Assignment

ASSIGNMENT II (Construction Quality Management)

NICMAR / CODE OFFICE

1. Name

-Arvind K2. Reg. No.

-214-04-11-12192-21633. Course No.

-NCP 274. Course Title -Construction Quality Management5. Assignment No. - Two6. Date of Dispatch -ASSIGNMENT You have been selected as a project manager for a prestigious high rise building in Mumbai which will be housing very rich personalities from industry and film world.

Your company management has asked you to formalize Quality Management System (QMS) for interior finishes, plumbing and prevention of rain water seepage so that the overall quality standard and image of company is raised.

Purpose: The purpose of this document i.e. Quality Assurance Plan is to establish work methodology for Quality Control and Material engineering for Construction of High Rise Building in Mumbai for very rich personalities from industry and film world.

The procedure will outline the methods that will be used in line with the National Building Codes, Local building codes Specifications for Building works and the Technical Specifications as per the requirements of the Engineer or his representatives. The methodology also defines the standards of workmanship and requirements for materials necessary for the work.

Scope: This procedure is applicable to all engineers, workmen, supervisors, inspectors and quality control personnel engaged in the works for the Construction of High rise residential apartments in Mumbai. It intends to correlate and control the tasks pertaining to Quality Control and Materials testing in compliance with the requirements.Quality management System

Quality management system refers to all plans, processes and activities that are developed to achieve the intended degree of conformance in the design and execution of any project. The QMS concept focuses attention of the following specific aspects of construction processes.

1. Construction is a one time activity. It affords no second chance of modification, repair or rejection once the construction work is completed. There is no scope for catching the defects after the construction is over. Therefore quality consciousness, skill and workers are essential in achieving quality. Training, motivation and commitment are the primary requirement of quality construction.2. With the increase in complexity and the size of construction operations, the responsibility for ensuring quality has gradually shifted from the worker to supervisor of inspection and later to the quality control department. This3. Trend has to be reversed if quality is the goal. Responsibility to ensure quality has to be shifted back to the worker at site and his supervisor.

4. It is a well known fact that the quality cannot be constructed. It has to be designed into a project system. QMS therefore starts from the design stage itself. Quality of design is the difference between various design of the project for achieving the same end use and the most optimal design finally selected. Thus economy, quality and safety are very closely interlinked in construction process.

5. Quality is expensive. Quality decisions are based on trade-offs between cost of construction and the benefits derived from the operations of facility. Once the decision is taken, it has to be backed by appropriate staff strength, infrastructure and support services. The management must therefore be committed to quality, participate in all measures developed to achieve it and lend support to QMS personnel.6. QMS is the responsibility of the project authority. The owner or his representative formulates the policy, determines the scope of quality planning and management establishes the relationship between the various participating organizations and delegates responsibility and authority to them so that the quality objectives set by the owner are achieved.

Quality Control: Quality control refers to the technical processes that gather, examine, analyze and report the projects progress and conformance with the performance requirements. QC mainly relates to four basic functions:1. Setting up of standards and specifications.

2. Evaluating materials, processes and outputs through appropriate tests, inspection etc.

3. Appraising failures to these standards and acting when standards are not being adhered to.4. Planning improvements in the standards and specifications.

Quality Control norms, techniques and procedures:

Inspection:

Once quality standards and other things are laid out inspection becomes a routine matter. In any quality control programme actual inspection and measurement is an un-detachable factor, which is to be planned at properly to meet with the overall objective of the quality control. Various stages of inspection should be determined. Some of such stages could be following.

i. Material inspection at suppliers end.

ii. Material inspection at the stage of receipt.

iii. Material inspection at the stage of issue.

iv. Inspection of the process at the time of initial setting of machine/equipment.

v. Inspection of trial run batch.

vi. Inspection while the execution is in progress.

vii. Inspection of the finished process.viii. Inspection before erection and commissioning.

ix. Inspection of commissioning.

x. Inspection of machines and equipment commissioned. Having decided various stages of inspection and various quality characteristics to be inspected it is also important to decide who will inspect, when the inspection will be carried out, how many units will be inspected, instruments to be used required approval for acceptance.

