how to convert m 25 concrete to m 40?

Answer Posted / sjtbehera

what is the meaning of the question. basically m 40 are
desigin in weigh basis i.e desigin mix.

desigin of m25 is separate from m40 desgin. that is not a
conversion method. if you make m40 you add aditional weight
of material with m25 material.

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