How to calculate the quantity of water for a given mix concrete. As it would be required to calculate for mix 1:2:4.
As per Is code 456-200 clauses 6.1.2
maximum free water cement ratio for M15(1:2:4) is 0.50
for 1 cubic metre concrete
cement content =1/7 *1 =0.1428 m3
density of cement =1440kg/m3 (note :- density of cement varies with grade and brand)
mass of cement =0.1428*1440=205.632 kg (note:- please consider minimum cement content also i.e. also given in clauses 6.1.2 of Is code)
w/c as per IS code is 0.50 for M15
water content=0.50*205.632=102.8 m3 =103 litre
Note:-w/c depends on various factors like moisture content of fine/coarse aggregate,workability.
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