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Q: Which of the following is admixture that slows the chemical process of hydration?
  • A. Calcium sulphate
  • B. Acrylic Acid
  • C. Carboxylated Acrylic Ester
  • D. Acrylic polymer
Correct Answer: Option A - Calcium sulphate– It is a retarder. • It is also known as gypsum [CaSO₄] • It is admixture that slows down the chemical reaction of hydration. Ex- Tartaric acid, starch, sugar, cellulose.
A. Calcium sulphate– It is a retarder. • It is also known as gypsum [CaSO₄] • It is admixture that slows down the chemical reaction of hydration. Ex- Tartaric acid, starch, sugar, cellulose.

Explanations:

Calcium sulphate– It is a retarder. • It is also known as gypsum [CaSO₄] • It is admixture that slows down the chemical reaction of hydration. Ex- Tartaric acid, starch, sugar, cellulose.