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है”ह”ह

IS 7193 (1994): glass fibre base bitumen felts [CED 41:Waterproofing and Damp-Proofing]

July 1994

IS 7193 : 1994(Reaffirmed 2009)

Indian Standard

GLASS FIBRE BASE BITUMEN FELTS — SPECIFICATION

( First Revision)

Second Reprint NOVEMBER 2006(Including Amendment No. I )

UDC 691.165 : 666.198.211

BlS 1994

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Price Group 4

AMENDMENT NO. 1 AUGUST 1999TO

IS 7193: 1994 GLASS FIBRE BASE BITUMENFELTS - SPECIFICATION

( First Revision)

2' ~,

(Page 1, Tobie 1, SINo.1. col 3 ) - Substitute '40gperm for '40e~r/m- .

(Poge 1, Table 1, 51 No.4, col4 ) - Substitute 'C-S' for 'c-r.

(Page 1, Table 1,51No. S, col 4 ) - Substitute 'C-6' for 'C-4'.

(Poge 1, cialise4.1, secondsentence) - Substitute 'coatant' for 'constant'.

(Page 2, clause8.1.1, line 1 ) - Delete the words 'type and'.

r Page 2, Table 3, SI No. (vi), col 2 ) - Substitute 'Water absorption, Mar' for'WaIn absorption'.

( Page 3, clause lO.I(c) I - Substitute 'Grade of the glass fibre basebitumen felts;' for 'Type and grade of tbe glass fibre base bitumen felts.'

( Page 5, Annex C, clause C-l, heading) - Substitute 'METHOJ)S 0."rrEST .--OR l·":Sl"ING WEIGlfT OF GLASS FIBRE TISSUE' for'~II~l"HOI)S 0 .... rssr ....on l"ESl'ING DENSll"Y 0." GLASS ."IBRETISSUE-.

(Page 6, clauseC.J, heading) - Substitute 'METHODS OF TEST FOR"rES1·ING BREAKJNG S"rREN(;l"H 0." GLASS FIBRE TISSUE' for'METHOI)S 0." TEST FOI{ "rESl''1NG TENSILE STRENGTH OF GLASSFIBRE l"ISSUE'.

(Ptlge 7,clauseC-4 ) - Delete and renumbertbe subsequent clauses.

( Page8, clause c-7 ) - Delete.

(CEO 41)

Printed at: Prabhat Offset Press. NewDelhi-z

Water.Prooflnl and Damp-Proofin, Sectional Committee, CED 41

FOREWORDThis Indian Standard ( First Revision) was adopted by the Bureau of Indian Standards, after thedraft finalized by the Water·Proofing and Damp-Prootlos Sectional Committee had been approvedby Civil BQaineering Division Council,

Glassfibre bitumen felts are suitable for use for water-proofing and damp-prooiDI in buildiapand other situations where penetration of moisture is to be stopped. This standard specifle. therequirements for glass fibre base bitumen felts. It is an adjunct to IS 1322: 1993 Speci8catioDfor bitumen felts for water-proofing and damp-proofing (fourth ,,,Islon ).

This is the first revision of the standard. In this standard testinl methods to ascertain the physi­cal properties or ,lass fibre tissue have been added. All references have alsc been updated to takecare of latest revision of the referred standards.

In the formulation of this standard due weightage has been given to international co-ordinationamoDI the standards and practices prevailing in different countries in addition to relatiDs it tothe practices in the field in this country.

The committee responsible for the formulation of this standard is liven in Annex A.

For the rurpose of deciding whether a particular requirement of this standard is complied with,the ftDa value, observed or calculated, expressing the result or a test or analysis, shall berounded off in accordance with IS 2 : 1960 'Rules for rounding off numerical values (,.,lIed )~.

ne number of significant places retained in the rounded off value should be the lame as that ofthe specified value in this standard.

