Relevance of capillarity to thermal and electrical conductivity in unsaturated granular soils

Heui Jean Yang, Tae Sup Yun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Capillarity critically determines the air-entry value, which in turn influences the pressure-dependent water retention capacity in unsaturated soils. Current engineering practice, however, mostly focuses on wettable soils although nonwettable soils often exist due to casual and natural events. This study presents the experimental investigations of soil-water characteristic curves (SWCC) for both hydrophilic (wettable) and hydrophobic (nonwettable) soils in conjunction with the measurement of thermal and electrical conductivity. Natural sands are artificially treated to impose the nonwettability using organo-silane. The surface wettability effect on conduction phenomena and matric suction is emphasized. Results show a nominal difference in air-entry pressure for hydrophilic and hydrophobic sands and the conductivity values are quite close to each other. This may be attributed to the relative particle void size in sands.

Original languageEnglish
Title of host publicationGeo-Congress 2014 Technical Papers
Subtitle of host publicationGeo-Characterization and Modeling for Sustainability - Proceedings of the 2014 Congress
PublisherAmerican Society of Civil Engineers (ASCE)
Pages2777-2784
Number of pages8
Edition234 GSP
ISBN (Print)9780784413272
DOIs
Publication statusPublished - 2014 Jan 1
Event2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014 - Atlanta, GA, United States
Duration: 2014 Feb 232014 Feb 26

Publication series

NameGeotechnical Special Publication
Number234 GSP
ISSN (Print)0895-0563

Other

Other2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014
CountryUnited States
CityAtlanta, GA
Period14/2/2314/2/26

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Yang, H. J., & Yun, T. S. (2014). Relevance of capillarity to thermal and electrical conductivity in unsaturated granular soils. In Geo-Congress 2014 Technical Papers: Geo-Characterization and Modeling for Sustainability - Proceedings of the 2014 Congress (234 GSP ed., pp. 2777-2784). (Geotechnical Special Publication; No. 234 GSP). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784413272.268