13.3.3. Additives and Modifiers

Try these first

1. 1.

   What is an anti-stripping agent?

   Hint

   Consider how moisture affects the mix.

2. 2.

   Name one benefit of warm mix additives.

   Hint

   Think about temperature during production.

3. 3.

   What is the main purpose of an anti-stripping agent?

   • To reduce temperature in mixing
   • To improve binder adhesion
   • To enhance color of asphalt

   Hint

   Think about the problem caused by moisture.

4. 4.

   True or False: Warm mix additives allow asphalt to be mixed at lower temperatures.

   • True
   • False

   Hint

   Recall how these additives affect production temperatures.

5. 5.

   Design a bituminous mix using a combination of additives and explain the expected performance benefits.

   Hint

   Consider how each additive affects the mix's overall performance.

6. 6.

   Evaluate the impact of a failing anti-stripping agent in a pavement structure.

   Hint

   Think about the role of moisture in asphalt and the implications for road quality.