40 cu.m. PCC (1:5:10) is to be provided in the foundation trenches Find

Quantity of aggregate

Quantity of sand

Number of cement bags

Solution

Quantity of wet concrete – 40 cu.m.

Qty. of dry material

= 40 x 1.55 cu.m.

= 62 cu.m.

Volume of dry materials to wet concrete is taken as 1.55 : 1

Therefor, volume of cement

= (62/16) cu.m……(1:5:10)

Therefor, cement in bags

= (62/16) x ( 1 / 0.03472)

= 111.6 say 117 bags.

Volume of sand

= (62/16x) x (5/1) cu.m.

= 19.37 cu.m.

Volume of aggregate

= (62/16) x (10/1) cu.m.

= 38.74 cu.m.