What is the proportion in M-20, M-25, M-30 grade of
concrete?
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Answer Posted / om prakash narayan
M-20 means lower grade use in slab casting
(1:1.5:3)
M-25(use in coulam casting - 1:1:1.5)
M-25(use in Raft and foundation use and mix Desgion not
1:1:1 ok
through Indian standard code IS:456
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