While planning such inspection activities it is also important to decide what information is to be given to the inspector at the time of inspection. Some of the basic information required is design specifications, product specification, quality characteristics, quality standards and tolerances available and the detailed inspection procedures.

For total quality control the following six phases are necessary (6Cs)

i. Comprehension - What is quality? It should be definable and measurable ii. Commitment - Clarity of concept and policies organizations for it.

iii. Competence - Develop methods test procedures to evaluate quality understand the price conformance to quality.

iv. Communication - Create awareness, resolve conflicts, coordinate activities,

v. Correction - Solve problems for non conformance. They may be due to lack of attention rather than lack of knowledge or lack of facilities.

vi. Continuance - Maintain its importance and do not complacent ensure exposure to sustained programme.

Quality control standards and specifications The quality of construction depends upon right material used, the correct methods followed and produce end product of acceptable performance. Quality control attempts to ensure just that much. The means of quality control are tests, inspection, supervision and analysis of data etc. Quality tests are conducted in laboratories and inspection and supervision are carried out on the site and the data analysis is done by experts in office.Specifications:

The project authorities prepare the process of working out specifications of various facilities where concrete will be used. However, the standards and specifications for concrete and its various ingredients are universally standardized and they are required to be in conformity with same. Indian standards IS for concrete and its basic ingredients viz., cement aggregates coarse and fine, water admixtures and various aspects of concreting, its placement and final acceptance should be as per IS specifications.Tests:

Tests are used to determine the various properties of the materials, which help in their selection as well as for ascertaining the quality of final product. The test results are compared with the prescribed standards and specifications and judgements are arrived at. Proper methods of sampling, prescribed procedures of testing, well qualified and trained personnel for testing work and properly equipped laboratories are necessary.

What to test: The manufactured goods such as cement and steel carry their suppliers warrantee but this does not mean that they are not to be tested. In case of materials like aggregate and water the properties may vary widely over time and space and proper selection has to done to meet the engineering requirements.The raw materials are processed to obtain the final product. The processing need to be tested and supervised carefully. Some intermediate process may not be having tests and they cannot be tested and the inadequacies if any can known only when the final product is tested. In such situation the testing of final product is important.Statistical Quality Control:

Total quality management addresses organizational quality from managerial and philosophical viewpoint. TQM focuses on customer driven quality standards, managerial leadership, continuous improvement, quality identified problems at the source and quality made everyones responsibility. However, talking about solving quality problems is not enough. We need specific tools that helps us make the right quality decision. These tools comes from the area of statistics and are used to help identify quality problems in the production process as well as in product itself. Statistical quality control is the term used to describe the set of statistical tools used by quality professionals. Statistical quality control can be divided into three broad categories.Descriptive Statistics:

Are used to describe quality characteristics and relationships. Included are statistics such as the mean, standard deviation, the range and a measure of distribution of data.

Statistical Process Control:

Involves inspecting a random sample of the output from a process and deciding whether the process is producing products with characteristics that fall within a predetermined range. SPC answer the questions whether the process is functioning properly or not.

Acceptance Sampling:

Is the process of randomly inspecting a sample of goods and deciding whether to accept the entire lot based on the results. Acceptance sampling determines whether a batch of goods should be accepted or rejected.

Quality Assurance:

Quality assurance refers to the managerial processes which determine the organizations design, objectives and resources, the project team, funding agencies, performance standards and feedback on the project performance, appropriate actions to deal with deviations and all steps necessary for promoting quality awareness at all levels and in all parts of the project organizations.A typical quality assurance programme addresses itself to the following.

