Abstract
In order to investigate the particle breakage properties of volcanic coarse-grained soils appeared at consolidation and shearing, a series of one-dimensional and isotropic consolidation tests, triaxial compression test and plane strain test were performed on four kinds of Hokkaido volcanic soils. Experimental results showed that there is a unique relationship between increment of finer content ΔFc produced by particle breakage and effective mean principal stress. It was also shown that the particle breakage characteristics of volcanic soils depend strongly on the effective stress path during consolidation and shearing. ΔFc induced in arbitrary stress paths can be estimated only by effective mean principal stress and effective stress ratio.
