The setting time is furtherly categorises in three phases:-
(iii)Third phase-In this phase concrete gets harden and increase its strength.
But the tension strength can be high if the steel bars are embedded in the concrete which is known as steel reinforcement.The product from this steel bar and concrete is so obtained is known as reinforced cement concrete or R.C.C.
It is further classified on:-
(ii) High alumina cement
(iv)Super sulphate cement
(v) Special cement