GAIL (India) Limited
GAIL (India) Limited GAIL (India) Limited
333.34 SUPERVISIONAll concreting work shall be done under strict supervision of the qualified and experienced representativesof the Contractor as well as those of the Consultant The contractor’s Engineer and supervisor who are inchargeof concreting work shall be skilled in this class of work and shall personally supervise all theconcreting operations.Special attention shall be paid to the following:-(a)(b)(c)(d)Proportioning, mixing and quality testing of the materials with particular control on the watercement ratio.Laying of material in place and thorough compaction of the concrete to ensure solidity andfreedom from voids and honey combing.Proper curing for the requisite period.Reinforcement and inserts/embodiments position are not disturbed during concreting andconsolidation by vibration.3.35 QUALITY CONTROLThe Consultant/Engineer-in-charge reserves the right to make changes in the mix proportions includingthe increased cement content or/and a change in the Contractor’s control procedure, should the qualitycontrol during progress of the works prove to be inadequate in his opinion.All the concrete work shall be true to level, plumb and square within the acceptable tolerance.corners, edges and rises in all cases shall be unbroken and finished properly and carefully.The3.36 TOLERANCESThe acceptable tolerances for formed concrete surfaces shall be given below: -a) Variation from plumb for -i. Columns and walls to be rendered 6 mm in 3 metersii. Exposed columns and walls 3 mm in 3 metersb) Variation in cross sectional dimensions of columns and beams and in the thickness of slabs andwalls: - 6 mm & + 12 mmAll the works executed beyond the tolerance limits are liable to be rejected and no extra cost shall be paidto the contractor for reconstructing the same as desired by the Consultant/Engineer-in-charge.3.37 TESTING ROOMA testing room of not less than 10 sqm equipped with the following apparatus and qualified concretetechnician, labour and materials required for carrying out tests therein shall be provided by the contractorat his own cost:1. Sieve Set (For aggregate 20 mm down)40 mm, 20 mm, 16 mm, 12.5 mm, 10 mm, 4.75 mm, 600 micron, 300 micron, and 75 micron havingdiameter of 45 cms.2. Weighinga) Physical balance cap. 200 gms with weigh box (accuracy 0.5 gm)b) Counter Scale cap 20 Kgc) Weights5 kg 1 No 500 gms 1 No.2 kg 2 Nos. 200 gms 1 No.
341 kg 1 No. 100 gms 1 No.3. Slump Cones 2 Nos4. 15 cms moulds 18 no.5. Electric/Kerosene Heater6. pans etc. as directed by the Consultant7. Measuring Cylinders of 1000 ml., 500 ml and 100ml.8. Wash bottles of the Capacity of 500 ml., 2 Nos.9. Sink10. Work benches, shelves, desks and any other furniture and lighting as required by the Consultant.11. Spring balance dial type cap. 100 kg12. Litre measuresa) 10 Lit 1 No.b) 5 Lit 1 No.c) 2 Lit 2 Nosd) 1 Lit 1 No.e) 1/2 Lit 1 No.13. Cube Testing Machine 100 Tons.14. Oven.15. Cores/ Apparatus for conducting Proctor Density Tests.3.38 CO-ORDINATION OF WORKThe contractor is fully responsible for coordinating with the other agencies for sanitary, electrical work,etc. to ensure execution of their work related to commencement of concreting. Nothing extra shall bepayable to the contractor, if the works pertaining to concreting have to be dismantled and redone due tolack of co-ordination on the part of the contractor in ensuring completion of works of such agenciesbefore concreting had been undertaken.4 SPECIFICATIONS FOR STEEL REINFORCEMENT4.1 GENERAL4.1.1 DESCRIPTIONThis section covers the requirements for fabricating, delivering and placing of steel reinforcement inposition for casting all types of concrete work4.1.2 RELATED WORK SPECIFIED ELSEWHEREApplicable Codes and Standards:The codes and standards generally applicable to the work this section is listed in this section.IS: 280IS: 432IS: 456IS: 1139IS: 1566IS: 2502Mild wire for general engineering purposePart I Mild steel and medium tensile steel barsPart II Hard drawn steel wireCode of practice for plain and reinforced concreteHot rolled mild steel, medium tensile steel and high yield strength steel deformed barsfor concrete reinforcementHard drawn steel wire fabric for concrete reinforcementCode of Practice for bending and fixing of bars for concrete reinforcementThe following clauses are intended to amplify the requirements of the reference documents listed aboveand the contractor/Engineer-in-charge shall comply with these clauses.
