27. Flexible pavement design

Try these first

1. 1.

   What is flexible pavement?

   Hint

   Think about how it responds to traffic.

2. 2.

   Define empirical design.

   Hint

   Focus on past experiences.

3. 3.

   What is flexible pavement designed to do?

   • Deflect under loads
   • Be rigid
   • Have one material layer

   Hint

   Focus on its characteristic feature.

4. 4.

   True or False: Empirical design does not use past data.

   • True
   • False

   Hint

   Remember how empirical methods work.

5. 5.

   Given a dual wheel assembly load of 3000 kg and a center-to-center distance of 20 cm at a depth of 30 cm, calculate the ESWL using the Boyd and Foster method.

   Hint

   Keep in mind the logarithmic calculations while using the formula.

6. 6.

   A pavement layer with a resilient modulus of 150 MPa has a constant traffic load of 1000 KN. Discuss how this modulus would influence the design of an additional layer.

   Hint

   Consider how resilient modulus affects layer thickness.