from M30 onwards the mixes are designed. they dont have a const ration as in the case of mixes like M10, M15....,M25
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?
aggregates are used to concrete for following purposes: 1.if totally binding materials like cement is used in concrete, the cost of concrete will be high which is uneconomical. 2.to prevent high shrinkage of concrete mix fine aggregates are used. 3.to increase the volume of concrete mix aggregates are used.
1:2:41 :2:3
Ration used in M10 concrete is 1:3:6 1 Cement, 3 Sand & 6 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
aggregates are used to concrete for following purposes: 1.if totally binding materials like cement is used in concrete, the cost of concrete will be high which is uneconomical. 2.to prevent high shrinkage of concrete mix fine aggregates are used. 3.to increase the volume of concrete mix aggregates are used.
For M7.5 concrete, the common mix ratio is 1:4:8. This means:1 part cement 4 parts fine aggregates (sand)8 parts coarse aggregates. These ratio is by volume.
1:2:41 :2:3
1:2:41 :2:3
Target strength is the design strength which is determined by whom ever designed mixture of aggregates and the water/cement ratio.
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.