Table 7 Rock mechanics parameters under different freeze–thaw cycles.
Sample grouping | Freeze–thaw cycles | Peak strength/MPa | Peak strain/% | Elastic modulus/GPa | |||
|---|---|---|---|---|---|---|---|
Test value | Mean value | Test value | Mean value | Test value | Mean value | ||
Y-1-I | Conventional samples | 79.20 | 77.03 | 0.799 | 0.795 | 12.77 | 12.66 |
Y-1-II | Conventional samples | 75.48 | 0.781 | 12.77 | |||
Y-1-III | Conventional samples | 76.42 | 0.806 | 12.45 | |||
Y-2-I | 0 | 73.39 | 72.53 | 0.745 | 0.753 | 12.07 | 12.11 |
Y-2-II | 0 | 70.89 | 0.768 | 12.18 | |||
Y-2-III | 0 | 73.30 | 0.745 | 12.07 | |||
Y-3-I | 20 | 70.75 | 69.87 | 0.774 | 0.769 | 11.80 | 11.78 |
Y-3-II | 20 | 71.06 | 0.747 | 11.82 | |||
Y-3-III | 20 | 67.80 | 0.786 | 11.71 | |||
Y-4-I | 40 | 70.39 | 66.36 | 0.760 | 0.774 | 11.30 | 10.83 |
Y-4-II | 40 | 61.07 | 0.787 | 10.60 | |||
Y-4-III | 40 | 67.61 | / | 10.60 | |||
Y-5-I | 60 | 63.20 | 64.97 | 0.751 | 0.783 | 10.50 | 10.43 |
Y-5-II | 60 | 66.13 | 0.778 | 10.30 | |||
Y-5-III | 60 | 65.59 | 0.821 | 10.48 | |||
Y-6-I | 80 | 41.3 | 41.61 | 0.780 | 0.815 | 9.23 | 9.29 |
Y-6-II | 80 | 42.77 | 0.820 | 9.16 | |||
Y-6-III | 80 | 40.75 | 0.845 | 9.48 | |||
