As a high purity product, CA80 contains approximately 80% of alumina, the specific properties of CA80 give high performance concretes the following properties, high refractoriness, excellent mechanical performance.
So it can be used in the refractory industry in conventional and low cement castables, which require fast setting, high early strength development, and good strength at intermediate temperatures. And the very high purity level of CA80 makes it suitable for certain refractory applications. For example: in reducing atmospheres where hydrogen or carbon monoxide is present, low silica and iron oxide are vital.
Chemical Analysis
| SiO2,% | Al2O3, % | Fe2O3, % | CaO, % | MgO, % | R2O, % | S, % | CL, % |
|---|---|---|---|---|---|---|---|
| ≤ | ≥ | ≤ | - | - | ≤ | ≤ | ≤ |
| 0.5 | 77 | 0.5 | 18.5-20.5 | - | 0.4 | 0.1 | 0.06 |
| Methods | Units | Usual range | Specification limit | ||||
|---|---|---|---|---|---|---|---|
| Fineness | d50, μm | 5-8 | ≤9 | ||||
| 325M, % | - | ≤5 | |||||
| S, m²/kg | 450-500 | ≥450 | |||||
| Setting Time | Initial Setting Time, min | 150-210 | ≥30 | ||||
| Final Setting Time, min | 210-270 | ≤300 | |||||
| Strength (ISO) | Flexural Strength, Mpa | 1d | 6-8 | ≥4.0 | |||
| 3d | 7-9 | ≥5.0 | |||||
| Compressive Strength, Mpa | 1d | 40-50 | ≥25 | ||||
| 3d | 50-60 | 30 | |||||
| Refractoriness, ℃ | 1750-1800 | ||||||
| Workable time | Short | ||||||