Answer / guest

M10 1:3:6
M15 1:2:4
M20 1:1.5:3
M25 1:1:2

Answer / imran

Grades are something which depends on the W/C ratio, and in today's world we generally use the pre-mixed concrete so for Graded Concrete Mix above answer is All True. but for Grades of concrete it is not applicable.
As per IS:456-2000 the minimum grade of concrete for RCC is 25 N/mm2 as per the updated Exposure conditions.

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