11.1. Introduction

Try these first

1. 1.

   What properties of bitumen make it suitable for road construction?

   Hint

   Think about what prevents water from penetrating asphalt.

2. 2.

   Name the two modified forms of bitumen discussed.

   Hint

   Both are solutions to the challenges posed by plain bitumen.

3. 3.

   What are the primary benefits of using bituminous emulsions?

   • High viscosity
   • Easy application
   • Limited use

   Hint

   Consider the state of bitumen without modification.

4. 4.

   True or False: Bituminous cutbacks are safe for the environment.

   • True
   • False

   Hint

   Think about what materials are being released during application.

5. 5.

   Evaluate how temperature affects the viscosity of bitumen and the implications for road construction projects in cold environments.

   Hint

   Consider what happens to syrup in the fridge!

6. 6.

   Consider a scenario where a specific road requires both a tack coat and a prime coat. Discuss how you would choose between using an emulsion or a cutback for each application.

   Hint

   Think about the conditions and requirements for each application.