|
Physical Properties (after firing) |
ASTM Classification | Class C | Class C | Class D | |||
| Max. Service Temperature (°C) | 1400 | 1400 | 1550 | ||||
|
Chemical Analysis (XRF) |
AL2O3 (%) | 42 | 45 | 52 | |||
| SiO2 (%) | 44 | 44 | 34 | ||||
| Fe2O3 (%) | 2.5 | 2.5 | 1.5 Max | ||||
|
Bulk Density (ASTM C134) |
Dried at (110°C) |
Maximum (Kg/m³) | 2100 | 2100 | 2250 | ||
|
Fired to (815°C) |
2050 | 2050 | 2100 | ||||
|
(1400°C) |
2050 | 2050 | |||||
|
(1550°C) |
2300 | ||||||
|
Cold Crushing Strength (ASTM C133) |
Dried at (110°C) |
Minimum (Kg/cm2) | 280 | 400 | 460 | ||
|
Fired to (815°C) |
200 | 200 | 230 | ||||
|
(1400°C) |
280 | 280 | |||||
|
(1550°C) |
420 | ||||||
|
Permanent Linear Change (ASTM C113) |
Fired to (815°C) |
Maximum (%) | -0.20 | -0.20 | -0.20 | ||
|
(1400°C) |
-1.50 | -1.50 | |||||
|
(1550°C) |
-1.50 | ||||||
|
Thermal Conductivity (BS 1902) |
Mean Temp. (°C) |
400 | W/mK | 0.60 | 0.60 | 0.79 | |
| 600 | 0.62 | 0.62 | 0.86 | ||||
| 800 | 0.67 | 0.67 | 0.89 | ||||