15.4.1. Aggregate Properties Considered

Try these first

1. 1.

   What does CAA stand for, and why is it important?

   Hint

   Think about how the shape of aggregates affects stability.

2. 2.

   What is the purpose of the Sand Equivalent Test?

   Hint

   Consider what types of materials could weaken the mix.

3. 3.

   What does CAA primarily affect in asphalt mixtures?

   • Durability
   • Interlocking
   • Moisture Susceptibility

   Hint

   Consider how shapes impact the way materials fit together.

4. 4.

   True or False: Flat and elongated particles enhance the performance of asphalt pavements.

   • True
   • False

   Hint

   Think about the implications of having non-uniform shapes.

5. 5.

   Design an asphalt mixture for a region prone to heavy rainfall. Detail how you would choose aggregates considering the discussed properties.

   Hint

   Think about how aggregates' shapes interact with water in construction.

6. 6.

   Evaluate a scenario where construction used aggregates with poor FAA values. Predict the implications on pavement performance under high traffic loads.

   Hint

   Consider how lack of stability may lead to structural failures.