Composite index | Open porosity w, % | Ultimate strength at compaction, MPa | Density, ρ, g/cm3 | Chemical resistance, % | |
CH-6 | 15.2 | 256 | 2.25 | water | acid |
99.82 | 99.20 | ||||
CH-7 | 15.2 | 258 | 2.31 | 99.79 | 99.25 |
CH-8 | 15.4 | 254 | 2.78 | 99.80 | 99.30 |