Effects of Temperature Increase in 0.5 M Solution on Hydraulic Capability of Anionic Polymer–Treated Geosynthetic Clay Liners Used as Barriers
Publication: Journal of Environmental Engineering
Volume 144, Issue 10
Abstract
Geosynthetic clay liner (GCL) is a lining material that consists of a bentonite layer sandwiched between two geotextiles. To simulate the interaction between an aqueous solution and a barrier material, triaxial permeability and free swell tests are performed on a GCL that is permeated with 0.5 M solution. The temperature of the solution is 20, 40, and 60°C, with 0.5, 1, and 2% anionic polymer by mass added to the GCL. Test results indicate that although temperature increase causes a slight increase in the swell index of the GCL, it results in a significant increase of up to 2 orders of magnitude in permittivity. The GCLs are also tested with deionized water. The increase in permittivity is attributed to a decrease in the viscosity of the permeation fluid. Adding 1% anionic polymer to the GCL results in almost 2 orders of magnitude decrease in permittivity. Anionic polymer–treated GCLs can be used effectively in aggressive solutions by both decreasing the permittivity and increasing the swell index of the GCLs.
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Acknowledgments
This study has been supported by TUBITAK (The Scientific and Technological Research Council of Turkey) under 3501-Career Development Program, Project No. 114M282, “Effects of Waste Water Temperature on the Hydraulic Performance of Polymer Treated and Untreated Geosynthetic Clay Liners.”
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Published In
Journal of Environmental Engineering
Volume 144 • Issue 10 • October 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Nov 28, 2017
Accepted: May 2, 2018
Published online: Jul 25, 2018
Published in print: Oct 1, 2018
Discussion open until: Dec 25, 2018
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