Which factor is most important when determining the timing of asphalt placement?

The timing of asphalt placement is primarily influenced by the temperature of the mix. Proper temperature is crucial because it affects the workability, compaction, and overall performance of the asphalt once laid. If the asphalt mix is too cold, it will become difficult to work with, leading to inadequate compaction, which can result in poor pavement performance, including deformation and cracking over time. Conversely, if placed at the right temperature, the asphalt can be compacted effectively, achieving the desired density and strength.

While the availability of equipment, the color of the asphalt, and the type of aggregate used can play roles in the logistics and aesthetics of the project, they do not directly impact the immediate quality and performance of the asphalt mix as critically as temperature does. Understanding and monitoring the thermal characteristics of the asphalt mix ensures that it adheres properly and performs well under traffic conditions.