What does the term 'compaction' mean in the context of aggregate bases?

In the context of aggregate bases, the term 'compaction' refers to the process of densifying the aggregate to improve its load-bearing capacity. This involves applying force to the aggregate materials, which reduces the air spaces between the particles and enhances their density. By increasing the density of the aggregate, compaction helps the material to better withstand the stresses placed upon it from traffic loads, weather, and other environmental factors.

The improved load-bearing capacity is vital for ensuring the stability and longevity of pavement structures or other construction projects. Proper compaction directly influences the performance of the aggregate base, leading to a reduction in settlement and deformation over time, which is critical for maintaining the integrity of the surfaces above.