GATE Civil Engineering (CE) 2020 Shift 1 Solved Paper

Question : 21 of 65

Marks: +1, -0

During the process of hydration of cement, due to increase in Dicalcium Silicate

( {C}_{2} {S})

content in cement clinker, the heat of hydration

Does not change
Initially decreases and then increases
Decreases
Increases

Validate

Solution:

Due to increase in

{C}_{2} {S}

content, early age strength of cement is reduced indicating @ early ages like till 7 to 14 days,
The evolution of heat of hydration is less @ early ages. But increase in

{C}_{2} {S}

content contribute to later age strength i.e., rate of gain of strength in more @ later ages (after 7 to 14 days), indicating increase in heat of hydration at later ages.

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