What is the main purpose of conducting "compaction tests" at construction sites?

The main purpose of conducting compaction tests at construction sites is to verify that soil and aggregate materials have been properly compacted for stability. Proper compaction of these materials is crucial in ensuring the structural integrity and stability of the construction. When materials are compacted correctly, it reduces air voids and increases density, which in turn minimizes settlement and enhances load-bearing capacity. This testing helps ensure that the foundations or subgrades constructed can adequately support the weight of the structures that will be built on them, preventing issues such as settlement or instability over time.

While assessing other characteristics such as color and texture, determining moisture content, or measuring excavation depth may be important when considering project specifications and preparation, they are not the primary objectives of conducting compaction tests. These factors do not directly influence the compaction process as much as the density and structure of the soil and aggregates do. Hence, the focus of compaction tests is squarely on verifying the stability provided by thorough and adequate compaction.