Structural changes and hydraulic properties depending on water content during soil compaction using a rammer

Abstract

The relationship of permeability and shear properties to soil compaction curves is well known, but the mechanism has not been clearly explained. This is because it has been difficult to accurately evaluate PSD (pore size distribution). This paper clarifies the physical basis of PSD obtained from SWCC (soil water characteristic curve) and enables quantitative evaluation of the soil structure using PSD obtained from high-precision tests and SWCC. This enables quantitative evaluation of changes in soil pore structure depending on the water content during soil compaction, and clarifies the mechanism of compaction curves and hydraulic conductivities. When unsaturated sandy soil is compacted and tested after saturation, the results suggest that the water content during compaction affects the results.