If the slump of a concrete mix is 60 mm, its workability is

The gypsum is added to the cement for

The process of hardening the concrete by keeping its surface moist is known

The surface where two successive placements of concrete meet, is known as

Ferro-concrete is another name given to Ferro = iron

The test conducted by Vicat's apparatus is for

Volume of coarse aggregate required to make 100m³ of 1:2:4 concrete is

The compaction of concrete, improves