Thermal conductivity of geosynthetic clay liners

Ali, Mohammad Asgar, Bouazza, Abdelmalek, Singh, Rao Martand, Gates, Will P. and Rowe, R. Kerry 2016, Thermal conductivity of geosynthetic clay liners, Canadian geotechnical journal, vol. 53, no. 9, pp. 1510-1521, doi: 10.1139/cgj-2015-0585.

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Title Thermal conductivity of geosynthetic clay liners
Author(s) Ali, Mohammad Asgar
Bouazza, Abdelmalek
Singh, Rao Martand
Gates, Will P.ORCID iD for Gates, Will P.
Rowe, R. Kerry
Journal name Canadian geotechnical journal
Volume number 53
Issue number 9
Start page 1510
End page 1521
Total pages 12
Publisher NRC Research Press
Place of publication Ottawa, Ont.
Publication date 2016-09
ISSN 0008-3674
Summary The thermal conductivities of powdered and granular bentonite based needle punched geosynthetic clay liners (GCLs) were investigated at different gravimetric water contents under 25, 50, 75, and 100 kPa vertical stresses. Both types of GCLs exhibited an increase in thermal conductivity with increasing vertical stress at all water contents. The effect of vertical stresses was more pronounced for the specimens hydrated at lower gravimetric water contents and this was attributed to their high initial volumetric air content. The variability of water distribution in partially hydrated GCLs has been identified as a factor that may affect their thermal conductivity. The forms of bentonites (i.e., powder or granular) affected their thermal conductivities; however, this effect was less apparent at higher gravimetric water contents due to the reduced air content and gel formation in the bentonites. Finally, the GCL thermal conductivity calculated from the measured thermal conductivities of its various constituents (i.e geotextile and bentonite) components differed from the measured values. This was attributed to the nonuniform water distribution across the GCL specimen and change in material properties when components of GCL were disassembled.
Language eng
DOI 10.1139/cgj-2015-0585
Field of Research 0905 Civil Engineering
0907 Environmental Engineering
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2016, Canadian Science Publishing.
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