it is concrete mix which gain strength 20kn/mm2 in 28 day of curing....
how much tensile strength of M20 grade concrete at 28 Days
M20
Yes. OPC 43 grade cement can be used to make M20 grade concrete.It can be used to make concrete up to M30 Grade.See related link.
what is the slump value for M20 concrete
1:2:4
M20 - 6.20bags
1:1.5:3
260 kg/cu m
m20 grade concrete per m3 load
M20 refers to the grade of the concrete generally used in construction purpose. Here, M refers to mix & number 20 refers to the characteristic strength of concrete. the proportions of this grade is (1:1 1/2: 3). Along with this there are some more grades used in constructions i.e., M5, M7.5, M10, M15, M25, M30................. M80
concrete and cement
For M20 grade concrete, the mix proportion is 1:1.5:3 (cement:sand:coarse aggregates). If we consider a volume of 1 cubic meter, approximately 320 kg of cement would be needed.