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what are the diffrent kind of grades in concrete and what does
M means while specifyng the grades?
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Answer Posted / vaibhav mulay
Letter M represents mix (concrete mix) and the number followed after M represents the compressive strength to be attained in N/sq.mm at 28 days age when a standard cube of 150x150x150 mm is subjected to standard compressive test. Both combinedly termed as Grade of Concrete.
Thus, a concrete of M30 grade should attain a compressive strength of 30 N/sq.mm at 28 days age.
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