Answer / balkelabal

M-10 1:3:6
M-15 1:2:4
M-20 1:1.5:3
M-25 1:1:2
M-30 depends on Design Mix

Answer / teja

M-10 1:3:6
M-15 1:2:4
M-20 1:1.5:3
M-25 1:1:3

Generally concrete grade higher than M-20 is Design Mix.

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