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According to IRC:15-2011, Minimum cement content for 4.5 N/mm^2 characteristic flexural strength for PPCshall _________(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^3I got this question in a job interview.My question is based upon Road Method of Mix Design topic in section Concrete Mix Design of Concrete Technology

Answer»

Correct OPTION is (b) Shall not be LESS than 425 kg/m^3

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 425 kg/ m^3 and for opc itshouldn’t be less than 360 kg/ m^3.



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