C3A :Tricalcium Aluminate - Ordinary Portland Cement
#1

C3A :Tricalcium Aluminate

Liberates a large amount of heat during the first few days of hydration and hardening.
Also contributes slightly to early strength development.
Gypsum added to the cement slows down the hydration rate of C3A.
Cements with low percentages of C3A are especially resistant to soils and waters containing sulfates.
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