Jun 29, 2021
Pure Calcium Aluminate Cement
Pure Calcium Aluminate Cement Application
Calcium aluminate CA-70/80 is used for manufacturing good property (low water, low cement) refractory castable, or unshaped bulk refractory materials, which are used in high temperature, high pressure, and reducing condition. It is also high quality binder of refractory castable, which is extensively applied in chemical industry, metallurgical industry, building material, petroleum industry, ceramic industry etc.
Pure Calcium Aluminate Cement Features
Refractoriness under load is high; strength in working temperature is high; resistance to erosion is good. For high purity, it has high erosion resistance to reducing medium such as Co, H2, and CH4.
The early strength and strength in medial temperature of CA-70/80 are both high.
Refractoriness is more than 1650°C.
Pure Calcium Aluminate Cement Physical & Chemical Indicators
| Type | CA70 | CA80 | |
| Chemical content (%) | SiO2 | ≤1.0 | ≤0.5 |
| Al2O3 | ≥68.0 | ≥77.0 | |
| Fe2O3 | ≤0.7 | ≤0.5 | |
| R2O | ≤0.4 | ≤0.4 | |
| S | ≤0.1 | ≤0.1 | |
| Cl | ≤0.1 | ≤0.1 | |
| 325M screen residue (%) | ≤5 | ≤5 | |
| S (m2/kg) | ≥400 | ≥450 | |
| Initial setting time (min) | ≥45 | ≥45 | |
| Final setting time (h) | ≤6 | ≤6 | |
| Bending Strength (MPa) | 6h | —— | —— |
| 1d | ≥5.5 | ≥5.0 | |
| 3d | ≥6.5 | ≥6.0 | |
| Compressive strength (MPa) | 6h | —— | —— |
| 1d | ≥40 | ≥30 | |
| 3d | ≥50 | ≥40 | |