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Alumina in excess causes _________

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Alumina in excess causes _________

(a) Reduces the strength of the cement

(b) Inceases the strength of the cement

(c) No change

(d) Sometimes increase or decrease the strength of the cement

This question was addressed to me in an online quiz.

This question is from Types of Cement in division Types of Cement and Testing of Cement of Concrete Technology

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Correct answer is (a) Reduces the strength of the cement

The best explanation: Alumina supports to set quickly to the cement. It also lowers the clinkering temperature. Alumina in excess reduces the strength of the cement.

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