19.12. Problems

Try these first

1. 1.

   Define fatigue cracking.

   Hint

   Consider the term 'fatigue' in other contexts.

2. 2.

   What is rutting?

   Hint

   Think of how ruts form when tires move on a soft surface.

3. 3.

   What is a primary cause of fatigue cracking in pavements?

   • Excessive heat
   • Repeated loading
   • Low traffic volumes

   Hint

   Consider how frequent traffic affects pavement.

4. 4.

   True or False: Rutting is common in both flexible and rigid pavements.

   • True
   • False

   Hint

   Think about how each type of pavement handles load.

5. 5.

   Design a flexible pavement structure for a new highway segment expected to serve heavy traffic. Identify materials, layer thicknesses, and address potential thermal cracking issues.

   Hint

   Think of how temperature changes influence material durability.

6. 6.

   Evaluate an existing pavement showing signs of both rutting and fatigue cracking. Propose a refurbishment plan that addresses these defects.

   Hint

   Reflect on how changing existing conditions can improve overall pavement function.