Study on Hygroscopic Swelling and Dehumidification Cracking Characteristics of Expansive Soil under Acid Rain and Cyclic Drying-Wetting

Figure 10

Crack development of the sample with different pH values’ solution after four-time cyclic drying-wetting (5000 times larger). (a) pH = 7, (b) pH = 5, and (c) pH = 3.