Correct option is C
Tricalcium aluminate (C3A): (Celite) it is the quickest one to react when the water is added to the cement. It is responsible for the flash setting. The increase of this content will help in the manufacture of Quick Setting Cement. The heat of hydration is 865 J/Cal.
Tricalcium silicate (C3S): (Alite) This is also responsible for the early strength of the concrete. The cement that has more C3S content is good for cold weather concreting. The heat of hydration is 500 J/Cal.
Dicalcium Silicate (C2S): (Belite) This compound will undergo reaction slowly. It is responsible for the progressive strength of concrete. The heat of hydration is 260 J/Cal.
Tetra calcium Alumino ferrite (C4AF): (Felite) The heat of hydration is 420 J/Cal. It has the poorest cementing value but it responsible for long term gain of strength of the cement.
