what are the diffrent kind of grades in concrete and what does
M means while specifyng the grades?
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Answer Posted / amit raval
Ordinary concrete- M10,M15,M20
Standard Concrete-M25,M30,M35,M40,M45,M50,M55
High Strength concrete-M60,M65,M70,M75,M80
Here are two grades also specified in BIS for lean concrete
M5 and M7.5
Where M refers to Mix and the given no. specified the
characteristics compressive strength of 150 mm cube after 28
days curing on normal temperature
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