How does temperature affect the viscosity of asphalt binder?

The relationship between temperature and viscosity in asphalt binder is crucial for understanding its behavior during production, transportation, and application. As temperature increases, the kinetic energy of the molecules within the asphalt binder also increases. This increased energy causes the molecules to move more freely, resulting in a reduction of the internal friction between them. Consequently, higher temperatures lead to a decrease in viscosity, allowing the asphalt binder to flow more easily.

This property is particularly important in asphalt production and application because it determines how well materials can be mixed, shaped, and compacted. Maintaining the correct viscosity at the working temperature ensures that the asphalt can be adequately applied and will perform effectively in its intended use.