The percentage of the slag component of Portland-slag cement varies from:

10 to 40%

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40 to 70%

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70 to 80%

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80 to 90%

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Solution

The correct option is B 40 to 70%
Ans. (b) : As per IS 455 : 1989, Slag content in the portland slag cement varies between 25 to 65% of the total mass of mixture

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