The mixes of grades M5 M10, M15, M20 and M25 correspond approximately to the mix proportions (1:4:8), (1:3:6), (1:2:4), (1:1.5:3) and (1:1:2) respectively.
Mixing ratio for C25 concrete is 1:2:4
Regards,
Engr. Omar Shakir
Dubai - UAE
approximately 1:1:2 (cement : fine aggregate : coarse aggregate)
as per IS code, manual mixing by proportion is possible up to M20 concrete (1:1.5:3) only and for M30 mix you have to do Mix design with all material properties.
It means the compressive strength of concrete (after 28 days from casting ) reached to 25 Mpa .
design mix generally ratio is taken in weight basis.in general we opt for 1:2:3
concrete c35 - 1:1,5:2,5 (cement,sand,aggregate)
M40 Concrete ratio 1:1.65:2.92 (cement:FA:CA)W/C ratio = 0.4As per Indian Standards.
How to mix 4500 psi cement?
1:2:41 :2:3
Ration used in M10 concrete is 1:3:6 1 Cement, 3 Sand & 6 Aggregate
concrete c35 - 1:1,5:2,5 (cement,sand,aggregate)
M40 Concrete ratio 1:1.65:2.92 (cement:FA:CA)W/C ratio = 0.4As per Indian Standards.
1:4:8
1:2:4
1:1:2
How to mix 4500 psi cement?
the strength of concrete is effected by water /cement ratio as the water/cement ratio increases the strength of the concrete decreases
1:2:41 :2:3
1:2:41 :2:3
The water/concrete ratio, not mixing it well enough, quality of raw materials, the age of the concrete, and the temperature and humidity of the area surrounding the concrete.
1:1.5:3:0.45 (cement,fine aggregate,coarse aggregate, water cement ratio)
There is no set ratio for a concrete requiring a compressive strength of m50. It is usually created according to the factors of the site condition and location.