IS 7193: 19H

Indian Standard

GLASS FIBRE BASE BITUMEN FELTS­SPECIFICATION

( First Revision )

4 MATERIALS.4.1 BIMMembrue

The fibre glass tissue shall be thin flexible uni­formly bonded mat, composed of chemicallyresistant borosilicate staple glass fibres, distri­buted in a random open porous structure,bonded together with a thermosetting resin( phenolic type). The physical properties ofthe membrane shall be as given in Table 1.

Table 1 Requlremeots of Glass Fibre Tissue

1 SCOPEThis standard covers the requirement for selffinished glass fibre base bitumen felts used forwater-proofing and damp-proofing.

Z REFERENCES

Z.1 The Indian Standards listed in Annex Barenecessary adjuncts to this standard.

3 CLASSIFICATION

3.1 Glass fibre base felts shall comprise thefollowing grades:

a) Grade I - Talcum, mica or sand surfaceglass fibre base bitumen feltsfor water-proofing.

b) Grade 2 - Talcum, mica or sand surfacedglass fibre base bitumen feltsfor damp-proofing.

1978 and penetration of not less than 7 at 25°Cwhen tested in accordance with IS 1203 : 1978.The constant shall consist of finely divided inertfiller. The proportion of mineral inert fillerwill depend upon the type and the weight offelt manufactured; but shall not exceed 40 per­cent by weight of the coating material,

4.3 MiDeral Filler

It shall consist of finely divided suitable inertmineral matter which is insoluble in water andpasses through 75 microns IS Sieve [see IS 460( Part 1) : 1985 ].

4.4 Mineral Powder for Surfacing

4.4.1 Mineral powder shall be powdered mineralmatter such as talc or mica passing through600microns IS Sieve[ see IS 460 (Part 1) : 1985 ]_Sand passing through 250 microns IS Sieve[lee IS 460 ( Part I ) : 1985 ] may also be used.

4.4.2 Weight

The weight of the surfacing material shall be asfollows:

a) Mica 1-2 to 2·0 kg/tO ml

b) Talc powder I·S to 2-25 kg/IO m'

e) Sand 3 to 5 kg/IO ml

5 MANUFACTURE

The bitumen glass fibre base felt consists of acontinuous mat of resin bonded glass fibrestreated with bitumen. The coatant shall beuniformly applied. The resultant coated feltshall be given superficial application of mineralpowder to prevent the layer of the coated feltsticking together in the roll. This also givesuseful protection against the affects of the sunand when laid on roofs does not need fUI thertreatment.

, DIMENSIONS AND WEIGHf

'.1 DlllleDSloDS

Method ofTest,

Refereace(4)c.i

C·2C-3

C-4C·4

Reqal~'Dtl

0·6 mm to 1·9 romShall be unaffectedunder load in hotbitumen at 280°Cror one minute

81 ClwaderlltlmNo.

(1) W. h (2) . (3)I ell t per unit 40I per/m-

area, Mill2 Nominal thickness O· 5011lIn :I: O· t mm3 BreakiDI atren.tb, 45 kif per 150mm

MI"4 Porosity5 Temperature

reailtanco

4.Z Bitamea Unless otherwise specified, glass fibre base feltIt shall have a softening point of not less than shall be supplied in widths of one metre and10SoC when tested in accordance with IS 1205: generally in lengths of I m, 10 m and 20 m.

1

IS 7193 : 1994

'.2 WeJabtThe weight of the ingredients used in the manu­facture of glass fibre felts for 10 rot shall not beless than those specified in Table 2.

Table 2 Miaimum Weight of Glass FibreBase Bitumen Felts for 10m2

81 Type 01Pelt Untreated Coatsnt Total Weight In DryNo. Bale Condition Including

Surfacing Materials

(I) (2) (3) (4) (5)kg kg kg

i) Grade 1 0·4 IS·] 18·0ii) Grade 2 04 22·0 25·0

'.2.1 MethodFor determining the weight, select at randomthe number of glass fibre felt rolls as indicatedin col 2 of Table 4. The randomness of selec­tion is ensured by following the procedure asspecified in IS 4905 : 1968. The average weightsof the rolls selected above shall then be takento represent the weight of the rolls in the con­signment and the weight for 10 ml computedfrom this weight.

