Answer / kamalesh

For 7,14 & 28 day concrete got the strength is 65%,90% and 99%

Answer / guruprasad

In General for Nominal Mix it is considered as M20 Grade. So its 7 days and 28 days strength shall be not less than 50% and 100% respectively. For design mix it may workout to M25/M30 Grade depends upon the input material.

Answer / ceenu.143

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