Effect of electric field intensity on electro-cementation of caissons in calcareous sand

Amnart Rittirong, Julie Q. Shang, Mostafa A. Ismail, Mark F. Randolph

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Effects of the electric field intensity on electro-cementation of offshore calcareous sand are studied via large-scale model tests and electric field analyses. In the experiments, the model caissons were embedded in noncemented calcareous sand recovered from the Western Australia coast, and a DC intermittent electric field was applied via a central electrode placed inside the caisson. The development of cementation in soil during electrokinetic treatment was monitored through soil shear wave measurements. After 7 days of electrokinetic treatment, the pullout resistances of the caisson model embedded in calcareous sand increased up to 105%. Significant soil cementation was observed in the vicinity of soil-caisson interfaces, which was confirmed by electro-microscopic images. The results of the performed electric field analyses show that the formation of cementing constituents in soil is directly related to the intensity of the applied electric field.

Original languageEnglish
Pages (from-to)74-79
Number of pages6
JournalInternational Journal of Offshore and Polar Engineering
Volume17
Issue number1
Publication statusPublished - 1 Mar 2007

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