Discussion
Which of the following would NOT reduce the heat of hydration of a cement?
Answer: A
Correct answer: raising the tricalcium aluminate content
Tricalcium aluminate has the highest heat of hydration of all the clinker compounds, so raising it increases the heat rather than reducing it. The other three all reduce it: dicalcium silicate reacts slowly and releases less heat, a pozzolana replaces some of the clinker, and coarser grinding slows the reaction and spreads the heat over a longer time.
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