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Product description of refractory cement CA80
As a high-purity product, CA80 contains about 80% aluminum oxide. The special properties of CA80 enable high-performance concrete to have the following characteristics: high fire resistance and excellent mechanical properties.
Details of refractory cement CA80
Refractory cement CA80 can be used for conventional and low cement castables in the refractory industry where rapid setting, high early strength development and good medium temperature strength are required. The high purity of CA80 makes it suitable for certain refractory applications. For example, low silica and iron oxide are essential in reducing atmospheres in which hydrogen or carbon monoxide is present.
More relevant refractory products: Light weight high alumina insulation brick
Parameters of refractory cement CA80
| Products | CA75 | CA75 | CA80 | CA80 | CA80S | CA80S |
| Workable time | Moderate | Moderate | Short | Short | Longer | Longer |
| Standard | Usual range | Specification limit | Usual range | Specification limit | Usual range | Specification limit |
| SiO2, % | 0.1-0.4 | ≤0.5 | 0.1-0.4 | ≤0.5 | 0.1-0.4 | ≤0.5 |
| Al2O3, % | 73.5-75.5 | ≥73 | 78.0-80.0 | ≥77 | 78.0-80.0 | ≥77 |
| Fe2O3, % | 0.1-0.4 | ≤0.5 | 0.1-0.4 | ≤0.5 | 0.1-0.4 | ≤0.5 |
| CaO, % | 21.0-23.0 | - | 18.5-20.5 | - | 18.5-20.5 | - |
| R2O, % | - | ≤0.4 | - | ≤0.4 | - | ≤0.4 |
| S-, % | - | ≤0.1 | - | ≤0.1 | - | ≤0.1 |
| CI-, % | - | ≤0.06 | - | ≤0.06 | - | ≤0.06 |
| d50(μm) | 6-9 | ≤10 | 5-8 | ≤9 | 5-8 | ≤9 |
| 325M(%) | - | ≤5.0 | - | ≤5.0 | - | ≤5.0 |
| Specific surface areas(㎡/kg) | 420-480 | ≥400 | 450-500 | ≥450 | 450-500 | ≥450 |
| Setting time, min | ||||||
| Initial setting time IS | 150-200 | ≥150 | 150-210 | ≥30 | 210-270 | ≥180 |
| Final setting time FS | 240-300 | ≤360 | 210-270 | ≤300 | 260-320 | ≤360 |
| Flexural strength, Mpa | ||||||
| 1d | 6.5-8.5 | ≥4.0 | 6.0-8.0 | ≥4.0 | 5.5-7.5 | ≥4.0 |
| 3d | 8.5-10.5 | ≥5.0 | 7.0-9.0 | ≥5.0 | 7.0-9.0 | ≥5.0 |
| Compressive strength, Mpa | ||||||
| 1d | 42-52 | ≥25 | 40-50 | ≥25 | 35-45 | ≥25 |
| 3d | 52-62 | ≥30 | 50-60 | ≥30 | 50-60 | ≥30 |