| Porous concrete | Porous concrete thermally treated | Silica gel | Silica gel thermally treated |
BET surface area [m2・g−1] | 260 | 230 | 290 | 275 |
Vpore N2 [cm3・g−1]* | 0.44 | 0.42 | 0.80 | 0.78 |
Vpore total [cm3・g−1]** | 2.61 | 2.46 | 0.86 | 0.80 |