IMPROVEMENT OF SOFT CLAYS BY HIGH-VOLTAGE ELECTROKINETICS

The authors developed a theory of high-voltage electrokinetics in clay-water-electrolyte systems. Electrophoretic and dielectrophoretic forces were generated and imposed on clay particles via application of a nonuniform high-voltage direct-current (DC) field to a clay-water-electrolyte system through electrically insulated electrodes. Electrophoretic forces were induced by the interaction of a DC field with negatively charged clay particles, whereas dielectrophoretic forces were 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 examined in an experimental program. The primary experimental data revealed that high-voltage electrokinetics increased undrained shear strength of a marine sediment up to 267 percent and the pullout resistance of steel plates up to 88 percent. The irreversible effect of high-voltage electrokinetics was apparent long after withdrawal of the electric fields. The treatment was energy efficient and had minimal electrochemical reactions due to insulation of the electrodes.

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 274-280
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00720420
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 16 1996 12:00AM