskih dodataka omogućeno je da se odnos vode i

cementa u betonu smanji na veoma nizak nivo. Kombinacijom određenih

komponentnih materijala i novih hemijskih dodataka mogu se dobiti betoni

visokih čvrstoća. Primenom mikrovlakana i posebnih tehnika nege u takvim

betonima omogućeno je dobijanje značajno većih čvrstoća. Takvi betoni se još

nazivaju betoni veoma visokih čvrstoća. Ovako dobijeni betoni omogućavaju

manje dimenzije konstrukcijskih elemenata, ali je njihova proizvodnja

neizbežno vezana za fabričke pogone. Njihovo spajanje na gradilištu je

najjednostavnije pomoću ankera koji se postavljaju tokom proizvodnje ili

naknadno.

Na početku izrade disertacije izvršen je detaljan pregled i analiza dostupne

literature i rezultata istraživanja iz oblasti betona veoma visokih čvrstoća i

ispitivanja ankera. Ova analiza data je u teorijskom delu disertacije.

Prvi deo eksperimentalnog istraživanja obuhvatio je dobijanje mikroarmiranih

betona veoma visokih čvrstoća. Na betonima veoma visokih čvrstoća

proizvedenim u laboratorijskim uslovima ispitane su osnovne

fizičko‐mehaničke karakteristike. Napravljene su četiri vrste betona i za svaku

vrstu preko 70 uzoraka za ispitivanje svojstava betona veoma visokih čvrstoća.

Nakon toga formirani su uzorci za ispitivanje nosivosti ankera. I to 144

betonska uzorka u kojima su prethodno ugrađeni ankeri i 144 betonska uzorka u

kojima su naknadno ugrađeni ankeri sa "SIKA" materijalima.

Za ispitivanje nosivosti ankera na zatezanje primenjena je standardna metoda,

dok je za ispitivanje nosivosti ankera na smicanje primenjena interna metoda.


Na osnovu dobijenih rezultata ispitivanja formirane su baze podataka. Analiza

rezultata ispitivanja obuhvatila je sve pojedinačne rezultate i definisanje

zavisnosti između nosivosti ankera na zatezanje i smicanje i variranih

parametara.

Radi egzaktnog utvrđivanja pojedinačnog uticaja analiziranih parametara, kao i

njihovog kombinovanog uticaja, pored standardnih statističkih numeričkih

analiza, primenjena je i analiza pomoću faktorijalnog eksperimenta, kao i

analiza primenom neuronskih mreža.

Zaključeno je da oba pristupa imaju svoje prednosti. Rezultati koji su dobijeni

pokazuju podudaranja u pojedinim delovima. Zbog načina obrade

podataka u različitim pristupima postoje i značajne razlike među njima.

Ključne reči: beton veoma visokih čvrstoća, ankeri, faktorijalna analiza i

neuronske mreže.


ORGANIZATION

OF CONFERENCES ORGANIZACIJA

STRUČNIH SKUPOVA


MEĐUNARODNI SIMPOZIJUM

O ISTRAŽIVANJIMA I PRIMENI SAVREMENIH DOSTUGNUĆA

U GRAĐEVINARSTVU U OBLASTI MATERIJALA I KONSTRUKCIJA

I XXVII KONGRES DIMK

Vrsac, 18 – 20.10.2017.

Organizatori

Institut IMS Beograd

Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije

Osnovni cilj Simpozijuma je da se stručnoj javnosti, kroz prijavljene referate,

saopšte rezultati aktuelnih istraživanja u Srbiji i zemljama regiona, kao i da se

proceni mogućnost praktične primene novih naučnih dostignuća u oblasti

građevinarstva.

Programski odbor koji je formirala Skupština DIMKS, predvideo je da Kongres

traje 3 dana po sledećim tematskim oblastima:

Istraživanja na području materijala i njihove primene;

Teorijska i eksperimentalna analiza konstrukcija;

Projektovanje i građenje objekata;

Aseizmičko projektovanje i građenje;

Održavanje i sanacija građevinskih objekata;

Materijali, konstrukcije i životna sredina;

Energetska efikasnost građevinskih objekata;

Građevinsko-tehnička regulativa i sistem kvaliteta;

Upravljanje projektima u građevinarstvu.


SEDMO NAUČNO-STRUČNO MEĐUNARODNO SAVETOVANJE

GEOTEHNIČKI ASPEKTI GRAĐEVINARSTVA

Šabac, 14 – 17.11.2017.

Organizatori


Savez građevinskih inženjera Srbije

Srpsko društvo za mehaniku tla i geotehničko inženjerstvo

SET d.o.o. Šabac

Savetovanje je imalo cilj da ukaže na orijentaciju glavnih pravaca razvoja ove

struke, koji treba da odgovaraju uslovima i potrebama u ovoj fazi izgradnje naše

zemlje.

Pored toga to je bila prilika da se razmotri i stanje naše regulative u ovoj oblasti

i potreba njenog usaglašavanja sa najnovijim dokumentima evrokodova koji se

odnedavno primenjuju u zemljama Evropske unije.


DESETO NAUČNO-STRUČNO MEĐUNARODNO SAVETOVANJE

OCENA STANJA, ODRŽAVANJE I SANACIJA GRAĐEVINSKIH

OBJEKATA I NASELJA

Vršac, 14 – 16.6.2017.

Organizatori


Savez građevinskih inženjera Srbije

GP Rasing d.o.o. Vršac

Široka razmena iskustava stručnjaka različitih profila: građevinskih inženjera

različitih smerova, geotehničara, arhitekata, urbanista, prostornih planera,

ekonomista, pravnika i ostalih stručnjaka koji rade u graditeljstvu na pregledu,

ispitivanju i proceni stanja objekata i na projektovanju i izvođenju radova u

oblasti održavanja i sanacije građevinskih objekata i naselja.