1. Organization structure of the project team and quality assurance department.

2. Responsibilities and powers of the various personnel involved.

3. Identification of the coordinating personnel.

4. Quality and its programmes.5. Quality education and awareness,

6. Quality circles.

7. Training.

8. Setting up of MIS for quality.

9. Resolution of technical differences and disputes.

10. Preparation of quality assurance manuals and their checklist.

11. Vendor survey procedures.

12. Vendor surveillance procedure

Quality assurance provides protection against quality problems through early warnings of trouble ahead. Such early warnings play an important role in the prevention of both internal and external problems. The assurance is provided from objective evidence but the type of evidence differs widely according to persons requiring the assurance and nature of product.

It need not be emphasized that quality assurance is an essential prerequisite of all construction projects. Over years the accent on quality has graduated progressively from simple Inspection to quality control to quality assurance and to quality management. Whereas the limitations of inspections are quite obvious, a quality control system includes testing of raw materials at selection and processing stage, testing at various stages of production, acceptance and feedback.MANAGEMENT RESPONSIBILITIES:Management Commitment: Top management comprises of CEO, MD, all Directors, all VPs, and Functional Heads of various departments at Head Office. The leadership (including In-charges / Managers / Heads) hold key positions at HO, and Project sites in a matrix organizational structure. Management has appointed a Management Representative and a Quality Management Cell for effective implementation and monitoring of QMS throughout organization. Management Reviews are planned at various levels for effective monitoring of QMS.

Evidence of top management commitment to development and implementation of the quality management system with a view to continually improve its effectiveness through the following manner: -

a) Communicating throughout the organization the importance of meeting customer as well as statutory and regulatory requirements.

b) Quality policy is established and displayed prominently at all site locations and Work places and is understood by all employees by discussions, training and providing printed pocket cards, which are carried by employees.c) Quality objectives for the company are established & displayed at all site locations and work places. Quality objectives are also defined for each major & critical process at Head Office level.

d) Management Review process is established and the frequency for this review is half yearly.

e) Availability of resources for implementing Quality Management System is ensured through proper planning and logistics.

Customer Focus:Responsibility: Primary Project In-Charge;

Secondary All Section Heads

Processes are established for customer communication on suggestions for improvements, information on status of project and direct meetings. Areas of dissatisfaction / improvements, if any, are discussed at various levels and informed to project site and corrective actions taken based on above inputs.Record the Customer complaint and acknowledge the receipt of the same within 3 working days.

Discuss the Customer complaint

Examine root causes.

Identify & implement corrective action

Assess Results

Inform customer Review procedure and reformulate prevention of repetitive complaint. Reply to Customer complaints with action plan and target dates for achieving the same. Communicate to customer on action taken on complaint.

Receive information about direct customer satisfaction from MIOF.

Prepare action plan on area of dissatisfaction with the consultation of all sections

Improve performance on area of dissatisfaction.Quality Policy:Top management has articulated Quality Policy

Shows commitment to comply with the requirements and continually

improve the effectiveness of the Quality Management System Provides a framework for establishing and reviewing quality objectives

Communicated and understood within the organization

The policy is communicated to all by displaying at strategic locations and through Quality manual, which is being distributed to all sections and intend being circulated to all employees of company.REFERENCES:DocumentReference No.

1. Specifications for High rise building National building by National Building codes & Mumbai Mahanagar Regional Development authority (MMRDA) building by laws

2. Technical Specifications for residential building

3. Quality Control Inspection Plan

Appendix II

4. Quality records ChecklistsAppendix III

5. Quality records Format for Internal tests

Appendix IV

6. Calibration Schedule Appendix V

7. Relevant NBC, Neuferts, IS codes & Time saver standards

Methodology:Identification of source for raw materials.

The identification for source for raw materials will be on the basis of proximity from the location of work, conformance of quality of material in accordance with requirement for the project and commercial viability.

For manufactured products, vendors are to be got approved from the engineer.

Development of Mix design / details.

Different mix designs for various grades of concrete works for High Rise Building (Frame structures) & foundations construction are to be developed at the Site Laboratory through trials. On identification and successful trial in conformity to the requirements, the details are to be supplied for adoption in construction works after due approval from the Engineer or his representative.

