The strength of unsaturated bentonite-enhanced sand

Stewart, D.I., Tay, Y.Y. and Cousens, T.W. (2001) The strength of unsaturated bentonite-enhanced sand. Geotechnique, 51 (9). pp. 767-775. ISSN 0016-8505

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Abstract

A modification to Rowe’s stress-dilatancy equation is presented that extends its range of application to include unsaturated soil behaviour. The results of a programme of constant water content triaxial tests on unsaturated bentonite-enhanced sand (BES) are reported, together with those of a programme of saturated drained triaxial tests on the sand. It is shown that the variation in the rate of dilation at failure with the sand relative density is similar for the two materials. It is proposed that the packing and friction angle of the sand particles and the degree of saturation control the shear strength of unsaturated BES containing modest amounts of bentonite, and that the shear strength of the bentonite component can be ignored.

Item Type:	Article
Copyright, Publisher and Additional Information:	© The Authors and the Institution of Civil Engineers 2001
Keywords:	cut-off walls and barriers; friction; laboratory tests; partial saturation; shear strength; suction
Academic Units:	The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds) The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds) > Inst for Pathogen Control Engineering
Depositing User:	Douglas I Stewart
Date Deposited:	17 Jul 2006
Last Modified:	08 Feb 2013 17:02
Published Version:	http://dx.doi.org/10.1680/geot.51.9.767.41034
Status:	Published
Publisher:	Thomas Telford
Refereed:	Yes
Identification Number:	10.1680/geot.51.9.767.41034
Related URLs:	http://www.leeds.ac.uk/civil/staffpages/...
URI:	http://eprints.whiterose.ac.uk/id/eprint/1333

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