Hydraulic Performance of Compacted Clay Liners (CCLS) Under Simulated Landfill Conditions
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Experimental investigations were carried out to evaluate the hydraulic performance of Compacted Clay Liners (CCLs) in landfills before waste placement and after waste placement. Results exhibited positive correlation between CCLs’ hydraulic conductivity and plasticity indices when CCLs exposed to daily thermal or wet-dry cycles. Overlaying the CCL with a layer of geomembrane minimized the effects of daily thermal and wet-dry cycles. After waste placement, the hydraulic conductivity for CCL specimens increased by two to three times their initial values when exposed to 55℃ for 75 days. Initial increase in hydraulic conductivities for all CCL specimens occurred when the permeant was changed from tap water to leachate. However, as the leachate exposure time increased, hydraulic conductivity readings decreased to as low as one order of magnitude after 75 days of leachate permeation at room temperature. The rate of hydraulic conductivity reduction due to leachate permeation was slower at higher temperatures.
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Copyright © 2014 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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- 2014
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