What is the mixture for M40 concrete?

Question

What is the mixture for M40 concrete?

Answer 1

IS 456 is considered as the Bible for Civil Engineers in India.

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[ Grades of concrete indicates compressive strength of concrete in Newtons for one mm^2 area which is called the characteristic strength of concrete after 28 days.

M40 mean 40 N/mm^2 ]

[IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35 and M40. In this designation the letter M refers to the mix and the number to the specified 28 day cube strength of mix in N/mm^2. The mixes of grades M10, M15, M20 and M25 correspond approximately to the mix proportions (1:3:6), (1:2:4), (1:1.5:3) and (1:1:2) respectively.]