7 OTHER REQUIREMENTS OF GLASSFIBRE FELTS

7.1 Bitumen felts when tested in accordancewith the appropriate tests shall conform to therequirements given in Table 3.

8 SAMPLING AND CRITERIA FORCONFORMITY

8.1 SampliDI

8.1.1 Lot

All the rolls of the same type and grade and

from the same batch of manufacture, in oneconsignment shall constitute a Jot.

8.1.1.1 The conformity of the lot to the require­ments of this standard shall be determined ODthe basisof the inspection and tests carried outon the samples selected from the lot.

8.1.2 The number of rolls to be selected floma lot shall depend upon the size of the lot andshall be in accordance with coIl of Table 4.

8.1.2.1 These rolls shall be selected at randomfrom the lot, and in order to ensure randomnessof selection, procedures given in IS 4905 : 1968may be followed.

l'able 4 Sample Size and CriterioD for CODrorallty

[( Clauses 6.2.1, 8.1.2, 8.1.3.2, and 8.1,4 ( a )]

No. of the Roll No. or Rolls Permissible Sub-SampleIn the Lot to be Selected No. or Size No. or

in the Sample Defectl,e Rolli to beRolls Selected

(J) (2) (3) (4)

Up to 100 5 0 2101 to 150 8 0 3lSI to 300 13 0 4301 to 500 20 1 SSOl to 1000 32 2 6

1001 to 3000 SO 3 83001 and above 80 S 10

8.1.3 Test Samples andNumber of Tests8.1.3.1 All the rolls of selection in 8.1.1 shall beinspected for width, length and visible externaldefects.

8.1.3.1 The number of rolls to be tested forbreaking strength, pliability, storage sticking,heat resistance, water absorption, and pressure

Table 3 Requirements of GlassFibre Felts( Clause 7.1 )

81 No.I)

ii)

iii)

iv)V)

vi)

PropertiesBreaking strength, Min kl

Pliability test

Storage .tickins

Pre.sure headHeat resistance

Water absorption

Requirementsa) Warp SOb) Weft 30a) Roll shall not show cracks on unrollingb) Consider any surface rupture exceeding

Smm in length as failureThe test pieces shall be examined after cooling,After release of load, the layers of felt becapable of being separated without damaging

The test pieces shall show no sign of leakageThe test pieces aha11 show no silo ofmelting of bitumen compound2 percent

2

Reference toIS 13826 ( Part 1) : 1993

IS 13826 ( Part 2 ) : 1993

IS 13826 (Part 3 ) : 1~3

IS 13826 ( Part 4 ) ~ 1993IS 13826 ( Part 5 ): 1993

IS 13826 ( Part 6 ) : 1993

head, shall be in accordance with col 4 ofTable 4. These rolls shall be taken at randomfrom those inspected under 8.1.3.1 and foundsatisfactory for dimensions. From each of theserolls, one test sample of 3 m long and the fullwidth of the felt shall be cut out for preparingtest specimens. Test samples shall not be takenfrom damaged portion of the roll, if any. Therequired number of test specimens shall betaken from each of the test sample and subjec­ted to the corresponding tests.

8.1.4 Criteria for Conformity

The lot shall be considered to be in conformitywith the requirements of the standard if thefollowing conditions are satisfied:

a) The number of rolls found defective withrespect to any characteristic mentionedin 8.1.3.1 does not exceed the corres­ponding number given in col 3 of Table 4.

b) From the observed values of the breakngistrength, the average x and the range Rare calculated for each direction ( that is,warpway and weftway ) separately, andthe value of the expressionx-O·6 R isfound to be greater than or equal to theapplicable specified value.NOTES

1 Average x is the value obtained by dividingthe Sum of the observed values by the numberof observed values.2 Range R is the difference between the maxi.mum and minimum in a set of observed values.

c) All the sample rolls tested for waterabsorption shall satisfy the conditions ofwater absorption given in Table 3 indivi­dually.

d) For all the other characteristics men­tioned in 8.1.3.2( except breaking strengthand water absorption ), all the test pieces

IS 7193 : 1994

shall satisfy all the requirements of thecharacteristic individually.

