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Answer Posted / kiran babu t
M5, M10,used for P.C.C and now a days M15 grade of concrete
has been widely used for PCC.
Where as M20,M25 used for footings,columns,beams&slabs.
From M30 grade of concrete onwards it is Design Mix
M30,M35,M40,M45,M50,M55,M60,M65,M70,M75,M80.
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