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Chapter 35 The use of electrokinetic geosynthetics (EKG) to improve soft soils

Lookup NU author(s): Professor Stephanie Glendinning, Emeritus Professor Colin Jones, Dr John Lamont-Black

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Abstract

The usual applications of geosynthetics are related to the civil engineering and environmental industries and are well established as providing filtration, separation, reinforcement, and drainage and acting as barriers. In use conventional geosynthetic materials have a passive role, e.g. barriers stop the passage of liquids; reinforcement provides tensile resistance and drains provide a passage for water. New applications for geosynthetics can be identified if the geosynthetic can provide an active role, initiating chemical or physical change to the soil matrix in which it is installed as well as providing the established functions. This can be achieved by creating electrically conducting geosynthetics and combining electrokinetic functions with established functions. The main electrokinetic functions that can be used in geotechnical engineering are electrophoresis and electroosmosis, these are little used at present mainly due to inherent problems associated with electrode corrosion. The new development of electrically conductive geosynthetics has overcome the technical problems of applying electro-osmosis techniques to practical problems. As electrokinetics are little understood the first part of the chapter explains the physics and the parameters which influence the performance of electro-osmosis and describes the different testing requirements needed for design. The design and construction of a full-scale reinforced fill wall built using fill in the form of a slurry is covered in detail. This illustrates the benefits that can be gained using electrically conductive geosynthetics. Finally, a number of different applications of electrically conductive geosynthetics are described. © 2005 Elsevier Ltd. All rights reserved.


Publication metadata

Author(s): Glendinning S, Jones C, Lamont-Black J

Publication type: Article

Publication status: Published

Journal: Elsevier Geo-Engineering Book Series

Year: 2005

Volume: 3

Issue: C

Pages: 997-1043

Print publication date: 01/01/2005

ISSN (print): 1571-9960

ISSN (electronic):

Publisher: Elsevier Ltd

URL: http://dx.doi.org/10.1016/S1571-9960(05)80038-2

DOI: 10.1016/S1571-9960(05)80038-2


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