I have recently made up 3 x 150mm concrete cubes using the mix for reinforced concrete work that being (1:2.5:3.5). I used the same water to cement ratio you suggested that is 0.57. The cubes were left to cure in the laboratory ...
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Fasi Ur Rahman
Answer- Without knowing the ultimate strength of the concrete mix, the results obtained on the 7th day can not be declared as right or wrong. Considering the results obtained on the 7th day, i.e, 8.137 N/mm2, the designed strength of the concrete mix shall be M12. The results obtained on the 7th dayRead more