Answer Posted / sumathi lakshmanan

eg:1:3:6(M10)nominal mix ratio(bcoz size of coarse aggregate is 45mm) for 2 cub.m of PCC
Req:
1)PCC unit weight = 2400kg/cub.m
2)sum of ratio = 1+3+6=10
Procedure:
(1/10)*2*2400 (i.e) (ratio of cement/sum of ratio)*cub.m of PCC*unit weight of PCC =480kg of cement (9.6 or 10bags)
Therefore sand=480*3=1440kgs
Coarse agg(45mm) = 480*6=2880kgs

1.Why we are preferring 43 grade cement than 53 grade cement. 2. Approximate cost difference between 43 and 53 grade cement. Thanks.

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