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- Page 15 and 16: 143.6.3 WATERWater used in the work
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- Page 19 and 20: 183.13 DurabilityThe durability of
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- Page 23 and 24: 22placement of concrete, the surfac
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- Page 27 and 28: 262. Test for organic impurities.3.
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- Page 33: 32The joint filler shall be easily
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- Page 41 and 42: 40Oiling shall be done before reinf
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- Page 45 and 46: 446.3 RUBBLE MASONRY:-6.3.1. MATERI
- Page 47 and 48: 467.1.1.2 Hard Wood:Hard wood shall
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- Page 51 and 52: 50finish with minimum anodic film t
- Page 53 and 54: 52The tiles shall generally conform
- Page 55 and 56: 54Plaster as herein specified shall
- Page 57 and 58: 5612.9.5 FLOATING COAT OF NEAT CEME
- Page 59 and 60: 5813.1.a3 Preparation of Surface:Th
- Page 61 and 62: 6014.1.2 Preparation of surface:Pre
- Page 63 and 64: 62solution generously with brush. A
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- Page 73 and 74: 722.6 For all pipes, work shall be
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- Page 79 and 80: 781.15 ANGLE VALVEAngle valve shall
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333.34 SUPERVISIONAll concreting work shall be done under strict supervision of the qualified and experienced representativesof the Contractor as well as those of the Consultant The contractor’s Engineer and supervisor who are inchargeof concreting work shall be skilled in this class of work and shall personally supervise all theconcreting operations.Special attention shall be paid to the following:-(a)(b)(c)(d)Proportioning, mixing and quality testing of the materials with particular control on the watercement ratio.Laying of material in place and thorough compaction of the concrete to ensure solidity andfreedom from voids and honey combing.Proper curing for the requisite period.Reinforcement and inserts/embodiments position are not disturbed during concreting andconsolidation by vibration.3.35 QUALITY CONTROLThe Consultant/Engineer-in-charge reserves the right to make changes in the mix proportions includingthe increased cement content or/and a change in the Contractor’s control procedure, should the qualitycontrol during progress of the works prove to be inadequate in his opinion.All the concrete work shall be true to level, plumb and square within the acceptable tolerance.corners, edges and rises in all cases shall be unbroken and finished properly and carefully.The3.36 TOLERANCESThe acceptable tolerances for formed concrete surfaces shall be given below: -a) Variation from plumb for -i. Columns and walls to be rendered 6 mm in 3 metersii. Exposed columns and walls 3 mm in 3 metersb) Variation in cross sectional dimensions of columns and beams and in the thickness of slabs andwalls: - 6 mm & + 12 mmAll the works executed beyond the tolerance limits are liable to be rejected and no extra cost shall be paidto the contractor for reconstructing the same as desired by the Consultant/Engineer-in-charge.3.37 TESTING ROOMA testing room of not less than 10 sqm equipped with the following apparatus and qualified concretetechnician, labour and materials required for carrying out tests therein shall be provided by the contractorat his own cost:1. Sieve Set (For aggregate 20 mm down)40 mm, 20 mm, 16 mm, 12.5 mm, 10 mm, 4.75 mm, 600 micron, 300 micron, and 75 micron havingdiameter of 45 cms.2. Weighinga) Physical balance cap. 200 gms with weigh box (accuracy 0.5 gm)b) Counter Scale cap 20 Kgc) Weights5 kg 1 No 500 gms 1 No.2 kg 2 Nos. 200 gms 1 No.
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