Electro-osmotic mobility measurement for kaolinite clay

J. Yin*, R. J. Finno, J. R. Feldkamp

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


Electro-osmotic mobility refers to the average velocity achieved by the pore water, relative to the solid skeleton, due to an externally applied electrical field of unit strength. Electro-osmotic mobility is usually obtained by applying a direct current to a soil specimen in an electro-osmotic cell. However, it has been noticed that certain adverse side effects, such as gas generation at electrodes, affect the accuracy of experiment results. To minimize those unwanted side effects, a non-gassing liquid electrode was employed in a cylindrical testing device. The liquid non-gassing anode consists of a copper plate, a sodium phosphate electrolyte solution and a cation exchange membrane. Six kaolinite specimen were tested. Mobility values of (0.33-1.77)×10-4 cm2/s·volt were obtained for the specimens. The variation in mobility values was believed to be associated with the difference in the specific conductance of each kaolinite specimen. Mobility and specific conductance were found to be linearly related with a correlation coefficient of 0.93.

Original languageEnglish (US)
Pages (from-to)1550-1563
Number of pages14
JournalGeotechnical Special Publication
Issue number46 /2
StatePublished - 1995
EventProceedings of the Specialty Conference on Geotechnical Practice in Waste Disposal. Part 1 (of 2) - New Orleans, LA, USA
Duration: Feb 24 1995Feb 26 1995

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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