The rate of hydration and hydrolysis of cement depends upon its

Which of the following is an example of silicious rock?

Gneiss is chemically classified as

The compound responsible for the initial setting of cement, is

The workability of cement concrete can be improved by

Moorum is a decomposed laterite and has deep brown or red colour.

The slump test of concrete is used to measure its

The burning of bricks in kilns is complete within

The bricks after burning in kilns require about