I Have concrete mix with 440kg opc and having 37 mpa
strengh in 7days while in 28 days only 42mpa can anybody
tell me the reason for the same.

Answer Posted / b.srinivasarao

if in OPC C3S(Tri-calcium silicate)is more than the required
percentage then we will get 90%-95% of 28 days strength in
7 days

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