Discussion
State whether the following is true or false.
Ordinary Portland cement is a blended cement because gypsum is added to it.
Answer: D
Correct answer: False
Gypsum is a set regulator added in a small quantity to every Portland cement, not a main constituent, so its presence does not make a cement blended. Ordinary Portland cement is clinker and gypsum by definition, and a blended cement is what results when a further main constituent is added.
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