The standard ratio of cement, sand, and aggregate in M20 concrete is 1:1.5:3.
Understanding the M20 Concrete Ratio
M20 grade concrete is a widely used mix known for its moderate strength, typically employed in slabs, beams, columns, and other structural elements. The 'M' stands for 'Mix', and '20' represents the characteristic compressive strength of the concrete after 28 days, measured in megapascals (MPa).
As per the provided reference, the M20 ratio is explicitly stated as 1:1.5:3. This proportion dictates the parts of each material required to create the concrete mix.
- 1 Part: Cement
- 1.5 Parts: Sand (Fine Aggregate)
- 3 Parts: Aggregate (Coarse Aggregate)
This means for every single part of cement used, 1.5 parts of sand and 3 parts of aggregates are required. The parts can be measured by volume or by weight, although volumetric batching is common on smaller sites, while weight batching is preferred for accuracy on larger or more controlled projects.
M20 Concrete Mix Proportion
To clarify the ratio visually, here is a simple representation:
| Component | Proportion (Parts) |
|---|---|
| Cement | 1 |
| Sand | 1.5 |
| Aggregate | 3 |
These materials are carefully mixed together with a specific amount of water to achieve the desired workability before the mixture hardens through hydration. The exact quantity of water used is also critical for achieving the target strength and is typically determined by the water-cement ratio.
[Concrete Mix Design]
