Why is it important to maintain optimal moisture conditions for soil compaction?

Maintaining optimal moisture conditions for soil compaction is crucial because it significantly enhances the stability and strength of the compacted soil. When soil is compacted with the right amount of moisture, the soil particles move closer together and create a denser arrangement. This density contributes to improved load-bearing capacity, reduced settlement, and minimizes the likelihood of future displacement or failure of the compacted fill.

If the moisture content is too low, the soil may not fully contract and achieve optimal density. Conversely, if the soil is too wet, it can lead to the generation of excess pore water pressure, reducing the effective stress and compromising the stability of the soil structure. Therefore, managing moisture content is fundamental in earthwork processes to ensure that the soil remains stable and functional for its intended use.