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What Is the meaning of M15 and M20
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Answer / loganathan
M15, M20, M30-M120 are the grades of CONCRETE. M stands for Mix. The numbers after M represents the STRENGTH OF THE CONCRERTE attained after 28 days of curing. say if it is M20, then the strength of that particular concrete will be 20N/mm2 (Newton per square millimetre)......
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Answer / balu
M refers to the Mix. The number followed after M refers to the Characterstic compressive strength obtained of concrete casted in 150 x 150 x 150 mm standard moulds after 28days. Ex. M15 is 15 N/Sq.mm is the Characterstic Compressive Strength after 28 days reqd.
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Answer / ravitejan
M stands for Mix
number stands for the strength of concrete which will be attain after 28 days...
strength(n/mm2)
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Answer / arun kandari
28 days of crushing strength of concrete cubes of 150*150*150mm in mPa is known grade of concrete
Exp- 15mPa. M15
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