Strength and stiffness properties of an unsaturated clayey silt: experimental study at high degrees of saturation

Shire, T. and Standing, J. (2021) Strength and stiffness properties of an unsaturated clayey silt: experimental study at high degrees of saturation. International Journal of Geomechanics, 21(7), 04021094. (doi: 10.1061/(ASCE)GM.1943-5622.0002049)

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Abstract

Unsaturated constant water content triaxial compression tests with suction measurement, using an Imperial College tensiometer, and saturated consolidated undrained tests were conducted on reconstituted brickearth, a naturally unsaturated clayey silt from London. The results show that the saturated effective stress can be applied to the critical state line (CSL) and normalized stiffness for unsaturated brickearth but that Bishop's effective stress variable gives a slightly improved CSL. The stiffness derived from local instrumentation demonstrates that Bishop's effective stress is also beneficial for normalizing the stiffness modulus over the small-strain range (up to axial strains of about 3%).

Item Type:Articles
Additional Information:The authors are grateful to the Engineering and Physical Sciences Research Council (EPSRC) who funded the first author through a Doctoral Prize Fellowship.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Shire, Dr Thomas
Authors: Shire, T., and Standing, J.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:International Journal of Geomechanics
Publisher:American Society of Civil Engineers
ISSN:1532-3641
ISSN (Online):1943-5622
Published Online:21 April 2021
Copyright Holders:Copyright © 2021 American Society of Civil Engineers
First Published:First published in International Journal of Geomechanics 21(7): 04021094
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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