10.2.1. Conventional Bitumen (Penetration Grade Bitumen)

Try these first

1. 1.

   What is conventional bitumen classified by?

   Hint

   Consider how the properties of bitumen relate to its application.

2. 2.

   What does a penetration value indicate?

   Hint

   Think about what penetration means in testing.

3. 3.

   What does a penetration value of 30/40 indicate?

   • It's soft bitumen
   • It's hard bitumen
   • It's medium bitumen

   Hint

   Recall the meaning of the two numbers in the penetration grading.

4. 4.

   True or False: Softer penetration grades are advisable for high-traffic highways.

   • True
   • False

   Hint

   Think about how different bitumen types withstand traffic.

5. 5.

   A city experiences extreme winter temperatures. Analyze the implications of using a bitumen with a penetration value of 80/100 for their roadways.

   Hint

   Consider the interaction between temperature and material flexibility.

6. 6.

   Evaluate the benefits and drawbacks of using polymer modified bitumen compared to conventional bitumen in high-traffic urban areas.

   Hint

   Think about how additives can change the performance characteristics.