9 PACKING

Unless otherwise specified, glass fibre base bitu­men felts shall be securely packed in rolls. Thebitumen felts need not be wound on core butshall be securely wrapped in a craft paper ofthe same width as the fabric. The wrappershall completely encircle the roll and shall bepasted at the overlap in a manner that willprevent it from opening out. The ends of theroll need not be covered.

10 MARKING

10.1 Each package shall be legibly and indeliblymarked with the following:

a) Identification of the source of manu­facture;

b) The country of maufacture;

c) Type and grade of the glass fibre basebitumen felts;

d) Length, width and weight of the roll; and

e) Batch number in code and date ofmanufacture.

10.1 DIS CertificationMarking

Each package may also be marked with theStandard Mark.

10.1.1 The use of the Standard Mark is governedby the provisions of the Bureau of IndianStandards Act, 1986 and the Rules and Regula­tions made thereunder. The details of conditionsunder which the licence for the use of StandardMark may be granted to manufacturers orproducers may be obtained from the Bureau ofIndian Standards.

3

IS 7193 : 1994

ANNEX A( Foreword)

COMMITTEE COMPOSITION

Water-Proofing and Damp-Proofing Sectional Committee, CED 41

Director General. BIS (Ex-ojficioM.mber )

FOP Ltd, BombayCentral Duildinl R.esearcb Institute ( CSIR. ), Roorkee

Projects and Development India Ltd, Dhanbad

MC-Bauchemic( India) Ltd, Bombay

Intejrated Water.ProofiDl Ltd, MadrasPublic Works Department, Government of Tamil Nadu

STP Ltd, Calcutta

MBS Builders ASlociation of India, New Delhi

B: G. Shirke & Co, PuneLloyd Bitumen Products Pvt Ltd, Calcutta

Buildina Materials" Technology Promotion Council, New DelhiCempire Corporation, MadrasBharat Petroleum Corporation Ltd, Bombay

Overseas Water-Prooftoa Corporation Ltd, Bombay

Posroc India Ltd. Bangalore

Cenral Public Works Department, CDO

Enaineer-in-ChieC's Branch, Army Headquarters, New Delhi

National Test HOUle (BR), Calcutta

National Buildings Organization, New DelhiCentral Road Research Institute, New DelhiEnaineers India Ltd, New Delhi

Metro Railway. Calcutta

Synthetic Asphalts, BombayPolyseal India Enlineering Centre, Bombay

ChairmanPROP M. S. SHETrY

No.4, Sapan Daul, Near Empress Garden, Poona-411OO1Representln,

Osnar Chemical Pvt Ltd, HOIUblY

Members

CAPT ASHOK SHASTRYSHRI S. K. BANERJES (Alternate)

- SHRIT.CHAUDHURYSHRI B. MANDAL ( Alternate)

DIRP.CTOR ( DESIGN)

SR.I D. C. GoeL

SRRI A. K. GUPTASHltl D. MOUDQIL ( Alternate)

SqRI A. K. GUPTASHRI K. RAJOOPALAN ( Alternate)

SRRI M. B. JAYAWANT

SRRI MOJZ S. KAODISHRI SUREN M. THAKKER ( Alternate )

SaRI M. X. XANCHANSHill K. D. NARULA ( Alternat« )

Balo V•K. KANITKARSHRI C. S. S. }lAO ( Alternate)

SRKI M. H. KHATRISHRI A. BOSI ( Alternate)

SHRI Y. P. KAPOORSRRI V. NATARAJAN ( Alternate)

SHRI H. C. MATA!

