14.2.2.2. Air Void Content in Mix

Try these first

1. 1.

   Define air void content in asphalt mixes.

   Hint

   What does air void content refer to specifically?

2. 2.

   What is one effect of excessive air voids?

   Hint

   Think about what happens to the binder when air and moisture penetrate.

3. 3.

   What does excessive air void content in a bituminous mix lead to?

   • Increased flexibility
   • Higher durability
   • Increased oxidation and moisture intrusion

   Hint

   Think about the elements that affect the structural integrity of the material.

4. 4.

   True or False: Stripping occurs when the binder adheres too strongly to aggregates.

   • True
   • False

   Hint

   Recall what stripping means in the context of binder performance.

5. 5.

   A new type of asphalt is being studied for reducing air void content. Analyze its properties that would improve durability.

   Hint

   Consider how materials interact in a mix to alter void ratios.

6. 6.

   Compare the performance of two formats of asphalt mixes: one with high air voids and one with low air voids under rainy conditions. What are the expected outcomes?

   Hint

   Think about moisture's interaction with structural integrity.