At what temperature range does asphalt binder become fluid?

Asphalt binder becomes fluid within the temperature range of 265-350°F. At these temperatures, the binder's viscosity decreases significantly, allowing it to flow and be effectively mixed with aggregates during the asphalt production and application process. This fluidity is crucial for the proper compaction and performance of asphalt mixtures.

When heated to this range, the binder ensures that it can coat the aggregate particles thoroughly, promoting adhesion and resulting in a cohesive and durable pavement structure. Temperatures above or below this range may lead to challenges in achieving the desired consistency and workability of the asphalt mix.

For instance, at lower temperatures, the binder remains too viscous, making it difficult to manipulate or work with during paving. Conversely, any temperatures significantly above this range can lead to degradation of the binder, potentially harming its performance characteristics in the long term. Thus, the specified temperature range is essential for ensuring effective binder behavior and optimal pavement construction outcomes.