Interpreting Measurements of Small Strain Elastic Shear Modulus under Unsaturated Conditions

Hasan, A. M. and Wheeler, S. (2016) Interpreting Measurements of Small Strain Elastic Shear Modulus under Unsaturated Conditions. In: 3rd European Conference on Unsaturated Soils (E-UNSAT 2016), Paris, France, 12-14 Sept 2016, 09006. (doi:10.1051/e3sconf/20160909006)

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Bender element testing of unsaturated isotropically compacted speswhite kaolin samples was used to investigate the variation of small strain elastic shear modulus G under unsaturated conditions. Testing was performed in a suction-controlled triaxial cell and involved combinations of isotropic loading and unloading stages and wetting and drying stages. Analysis of the experimental results indicated that the variation of G could be represented by a simple expression involving only mean Bishop’s stress p* and specific volume v, with the only significant mismatches between measured and predicted values of G occuring at the end of final unloading. No significant improvement of fit was achieved by incorporating additional dependency on degree of saturation Sr or a bonding parameter ζ. The proposed expression for G reverts to a well-established form for saturated soils as Sr tends to 1.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Hasan, Mr Ahmed Mohammed and Wheeler, Professor Simon
Authors: Hasan, A. M., and Wheeler, S.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:E3S Web of Conferences
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in E3S Web of Conferences 9(2016):09006
Publisher Policy:Reproduced under a Creative Commons License

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