Improvement of Soft Clays by High-Voltage Electrokinetics
Publication: Journal of Geotechnical Engineering
Volume 122, Issue 4
Abstract
The theory of high-voltage electrokinetics in clay-water-electrolyte systems was developed. Upon application of a nonuniform high-voltage direct-current (DC) field to a clay-water-electrolyte system through electrically insulated electrodes, electrophoretic and dielectrophoretic forces are generated and imposed on clay particles. The former are induced by the interaction of a DC field with negatively charged clay particles, whereas the latter are induced by the interaction of the electrical diffuse double layer in a nonuniform electric field. The effects of high-voltage electric fields to the properties of a disturbed marine sediment were investigated in an experimental program. The primary experimental data indicate that high-voltage electrokinetics increased undrained shear strength of a marine sediment up to 267% and the pullout resistance of steel plates up to 88%. The effect of high-voltage electrokinetics was irreversible even long after withdrawal of the electric fields. The treatment was energy efficient and had minimal electrochemical reactions due to insulation of the electrodes.
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References
1.
Celotta, R., and Levine, J., eds. (1987). “Geophysics.”Methods of experimental physics, Vol. 24. Academic Press, Inc., Orlando, Fla.
2.
Hunter, R. J. (1981). Zeta potential in colloid science . Academic Press, New York, N.Y.
3.
Inculet, I. I., and Lo, K. Y. (1988). “Dielectric consolidation of clays.”Proc., 23rd Conf., Industry Applications Society, Institute of Electrical and Electronic Engineers, Pittsburgh, Pa., 1574–1577.
4.
Jones, T. B. (1979). “Dielectrophoretic force calculations.”J. Electrostatics. 12(1), 69–82.
5.
Lo, K. Y., Shang, J. Q., and Inculet, I. I.(1994). “Electrical strengthening of clays by dielectrophoresis.”Can. Geotech. J., 31(2), 192–203.
6.
Lo, K. Y., and Shang, J. Q.(1994). “Effect of intervening media in dielectrophoretic strengthening of clays.”Can. Geotech. J., 31(5), 607–613.
7.
Lockhart, N. C.(1983). “Dielectrophoresis in clay suspensions.”Powder Technol., 35(1), 17–22.
8.
Mitchell, J. K. (1993). Fundamentals of soil behaviour . 2nd Ed., John Wiley & Sons, New York, N.Y.
9.
Pohl, H. A. (1978). Dielectrophoresis, Cambridge University Press, New York, N.Y.
10.
Schmertmann, J. H.(1991). “The mechanical aging of soils.”J. Geotech. Engrg., ASCE, 117(9), 1288–1330.
11.
Shang, J. Q. (1993). “Electrical strengthening of clays by dielectrophoresis,” PhD thesis, Univ. of Western Ontario, London, Canada.
12.
Shang, J. Q., Lo, K. Y., and Inculet, I. I.(1994a). “Low-frequency dielectrophoresis in clay-water-electrolyte systems.”J. Electrostatics, 33(3), 229–244.
13.
Shang, J. Q., Lo, K. Y., and Inculet, I. I.(1995). “Polarization and conduction of clay-water-electrolyte systems.”J. Geotech. Engrg., ASCE, 33(2), 229–244.
14.
Shang, J. Q., Lo, K. Y., and Quigley, R. M.(1994b). “Quantitative determination of potential distribution in Stern-Gouy double layer model.”Can. Geotech. J., 31(5), 624–636.
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Copyright © 1996 American Society of Civil Engineers.
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Published online: Apr 1, 1996
Published in print: Apr 1996
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