Answer Posted / pradeep kumar

M25, actually it is design mix so we cannot say exact ratio for this grade but approximately the ratio is 1:1:2,

for preparing 1m3 of concrete, 1.5 m3 need to be taken.

Hence, 1:1:2 - 1+1+2=4,

Volume of the cement= 1/4*1.5 = 0.375
Unit weight of cement = 1440 kg/m3 
so weight of cement = 0.375*1440 = 540 Kgs.

Hence, 1 m3 of M25 grade concrete is required 540 kgs of cement 

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