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The component in cement which has the property of hydrating rapidly and is responsible to provide not only early strength but also the ultimate strength is


1.

Dicalcium Silicate


2.

Tricalcium Silicate


3.

Tricalcium Aluminate


4. Tetra Calcium Alumino ferrite

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Correct Answer - Option 2 :

Tricalcium Silicate


The setting and hardening of cement after addition of water is due to hydration of some of the constituent compounds of cement such as Tricalcium aluminate, Tricalcium silicate, Dicalcium silicate, and Tetra calcium aluminoferrite.

These compounds are known as Bogue’s Compounds.

Tricalcium aluminate (C3A): 

Celite 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): 

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 weather concreting. 

The heat of hydration is 500 J/Cal.

Dicalcium Silicate (C2S): 

This compound will undergo reaction slowly. It is responsible for the progressive strength of concrete. This is also called as Belite

The heat of hydration is 260 J/Cal.

Tetra calcium Alumino ferrite (C4AF): 

This is called as Felite. It has the poorest cementing value but it responsible for long term gain of strength of the cement.

The heat of hydration is 420 J/Cal.

Hence the component in cement which has the property of hydrating rapidly and is responsible to provide not only early strength but also the ultimate strength is Tricalcium silicate (C3S)

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