15.3.1. Performance-Graded (PG) Binder

Try these first

1. 1.

   What does PG stand for in Performance-Graded Binder?

   Hint

   Think about what the binder classifies!

2. 2.

   What is the format for PG binder classification?

   Hint

   Consider the two temperature aspects of the classification.

3. 3.

   What does the designation PG 64-28 indicate?

   • 64°F maximum
   • -28°F minimum
   • 64°C maximum
   • -28°C minimum
   • 64°C maximum
   • -22°C minimum

   Hint

   Remember the format PG XX-YY!

4. 4.

   True or False: The Dynamic Shear Rheometer tests the low-temperature performance of binders.

   • True
   • False

   Hint

   Think about the functions of each testing device.

5. 5.

   Consider the design of a new highway in a desert environment. Which PG binder would you recommend and why? Discuss the potential performance issues if an unsuitable binder was used.

   Hint

   Think about the temperature extremes of a desert environment.

6. 6.

   Analyze the cost implications of incorrectly choosing a PG binder. Explain how this choice could affect lifecycle costs and maintenance expenditures over time.

   Hint

   Consider how material performance affects overall expenditures.