SRRI M. M. MATHAI

SHRI R. D. NAYAKSHill p. C. SRIVASTAVA ( Alternate)

COL D. V. PADSALGIKAR ( 'RETD )

SRRI R.. P. PuNJSRRI A. K. SEN ( Alttrnate )

SaRI RAVI WIOSHRI K. K. MADHOK ( Alternatt )

SHIU T. K. RoySRaI B. B. BANERJEE ( Altemat« )

SHRI SAMIR SUIlLAXERSHRI JAYANT DBOOAONKAR ( Alternate)

SHRI R. SARABESWAR

Sa DEPUTY CHIB. ENOINEERSUPERINTENDING ENG IN!ER

( MADRASCIRCLI ) ( Alternate )S8RI A. SHARI"

SHRIJ.S.SHARMASHRI R.. S. RAWAT ( Alternate)

SaRI SRAMAL SSNGUPTASaRI U. R.. p. SINHA ( Alternate)

SHaIJ. VINKATARAMAN,Director ( Civ Enll )

Secr,tarySHill J. K. PRAsAD

Joint Director ( Civ Enl.). DIS

4

IS 7193 : 1994

TitleMethods of tests Cor bitumenbased felt: Part 3 Storagesticking test

Methods of tests for bitumenbased felt: Part 4 Pressurehead test

Methods of tests for bitumenbased felt: Part 5 Heat resis­tance testMethods of tests for bitumenbased felt : Part 6 Waterabsorption test

Methods of tests for bitumenbased felt : Part 7 Determina­tion of binder content

ANNEX B( Clause 2.1 )

LIST OF REFERRED INDIAN STANDARDS

Title IS No.

Specification for test sieves: 13826Part 1 Wire cloth test sieve (Part 3 ) : 1993( third revision)Methods for testing tar and 13826bitumen : Determination of (Part 4 ) : 1993penetrationMethods for testing tar andbitumen : Determination of 13826softening point ( Part 5 ) : 1993

Methods for random sampling 13826Methods of tests for bitumenbased felt: Part 1 Breaking (Part 6 ) : 1993strength testMethods of tests for bitumen 1~826based felt: Part 2 Pliability (Part 7 ) : 1993test

1205 : 1978

4905 : 196813826( Part I ) : 1993

13826( Part 2 ) : 1993

1203 : 1978

IS No.460 ( Part 1 ) :

1985

C-l.2 Procedure

Weigh the sample in a balance having anaccuracy of 0·5 S and record the results.

NOTS - For easier weilhinl, the piece of 100em x100 em may be cut in smaller sizes and weiahedtOlether.

C-2 METHOD OF TEST FOR DETERM t,NATION OF TISSUE THICKNF.8S

C-2.1 PrlDclples

The thickness of glass fibre tissue is determinedby placiDa sample on a glass plate, and a metal­lic cylinder of foot and anvil area both 6'45 em­exertiDI a pressure of 35,/cml and measuringthe deflection in dialsaule havins a least countorO·Ol mm (,e, FiS. I ).

ANNEX C

( Clause 4.1 and Table 1 )METHODS OF TEST FOR TESTING VARJOUS PROPERTIES

OF GLASS FIBRE TISSUE

c-i METHODS OF TEST FOR TESTING C-2.2 EquipmentDENSITY OF GLASS FIBRE TISSUE a) Stand with glass plate;C-l.1 Test Piece b) Lifting mechanism;Cut out approximately about 2 m from the roll. c) Metallic cylinder, weighing 227 8; andMeasure and cut a sample exactly 100 em x d) Dial gauge with clamp.100 em.

C-2.3 Method

C-2.3.1 Place the cylinder on glass plate andset the gauge on the cylinder to read zero.

C-Z.3.1 Cut approximately 100 em x 100 emacross the width.

C-2.3.3 Press the clamp to lift the metalliccylinder to allow for insertion of the sampleand gently lower the cylinder to rest on thesample.C-2.3.4 Measure the thickness at 12 equallyspaced areas through a dial gauge having a leastcount of 0-01 mm. The loading given shall be35 s/eml

•

C-2.3.5 The average of 12 readings arc takenas the mean thickness and recorded to theaccuracy of 0·01 mm.

