Answer Posted / b.santosh kumar

you have to take 1.52 as constant for calculating concrete
mix ,let me explain it this 1.52 is the quqntity of total
dry aggregate which is required.so when ever u require to
know the quantity for any given mix .u need to add up the
ratio of mix and divide 1.54 by the sum of mix ratio u ll
get the quantity of cement for one cum
eg: suppose m20 mix u need to calculate the concrete then
simply add the ratio of m20 i.e 1:1.5:3 so the total is 5.5
and divide 1.52 by 5.5 u ll get 0.27 cum of cement which ll
b required for 1 cum of concrete and if u multiply it(0.27)
by 30 u ll get the no. of cement bags .follow the same rule
for diff type of mix

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