Based on the provided reference, a common mixing ratio involving a highly plastic, natural product (which includes mortar clay) is 2 parts Portland cement, 1 part mortar clay, and 6 parts sand.
Understanding the Mixing Ratio
The reference describes a "Natural product [that] contains no additives and has a highly plastic quality". While the reference does not explicitly name this product "fire clay," it states that this product, which includes mortar clay, is typically used in a specific ratio when mixed with other materials. This ratio is commonly used to create a strong and durable mix, often for applications where some heat resistance or specific workability is required, typical of mixes that might involve fire clay.
The specified ratio is:
- 2 parts Portland cement
- 1 part Mortar clay
- 6 parts Sand
This ratio provides a balance of binding strength from the cement, plasticity and workability from the clay, and bulk/stability from the sand.
Components Explained
Let's break down the components of this common ratio:
- Portland Cement: This acts as the primary binder, providing strength to the cured mix.
- Mortar Clay: Described as a highly plastic, natural product, this component improves the workability of the mix and helps hold the other materials together before the cement cures. While the reference uses the term "mortar clay," fire clay is a specific type of clay known for its refractoriness (ability to withstand high temperatures), and it is often used in mixes for kilns, fireplaces, and refractory mortars. It's plausible that "mortar clay" in this context refers to a type of clay suitable for such applications, potentially including fire clay or a similar high-quality clay.
- Sand: Sand provides bulk and structure to the mix, preventing excessive shrinkage and cracking during curing.
Ratio in Detail
The ratio can be easily understood using relative parts:
| Component | Parts |
|---|---|
| Portland Cement | 2 |
| Mortar Clay | 1 |
| Sand | 6 |
For example, if you use standard measurements:
- 2 shovels of Portland cement
- 1 shovel of mortar clay
- 6 shovels of sand
Or:
- 2 buckets of Portland cement
- 1 bucket of mortar clay
- 6 buckets of sand
The key is maintaining the relative proportion of 2:1:6.
Practical Application
This specific mix ratio is suitable for various building or repair tasks where a durable, workable mortar or refractory-like material is needed. It demonstrates how a high-quality, plastic clay component (like mortar clay, or potentially fire clay depending on the application) is incorporated into a composite material to achieve desired properties.
Understanding these ratios is crucial for achieving the correct consistency, strength, and performance of the final mix.
