The Physicomechanical Deterioration Characteristics and Mesoscopic Damage Analysis of Sandstone under Acidic Environment
Table 3
Uniaxial compressive test results of sandstone samples subjected to acid corrosion.
Corrosion time
Soak solution
Peak stress (MPa)
(%)
Peak strain (10−3)
(%)
Elastic modulus E (GPa)
(%)
30
58.14
34.12
5.37
33.25
14.79
38.76
60
pH = 1
52.37
40.66
9.33
131.51
7.36
69.52
90
H2SO4
49.06
44.41
12.01
198.01
5.71
76.36
180
45.71
48.20
19.82
391.81
3.50
85.51
30
64.04
27.43
5.11
26.80
15.63
35.28
60
pH = 3
59.86
32.17
8.39
108.19
9.11
62.28
90
H2SO4
57.67
34.65
10.64
164.02
7.03
70.89
180
54.39
38.37
13.17
226.80
6.01
75.11
30
69.7
21.02
4.95
22.83
19.13
20.79
60
pH = 5
65.04
26.30
7.61
88.83
11.51
52.34
90
H2SO4
62.02
29.72
9.48
135.24
8.13
66.34
180
60.20
31.78
11.78
192.31
7.24
70.02
30
56.78
35.66
5.23
29.78
14.53
39.83
60
pH = 1
51.74
41.37
9.68
140.20
6.96
71.18
90
Hcl
46.91
46.84
12.65
213.90
5.08
78.96
180
41.73
52.71
20.78
415.63
2.38
90.14
30
65.55
25.72
5.03
24.81
15.88
34.24
60
pH = 3
58.17
34.08
8.96
122.33
8.54
64.64
90
Hcl
54.25
38.53
10.17
152.36
7.35
69.57
180
49.53
43.88
13.65
238.71
5.06
79.05
30
68.89
21.94
4.93
22.33
18.02
25.38
60
pH = 5
64.24
27.21
7.72
91.56
11.42
52.71
90
HCl
62.13
29.60
9.71
140.94
8.74
63.81
180
59.85
32.18
12.32
205.71
6.73
72.13
30
75.26
14.72
4.68
16.13
20.45
15.32
60
pH = 7
71.18
19.34
5.85
45.16
16.18
33.00
90
H2O
67.73
23.25
6.88
70.72
12.82
46.92
180
63.52
28.02
9.05
124.57
8.418
65.14
Nature
88.25
4.03
24.15
Note that in this table, ,, and are, respectively, peak strength, peak point axial strain, and elastic modulus of sandstone samples in a natural state.
