What is the purpose of compaction in asphalt paving?

The purpose of compaction in asphalt paving is primarily to establish smoothness and texture as well as to achieve the desired density and stability of the asphalt layer. Compaction involves the process of applying pressure to the asphalt mix after it has been laid down, which helps in reducing air gaps, thus increasing the density of the material. This is crucial for the longevity and performance of the pavement, as a well-compacted surface minimizes the potential for deformation, raveling, and moisture infiltration.

A smooth and properly textured asphalt surface improves vehicle traction and contributes to overall road safety. Additionally, achieving the correct compaction ensures that the asphalt can withstand traffic loads effectively without deteriorating quickly.

Other options touch on different aspects of asphalt paving, such as mixing or cooling, but they do not accurately represent the primary function of compaction, which is integral to the performance and durability of the final road surface.