5

IS 71'3: l~

LIFTINGMECHANISMFORCV LINDE R-....~,........"",

DIAL GAUGE WITHLEAST COUNT OFO'Olmm

METALLICCYLINDER

GLASSPLATE

PIO.' ARRANOEMBNT FOR MSA!UaEMENT OP THICICNBSS

p_ PI + P2 + P3 + P4 + P5 + P66

C-3.3.5 Average breaking load shall be calcula­ted as follow8:

FIBRE GLASSTISSUE

ADHESIVETAPE

GLASS YARNREINFORCEMENT(10 Nos.)

-

...-

Sc-,-

m-.L

J.-'0cm..lPIG.2 TEST SAMPLE POA TBNSILI STIlBNOTB

I

SOem

C-2.4 CaleallUob

C-2.4.1 Average the total number of readingsand record to an accuracy of 0·01 mm,

e-] METHOD OF TEST FOR TESTINGTENSILE STRENGTH OF GLASS FIBRETISSUE

C-3.1 Breaklll StreDltb

The breaking strength is measured along thelength of the reinforcement.

C-3.1 Test PieeelUsing a SO'O em x 10-0 em template, cut sizesamples of tissue with reinforcement along thelonger side. Number them 1 to 6 ( see FiS. 2 ).

e·3.3 ProcedureC-].3.1 For each of the samples cut two lengthsot adhesive tape measuring approximately30 em X S em.

Take sample No.1, wrap and stick each lengthor adhesive tape over the 10 em wide ends.This is a precaution taken for the testing of amembrane material like RP tissue. The tapeenables better gripping of the sample in thetensile machine grippingjaws.

C·3.3.2 Apply load along the length of thesample by movins the lower jaws of the testingmachine away from the upper jaws at about2S0 mm/minutes.

C-3.3.3 Note the breaklng load as Pl.

C-3.3.4 Repeat (C-3.3.1 ) to ( C-3.3.3) Cor theother 5 samples, and record it as P2, P3, P4, PSand P6.

IS 7193 : 1994

C-4 METHOD OF TEST FOR TESTING TEAR division, also record the number of plies usedSTRENGTH OF GLASS FIBRE TISSUE in the specimen.

C-4.1 Apparatus

Elmendorftype tearing tester as shown in Fig. 3.The machine is provided with two clamps; onefixed and the other movable which is carriedOD a sector shaped pendulum, suspended from acolumn by means of a frictionless bearinglocated near the apex of the sector. A meansis provided to hold the pendulum in the raisedposition and a lever to release the penduluminstantaneously. On releasing the pendulum,the centre tongue of the specimen is subjectedto the load of pendulum recorded through aspring loaded friction pointer on the circum­ferential scale marked on the pendulum.

C-4.Z Test Procedure

C-4.2.1 With a template, cut 10 specimens ofsize 53 mm long and 63·0 + O'lS mm wide,taking all the plies to be torn together from asingle sheet.

C..t.2.2 Raise the pendulum sector to its initialposition and set the point against its stop. Centrethe specimen in !he clamps with the bottom edgecarefully set against the stops. Make the initialslit. Depress the pendulum stop quickly as faras it will go to release the pendulum. Holddown the stop until after the tear is completedand catch the pendulum on the return swingwithout disturbing the position of the pointer.

C-4.~.3 Make o~l~ one test per specimen, eachspecimen consistmg same number of plies.Record the scale readings to the nearest half

FIXED CLAMP

MOVINGCLAMP

LEVELLINGSCREW

C-4.2.4 Calculate the average tearing force ingram-force to tear a single ply as follows:

If the standard I 600 kgf instrument with0-100 scale is used.

Average tearing 16 X Av. scale readingforce (GF) = .Number of plies

C-4.1.5 Report results with tear parallel withthe machine direction and tear perpendicularto machine direction.

C-5 METHOD OF TEST FOR TESTINGPOROSITY OF GLASS FIBRE TISSUE

C-S.l Test Piece

Five specimens, in the size of the 25 em x25 em representative of the glass fibre tissuemat shall be taken.

