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Particle Crushing in Natural Soil at Large Displacements
Binod Tiwari Assistant Professor, California State University, Fullerton, CA, USA
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ABSTRACT |
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Particle Crushing in Natural Soil at Large Displacements
Binod Tiwari Assistant Professor, California State University, Fullerton, CA, USA
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ABSTRACT |
Ring shear test of 23 soil specimens from different disaster areas including landslides, slope failures, debris flows, and volcanic area showed a significant particle crushing along the shearing plane. This particle crushing caused a drop in residual shear strength. The mineralogical composition of the soil from shearing zone before and after the ring shear test did not show any significant variation. In addition, the liquid limits and plasticity indices of ball milled specimens were higher than the one tested with the ASTM procedure, which reconfirms the effect of particle crushing to yield higher clay fractions along the shearing plane. It is recommended to ball mill the natural soil specimens before conducting the ring shear test to measure the residual shear strength.
Keywords: Clay; Particle Crushing; Ring Shear; Residual Shear Strength
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