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The philosophy of prescribing low ____________ cement to improve resistance to sulphate attack.

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The philosophy of prescribing low ____________ cement to improve resistance to sulphate attack.

(a) C3S

(b) C3A

(c) C2S

(d) C4AF

I got this question by my college director while I was bunking the class.

Question is taken from Permeability topic in chapter Durability of Concrete of Concrete Technology

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Correct answer is (b) C3A

The best explanation: The philosophy of prescribing low C3A cement to improve resistance to sulphate attack hinges on the need to minimize ettringite formation after the concrete hardens.

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