From: Bohemian sandstone for restoration of cultural heritage sites: 3D microstructure and mass transport properties
Total
Percolating
Internal isolated
External isolated
solid
0.727484
0.727268
1.67 × 10− 4
4.9 × 10− 5
void
0.272516
0.272286
1.87 × 10− 4
4.3 × 10− 5