Specifični geotehnički i seizmološki problemi naše zemlje i Balkana, socio-

ekonomski odnosi u društvu i drugi faktori, doveli su do zaostajanja za

razvijenim zemljama u oblasti tretmana postojećeg graditeljskog fonda.

To je nametnulo potrebu razvoja metodologija za procenu stanja postojećih

objekata i naselja, za izbor adekvatnog pristupa održavanju, sanaciji i

rekonstrukciji građevinskih objekata i naselja, uz uključivanje optimizacionih i

informacionih sistema u ove oblasti.


RESEARCH PROJECTS

FINANCED BY THE

MINISTRY OF EDUCATION,

SCIENCE AND

TECHNOLOGICAL

DEVELOPMENT

NAUČNI PROJEKTI

FINANSIRANI OD STRANE

MINISTARSTVA

PROSVETE, NAUKE

I TEHNOLOŠKOG

RAZVOJA


NAUČNI PROJEKTI

FINANSIRANI OD STRANE MINISTARSTVA PROSVETE, NAUKE

I TEHNOLOŠKOG RAZVOJA

TEHNOLOŠKI RAZVOJ

Ev.

broj

Naziv projekta

35002 Razvoj novih metodologija

revitalizacje turbinske i

hidromehaničke opreme

hidroelektrana u zavisnosti od

uzroka degradacije materijala

Dr Miodrag Arsić,

rukovodilac projekta


Dr Zoran Odanović

36014 Geotehnički aspekti istraživanja

i razvoja savremenih tehnologija

građenja i sanacija deponija

komunalnog otpada

Dr Nenad Šušić,

rukovodilac projekta

Dr Ksenija Đoković

Bojan Ćosić

Jelena Ćirilović

36017 Istraživanje mogućnosti primene

otpadnih i recikliranih materijala

u betonskim kompozitima, sa

ocenom uticaja na životnu

sredinu, u cilju promocije

održivog građevinarstva u Srbiji

Dr Aleksandra Mitrović

Dr Ksenija Janković

Mr Dragan Bojović

Ljiljana Lončar

Marko Stojanović

35011 Integritet opreme pod pritiskom

pri istovremenom delovanju

zamarajućeg opterećenja i

temperature

Dr Dejan Momčilović

Mr Vujadin Aleksić


35006 Održivost i unapređenje

mašinskih sistema u energetici i

transportu primenom

forenzičkog inženjerstva, eko i

robust dizajna

Dr Miodrag Arsić

35029 Razvoj metodologija za

povećanje radne sposobnosti,

pouzdanosti i energetske

efikasnosti mašinskih sistema u

energetici

Dr Dejan Momčilović

35040 Razvoj savremenih metoda

dijagnostike i ispitivanja

mašinskih struktura

Željko Flajs

INTEGRALNA I INTERDISCIPLINARNA ISTRAŽIVANJA

Ev.

broj

Naziv projekta

45008 Razvoj i primena

multifunkcionalnih materijala na

bazi domaćih sirovina

modernizacijom tradicionalnih

tehnologija

Dr Zagorka Radojević

Dr Anja Terzić

Dr Milica Arsenović

Dr Miloš Vasić

Ljiljana Miličić

Ivana Delić


OSNOVNA ISTRAŽIVANJA

Ev.

broj

Naziv projekta

186010 Minerali Srbije: sastav, struktura,

geneza, primena i doprinos

održanju životne sredine

Dr Snežana Dević

172005 Uticaj nano i mikrostrukturnih

konstituenata na sintezu i

karakteristike savremenih

kompozitnih materijala sa

metalnom osnovom

Dr Zoran Odanović

174004 Mikromehanički kriterijumi

oštećenja i loma


172057 Usmerena sinteza, struktura i

svojstva multifunkcionalnih

materijala

Dr Anja Terzić


SELECTED

BUSINESS REFERENCES ODABRANE

STRUČNE REFERENCE


U ovom odeljku dat je pregled ključnih usluga koje je Institut IMS izvršio u

2017. godini.

U skladu sa multidisciplinarnom organizacijom Instituta, usluge obuhvataju

izradu investiciono-tehničke dokumentacije, ispitivanja na terenu i u

laboratorijama, stručni nadzor nad izvođenjem radova, studije, ekspertize i

drugo u praktično svim oblastima građevinarstva, mašinske industrije i

energetike.

Pregled referenci je dat po organizacionim celinama.


THE CENTRE

FOR MATERIALS CENTAR

ZA MATERIJALE


CENTAR ZA MATERIJALE

Laboratorija za građevinsku keramiku

R.b. Referenca Investitor

1. Elaborat o oceni kvaliteta keramičkih glina

sa ležišta Brezaci i preporukama za primenu

u proizvodnji keramičkih pločica

KAOLIN a.d.

Valjevo

2. Elaborat o oceni kvaliteta opekarske sirovine

sa lokacije Zagorica, sa preporukama

receptura za primenu u ciglani u

Aranđelovcu

Univerzum-Kubršnica

a.d.

Aranđelovac

3. Elaborat o oceni kvaliteta opekarske sirovine

sa ležišta Crne bare-srednja strana crepane

IGM Polet, Novi Bečej

IGK Polet a.d.

Novi Bečej

4. Projekat optimizacije sirovinskih mešavina

za proizvodnju energetskih blokova u ciglani

MLADOST TMP, Mala Plana

MLADOST TMP,

Mala Plana

5. Studija o rezultatima dijagnosticiranja

temperaturnog režima rada tunelske peći sa

U kasetama, sa preporukama za optimizaciju

procesa pečenja u crepani DILJ d.o.o.

Vinkovci, Hrvatska

IGM DILJ d.o.o.

