Question { NCC, 432169 }

how do we calculate quantity of cement , sand and
aggregates in 1 m3 of M30 grade concrete ?

Answer

Calculation for Cement:-

100 cft of conc in loose 144 to 154 cft required,average of
144 and 154 is 149 cft say 150 cft.

M25 = 1:1:2=4

150cft/4=37.5cft
37.5cft/1.2=31.25bags [1 bags of cement is 1.2cft]
=31.25/2.83=11bags [1 cft = 0.0283cum x 100 cft=2.83cum]
per cum cement required=11bags

Calculation for Sand:-
11bags x 1.2 cft = 13.2 cft = 13.2 x 0.0283=0.374 cum
Per cum sand required = 0.374cum

Calculation for Aggregate:
=0.374 x 2 = 0.747 cum
per cum Aggregate required = 0.747 cum