Marble contains mostly lime and silica.

The workability of cement concrete can be improved by

The rate of hydration and hydrolysis of cement depends upon its

The bricks after moulding should be dried in

The compressive strength of second elass bricks should bot be less than

The average out-turn of first class bricks in clamp burning is about

The thickness of lamin boards vary from

Which of the following statement is correct?

The purpose of seasoning of timber is to