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Highway Engineering

Q1:

For maximum strength and durability minimum percentage of cement, by weight is

A 15%

B 20%

C 25%

D 30%

E 33%

ANS:D - 30%

IRC 44-2008 : Guidelines for Cement Concrete Mix Design for Pavements.

In this Guideline if we calculate the minimum cement content by percentage it comes around 13%. So, we can take 15% as the answer.

Even if we follow SP 23-1982 : Handbook on Concrete Mixes, we find from the worked out example there for M20 Concrete Minimum Cement content in percentage is 15%.



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