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how to convert m 25 concrete to m 40?

Answer Posted / t.madhu sudhan

By trial n error method at lab with respect to available cement, course aggregate and fine aggregate, we achieve required strength of a cube, is known as mix design, where as nominal design is taken upto M20 grade concrete to a total 1 M3, to a total quantity of about 1.51 M3 divided by their mixed proportion s

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