what is design mix of M10, M20, M35, M40 grade of conconcrete?
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Answer Posted / swapan
for design mix have to keep it mind that upto M25 termed as nominal mix where there is a specific ratio for each grade of concrete suppose M15(1:2:4)/M20(1:1.5:3) but from M30 design procedure shoul follpw SP23 code.
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