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http://dx.doi.org/10.7843/kgs.2008.24.1.25

Experimental Study on the Triaxial Compressive Behaviour of Unsaturated Compacted Silt under Various Suction Levels  

Kim, Young-Seok (Geotechnical Disaster & Environment Research Korea Institute of Construction Technology)
Oka, Fusao (Dept. of Civil & Earth Resources Engrg, Kyoto Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.24, no.1, 2008 , pp. 25-35 More about this Journal
Abstract
It has been recognized that the behaviour of unsaturated soil plays an important role in geomechanics. However, up to now, only a few experimental data are available for the technical difficulties related to both volume changes and suction measurements. In this study, the volume changes of unsaturated compacted silty soil were monitored with proximeter during various triaxial compression tests, which gave a realistic estimation in the volume changes of unsaturated soil sample. From the test results, the behaviours of wetting-induced collapses are observed during the drainage/water absorption tests. Under exhausted-drained conditions during shearing, the shear strength increases with an increasing initial suction. On the other hand, the volume changes become small with an increase in the initial suction. And, the volumetric strain during shearing is independent of the confining pressure.
Keywords
Exhausted-drained condition; Proximeter; Suction; Triaxial compression test; Unsaturated silt;
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