Vinkovci, Hrvatska

6. Studija o rezultatima dijagnosticiranja

temperaturnog režima rada tunelske peći,

sa preporukama za optimizaciju procesa

pečenja u crepani IGM Toza Marković,

Kikinda

IGM Toza Marković,

Kikinda


Laboratorija za akustiku i vibracije


1. Praćenje nivoa buke na teritoriji grada

Novog Sada, jul 2016 – jun 2017.

Grad Novi Sad,

Gradska uprava za

zaštitu životne sredine

2. Merenje nivoa buke u životnoj sredini duž

predložene trase budućih dalekovoda DV

2x400kV Bajina Bašta – granica BIH /

Višegrad – TS Požega i DV 400kV TS

Požega – TS Kraljevo 3

Mott MacDonald IPF

III Consortium,

Beograd

3. Merenje nivoa buke u životnoj sredini na

lokaciji KBC Bežanijska kosa u Beogradu

pre i posle postavljanja zvučnih barijera

CPG d.d.

Beograd

4. Merenje nivoa buke u životnoj sredini na

lokaciji Gradski zavod za hitnu medicinsku

pomoć u Beogradu pre i posle postavljanja

zvučnih barijera

CPG d.d.

Beograd

5. Merenje nivoa buke u životnoj sredini u zoni

uticaja kamenoloma Krst i duž trase puta

kojim se vrši transport kamenih agregata u

naselju Prijezdić kod Valjeva

Kamen desetka d.o.o.

Beograd

6. Merenje nivoa buke u životnoj sredini duž

predložene trase budućeg dalekovoda DV

2x400kV TS Bajina Bašta – TS Obrenovac

ENERGOPROJEKT

ENTEL a.d.

Beograd

7. Kontrolna merenja nivoa buke na teritoriji

grada Beograda, 2016 – 2017.

Grad Beograd,

Gradska uprava grada

Beograda,

Sekretarijat za

inspekcijske poslove


8. Merenje nivoa buke u životnoj sredini u

okolini lokacije TE Kolubara A, Veliki

Crljeni

JP Elektroprivreda

Srbije, Beograd


okolini lokacije TENT A, Obrenovac

JP Elektroprivreda

Srbije, Beograd


okolini lokacije TENT A, Obrenovac

JP Elektroprivreda

Srbije, Beograd

11. Veliki broj standardnih merenja nivoa buke,

zvučne izolacije i zvučne apsorpcije na

terenu i u laboratoriji

Laboratorija za kamen i agregat

R.b. Referenca

1.

Laboratorijska ispitivanja uzoraka tehničkog i arhitektonskog kamena,

šljunka i peska u cilju realizacije geoloških istraživanja ležišta

2. Ispitivanje tehničkog i arhitektonskog kamena, ispitivanje kamenih

agregata, atestiranje kamenih agregata, ispitivanje na prisustva azbesta

3. Ispitivanje materijala sa kulturno-istorijskih spomenika:

istorijski malter sa tvrđave Novo brdo, Kosovo i Metohija,

istorijski malter sa manastira Treskavac u Makedoniji,

istorijski malter sa zgrade Jugoeksporta u Kolarčevoj ulici

u Beogradu,

istorijski malter sa zgrade Starog načelstva u Požarevcu,

kamen ugrađivan u objekte od istorijskog značaja:

dečija klinika uTiršovoj ulici u Beogradu, Kalenić pijaca u Beogradu,

zgrada Starog načelstva u Požarevcu i dr.


Laboratorija za beton


1.

Završne ocene kvaliteta betona za objekte

izvedene u Srbiji

Širbegović grupa –

GMT Konstrukcije,

Gračanica, BiH

2. Kontrola kvaliteta ugrađenih materijala

tokom izvođenja radova na autoputu E-80,

deonica Čiflik-Staničenje

Construcctiones Rubau

– Ogranak Niš

3. Kontrola kvaliteta betona na gradilištu

Paralelni put Bela Palanka – Pirot

Ferbild

4. Tekuća kontrola kvaliteta betona na

gradilištu Autoput E-763, deo 3:

Obrenovac – Ub

China Shandong

International Economic

& Technical,

Ogranak Beograd

5. Kontrola kvaliteta materijala na

građevinskom objektu: izgradnja autoputa

E-75, deonica LOT 3 – tunel Predejane i

LOT 4 – tunel Manajle

Euro Alliance Tunnels

JSC

– Ogranak Beograd

6. Kontrola kvaliteta na deonici autoputa E-75

Grdelica – Caričina Dolina Azvi

7. Kontrola kvaliteta na deonici autoputa E-75

Caričina Dolina – tunel Manajle Ogranak Prijedor-

putevi B Beograd

8. LOT B3.2 Izgradnja Ostružničkog mosta

u konzorcijumu sa UTIBER, Mađarska

JP Putevi Srbije

9. Završne ocene kvaliteta betona za objekte

izvedene u Srbiji

Baupartner,

Lukavac, BiH


10. Nezavisna laboratorija za ispitivanje betona

na izgradnji Autoputnog pravca E75,

Deonica: Grdelica (gornje Polje) – Caričina

Dolina, LOT2: Put i mostovi od Tunela

Predejane do Caričine Doline

Trace

– Ogranak Beograd

11. Ispitivanje betona na mostu preko Save

od stacionaže km 22+516 do km 24+097

China communications

Construction Company

LTD.

