Answer / nimmakayala

compressive strength of strength of CONRETE
M denotes mix and
20 is 20N/mm² compressive strength after 28days of curing.

Answer / guest

M means Mix
20 means compressive strength of the concrete

Answer / vijay kumar.g

M -means mix propotoins like(cement,fine aggregate,coarse aggregate and admixtures)
20-means grade of concrete (1:1.5:3)

Answer / vikas chauhan

M refers to MIX means symbol M denote MIX.
& number 20 denote the "CHARACTERISTIC COMPRESSIVE STRENGTH" in N/mm^2 or MPa after 28 days curing.
Means 20 N/mm^2 or 20 MPa (Mega Pascal)is the "characteristic compressive strength" of concrete after 28 days curing.

Answer / varun

M20means
1bag cement (2tokri of cement)
1.5 sand (3 tokri of sand)
3 aggregate (6 tokri of bajri)
1:1.5:3

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