| RM 42 | RM 62 | RM 70 | RM 70 BF | RM 75 | ||
| Chemical composition* |
Al2O3 [%] | 42,0-45,0 | 61,0-63,0 | 69,0-72,0 | 69,0-72,0 | 73,0-76,0 |
| SiO2 [%] | 48,0-52,0 | 30,0-33,0 | 20,0-24,0 | 20,0-24,0 | 15,0-18,0 | |
| Fe2O3 [%] | 1,6-1,9 | 1,7-2,0 | 1,7-2,0 | 1,4-1,6 | 1,4-1,8 | |
| TiO2 [%] | 2,3-2,7 | 2,3-2,7 | 2,4-3,0 | 2,4-3,0 | 2,6-3,0 | |
| Physical properties |
Apparent Porosity [%] | 23,0-27,0 | 23,0-27,0 | 24,0-28,0 | 24,0-28,0 | 24,0-28,0 |
| Bulk density [g/cm3] | 2,00-2,20 | 2,10-2,30 | 2,20-2,40 | 2,20-2,40 | 2,25-2,45 | |
| Cold Crushing Strenght [MPa] | ≥ 24 | ≥ 30 | ≥ 35 | ≥ 35 | ≥ 38 | |