Ogranak Beograd

– Savski venac

12. Kontrola kvaliteta na objektu Vetropark

Čibuk 1 – Dolovo CJR


THE CENTRE

FOR METALS

AND ENERGETICS

CENTAR

ZA METALE

I ENERGETIKU


CENTAR ZA METALE I ENERGETIKU

Laboratorija za ispitivanje metala

Kontrolno telo

Laboratorija za etaloniranje mehaničkih veličina


1. Fabrički prijem opreme od strane instituta

pri izradi i sanaciji delova hidroagregata

u fabrici LMZ, Silovie Mašini, Rusija

JP EPS BEOGRAD

Ogranak HE Đerdap

HE Đerdap 1 Kladovo

2. Ispitivanje mašinske opreme JP EPS BEOGRAD

Ogranak HE Đerdap

HE Đerdap 1 Kladovo

3. Ispitivanje opreme bez razaranja HMO

– HE PIROT

JP EPS BEOGRAD

Ogranak HE Đerdap

HE Pirot, Pirot

4. Ispitivanje materijala sa razaranjem JP EPS BEOGRAD

Ogranak RB Kolubara

Kolubara metal,

Lazarevac

5. Ispitivanje glavnih parovodnih linija RA,

RB i RC i ispitivanje prestrujnih parovoda

metodama bez razaranja za 2017.

TENT A, blokovi A1, A2 i A6

JP EPS BEOGRAD

Ogranak TE Nikola

Tesla A, Obrenovac

6. Ispitivanje turbinske opreme

Ispitivanje NDT metodama (lopatice,

vretena, ležajevi...) za remont 2017.

blokovi A1, A2, A3,A5 i A6

JP EPS BEOGRAD

Ogranak TE Nikola

Tesla A, Obrenovac


7. Ispitivanje metodama bez razaranja opreme

agregata, hidromehaničke opreme i uređaja

na nivou ogranka DLHE

– HE Elektromorava

JP EPS BEOGRAD,

Ogranak Drinsko

Limske HE – Bajina

Bašta – OJ HE

Elektromorava Čačak

8. Ispitivanje metala sa i bez razaranja JP EPS BEOGRAD

Ogranak TE KO

Kostolac, Kostolac

9. Ispitivanje preostalog radnog veka ventila

koji rade u kritičnim uslovima – TENT A

JP EPS BEOGRAD

Ogranak TE Nikola

Tesla A, Obrenovac

10. Priprema i ispitivanje stanja materijala na

bloku 6

JP EP Bosne i

Hercegovine d.d.

Sarajevo

11. Ispitivanja metodama bez razaranja na

opremi koja je vlasništvo Elektroprivrede

BiH, a nalazi se u fabrici Đuro Đaković

– Strojna obrada d.o.o. Slavonski Brod,

Republika Hrvatska

Tehnopetrol d.o.o.

Tuzla

12. Ispitivanje kvaliteta čelične konstrukcije

hladnjače Ledo metodama bez razaranja i

ispitivanje metodama sa razaranjem

Ledo d.o.o.

Podgorica

13. Ispitivanje hemijskog sastava i mehaničkih

osobina materijala

Thyssenkrupp

Materials d.o.o. Inđija

Proleter a.d. Metalska

industrija, Arilje

Paffoni d.o.o.

Mladenovac

Manet d.o.o. Beograd

Aqua Mont Service

d.o.o. Beograd


14. Ispitivanje betonskog čelika Metalfer Steel Mill

d.o.o. Sremska

Mitrovica

Eurokomerc-Company

d.o.o. Bujanovac ,

Komerc-Mali d.o.o.

Prnjavor

Strabag, d.o.o.

Beograd

15. Ispitivanje mehaničko-tehnoloških osobina

vijaka, navrtki i podloški

Markant, Valjevo

DIV betonski pragovi,

Svrljig

16. Ispitivanja proizvoda od gvožđa i čelika

(armatura, užad za prednaprezanje, cevi...)

Ogranak Terna S.A.

Serbia, Beograd

JP za podzemnu

eksploataciju uglja,

Resavica

Aktor A.T.E,

Ogranak Beograd

AD Putevi, Užice



17. Etaloniranje uređaja za merenje mehaničkih

veličina

EPS Beograd,

Ogranak RB Kolubara,

Poliester, Priboj,

La Farge, Beočin,

Azvirt, Beograd,

Železara Smederevo,

JAT Tehnika, Beograd,

Lasta, Beograd,

Energoprojekt

niskogradnja, Beograd,

Elita – Cop d.o.o.

Zemun,

Hemofarm a.d. Vršac,

GP Mostogradnja a.d.

Beograd


THE CENTRE

FOR ROADS

AND GEOTECHNICS

CENTAR

ZA PUTEVE

I GEOTEHNIKU


CENTAR ZA PUTEVE I GEOTEHNIKU

Nadzor Investitor

1. Nadzor na deonici LOT B3 izgradnja mosta br.8

preko reke Save kod Ostružnice, Obilaznica oko

Beograda

JP Putevi Srbije

2. Geodetski nadzor tokom građevinskih radova na

izgradnji deonice koridora XI, Surčin-Obrenovac

Falcon Survey

d.o.o.

Dinamičko ispitivanje šipova - DLT metoda Investitor

1. Izveštaj o ispitivanju šipova sa čeličnom

kolonom metodom DLT za objekat –

Obaloutvrde, kaskadne terase, lokacija Beograd

na vodi, Beograd

Millenium Team

d.o.o. Beograd

2. Izveštaj ispitivanje šipova P15 i P3 sa čeličnom

kolonom metodom DLT za objekat –

Obaloutvrda na desnoj obali reke Save od km

1+000 do km 3+000 (Brezov mol), lokacija

Beograd na vodi, Beograd

Millenium Team

d.o.o. Beograd

3. Izveštaj o ispitivanju nosivosti šipova

dinamičkim probnim opterećenjem (DLT) na

trgu Slavija, u Beogradu

Geosonda

Fundiranje a.d.

Beograd

4. Izveštaji I i II o ispitivanju nosivosti šipova

dinamičkim probnim opterećenjem (DLT) za

temelje vetroturbine na lokaciji Vetroparka

Malibunar VG 24 i VG 25

Geosonda

Fundiranje a.d.

