What does the term "asphalt binder grade" indicate?

The term "asphalt binder grade" specifically indicates the viscosity and temperature susceptibility of the binder. Asphalt binder grades are classified based on their performance characteristics, including how they behave under varying temperatures and traffic conditions. This classification assists engineers in selecting the appropriate binder for specific climate conditions and loading scenarios, ensuring optimal performance and longevity of asphalt pavement.

High-viscosity asphalt binders perform well under high temperatures, resisting deformation, while those with lower viscosities are more suited for cold temperatures, preventing brittleness. Understanding the viscosity and temperature susceptibility is crucial for predicting how the binder will respond throughout its service life and in different environmental conditions, thus affording better design and performance of asphalt pavements.