R.C.C (Reinforced Cement Concrete)

 P.C.C (Plain Cement Concrete):- Plain cement concrete is a hardened mass obtained from a mixture of cement, fine aggregates (sand), course aggregates (gravel) and water in definite proportions.

Plain cement concrete possesses high compressive strength but very little tensile strength and is liable to crack when subjected to tension. Therefore, it cannot be used in structure where tension is likely to develop.

Concept of reinforced cement concrete (R.C.C.):-

Plain cement concrete is very strong in compression but very weak in tension. To improve the tensile strength of plain cement concrete some sort of reinforcement is required which can take up the tensile stresses developed in the structures.

The most common reinforecement is steel which is equally strong in tension as well as in compression. Steel is high strength material as compared to concrete.

The steel used in the form of bars to reiforce the concrete is called reinforcementt.