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139Dy.Ex. Engr.period which is earlier. The roughness value during the second measurementsshould be judged against the following standards1) Bituminous concrete 2500 mm/Km. 2) Premix carpet 3500mm /Km.It shall be the responsibility of the contractor to make all the requiredarrangements and get this survey done in the presence of and under theguidance of the Engineer-in charge. The Survey data shall be submitted to theEngineer-in-charge for his perusal who shall decide further action to be takendepending on survey results.49 IN CASE OF CEMENT CONCRETE WORKSi) Besides manufacturer's test certificate for quality of cement, at least oneset of physical and chemical tests should be conducted for each source ofsupply of verification. Where the quality is in doubt, or where the cement hadbeen stored for long period or in improper condition, the Engineer shall call fortesting the cement at more frequent intervals.ii) Job mix formula worked out based on trials carried out in theContractor's laboratory should be got approved by the Engineer.iii) The mineral aggregates should be tested for their properties. Water tobe used for mixing should be tested for chemical impurities.iv)Checking for stability and sturdiness of formwork.v) Ensuring that the crucial equipment like mixers and vibrators are inworking order before start of work.vi) Control on water cement ratio.vii)concrete.viii)ix)Control on workability and time elapsed between mixing and placing ofControl on compaction and finishing.Tests on cube samples at 7 to 28 days.x) Check on provisions for adequate curing.xi) In case of masonry work, control should be exercised on the quality ofthe material (e.g. stone, brick, sand, cement, etc.) as also on mortarproportions.xii) For RCC work, quality of steel in each batch may be approved on thebasis of test certificate. The reinforcement layout should be checked forconformity with approved drawings and bar bending schedules. All laps shouldbe checked for conformity with the specification. The reinforcement should beSignature of Contractor No. of corrections Executive Engineer