Gas flow unified measurement system for sequential measurement of gas diffusion and gas permeability of partially hydrated geosynthetic clay liners

Rouf, Md A., Bouazza, Abdelmalek, Singh, Rao M., Gates, Will P. and Rowe, R. Kerry 2016, Gas flow unified measurement system for sequential measurement of gas diffusion and gas permeability of partially hydrated geosynthetic clay liners, Canadian geotechnical journal, vol. 53, no. 6, pp. 1000-1012, doi: 10.1139/cgj-2015-0123.

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Title Gas flow unified measurement system for sequential measurement of gas diffusion and gas permeability of partially hydrated geosynthetic clay liners
Author(s) Rouf, Md A.
Bouazza, Abdelmalek
Singh, Rao M.
Gates, Will P.ORCID iD for Gates, Will P. orcid.org/0000-0001-7388-0289
Rowe, R. Kerry
Journal name Canadian geotechnical journal
Volume number 53
Issue number 6
Start page 1000
End page 1012
Total pages 13
Publisher NRC Research Press
Place of publication Ottawa, Ont.
Publication date 2016-06
ISSN 0008-3674
1208-6010
Summary A gas flow unified measurement system (UMS-G) for sequential measurement of gas diffusion and gas permeability of geosynthetic clay liners (GCLs) under applied stress conditions (2 to 20 kPa) is described. Measurements made with the UMS-G are compared with measurements made with conventional experimental devices and are found to give similar results. The UMS-G removes the need to rely on two separate systems and increases further the reliability of the gas properties’ measurements. This study also shows that the gas diffusion and gas permeability reduce greatly with the increase of both gravimetric water content and apparent degree of saturation. The effect of applied stress on gas diffusion and gas permeability is found to be more pronounced at gravimetric water content greater than 60%. These findings suggest that at a nominal overburden stress of 20 kPa, the GCL used in the present investigation needs to be hydrated to 134% gravimetric water content (65% apparent degree of saturation) before gas diffusion and gas permeability drop to 5.5 × 10−11 m2·s−1 and 8.0 × 10−13 m·s−1, respectively, and to an even higher gravimetric water content (apparent degrees of saturation) at lower stress.
Language eng
DOI 10.1139/cgj-2015-0123
Field of Research 090501 Civil Geotechnical Engineering
0905 Civil Engineering
0907 Environmental Engineering
Socio Economic Objective 960311 Social Impacts of Climate Change and Variability
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID LP0989415
Copyright notice ©2016, NRC Research Press
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084305

Document type: Journal Article
Collection: Institute for Frontier Materials
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