19.6. Typical layers of a flexible pavement

Try these first

1. 1.

   What is the primary function of a seal coat?

   Hint

   Think about how water affects road surfaces.

2. 2.

   Name one requirement for a surface course.

   Hint

   Consider the factors related to vehicle safety.

3. 3.

   What is the primary function of the surface course in flexible pavements?

   • Load transfer
   • Waterproofing and skid resistance
   • Structural support

   Hint

   Reflect on its role as the top layer.

4. 4.

   True or False: The binder course requires the same quality material as the surface course.

   • True
   • False

   Hint

   Think about cost-effective pavement design.

5. 5.

   You are tasked with designing a flexible pavement for a highway. Discuss how you would select materials for each layer, considering the performance and cost.

   Hint

   Take into account both durability and economic factors when designing layers.

6. 6.

   Explain the implications of not properly compacting the sub-grade in a flexible pavement design.

   Hint

   Reflect on long-term maintenance and costs associated with pavement failures.