Abstract
In this research, we used frost heave test equipment to conduct a freeze-thaw cycle test and checked how the various physical properties of soil, particularly the permeability coefficient and the void ratio, changes before and after the soil froze and thawed. We employed weathered volcanic ash that has high frost susceptibility and tested the soil under tightened and loosened compacting conditions. From the test results, we confirmed that the permeability coefficient and the void ratio of compacted soil with high compaction energy is increased by the first cycle of freeze-thaw and the coefficient of permeability and the void ratio of compacted soil with low compaction energy is decreased by repeating freeze-thaw cycles. In addition, we clarified that the physical properties of the soil are changed by repeating the freeze-thaw, and finally the physical properties establish a steady state after several cycles.
