Alumina in excess causes _____

Excess in lime causes ___

When concrete is to be laid under water _______ is to used.

Which cement is used to store for longer duration in wet climatic conditions?

Standard consistency of cement is tested by _______

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

In cement hardening process _______ instants are very important.

If t1=Time at which water is first added to cement, t2=Time when needle fails to penetrate 5 mm to 7 mm from bottom of t…