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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 / debasish pramanick
In the designation of a concrete mix,letter M refers to the mix and the number to the specified characteristic compressive strength of 15 cm. cube at 28 days,express in N/mm2.As a example M25 = 25 N /mm2 or 250 Kg./cm2 (app).
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