The relative humidity of laboratory should be _______ for standard consistency.

The apparatus used are ___ IS Sieve, Balance capable of weighing 10g to the nearest 10mg.

Which cement is used in sewage and water treatment plants?

Which apparatus is generally used to measure the soundness of the cement?

After placing each layer in a slump cone, the concrete in the cone is tapped to remove remaining voids.

How many times in each layer of concrete rodded in a slump cone?

Initial setting time of OPC should not be less than _______

On cooling below 1250oC, C3S decomposes ________