The exact mixture for block brick, based on the provided reference, uses a specific ratio of cement, sand, and stone. This ratio ensures the blocks have the necessary strength and durability.
Understanding the Standard Mix Ratio
According to the reference, a common mix ratio for block brick is 1:2:3.
- 1 part: Cement
- 2 parts: Sand
- 3 parts: Stone
This results in a total of six parts for the dry mix.
Adjusting the Mix for Mixing
It is important to note a practical adjustment required before mixing. The reference advises:
- Increase each part by about 10% before mixing in water.
Why the increase? This is because the total volume of the mixture is reduced when water is added during the mixing process. By increasing the dry components slightly (around 10%), you help ensure you have the required volume of mixed material.
Practical Application
Here's a breakdown of the components:
| Component | Ratio | Adjusted Ratio (approx. +10%) |
|---|---|---|
| Cement | 1 part | 1.1 parts |
| Sand | 2 parts | 2.2 parts |
| Stone | 3 parts | 3.3 parts |
| Total | 6 parts | 6.6 parts |
This adjusted ratio accounts for the volume loss when water is incorporated.
It is also mentioned that mixing instructions and ratios are often printed on the packaging of the cement itself, serving as a quick reference guide.
Remember that precise measurements are crucial for achieving consistent block quality. Using consistent methods for measuring "parts" (e.g., using the same bucket or container for each component) is essential, whether you are using traditional volume measurements or considering weight-based ratios for larger projects.
