Research Article
Investigation of Sandstone Mesostructure Damage Caused by Freeze-Thaw Cycles via CT Image Enhancement Technology
Table 2
Damage variables and number of damage regions.
| Freeze-thaw cycles | Fine-grained sandstone M1 | Coarse-grained sandstone A1 | AD (mm2) | Number of damage regions, N, | Df (%) | AD (mm2) | Number of damage regions, N | Df (%) |
| 0 | 23.60 | 11 | 1.25 | 32.76 | 17 | 1.64 | 20 | 45.21 | 14 | 2.39 | 114.72 | 25 | 5.74 | 40 | 93.18 | 23 | 4.94 | 560.07 | 39 | 28.06 | 60 | 175.83 | 25 | 9.33 | 830.64 | 26 | 41.62 | 80 | 469.71 | 20 | 24.92 | 902.07 | 17 | 45.20 | 100 | 497.40 | 19 | 26.39 | 1417.56 | 5 | 71.03 |
|
|