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While considering the design of R.C. buildings for providing ductility, the minimum grade of concrete limited by the Indian Code is _________(a) M 10(b) M 20(c) M 35(d) M 50I have been asked this question by my college professor while I was bunking the class.Question is taken from Earthquake Resistant R.C. Buildings in chapter Earthquake Resistant Buildings of Construction & Building Materials

Answer»

Right CHOICE is (b) M 20

Easiest explanation: While considering the design of R.C. buildings for providing ductility, the minimum grade of CONCRETE limited by the Indian Code is M 20. The higher grade of concrete leads to a lower ULTIMATE compressive strain which results in a reduction in ductility.



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