Experimental Study on Physicomechanical Properties of Sandstone under Acidic Environment

Figure 13

CT images of the middle layer of the sandstone specimens subjected to sulfuric acid solution with different pH values for different stages. (a) pH = 3 H₂SO₄ (0 day), (b) pH = 3 H₂SO₄ (30 days), (c) pH = 3 H₂SO₄ (90 days), (d) pH = 3 H₂SO₄ (180 days), (e) pH = 1 H₂SO₄ (0 day), (f) pH = 1 H₂SO₄ (30 days), (g) pH = 1 H₂SO₄ (90 days), and (h) pH = 1 H₂SO₄ (180 days).

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