22.2.5. Adhesion with bitumen

Try these first

1. 1.

   What does adhesion refer to in bituminous pavements?

   Hint

   Think about how two materials stick together.

2. 2.

   Name one consequence of poor adhesion.

   Hint

   What happens when water interacts with the bitumen-aggregate bond?

3. 3.

   What is the main concern if aggregates have high affinity for water?

   • More adhesion
   • Stripping of bitumen
   • Stronger pavement

   Hint

   Think about the interaction between water and bitumen.

4. 4.

   True or False: Increasing the mixing temperature can enhance the adhesion of bitumen to aggregates.

   • True
   • False

   Hint

   Consider how temperature affects material behavior.

5. 5.

   Design a procedure for testing the adhesion of aggregates to bitumen in a lab setting. Include steps for the static immersion test and analysis of results.

   Hint

   What steps ensure both preparation and assessment of adhesion?

6. 6.

   Evaluate how different aggregate types (natural vs. manufactured) may affect adhesion. Discuss their properties and relevance.

   Hint

   What key characteristics differ between natural and manufactured aggregates?