# Learn the method for measuring cement, sand & aggregate for M20 concrete TA0021

This construction video provides some easy-to-follow processes for measuring cement, sand and aggregate for M20 concrete TA0021. Volume of loose Concrete = 1.54 to 1.57 times Volume of dense concrete.

In order to create estimate for 1cum(supposed) of Concrete work, the following method should be followed :-

ratio Sum = 1+1.5+3=5.5

Shrinkage or safety Factor =1.57 (it is also recommended to choose 1.54)

So Total volume of wet concrete necessary is 1.57cum

Volume of broken stone Require = (3/5.5) x 1.57 = 0.856 m3

Volume of sand Require = (1.5/5.5) x 1.57 = 0.471 m3

Volume of cement = (1/5.5) x 1.57 = 0.285 m3

= 0.285 x1440 = 411 kg

For 1m3 of M20 (1:1.5:3)

Broken stone = 0.856 m3

Sand = 0.472 m3

Cement = 8.22 bag.

Method of findingthe dry ingredient quantity of 1 m3 concrete.