Chemical and physical analysis
To plan your investment costs, we require preliminary raw material analyzes for your products. On the basis of a research on chemical composition and grain size, we will apply the correct technological regulation of the production process and the corresponding technological equipment - drying and baking modes. The limits of the indicators considered as promising for the production of bricks and tiles are set out in the table below. For each sample we need 25 kg of the raw material.
| № | Indicators | Measure | For bricks | For tiles |
|---|---|---|---|---|
| 1. | Molding water | % | 18-20 | 20-30 |
| 2. | Compressibility on drying | % | 4-6 | 6-9 |
| 3. | Connecting force in square state | kPa | 60-120 | 180-260 |
| 4. | Sensitivity to drying | - | to weak | to weak |
| 5. | Baking temperature | °C | 900-980 | 960-1020 |
| 6. | Fuser firing | % | 1.0 - +0.8 | 1.0 -+1.0 |
| 7. | Total compressibility | % | up to 7.0 | up to 10 |
| 8. | Loss at baking | % | up to 15 | up to 10 |
| 9. | Sensitivity to roasting | % | to weak | to weak |
| 10. | Strength / bending strength | over 5.0 MPa | over 1.2 kN | |
| 11. | Water absorption | % | over 8.0 | below 13.0 |
| 12. | Apparent density (bulk density) | kg/m³ | 1500-2100 | 1800-2200 |
| 13. | Poority | % | 15-38 | up to 25 |
| 14. | Frost resistance | cycles | over 15 | over 35 |
| 15. | Harmful substances - from lime | - | yes, if they do not reduce strengths | up to 2 pcs. with dimensions up to 10 mm |
| 16. | Water-soluble salts | degree | no | to an intermediate degree |
| 17. | Color | evenly | evenly | |
| 18. | Defects - cracks, distortions | yes, if they do not reduce strengths | 1 piece |