UNDRAINED CYCLIC SHEAR BEHAVIOUR OF RECONSTITUTED SCORIA DEPOSIT

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  • AGUSTIAN YANYAN
    Interdisciplinary Graduate School of Medicine and Engineering, Natural, Biotic and Social Environment Engineering, University of Yamanashi
  • GOTO SATOSHI
    Interdisciplinary Graduate School of Medicine and Engineering, Natural, Biotic and Social Environment Engineering, University of Yamanashi

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Since scoria can be utilized in several industrial applications and the cyclic shear characteristics of scoria have not been studied sufficiently, it is important to measure the cyclic triaxial shearing response of scoria deposit. A series of laboratory tests was carried out in order to obtain the cyclic shear characteristics of scoria. Undrained cyclic triaxial tests were conducted on reconstituted scoria deposits obtained from Mt. Fuji, Yamanashi Prefecture. To evaluate the degree of particle breakage due to shearing, the grain size distribution has been evaluated before and after cyclic triaxial tests by traditional techniques. The differences in liquefaction characteristics between Scoria and other materials from previous studies were demonstrated. From the results of undrained cyclic triaxial test on the scoria, it was understood that the effect of relative density Dr on the cyclic shear strength of scoria material is small, in the range 43.8% to 97.7% of Dr. Comparison results between monotonic and cyclic triaxial tests on grain breakage due to shearing shows that the degree of grain breakage for cyclic triaxial test is relatively higher than from monotonic tests for a similar dry density.<br>

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