The addition of a pozzolanic admixture such as fly ash reduces the ________

Durability of concrete is proportional to _____

Strength of concrete show an increase with _____

Reinforced cement concrete is equally strong in taking ______

Concentration of water-soluble sulphates in water _______ ppm for mild exposure.

What is internal sulphates attack?

For concrete exposed to a very aggressive environment the w/c should be lower than ______

Strength of concrete increase with _________