#### Work Procedure for Cement Concrete Works For Mixes 1:2:4 ...

The proportion can be 1:2:4 (M15 concrete) or 1::3 for M20 concrete. The proportion of 1:2:4 concrete denotes the ratio of cement: sand: coarse aggregates by volume unless specified. Minimum compressive strength of concrete of 1:2:4 mix proportion should be 140 kg/ or .