What is the main purpose of compaction in construction?

The primary purpose of compaction in construction is to compress and reduce the volume of soil or other materials. This process is crucial as it enhances the density of materials, which in turn increases their load-bearing capacity and stability. When soil is compacted, air pockets are reduced, preventing the ground from settling over time, which can cause structural issues and uneven surfaces. Compaction is especially important during the preparation of subgrades for roads, foundations, and other infrastructure, ensuring that the materials provide a solid, stable base for construction.

The other options do not address the fundamental goal of compaction, which is to achieve structural integrity through density enhancement rather than aesthetic improvements or surface decoration.