Beograd


5. Izveštaji I i II o ispitivanju nosivosti šipova

dinamičkim probnim opterećenjem (DLT) za

fabriku Mitas, u Rumi

Geosonda

Fundiranje a.d.

Beograd

6. Izveštaj o ispitivanju nosivosti šipa dinamičkim

probnim opterećenjem (DLT) za fabriku Patent

Co, u Mišićevu

Geosonda

Fundiranje a.d.

Beograd

7. Izveštaj o ispitivanju nosivosti šipa dinamičkim

probnim opterećenjem (DLT) za: maloprodajni

objekat Lidl, f0123 Ada – Beograd

ENERGOGROUP

d.o.o. Beograd

Ispitivanje integriteta šipova - SIT metoda

1. Izveštaj o ispitivanju integriteta šipova metodom

Sonic Integrity Testing SIT (u svemu prema:

ASTM D5882) za objekat Plot 18, Beograd na

vodi

STRABAG d.o.o.

2. Izveštaj o rezultatima ispitivanja integriteta

šipova metodom SONIC INTEGRITY

TESTING (SIT) za Potporni zid S3 – šipovi 53-

64 i 114-116 i Potporni zid S2 – šipovi 166-

170,na Koridoru H, LOT 5: Putevi i mostovi na

poddeonici Caričina dolina – Tunel Manajle

Ogranak Prijedor

putevi

3. Izveštaji I i II o ispitivanju integriteta šipova

metodom SONIC INTEGRITY TESTING SIT

(u svemu prema: ASTM D5882) za objekat:

most 17 Jabuka i Most 14 Uvač, Autoput Bar –

Boljare,Deonica Smokovac – Mateševo

ABG TEST d.o.o.

Podgorica,

Crna Gora

4. Izveštaj o ispitivanju integriteta šipova metodom

Sonic Integrity Testing SIT (u svemu prema:

ASTM D5882) za: Most 3, stubno mesto P5R na

autoputu E-75, LOT 1, deonica: Grdelica

(Gornje Polje) – Predejane (Caričina Dolina)

AZVI S.A.

Ogranak Novi Sad


5. Izveštaj o rezultatima ispitivanja integriteta

šipova metodom SONIC INTEGRITY

TESTING (SIT) za Potpornu konstrukciju na

desnoj traci državnog IB br.24 Batočina –

Kragujevac od km 13+423.00 do km 13+498.50

Preduzeće za

puteve Kragujevac

d.o.o.

Statičko ispitivanje šipova - SLT metoda

1. Izveštaj o ispitivanju test VG 24 franki šipa

metodom statičkog probnog opterećenja za

temelje vetrotubina – VG 24,na lokaciji

Vetroparka Malibunar

Geosonda

Fundiranje a.d.

Beograd

2. Izveštaj o ispitivanju šipova dinamičkim i

statičkim probnim opterećenjem za objekat

ʺNeltʺ, u Dobanovcima

Geosonda

Fundiranje a.d.

Beograd



temelje vetrotubina – VG 22, na lokaciji

vetroparka Košava, Izbište

Geosonda

Fundiranje a.d.

Beograd



temelje vetroturbina – VG 7,14, i 20 na lokaciji

vetroparka Alibunar

Geosonda

Fundiranje a.d.

Beograd

5. Izveštaj o ispitivanju franki šipa ø 600 mm

opitom statičkog probnog opterećenja

vertikalnom silom pritiska za objekat:

Postrojenje za prečišćavanje otpadnih voda, u

Vrbasu

Javornik d.o.o.

Subotica



Projekti sanacije klizišta

1. Projektno-tehnička dokumentacija za sanaciju

klizišta – oštećenja nasipa trupa puta na

državnom putu IB-23, deonica br. 02328, Nova

Varoš - Bistrica, km 220+850

JP Putevi Srbije


klizišta – oštećenja kolovoza i nasipa na

državnom putu IB-22, deonica br. 02212,

Dudovica – Poljanice, km:63+125 - km:63+323

JP Putevi Srbije


klizišta – nestabilne kosine useka na državnom

putu IA-1, deonica br. 1089, Pojate-Ražanj, uža

lokacija Mečka, km:382+350

JP Putevi Srbije


klizišta–nasipa trupa puta,na državnom putu IB-

22, deonica br. 02234, Novi Pazar (Brđani)-

Ribariće, u mestu Orlje,km:276+480

JP Putevi Srbije


klizišta – oštećenja betonske potporne

konstrukcije na državnom putu IB-23,

deonica br. 02317: Pakovraće (Markovica) –

Kratovska stena, km: 104+068

JP Putevi Srbije


klizišta - oštećenja nasipa trupa puta na

državnom putu IB-23, deonica puta br. 02328,

Nova Varoš – Bistrica, km: 209+850

JP Putevi Srbije



Geotehnički elaborati


1.

Geotehnički elaborat o uslovima izgradnje

fabrike za kompletiranje streljačke, sportske

i lovačke municije u Užicu, KP 743/1, KO

Ljubanje

Prvi partizan, Užice

2. Elaborat o geotehničkim uslovima

fundiranja mosta Šlajz – šumska uprava

Kovilj u Kovilju – za nivo glavnog projekta

JP Vojvodinašume,

Novi Sad

3. Elaborat o geotehničkim uslovima

fundiranja mosta Kraljica –gazdinska

jedinica Plavanjske šume, Plavna

– za nivo glavnog projekta

JP Vojvodinašume,

Novi Sad

4. Geotehnički elaborat o uslovima izgradnje

fabrike za kompletiranje streljačke, sportske

i lovačke municije u Užicu, KP 743/1, KO

Ljubanje

JP Vojvodinašume,

Novi Sad


THE CENTRE FOR

STRUCTURES

AND PRESTRESSING

CENTAR ZA

KONSTRUKCIJE

I PREDNAPREZANJE


CENTAR ZA KONSTRUKCIJE

I PREDNAPREZANJE

Odeljenje za prednaprezanje


1.

