NUMERICAL ANALYSIS OF ELECTRO-OSMOTIC FLOW IN SOILS

In this discussion, the participants report an investigation designed to study the effect of electro-osmosis and electro- chemical reaction in a marine clay. Mild steel rods were used as electrodes and a voltage gradient of 0.5 v/cm. The model was 40 cm. in length, 30 cm in width, and 14 cm in depth. Water content was maintained around liquid limit, which was 70-80 percent. To simulate the field conditions 3 percent sodium chloride solution was continously fed at the anode chamber. The total duration of electrical treatment was 40 hr followed by 28-days curing. During the experiment, net electro-osmotic flow observed was negligible. In addition to a high degree of electro-chemical reaction at the anode and cathode, exothermic reaction followed by ardening was observed midway between anode and cathode rods. Very high pH changes were noted near the zones of electrodes. With proper introduction of external suitable chemicals (calcium chloride) the strength increase was obtained from 0.050 kg/cm (square) - 12 kg/cm (square). This meant a strength increase of 240 times. The change in volume was marginal. Under such a system, it may be possible that the parameters, which were assumed to be constant in the original analysis (authors') may have serious limitation. Prior to the use of the authors' analysis for marine clays or for clays containing high salt content, the limitation of assumptions made in the authors' governing equations may have to be taken into consideration.

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  • Supplemental Notes:
    • Discussion of Proc. Paper 9912 by Roland W. Lewis and C. Humphesoa, published August 1973
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  USA  10017-2398
  • Discussers:
    • Katti, R K
    • Pavate, T V
  • Publication Date: 1974-8

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  • Accession Number: 00261636
  • Record Type: Publication
  • Report/Paper Numbers: Proc Paper 10695
  • Files: TRIS
  • Created Date: Nov 6 1974 12:00AM