Critical state behaviour of an unsaturated high-plasticity clay

Title: Critical state behaviour of an unsaturated high-plasticity clay
Creator: Burton, Glen J.; Sheng, Daich Ao; Airey, David W.
Relation: Géotechnique Vol. 70, Issue 2, p. 161-172
Publisher Link: http://dx.doi.org/10.1680/jgeot.18.P.178
Publisher: Institution of Civil Engineers (ICE)
Resource Type: journal article
Date: 2020
Description: This paper describes a series of tests carried out to examine triaxial compression and shearing of a high-plasticity compacted clay. Reconstituted and compacted samples which were saturated are used as a basis for interpreting the unsaturated test results within a critical state soil mechanics (CSSM) framework. The shear strength behaviour of unsaturated soils have previously been found to be reasonably well captured in a CSSM framework, whereas the volume change behaviour has been more difficult to rationalise. Based on test results presented using the Bishop effective stress, the volume change behaviour during shear suggests that a unique critical state line is approached, independent of the applied suction. The normalised shearing behaviour of the compacted unsaturated soil is interpreted to be analogous to that of saturated-structured soils.
Subject: clays; consolidation; expansive soils; partial saturation; shear strength; suction
Identifier: http://hdl.handle.net/1959.13/1432417
Identifier: uon:39050
Identifier: ISSN:0016-8505
Language: eng
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