Experiments and dimensional analysis of contaminated clay soils

Amin Soltani, Ali R. Estabragh, Abbas Taheri, An Deng, Jay N. Meegoda

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

An experimental programme was developed to investigate the influence of three viscous-dominant contaminants on the stress-strain response of clay soils. Four degrees of contamination (by weight) - that is, Cc = 2, 4, 6 and 8% - were examined. Natural and contaminated samples were prepared at their respective Proctor optimum condition and further subjected to unconfined compression tests. The dimensional analysis concept was implemented to quantify the stress-strain response. A sensitivity analysis with respect to the proposed dimensional models was also performed to examine the impact of various contamination scenarios on the strength properties. Lubrication at the particle contact level caused by the viscous nature of the contaminant agent portrayed a significant role in describing the stress-strain response. The stress-strain relationship was adversely affected by contamination. Peak strength and stiffness were inversely related to contaminant viscosity μc and Cc, with the former representing a more dominant role. An increase in μc and/or Cc, however, promoted a notable improvement in the ductility. The predictive capacity of the proposed dimensional models was examined and validated by statistical techniques. The proposed models contain a limited number of fitting parameters, which can be calibrated by minimal experimental effort and hence implemented for predictive purposes.

Original languageEnglish (US)
Pages (from-to)434-449
Number of pages16
JournalEnvironmental Geotechnics
Volume6
Issue number7
DOIs
StatePublished - Dec 21 2017

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Water Science and Technology
  • Geotechnical Engineering and Engineering Geology
  • Waste Management and Disposal
  • Geochemistry and Petrology
  • Nature and Landscape Conservation
  • Management, Monitoring, Policy and Law

Keywords

  • Contaminated material
  • Statistical analysis
  • Strength & testing of materials

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