What does the Proctor Test measure?

The Proctor Test measures the density of a compacted soil as a function of applied compaction energy. This is fundamental for understanding how different levels of compaction influence soil density, which in turn affects the engineering properties of the soil, such as its load-bearing capacity and stability.

During the Proctor Test, soil is compacted under controlled moisture conditions and energy levels, and then the maximum dry density and optimum moisture content are determined. This information is critical for landfill operations, as it informs how to properly compact soil for cover material or for structural fill within the landfill, ensuring adequate stability and minimizing settlement over time.

The context of the incorrect options highlights different aspects of soil analysis, such as strength, moisture content, and permeability, but they do not relate specifically to the compaction energy and resultant density assessment that the Proctor Test is designed to provide.