Quality control in Construction.

The Supervisors for Construction work will be assisted with testing equipment for monitoring of gradation, slump, temperature and for sampling / spot test of materials as and when required.

Control / checks / monitoring of levels, dimensions, profile during and after construction activities, will be done by construction engineers / survey engineers.

QC Engineers will be assigned to the Building work and Road work as and when required by the Materials Engineer of The Contractors. They will assist the respective building / Road sectional In-charges / Engineers / Supervisors for collecting test samples, performing field tests as required. Whenever required, material samples will be drawn for spot testing or tests at the site laboratory in accordance with Documents.

Conformance of Post Construction checks will be done by the respective Engineers of building and road engineer.

Marble /Granite tiling work in floors1. Marble /Granite shall be of approved quality in terms of source, thickness, colour, texture, etc.

2. Sizes of marble blocks, slabs & Tiles shall be as per Approved Drawings & specification.3. Only slabs and tiles shall be machine cut & factory made. The following tolerances shall be applied (As per CPWD Specification) in the dimensions of blocks, slabs & tiles.DimensionBlocksSlabsTiles

Length+ 2%+ 2%+ 3%

Width+ 2%+ 2%+ 3%

Thickness+ 2% + 3%+ 1%

4. Before starting of work the samples shall be approved by Client. Requirement for physical properties shall be as per CPWD Specifications as follows:

CharacteristicsRequirementsMethod of Test

1. Moisture absorption after 24 hours immersion in cold waterMaxm. 0.4% by weightIS: 1124

2. HardnessMinimum 3Mhors scale

3. Specific GravityMinimum 2.5IS: 1124

5. Each stone shall be cut to required size and chisel dressed on all bed and joints.

6. The mortar shall be as specified. All stones shall be wetted before placing in position. These shall then be floated on mortar and bedded properly in position with wooden mallets.

7. Stones shall be laid in regular courses of not less than 15 cm in height and shall be of the same height unless otherwise noted.

8. The depth of the joints 6 mm from face shall be uniform and as fine as possible but shall not be more than 1.5 mm thick.9. The curing shall be done for a period of at least 7 days. After curing it shall be rubbed with carborandum stone of different grades numbers 60,120 & 320 in succession and cleaned & washed with a solution of oxalic acid.10. Sample size & criteria of conformity shall be as follows( As per CPWD Specifications ):

Nos. of blocks/slabs/tiles in lotNos. of blocks/slabs/tiles to be selected in samplePermissible number of defectsSub-sample size in number

Upto 25302

26 to 100502

101 to 200803

201 to 5001304

501 to 10002015

Ceramic / Glazed tile flooring

Tiles shall be of approved make, size, colour & thickness.

1. Sample approvals shall be taken before start of work from client.

2. The length of all four sides shall be measured correct to 0.1 mm and average length and breadth shall not vary more than +/- 0.8 mm from specified dimensions. The tolerance for thickness shall be up to +/- 0.4 mm.

3. Base concrete (RCC slab) shall be cleaned, wetted & mopped. Bedding of cement mortar (1:3) shall be laid with average thickness 10 mm while thickness under any portion of the tiles shall not be less than 5 mm.

4. Over mortar bedding neat grey cement slurry of required consistency shall be applied @3.3 kg/m2 over an area to cover 20 tiles.

5. Tiles shall be soaked in water, washed clean and shall be fixed in this grout with gentle tapping with wooden mallet.6. Surface of flooring during laying shall be frequently checked with a straight edge about 2 mm long so as to obtain true surface with required slope.Brick Work1. The bricks shall be of class 7.5 & of non-modular type.

Bond: Generally English bond shall be followed wherever applicable, toothing and closure shall be provided.

2. Following tests shall be performed.

a) Efflorescence.

b) Crushing strength.

c) Water Absorption.

d) Dimension Check.

