For ensuring quality of concrete, use

Light-weight concrete is prepared by

The maximum bulking of sand occurs at a moisture content of

The concrete in which no preliminary tests are performed for designing the mix is called

For compacting plain concrete road surface of thickness less than 20 cm, we use

Di-calcium silicate (C2S)

Curing of pavements, floors, roofs and slabs, is done by

The test conducted by Vicat's apparatus is for