2.8.3. Effects on Pavements

Try these first

1. 1.

   What happens to expansive soils when they get wet?

   Hint

   Think about the reaction of soils to moisture.

2. 2.

   Name one issue that can arise from pavement surface deformation.

   Hint

   Consider the types of visible damage in pavement.

3. 3.

   What is the cause of cracking in pavements supported by expansive soils?

   • Water accumulation
   • Swelling due to moisture
   • Traffic loads

   Hint

   What happens to the soil when it absorbs water?

4. 4.

   Rutting can lead to which of the following problems?

   • True
   • False

   Hint

   Think about how the pavement surface changes under load.

5. 5.

   Assess the impact of utilizing lime stabilization on a new pavement project situated over expansive soils. Discuss pros, cons, and long-term benefits.

   Hint

   Consider the trade-off between initial investment and future savings.

6. 6.

   Design a maintenance strategy for a highway that frequently experiences cracking and rutting due to expansive subgrade conditions.

   Hint

   Think about both preventative actions and responsive plans.