3. Frequency of tests/sampling shall be 20 bricks chosen randomly for every 1 lac Bricks for each brand.No. of Bricks in the lotFor characteristic specified for individual bricksFor dimensional characteristic of group of 20 bricks No. of bricks to be chosen

No. of bricks to be selectedPermissible no of defective in the sample4.

2001-1000020140

10001-3500032260

35001-5000050380

Lot sizeSampling size for compressive strength, water absorption & efflorescencePermissible No. of defective for efflorescence

2001-1000050

10001-35000100

35001-50000151

5. The mortar of brickwork shall be 1:6(1cement:6coarse sand).

6. Bricks shall be soaked in water before use for a period for the water to just penetrate the whole depth of brick.

7. Half or cut bricks shall not be used except as closures where necessary.

8. Suitable measuring boxes shall be made for measuring sand to prepare the mortar.

9. While laying the brickwork the frog should be face up. The joints shall be racked to an average depth of 10 mm. When plaster or pointing to be done the joints should be streaked flush.

10. Curing shall be done for atleast seven days or as per specification.

Plumbing and sanitation1. All water supply/plumbing installation work to be done by licensed plumbers.

2. All fittings/fixtures and accessories shall be of approved brands only. Prior approval of samples of all fittings & fixtures shall be taken from client.

3. All materials of pipes (CI, GI, Glazed stoneware, etc) shall be of approved brands only. Prior approval of samples of all Piping materials & accessories shall be taken from Client.

4. Unless otherwise specified shop drawings shall be prepared for various activities and approval of same shall be taken from Client.

5. No cross connections with waterlines of wholesome water and wastewater pipelines shall be done.External drainage1. All line out of layout designed for pipelines, manhole and inspection chambers shall be marked on the ground.

2. The trenches for underground drainage shall be excavated as per design depth and grade.

3. The required bed of slope shall be provided as per drawing in the pipeline to create required velocity.

4. For joints in the pipeline the caulking material shall be of specified quality and the same shall be executed as per drawing. Socket ends of all the pipes shall face uphill.

5. Sufficient spun yarn shall be forced into the socket and required depth should be available for filling the caulking material. If the caulking material is lead then it shall be poured in one action and when the lead is thoroughly fluid.

6. C.I. vent pipe shall be provided at the head of drain and cowl is provided at the top.

Stoneware pipes1. Pipes shall be inspected and cracked or chipped pipes shall be rejected in the work. Pipes shall be thoroughly checked and cleaned before laying.

2. The minimum diameter of the pipes for outside drainage shall not be less than that specified in the drawing.

3. The pipe trench for laying the pipes shall be of sufficient width to have easy jointing and caulking activity. The required gully traps and manholes shall be provided at the pipe junction as per drawing.

4. Testing for water tightness shall be done as required in the Specification.5. Sufficient time shall be allowed for the joints to set and then trenches filled, watered and compacted.

Sanitary and plumbing- CI pipes1. The pipes shall be checked for specified quality and its water tightness.

2. The pipes shall be laid in position with the socket ends facing uphill irrespective of the direction of flow.

3. The caulking material shall be as specified. In case of lead caulking for spigot and socket joints sufficient yarn shall be forced into the socket to have the required depth for lead for filling.

4. After completion of pipes laying in each section, water tightness shall be tested before covering with soil.

5. Unless otherwise specified, Non-return valves or check valves shall be used of brass, duly chromium polished and provided on ascending part of the main to check the return flow.

G.I. Pipes and fittings1. Pipes laid under ground shall be atleast 0.5m below G.L. or as specified on grads as specified.

2. Pipes before laying shall be checked for visible damage (broken edges, cracking or spallation of pipes) if any. If detected the defective pipes shall be rejected.

3. After laying pipes same shall be tested under water pressure at least 100 lbs per sq. inch unless otherwise specified or mentioned.