Primena sistema prednaprezanja SPB i SPB

SUPER i radovi na prednaprezanju prilazne

konstrukcije desne obale mosta preko reke Save

kod Ostružnice, na autoputu E70/E75:

Dobanovci – Bubanj Potok, Obilaznica oko

Beograda.

STRABAG d.o.o

Beograd

DINARIK d.o.o.

Ogranak Beograd

2. Primena sistema prednaprezanja SPB i SPB


konstrukcije leve obale (polja L6-L16-S1) mosta

preko reke Save kod Ostružnice, na autoputu

E70/E75: Dobanovci – Bubanj Potok, Obilaznica

oko Beograda.

STRABAG d.o.o.

Beograd

GP NIKOLIĆ

d.o.o. Kraljevo



konstrukcije leve obale (polja L1-L6) mosta

preko reke Save kod Ostružnice, na autoputu

E70/E75: Dobanovci – Bubanj Potok, Obilaznica

oko Beograda.

STRABAG d.o.o.

Beograd

UDARNIK

GRADNJA d.o.o.

Beograd


SUPER i radovi na prednaprezanju za potrebe

sanacije temelja „D20” prilazne konstrukcije

desne obale mosta preko reke Save kod

Ostružnice, na autoputu E70/E75: Dobanovci –

Bubanj Potok, Obilaznica oko Beograda.

STRABAG d.o.o.

Beograd




SUPER i radovi na prednaprezanju montažnih

nosača Prilazne saobraćajnice na gornjem

staničnom trgu železničke stanice „Beograd

Centar”.

STRABAG d.o.o.

Beograd

GP NIKOLIĆ

d.o.o. Kraljevo

6. Inženjerig usluge prilikom ugradnje, injektiranja

i prednaprezanja geotehničkih sidara i ankera,

kao i ispitivanje istih, za potrebe stabilizacije

kosina „Mrtvica 1”, „Mrtvica 2”, „Mrtvica 0” i

„Momin Kamen”, na autoputu E-75, deonica

Caričina dolina – Vladičin Han, lot 5,

poddeonica Caričina dolina – Tunel Manajle

Integral

Inženjering

Ogranak Niš

Vektor Integra

Sarajevo,

Ogranak Beograd

7. Inženjerig usluge prilikom prednaprezanja

geotehničkih sidara i ispitivanje geotehničkih

sidara, za potrebe stabilizacije kosina na autoputu

E-75, deonica Gornje polje – Tunel Predejane,

LOT 1

AZVI S.A.

Ogranak Novi Sad

8. Prednaprezanje i ispitivanje geotehničkih sidara

za potrebe stabilizacije kosina na izlaznim

profilima tunela Predejane, na autoputu E-75,

deonica Grdelica - Caričina dolina, LOT 3

EURO ALIANCE

TUNNELS JSC

Ogranak Beograd

UNOGRADNJA

V.V. d.o.o.

Beograd

9. Ispitivanje geotehničkih sidara na potpornom

zidu autoputa E-75, deonica Gornje Polje –

Caričina dolina, LOT 2

TRACE GROUP

HOLD PLC

Ogranak Beograd

F. HYČA S.R.O.

10.


SUPER i radovi na prednaprezanju nosača u I

fazi, mosta preko železničke pruge, kanala i

lokalnog puta, na km 27+241, na autoputu E-

763, deonica Obrenovac - Ub

SHANDONG HI-

SPEED GROUP

PENTA GE CO

CONSTRUCTION

d.o.o. Beograd



11.


SUPER i radovi na prednaprezanju konstrukcije

mosta na km 29+789 autoputa E-80: Niš –

Dimitrovgrad, deonica: Bancarevo – Crvena

Reka

AKTOR SERBIA

12.


SUPER i utezački radovi na osiguranju obalnih

stubova prilikom sanacije mosta „Morača” na

km 424+978 na pruzi Vrbica – Bar u Crnoj Gori

FIDIJA” d.o.o.

Podgorica

Geosonda

Konsolidacija

Podgorica

DIORIT SRB

d.o.o. Beograd

13. Prednaprezanje i ispitivanje geotehničkih sidara

za potrebe stabilizacije klizišta na kosini iskopa

za pristupne puteve brane i akumulacije „Arilje”,

profil „Svračkovo”

Hidrotehnika

– Hidroenergetika

a.d. Beograd

14. Prednaprezanje i ispitivanje geotehničkih sidara -

zatega za potrebe izgradnje pristaništa

„Kostolac”

AQUA MONT

SERVICE d.o.o.

Beograd



za potrebe sanacije produženog nadvožnjaka na

državnom putu I-B reda, br. 12, na deonici Novi

Sad - Kać

ŽGP GP Beograd

d.o.o. Beograd



za potrebe sanacije nadvožnjaka preko

železničkih pruga Beograd – Niš i Trzpale -

Popovac, na autoputu Beograd – Niš, kod

Trupala

ŽGP GP Beograd

d.o.o. Beograd





za potrebe sanacije mosta preko kanala DTD na

putu Odžaci – Bački Gračac

West Gradnja

d.o.o. Šabac

18. Primena OVM sistema prednaprezanja i radovi

na prednaprezanju konstrukcije mosta „Rišice”

kod Zenice i BiH, na koridoru „Vc”

EURO-ASFALT

d.o.o. Sarajevo

PONT d.o.o.

Sarajevo

DIORIT d.o.o.

