10.2.2. Viscosity Graded Bitumen

Try these first

1. 1.

   What does VGB stand for?

   Hint

   Think about the classification method.

2. 2.

   Name one grade of viscosity graded bitumen.

   Hint

   Remember the numbering system used.

3. 3.

   What are the grades of Viscosity Graded Bitumen based on viscosity?

   • VG-10
   • VG-20
   • VG-30
   • VG-40
   • 30/40
   • 60/70
   • PMB
   • CRMB

   Hint

   Think of the viscosity measurement system.

4. 4.

   True or False: Viscosity grading is used to assess the hardness of a binder.

   • True
   • False

   Hint

   Recall the key distinction in classification methods.

5. 5.

   Suppose you are tasked with selecting a binder for a new highway in a tropical region that experiences heavy rainfall and high temperatures. What factors would you consider when recommending a viscosity graded bitumen?

   Hint

   Think of how high temperatures affect viscosity performance.

6. 6.

   Analyze the impact of switching from penetration graded bitumen to viscosity graded bitumen on project timelines and costs in a mid-latitude climate.

   Hint

   Consider the long-term versus short-term effects on the project.