4. Joints shall be filled with cement or any other specified material with proper caulking finishing etc.

5. Pipe work shall be laid in such a way that it is accessible for inspection, replacement & repairs (as far as not to be buried in walls and solid floors).6. Service pipe or supply pipe shall be connected directly to W.C. All such suppliers should be connected from cisterns which shall be supplied from storage tank.

Plastering work1. Loose mortar if any is stuck with wall shall be brushed out.

2. Any hole filling or repairs shall be completed prior to the plastering work.

3.The wall surface shall be thoroughly washed with water, cleaned and kept wet before plastering is commenced.

4. 12 mm thick, 150mm x 150 mm square gauges shall be applied horizontally and vertically, at not more than 2.0 metre interval.

5. 1st or the undercoat coat of 12 mm plaster shall be applied in 1:5, cement: sand ratio by volume only.

6. Proper line and level with true surface shall be provided for this coat.

7. The surface shall be roughened and furrowed 2 mm deep with scratching tool / broom to form keys for the finishing coat.

8. The curing shall be continued till Finish Coat is applied.

9. The Finish coat shall be applied after the under coat is sufficiently set, but not dried and in any case within 48 hrs.

10. Sand for the second coat of plaster shall be sieved with 3.0 mm sieve.

11. The mortar for 2nd coat shall be in 1:2 cement: sand ratio by volume.

12. The 2nd or the finish coat shall be struck uniformly over the first coat and firmly pressed and levelled by using a 3.0 to 4.0 mts. Long aluminum batten.

13. All the edges, angles, arises and junctions shall be vertical and horizontal.

14. When the work is suspended at the end of the day, the plaster shall be left, cut clean to the line both horizontally and vertically. When plastering is to be resumed, the edge of the old work shall be scraped, cleaned and wetted with water before plaster is applied to the adjacent areas.

15. The surface shall than be firmly trowelled and sponge floated to remove excess moisture and bring the sand to the surface. The surface thus prepared shall be uniformly roughened for texture.

16. The surface of plaster shall be kept wet for at least 7 days and shall be protected from the sun (covering it by suitable method).

Health, Safety and Environment

The working areas will be suitably barricaded as and when required. Proper sign boards / signages shall be erected to caution / inform the surrounding people.

Personal protective equipment relevant to the nature of work will be used for the Project. Personnel handling admixtures or other chemicals will use appropriate protective equipment recommended by the manufacturer. Persons handling nuclear gauges / instruments shall wear special protective attires as recommended by the manufacturer.

Care shall be taken during dismantling the structures against fall of materials from top. All excavation shall be provided with slope or bench.

All electrical and mechanical equipment and installations shall be periodically inspected for safety and necessary maintenance work carried out.

Care shall be taken:

(i) to reduce generation of dust during operation, (ii) against pollution of water source due to construction operation (iii) against undue cutting of greenery / plants and trees.

Appendix I

Management of QC / Materials System Flowchart.

Appendix II

Quality Control Inspection Plan ( QCIP)

Sl. NOTest RequiredTest Ref.Sampling Ref & ProcessTest LocationAcceptance CriteriaTest As perTest FrequencyRemarks

Concrete Works material and field control

1Petro graphic examination of Coarse and fine aggregateCl.1007,Cl. 1008Sample from source of coarse and fine aggregate i.e quarry , river bed from where rock / boulders, sand are to be collected.ExternalIS 2386 Pt 8Initially 1 set of 3 specimens for each source of supply, subsequently when warranted by change of source / quality.

2Alkali Aggregate reactivityCl.1007,Cl. 1008Crushed sample from proposed source of coarse and fine aggregate i.e quarry , river bed from where rock / boulders, sand are to be collected.ExternalMaterial shall be InnocuousIS 2386 Pt 7Initially 1 set of 3 specimens for each source of supply, subsequently when warranted by change of source / quality.

3Specific Gravity of aggregatesCl.1007, Cl.1008-do-Site lab-IS 2386 Pt 3Initially 1 set of 3 specimens for each source of supply, subsequently when warranted by change of source / quality otherwise on monthly basis.

