Experimental Investigation on Influence of Acidic Dry-Wet Cycles on Karst Limestone Deterioration and Damage
Table 4
T2 spectrum area and porosity deterioration after different dry-wet cycles in different environments.
Action environment
pH=3
pH=5
pH=7
Rock identifier
Q-10-2
Q-10-3
Z-10-1
Z-10-3
D-10-1
D-10-3
T2 spectral area after soaking once
195.285
275.908
202.799
275.728
115.524
275.908
Test porosity/%
0.372
0.484
0.431
0.296
0.242
0.344
Average porosity/%
0.428
0.363
0.293
T2 spectral area after soaking 5 times
1882.802
1679.041
1932.526
1624.719
1556.554
2648.225
Converted porosity/%
0.830
0.69
0.664
0.389
0.363
0.477
Average porosity/%
0.76
0.526
0.42
Porosity deterioration/%
123.118
42.562
54.060
31.419
50.000
38.663
Average porosity deterioration/%
82.840
42.740
44.331
T2 spectral area after soaking 10 times
2055.573
2180.602
2393.511
1963.584
1492.498
2277.309
Converted porosity/%
1.100
0.901
0.682
0.537
0.380
0.654
Average porosity/%
1.005
0.609
0.517
Porosity deterioration/%
195.699
86.157
58.237
81.419
57.025
90.116
Average porosity deterioration/%
140.928
69.828
73.571
Note: The calculation formula for porosity deterioration is ;φ0 is the initial porosity of the material, φi is the porosity of material damage after the i th dry-wet cycle.