Sarajevo

19. Ispitivanje sile u kablovima sandučastog

prstenastog nosača hale 1 Beogradskog sajma

JP Beogradski

sajam

20. Specijalistički stručni nadzor rada pogona za

adheziono prednaprezanje elemenata „Martini

Gradnja”

Martini Gradnja

d.o.o. Inđija



Odeljenje za sanacije, projektovanje

i nadzor


1. Glavni pregled i Elaborat o stanju

konstrukcije pločastog prepusta na km

6+148 na obilaznici oko Brčkog

RUBAU d.o.o Brčko

2. Glavni pregled i Elaborat o stanju

konstrukcije objekta u Južnom bulevaru broj

10, Beograd

Južni izgradnja d.o.o.

3. Redovni pregled i Elaborat o stanju

prednapregnutog prstenastog sandučastog

nosača Hale 1 Beogradskog sajma

DP Beogradski sajam

4. Stručno mišljenje o mogućnosti obavljanja

vangabaritnog transporta na relaciji Kostolac

– Ripanj

Savatrans d.o.o.

5. Stručni nadzor nad izvođenjem specijalističkih

radova na sanaciji objekata aeratora i filtera na

postrojenju za prečišćavanje vode u Pančevu

JKP Vodovod i

kanalizacija,

Pančevo

6. Stručni nadzor na izgradnji mosta preko reka

Save i Kolubare na auto-putu E-763, deonica

Surčin – Obrenovac

JP Putevi Srbije

7. Izveštaj o pregledu mostova na auto-putu

E-763, deonica Obrenovac – Ub, od km 18

do km 40

China Shandong

International Economic

and Technical

Cooperation Group

Ltd.



Laboratorija za ispitivanje konstrukcija

R.b. Referenca

1. Ispitivanje probnim opterećenjem železničkog mosta preko reke

Morače, statički raspon L = 2 x 39,5 m = 79,0 m, Crna Gora

2. Ispitivanje i monitoring konstrukcije kranske staze HE Đerdap 1 pri

postavljanju turbinskog agregata ukupne težine 850 t

3. Ispitivanje probnim opterećenjem na 20 konstrukcija drumskih

mostova u Republici Srbiji

4. Ispitivanje stenskih ankera probnim opterećenjem – Koridor X,

autoput E-75, deonica Niš – granica sa Republikom Makedonijom,

Tuneli Predejane i Manajle, investitor Euro Alliance Tunnels JSC

5. Ispitivanje stenskih ankera probnim opterećenjem

– Izgradnja brane vodozahvata Svračkovo

6. Ispitivanje probnim opterećenjem AB stubova niskonaponske mreže

do 45kW, Crna Gora

7. Ispitivanje mehaničkih svojstava panela za smanjenje saobraćajne

buke više tipova od profilisanog aluminijumskog lima sa ispunom od

kamene vune

8. Ispitivanje nosivosti i deformabilnosti prednapregnutih nadvratnih

greda 12 x 6,5 cm dužine 150 cm i 200 cm

9. Ispitivanje poklopaca i slivničkih rešetki u ramu više tipova

10. Ispitivanje nosivosti i deformabilnosti instalirane balkonske ograde od

laminiranog stakla na zgradi BW Kule A u Beogradu

11. Ispitivanje nosivosti i deformabilnosti stakla balkonske ograde na

zgradi Lamele E Poslovno stambenog kompleksa WEST 65 na Novom

Beogradu



12. Ispitivanje nosivosti i deformabilnosti instalirane ograde od kaljenog

laminiranog stakla pričvršćenog za aluminijumski profil ograde

pomoću dvokomponentnog lepka na hotelsko poslovnom centru

Rajićeva

13. Ispitivanje nosivosti i deformabilnosti instalirane ograde od kaljenog

laminiranog stakla postavljenog u aluminijumski profil na objektu

Plaza u Višnjičkoj ulici

14. Ispitivanje nosivosti podnih ploča izrađenih od kaljenog laminiranog

četvoroslojnog stakla probnim opterećenjem

15. Ispitivanje krutosti prstena polietilenskih spiralno motanih cevi

ø1600 mm PR 9C-50/A 120

16. Ispitivanje nosivosti univerzalnih građevinskih podupirača

17. Ispitivanje nosivosti rama prostorne skele


CERTIFICATION BODY SERTIFIKACIONO TELO


SERTIFIKACIONO TELO

Institut IMS je akreditovan kod Akreditacionog tela Srbije kao sertifikaciono

telo za obavljanje poslova sertifikacije građevinskih proizvoda prema standardu

SRPS ISO/IEC 17065:2016, Opšti zahtevi za tela koja sprovode sisteme

sertifikacije proizvoda, rešenje broj 04-003.

Na osnovu Rešenja Ministarstva građevinarstva, saobraćaja i infrastrukture,

Institut IMS ad je imenovan kao telo za sprovođenje ocenjivanja usaglašenosti

cementa opšte namene i cementa za specijalnu namenu u skladu sa zahtevima

Pravilnika o kvalitetu cementa (Sl. glasnik RS, br. 34/13 i 44/14) i čelika za

armiranje betona u skladu sa zahtevima Uredbe o tehničkim i drugim zahtevima

za čelik za armiranje betona (Sl. glasnik RS, br. 35/2015 i 44/2016).

Institut IMS ad je upisan u registar imenovanih tela za ocenjivanje usaglašenosti

pod jedinstvenim registarskim brojem И 030.

Institut IMS ad je i u toku 2017. godine nastavio saradnju sa češkim institutom

TZUS (www.tzus.cz) kroz zajedničko sprovođenje sertifikacije proizvoda

prema harmonizovanim evropskim standardima, kao i kroz održavanje obuka u

cilju pripreme osoblja Instituta IMS za predstojeće izmene regulative.


