Concrete having 28- days’ compressive strength in the range of 60 to 100 MPa.

What is the gel/space ratio?

It is a ______ method.

What is the range of water in M20?

____________ mm nominal maximum size aggregates gives optimum strength.

What is the approximate quantity of water in M7?

Where the matrix is extremely dense, a weak aggregate may become the weak.

Due to low w/c ratio _________