Concrete is used in the construction of many buildings.

I'm going to drop the party tonight.

This argument is rock solid.

Reinforced concrete is widely used in building construction.

Forget it, I don't want to talk about it.

The breeze-block is used to build solid walls.

Concrete blocks are used to build strong walls.

The concrete mixer is used to mix the concrete.

The concrete work for the foundation was completed last week.

The concretings were carried out with precision.