Sertifikacija proizvoda prema harmonizovanim

evropskim standardima

1. ROCKWOOL ADRIATIC d.o.o. Potpićan, Hrvatska

2. URSA SLOVENIJA d.o.o. Novo Mesto, Slovenija

4. FIBRAN S.A. Thessaloniki, Greece

Sertifikacija proizvoda prema harmonizovanim

evropskim standardima u saradnji sa TZUS, Prag

5. SIKA d.o.o. Beograd, Srbija

6. LAFARGE BFC d.o.o. Beočin, Srbija

7. CRH (Srbija) d.o.o. Popovac, Srbija


CONTROL BODY KONTROLNO TELO


KONTROLNO TELO INSTITUTA IMS

Krajem 2014. Kontrolno telo je dobilo sertifikat o akreditaciji ATS br. 06-170.

Akreditacija obuhvata oblasti kontrolisanja koje se sprovode u Centru za

metale i energetiku.

Kontrolisanje nove opreme pod pritiskom.

Ocenjivanje usaglašenosti nove opreme pod pritiskom primenom modula B, B1,

C1, F i G prema odredbama Pravilnika o tehničkim zahtevima za projektovanje,

izradu i ocenjivanje usaglašenosti opreme pod pritiskom (Sl.Glasnik RS

87/2011) i relevantnih harmon izovanih standarda.

Kontrolisanje proizvoda od gvožđa i čelika – pljosnati proizvodi, limovi, trake,

profili, cevi, šipke, žice, odlivci, otkovci, liveno gvožđe.

Kontrolisanje metalnih konstrukcija – čeličnih i aluminijumskih.

Kontrolisanje delova postrojenja i objekata pri izgradnji, rekonstrukciji,

revitalizaciji i remontu – procesnih, hidroenergetskih, hidromašinske opreme,

hidromehaničke opreme, termoenergetskih, turboenergetskih).

Kontrolisanje tehnologija zavarivanja metalnih materijala (elektrolučno

zavarivanje, gasno zavarivanje, navarivanje).



R.b. Referenca

1. Prijemna kontrola opreme za HE Đerdap 1 - Kladovo u fabrikama:

SILOVIJE MAŠINE, St. Peterburg – Rusija;

BRUNO PRESEZZI , Milano, Burago di Molgora – Italija;

LITOSTROJ JEKLO, Ljubljana - Slovenija;

DSD Noell GmbH, Papenburg – Nemačka;

SILBITZ GUSS, Silbitz – Nemačka;

UCMR , Rešice – Rumunija;

GENERAL TURBO, Bukurešt – Rumunija;

PILSEN STEEL S.R.O., Plzen - Češka Republika;

GOŠA FOM – Smederevska Palanka;

MARKANT, Valjevo;

KOLUBARA METAL, Lazarevac;

PRVA PETOLETKA, Trstenik;

FOD, Bor.

2. Superkontrola delove mašinske opreme za površinske kopove:

PD TE i Kopovi Kostolac; PD Prim, Kostolac; RB Kolubara,

Lazarevac; TE Nikola Tesla, Obrenovac.

4. Kontrola kvaliteta čeličnih elemenata konstrukcije mosta preko reke

Save, metodama sa i bez razaranja za Ogranak Porr Technobau Und

Umwelt Aktiengesellschaft Beograd

5. Kontrola kvaliteta sastavnih delova betona ugrađenih u most preko

Save za Ogranak Slovenija Ceste – Tehnika Obnova Beograd

6. Kontrolisanje i ispitivanje mašinske opreme i radovi na gradilištu u

toku revitalizacije bloka 1 i izgradnji postrojenja za odsumporavanje

dimnih gasova blokova 1 I 2 u TE Kostolac B, PD TE KO Kostolac

7. Kontrola opreme i rezervnih delova na kotlovskom postrojenju u

kapitalnom remontu bloka B2, za period 2012-2015. god. za PD TE

KO Kostolac


PT PROVIDER PT PROVAJDER


PIMS - PROVAJDER ZA ISPITIVANJE

OSPOSOBLJENOSTI INSTITUT IMS

Provajder za ispitivanje osposobljenosti Institut IMS je tokom 2017. godine

realizovao 11 šema ispitivanja osposobljenosti ispitnih laboratorija (ocenu

njihove kompetentnosti), sa predmetima ispitivanja prikazanih tabelom. Učešće

u realizaciji ovih šema uzelo je 94 laboratorije iz 28 zemalja Evrope, Azije i

Bliskog istoka.

Provajder Institut IMS je u postupku akreditacije kod Akreditacionog tela

Srbije, kao prvi provajder za ispitivanje osposobljenosti ispitnih laboratorija.

R.b. Predmet ispitivanja osposobljenosti Broj učesnika

1.

Cement

ciklus hemijskih svojstava

ciklus fizičko-mehaničkih svojstava

12 (5 iz Srbije)

23 (6 iz Srbije

i 3 sa Kosova)

2. Kameni agregat


24 (5 iz Srbije

i 3 sa Kosova)

3. Ploče iverice


6 (1 iz Srbije)

4. Bitumen

ciklus fizičkih svojstava

14 (3 iz Srbije

i 1 sa Kosova)

5. Buka u životnoj sredini

ciklus u zatvorenom prostoru

ciklus na otvorenom prostoru

7 (3 iz Srbije)

7 (4 iz Srbije)

6. Zvučna izolacija

ciklus izolacije od zvuka građevinskih

elemenata (terensko merenje)

6 (2 iz Srbije)

7. Elementi za zidanje od gline

ciklus mehaničkih svojstava

9 (1 iz Srbije

i 1 sa Kosova)

8. Požarna ispitivanja

ciklus ispitivanja negorivosti

12 (1 iz Srbije)


9. Keramičke pločice

ciklus ciklus fizičko-mehaničkih svojstava

9 (1 iz Srbije)

Ukupno: 129 (32 iz Srbije

i 8 sa Kosova)


Documents

REVIEW NAUČNIH I STRUČNIH rezultata 2017.pdf · review of research and business results of the ims institute in 2017 pregled nauČnih i struČnih rezultata instituta ims u 2017