Answer Posted / mahendra mohan srivastava
dear friend BIS has classifide concrete in to five
condition.1- mild, 2-modrate, 3-sever, 4- very sevier and,
5-extrem condition.
In house, mild and modrate.
in mild, PCC M15 and RCC M20.
and modrate, PCC M20 and RCC M25.
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