Which of the following Bouge’s compounds of cement liberates minimum heat of hydration? 

Hydration of Bogues Compounds

- Tricalcium aluminate (C3A): Celite is the quickest one to react when the water is added to the cement. This is celit which 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): This is also called as Alite. This is also responsible for the early strength of the concrete. The cement that has more C3S content is good for cold weathering concrete. The heat of hydration is 500 J/Cal.

- Dicalcium Silicate (C2S): This compound will be undergoing reaction slowly. This is hence the factor responsible for the progressive strength of concrete. This is also called as Belite. The heat of hydration is 260 J/Cal.

- Tetracalcium Aluminoferrite (C4AF): This is called as Felite. The heat of hydration is 420 J/Cal. It has the poorest cementing value.

Compound

Heat of Hydration

C3S

500 J/gm

C4AF

420 J/gm

C3A

865 J/gm

C2S

260 J/gm