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According to IRC:15-2011, Minimum cement content for 4.5 N/mm^2 characteristic flexural strength for OPC shall _____________

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According to IRC:15-2011, Minimum cement content for 4.5 N/mm^2 characteristic flexural strength for OPC shall _____________

(a) Shall not be less than 360 kg/m^3

(b) Shall not be less than 425 kg/m^3

(c) Shall not be less than 340 kg/m^3

(d) Shall not be less than 500 kg/m^3

I had been asked this question in exam.

My question is taken from Road Method of Mix Design topic in chapter Concrete Mix Design of Concrete Technology

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The correct option is (a) Shall not be less than 360 kg/m^3

The best explanation: According to IRC:15-2011, Minimum cement content for 4.5 N/mm^2 characteristic flexural strength for OPC shall not be less than 360 kg/ m^3 and for pcc it shouldn’t be less than 425 kg/m^3.

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