4Water absorption of coarse and fine aggregatesCl.1007, Cl.1008-do-Site lab-IS 2386 Pt 3Initially 1 set of 3 specimens for each source of supply.

Subsequently, one test for coarse aggregate and two tests for fine aggregate per day.

5Deleterious material for aggregate.Cl.1007, Cl.1008-do-ExternalIS 2386 Pt 2Initially 1 set of 3 specimens for each source of supply, subsequently when warranted by change of source / quality

Coarse aggregateCoal = / < 1%

Clay lump = / < 1%

Finer than 75= / < 3%

Total = / < 5%

Fine aggregateCoal = / < 1%

Clay lump = / < 1%

Finer than 75= / < 3%

Shale: = / < 1%

Total = / < 5%

6Soundness (5 cycles) of coarse aggregate

Cl. 1007-do-ExternalSodium Sulphate = / < 12%

Magnesium Sulphate = / < 18%IS 2386 Pt 5Initially 1 set of 3 specimens for each source of supply, subsequently when warranted by change of source / quality.In case for aggregate water absorption exceeds 2%

Soundness (5 cycles) of fine aggregate

Sodium Sulphate = / < 10%

Magnesium Sulphate = / < 15%

7LA abrasion value of coarse aggregateCl. 1007-doSite laba) = / < 50% for concrete

b) for concrete wearing coat = / < 30%IS 2386 Pt 4Initially 1 set of 3 specimens for each source of supply, subsequently when warranted by change of source / quality otherwise on monthly basis.

8Aggregate impact value of coarse aggregateCl. 1007-doSite laba) = / < 45% for concrete

b) for concrete wearing coat = / < 30%IS 2386 Pt 4-do-

9Flakiness Index for coarse aggregateCl. 1007Crushed aggregate from crusher or any other proposed source.Site lab= / < 35%IS 2386, Pt 1Initially 1 set of 3 specimens for each source of supply, subsequently when warranted by change of source / quality otherwise on weekly basis.

10Aggregate crushing valueCl.1007Crushed aggregate from crusher or any other proposed sourceExternal / Site lab.a) = / < 45% for concrete

b) = / < 30% for concrete wearing coat.IS 2386, Pt 4Initially at time of approval of source.

11Gradation coarse aggregateTable 900-6Crushed aggregate from proposed source.

Subsequently from stock pile at site.Site lab.-IS 2386, Pt.1Initially before mix design for approval of source. Subsequently, one test for every days work of each fraction of coarse aggregate.

12Gradation fine aggregateTable 900-6Fine aggregate from proposed source.

Subsequently from stock pile at site.Site lab. F.M. of sand shall not be >2 and < 3.5-IS 2386, Pt.1Initially before mix design for approval of source. Subsequently, one test for every days work of each fraction of coarse aggregate.Fine aggregate conforming to zone 1V as per table-4 of IS383 shall not be used for reinforced concrete.

13Gradation of all in aggregateBlended aggregateSite lab.As per IS 383 table -5IS 2386, Pt.1Initially during mix design.

Subsequently one test for every days work.

14Workability of fresh concrete ( slump test)Table 900-6At concrete batching plant and site of construction.At plant site and fieldAs per table 1700 -4IS 516 One test per each vehicle, both at concrete batching plant and site of pouring at start of work. Subsequently as required. Values stated in table 1700 4 are not for pumpable concrete. For pumpable concrete min. slump requirement is around 120 mm.For Transit Mixer minimum slump is 50 mm

15Strength of concrete Cl.1716.2.3Cube testSite lab.As per Cl.1716.2.5 IS 516As per frequency of collection of samples.

16Cement ( OPC 53 grade )Cl.1006At manufacturers plant.

At site

At site

At siteAt manufacturers lab.

-do-

-do-

At site

At site

At site

As per IS 12269

>225 m2/kg

27MPa at 3 days

>37MPa at 7days

>53MPa at 28days

Chemical RequirementsExternalAs per IS 12269

>0.80.66