Which of the following cements exhibits an exothermic reaction?

What happens when aluminous cement is mixed?

Aluminous cement, when mixed, exhibits an exothermic reaction. So the correct answer is Option c).

Exothermic Reaction of Aluminous Cement

Aluminous cement, also known as calcium aluminate cement, undergoes an exothermic reaction during its setting process. This means that it releases heat as it solidifies, leading to a temperature increase in the surrounding environment. When aluminous cement is mixed with water, it reacts with the water molecules to form calcium aluminate hydrates. This chemical reaction generates heat as a byproduct, and this heat release is what makes the process exothermic. The specific chemical reactions involved are quite complex and involve the formation of various calcium aluminate hydrate phases. This exothermic property of aluminous cement can be advantageous in certain construction applications where rapid setting and strength development are required, as the heat generated can help accelerate the curing process. However, it is essential to manage this heat to prevent any adverse effects on the structure being constructed, such as cracking due to excessive temperature rise. In contrast, Portland cement, hydraulic cement, and polymer cement do not exhibit significant exothermic reactions during their setting processes, making aluminous cement the correct choice in this context. Therefore, the correct answer is Option c).
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