How does increasing temperature affect the viscosity of asphalt?

Increasing the temperature of asphalt has a direct impact on its viscosity. As the temperature rises, the molecules in the asphalt become more energetic, which decreases the internal friction between them. This reduction in friction leads to a lower viscosity, meaning the asphalt becomes more fluid and easier to handle during mixing and application processes. Consequently, a lower viscosity allows for better workability, enabling the asphalt to be spread and compacted more effectively. This is essential in paving operations, as it assures proper bonding and optimal performance of the asphalt material once it cools and solidifies.

The other options suggest that viscosity either increases with temperature or remains unaffected, which contradicts the fundamental principles of material science related to viscous fluids. Understanding this relationship between temperature and viscosity is crucial for anyone working with asphalt in construction and maintenance.