Strength of concrete is proportional to __________

How many types of sulphates attack occur in concrete?

The separation of water or water-cement mixture from the freshly mixed concrete is known as bleeding.

Strength of concrete increase with _________

Low w/c ratio helps to control suphate attack.

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

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

Strength of concrete is _______