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Dy.Ex.Engr.1 2 3 4 520 Providing and laying Mix- 10 cement concrete oftrap metal with crushed sand for head walls of crossdrainage works, retaining walls etcetra includingnecessary formwork,compaction, finishing andcuring complete.CD-8 163 1. The mix design shall be got prepared from the approvedgovernment laboratory well in advance and got approvedfrom Enineer in charge before starting the work.2. Cement from the same stock sent for design shall be usedfor concreting work.3. The rate of consumption of cement in mix design areconsidered for the work as per general practice in actualdesign ,if the cement consumption is less than that shown initem,therate will be reduced accordingly .If the rate as permix design for cement consumption is more than that as peritem ,the extra cement will have to be brought by thecontractor at his own cost.4. Before concreting work,cement form each consignmentshall be got tested .If the strength of fresh cement availablein stock and concreting work shall be done accordingly tomodified mix design.. 5. The minimum strength of reinforced cement concrete toensure durability shall as per Indian standard as per IS 456-2000 with latest ammendment .6. For each consignment of cement a sample should be gottested as per norms and frequency of Vigilance and QualityControl circle,Pune.It will be entire responsibility ofcontractor for testing of cement and no extra payment willbe made against these testing chargesContractor No.of Corrections Executive Engineer 172