What Causes Swelling Soils to Swell

question 12

Multiple Choice

What causes swelling soils to swell?

• A) When they get wet, water enters the clay mineral structure to cause swelling.
• B) The presence of abundant kaolinite clay takes water in between its layers.
• C) When water in clay-rich soil freezes, the soil swells.
• D) When an earthquake shakes wet soil, more water can get between the grains to cause swelling.
• E) Landsliding of a mass relieves pressure on soil, permitting it to expand.