Research Article
Study on Mechanical Properties and Damage Characteristics of Red Sandstone under Freeze-thaw and Load
Table 2
Deterioration degree of sandstone mechanical parameters under different confining pressures.
| Freeze-thaw cycles times | Confining pressure | Deterioration degree Cn (%) | Extreme stress (MPa) | Elastic modulus (GPa) | Poisson’s ratio |
| 0 | 0 | 0 | 0 | 0 | 2 | −244.49 | −10.08 | 0.77 | 4 | −364.59 | −30.00 | 1.92 | 6 | −487.85 | −30.87 | 2.30 |
| 5 | 0 | 0 | 0 | 0 | 2 | −225.90 | −49.37 | 3.36 | 4 | −275.92 | −67.47 | 4.10 | 6 | −505.65 | −80.51 | 4.85 |
| 10 | 0 | 0 | 0 | 0 | 2 | −234.24 | −51.91 | 3.32 | 4 | −397.63 | −69.38 | 4.06 | 6 | −518.92 | −74.11 | 4.43 |
| 20 | 0 | 0 | 0 | 0 | 2 | −202.91 | −68.24 | 3.94 | 4 | −382.80 | −101.51 | 5.38 | 6 | −510.91 | −134.40 | 6.81 |
| 40 | 0 | 0 | 0 | 0 | 2 | −220.21 | −37.86 | 1.07 | 4 | −418.66 | −78.06 | 2.86 | 6 | −544.47 | −80.97 | 3.93 |
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