The initial setting of cement is caused due to:

Di-calcium silicate

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tri-calcium silicate

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tri-calcium aluminate

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tri-calcium alumino ferrite

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Solution

The correct option is C tri-calcium aluminate
Ans. (c)
Tricalcium Aluminate (C $_{3}$ A) - It is responsible for the initial setting time, high heat of hydration and has greater tendency to volume changing causing cracking.

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The component of cement that has the property of setting instantaneously in presence of water and imparting initial internal strength to cement is-

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