What does a high compaction density indicate in an asphalt mix?

A high compaction density in an asphalt mix is an important factor that signifies better performance and resistance to deformation. When the density of an asphalt mix is high, it means that the aggregate particles are closely packed together, resulting in fewer air voids. This condition improves the mechanical properties of the mix, leading to enhanced stability and load-bearing capacity.

High compaction density minimizes the movement of the asphalt under traffic, which reduces the likelihood of rutting and deformation that can occur due to heavy loads or environmental conditions. Consequently, an asphalt surface with a high density will perform better over time, showcasing longevity and durability against wear and tear.

This performance aspect plays a crucial role in the overall effectiveness and lifespan of the pavement, making it a key indicator of quality in asphalt mixtures.