ELECTRO-OSMOTIC CONSOLIDATION OF SOFT BANGKOK CLAY USING COPPER AND CARBON ELECTRODES WITH PVD

The aim of this paper was to evaluate the electro-osmotic effects generated on both undisturbed and reconstituted Bangkok clays using the combination of electrodes with prefabricated vertical drains (PVDs). An additional goal was to compare the efficiency of using copper and carbon as electrodes. The experimental data was obtained from Sasanakul (2000) and Bergado et al. (2000). A lab-based test program was conducted on the samples to assess the probable effectiveness of electro-osmotic treatment. The tests were performed under the voltage gradients of 60 and 120 V/m with a polarity reversal every 24h. The time to achieve 90% degree of consolidation induced by electro-osmosis ranges from 1.4-2.1 and 1.2-2.2 times faster than the normal consolidation using PVD only for undisturbed and reconstituted samples, respectively. With its total dissolved salts of 4050 ppm, well below the 6000 ppm limit, soft Bangkok clay is thought to be well suited for electro-osmotic consolidation.

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• Authors:
  • BERGADO, D T
  • Sasanakul, I
  • Horpibulsuk, Suksun
• Publication Date: 2003-9

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 277-288
• Serial:
  • Geotechnical Testing Journal
  • Volume: 26
  • Issue Number: 3
  • Publisher: ASTM International
  • ISSN: 0149-6115
  • Serial URL: http://www.astm.org/DIGITAL_LIBRARY/JOURNALS/GEOTECH/

Subject/Index Terms

• TRT Terms: Clay soils; Electrochemical processes; Geotechnical engineering; Instruments for measuring density; Soft clays; Soil consolidation test; Soil mechanics; Soil science; Vertical drains
• Uncontrolled Terms: Electro-osmotic consolidation; Soft Bangkok clay
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00963196
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 12 2003 12:00AM