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Advances in Civil Engineering
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2020
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Article
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Tab 4
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Research Article
Experimental Study on Physicomechanical Properties of Deep Sandstone by Coupling of Dry-Wet Cycles and Acidic Environment
Table 4
Variation of
k
value of sandstone specimen under different conditions.
Stage of A-W-D cycles
pH = 4
pH = 5
pH = 6
pH = 7
k
k
k
k
Stage I
0.960
0.970
0.974
0.983
Stage II
0.938
0.953
0.965
0.974
Stage III
0.899
0.923
0.935
0.953
Stage IV
0.849
0.886
0.905
0.924