9.2.1. Adhesion

Try these first

1. 1.

   Define adhesion in the context of bitumen.

   Hint

   Think about what adhesion means in everyday contexts.

2. 2.

   What happens to bitumen's adhesion in the presence of water?

   Hint

   Consider how water interacts with other materials.

3. 3.

   What is the role of adhesion in pavement construction?

   • To bind aggregates
   • To prevent water
   • To reduce traffic noise

   Hint

   Think about the purpose of every material used in road construction.

4. 4.

   True or False: Adhesion does not need to be maintained in wet environments.

   • True
   • False

   Hint

   Consider the effects of water on materials.

5. 5.

   Calculate how a 10% reduction in adhesion due to water presence could impact the expected lifespan of a pavement if normally it is 20 years.

   Hint

   Consider proportional impacts.

6. 6.

   Design an experiment to test different bitumen formulations to compare their adhesion properties under wet conditions.

   Hint

   Think about control variables and metrics you would need.