What is an important consideration when determining the compaction of soil related to water content?

An important factor when determining the compaction of soil is the water content, as it significantly influences the soil's ability to achieve adequate compaction. When there is too little water, soil particles tend to be too dry and can remain relatively loose and unbonded, making it difficult for them to be pressed together effectively. This can lead to inefficient compaction, where the soil does not reach the desired density and strength.

On the other hand, an optimal moisture content allows for better particle interaction and bonding. If the water content is too high, it can lead to excessive pore water pressure, which may cause the soil to behave more like a liquid, leading to potential failures in the compaction process. Therefore, maintaining the right balance of water content is crucial to achieving effective and efficient soil compaction.