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According to IRC:15-2011, maximum free W/C ratio for OPC is ________________

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According to IRC:15-2011, maximum free W/C ratio for OPC is ________________

(a) .45

(b) .4

(c) .5

(d) .55

I have been asked this question in an online interview.

Enquiry is from Road Method of Mix Design in division Concrete Mix Design of Concrete Technology

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Right answer is (a) .45

For explanation I would say: According to IRC:15-2011, maximum free water cement ratio for Ordinary Portland Cement is .45 and for PPC it’s .5.

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