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Question

Which one of the following is responsible for initial set and high heat of hydration?

A
Tricalcium Silicate
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B
Dicalcium Silicate
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C
Tricalcium Aluminate
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D
Tetracalcium AluminoFerrite
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Solution

The correct option is C Tricalcium Aluminate
The compound C3A is characteristically fast reacting with water and may lead to an immediate stiffening of paste and this process is termed as flash set. Hence, initial setting time and high heat of hydration of cement depends most on C3A.

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