Answer / pitambar pradhan

Minimum it will achieve Characteristic Compressieve Strength
in 28 days N/mm2
But OPTIMUM value of tensile strength of concrete after 28
DAYS will be =target mean strength of concrete
T.M.S=(fck+1.65S)
According to B.I.S Code 10262-2009

Answer / parvender kumar

73 KN/mm2

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