3.7.3. Expansive Soils

Try these first

1. 1.

   What are expansive soils?

   Hint

   Think about how soil behaves with water.

2. 2.

   Name one stabilization method for expansive soils.

   Hint

   These are common materials used in construction.

3. 3.

   Why do expansive soils cause issues in construction?

   • They retain too much water
   • They shrink and swell
   • They are too loose

   Hint

   Consider how soil reacts to water.

4. 4.

   Stabilization of expansive soils is typically achieved through which materials?

   • Gravel
   • Lime and cement
   • Sand

   Hint

   Think of construction materials commonly used.

5. 5.

   Consider a construction project on an expansive soil site. Propose a comprehensive plan for soil stabilization and discuss the expected outcomes.

   Hint

   Think about the steps needed to prepare the soil.

6. 6.

   Analyze a case where a road was built without stabilizing expansive soils. What happened over time, and how could it have been avoided?

   Hint

   Consider the long-term effects of soil behavior.