What is the ideal moisture content range for soil compaction?

The ideal moisture content range for soil compaction is crucial for achieving optimal density and stability in construction projects. A moisture content of 5-15% typically represents the range where soil particles can effectively slide past one another, allowing for better interlocking and closer packing. This range helps minimize air pockets and voids, which can lead to reduced strength and stability.

When soil is at this moisture content, it reaches what is referred to as "optimum moisture content." At this point, the soil is wet enough to allow for effective compaction but not so wet that it becomes saturated, which can lead to a decrease in the frictional resistance between soil particles. By maintaining moisture within this ideal range, construction teams can improve the load-bearing capacity and longevity of the soil beneath structures, roads, and other infrastructure.