20.5. Environmental factors

Try these first

1. 1.

   What happens to the resilient modulus of asphalt when temperatures increase?

   Hint

   Think about how heat affects flexibility.

2. 2.

   What is curling in pavements?

   Hint

   Consider the shape changes of a heated object.

3. 3.

   What effect does high temperature have on the resilient modulus of asphalt?

   • Increases it
   • Decreases it
   • Does not affect it

   Hint

   Consider how heat impacts material flexibility.

4. 4.

   True or False: Curling in concrete pavements is caused by uniform temperature throughout the slab.

   • True
   • False

   Hint

   Think about heat distribution on surfaces.

5. 5.

   Given a region with high temperature fluctuations and seasonal frost, design an initial pavement structure considering both asphalt and concrete options to mitigate the adverse effects discussed in this section.

   Hint

   Balance material properties with environmental considerations.

6. 6.

   Assess the impact of inadequate drainage on a hypothetical pavement in a consistently rainy environment. What engineering solutions might counteract these negative effects?

   Hint

   Think about how water can be managed both above and below the surface.