21.2.1. Desirable properties

Try these first

1. 1.

   Define stability in the context of sub grade soil.

   Hint

   Think about what happens if the soil shifts.

2. 2.

   What does incompressibility mean?

   Hint

   Consider how a sponge behaves under weight.

3. 3.

   What is the desirable property that keeps soil from deforming under loads?

   • Plasticity
   • Stability
   • Softness

   Hint

   Think about what happens when weight is applied.

4. 4.

   True or False: Incompressible soil can change volume under pressure.

   • True
   • False

   Hint

   Remember the definition of incompressibility.

5. 5.

   Evaluate a hypothetical scenario where the sub grade soil is poorly drained. Discuss the long-term effects on pavement integrity.

   Hint

   Consider the impact of weather changes on the soil.

6. 6.

   Design a layout for a highway that includes effective drainage. What materials and techniques would you use?

   Hint

   Think about how you would direct water away from the pavement.