C-5.1 Apparatus

The apparatus shall consist essentially of asuction fan for drawing air through a knownarea of glass fibre tissue, a circular orifice overwhich the tissue to be tested can be clamped.A means of measuring the pressure drop acrossthe mat, and means of measuring the volume ofair flowing through the tissue.

The clamp shall effectively eliminate edgeleakage.

ADJUSTING SCREW FORPOINTER FRICTION DEVICE

LEVELLING MARKS

PENDULUM

RELEASELEVER

FIG. 3 OINBItAL VIBW OP ELMBNDOR.P TYPB TSARING STRENGTH TESTBR

7

IS 7193 : 1994

C-5.3 ProeedareMount the test specimen between the clampand the circular orifice with sufficient tensionto draw the unsaturated glass mat smooth. Itshall not be distorted in its own plane. Drawconditioned air through the known area of themat and through the calibrated flow meter atthe rate of I m/sec and record the pressuredrop across the tissue in mm of water. Reportthe average or the test results for five testspecimens.

C-6 METHOD OF TEST FOR TESTINGTEMPERATURE RESISTANCE OF GLASSFIBRE TlSSIJE

c-s.i Te.t Piece.

Three test specimens of dimension 300 mm x7S mm with reinforcement along the longersidesshall be taken.

C-6.Z App.at..C-6.1.1 The apparatus required consists of adish A and a loading frame B. This carriesclamps C and D attached to a cord which overpulley P, carries a mass M (200 g). Two

cross bars E of stainless steel of 10 mm outsidediameter are so positioned that they are10mm above base levels ( see Fig. 4 ).e-6.3 Procedure

C·6.3.1 Fill the dish A with hot bitumen approxtemperature 280cC to a level of 20 mm. ClampS mm of one end of the specimen in clamp Cand the other end in clamp D. Attach massinto the free end of cord. Ensure that speciemen lies at right angle to cross bars E. Placethe frame B in dish A. Observe it for one minutefor result.

c-7 METHOD OF TEST FOR TESTINGPLIABILITY OF GLASS FIBRE TISSUE

C-7.1 Test Piece

S pieces of size 2S mm x 203 mm with a longdimension parallel to the length of ro 11.c-7.2 ProcedureImmerse the test piece in water at ( 23OC+ loe )for 10 minutes. Remove each specimen indivi­dually and bend over a 6-4 mm rod/tube througha 900 arc. Examine each specimen for cracksand breaks.

B

TISSUE TESTSPECIMEN--...l....

POUR HOTBITUMEN

FIG.4 TEMPERATURB RBSlSTANCB TESTING ASSEMBLY

8

Bureauof Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsandattending to connected matters in thecountry.

CopyrlCht

BIS has the copyright of all its publications. No part of these publications may be reproduced in any fonnwithout the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as theneedarises on the basis of comments. Standards are alsoreviewedperiodically; a standard along with amendments is reafTmned when suchreview indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that theyare in possession of the latest amendments or edition by refeningto the latestissue of'BIS Catalogue' and 'Standards: Monthly Additions'.

ThisIndian Standard hasbeendeveloped from Doc: No. CED 41 ( 5007 ).

Amendments Issued Sinee Publleatlon

Amend No. Date of lssae

BUREAU OFINDIAN STANDARDS

TextAffected

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Telegrams : Manaksanstha(Common to all offices)

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{2254 12 16,2254 144222542S 19, 2254 23 15

Western : Manakalaya, E9MIDC, Marol, Andheri (East) {2832 92 95,2832 78 58MUMBAI 400093 28327891,2832 7892

Branches : AHMEDABAD. BANGALORE. BHOPAL. BHUBANBSHWAR. COIMBATORE. FARIDABAD.GHAZIABAD. OUWAHATI. HYDERABAD. lAIPUR. KANPUR. LUCKNOW. NAGPUR.NALAGARH. PATNA. PUNE. RAJKOT. THIRUVANANTIIAPURAM. VISAKHAPATNAM.

PnDIed AIPrabhat Offill Prell. New DeJhi·2