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http://dx.doi.org/10.7843/kgs.2011.27.12.005

Hydraulic Conductivity and Strength Characteristics of Self Recovering Sustainable Liner (SRSL) as a Landfill Final Cover  

Kwon, Oh-Jung (Port and Marine Marketing Team, SAMSUNG C&T)
Lee, Ju-Hyung (Geotechnical Engineering Research Division, KICT)
Cho, Wan-Jei (Department of Civil and Environmental Engineering, Dankook University)
Jung, Young-Hoon (Department of Civil and Environmental Engineering, Kyunghee University)
Publication Information
Journal of the Korean Geotechnical Society / v.27, no.12, 2011 , pp. 5-15 More about this Journal
Abstract
Conventional designs of landfill covers use geosynthetics such as geomembrane and GCL, and clay liners to lower the permeability of final covers of landfill sites. However, differential settlement and the variation of temperature or humidity in landfill sites cause the development of cracks or structural damage inside the final cover. This study examined the application of a Self Recovering Sustainable Liner (SRSL) as an alternative landfill final cover material. SRSL consists of double layers, which have chemicals, can generate precipitates filling the pores of the layers by chemical reaction. The interface material forms an impermeable layer and in case of internal cracks, the reactants of the two layers migrate towards the crack and heal it by forming another liner. In this study the applicability of SRSL material for landfill final cover was examined by performing flexible wall permeameter tests to prove that the hydraulic conductivity is lower than the regulations and unconfined compression tests to judge whether the strength satisfies the restriction for the landfill final cover. Furthermore, the environmental impacts on the permeability and strength were evaluated. The experimental results show that the SRSL has lower hydraulic conductivity and higher strength than the regulations and is little influenced by climatic changes such as wet/dry or freeze/thaw process.
Keywords
Compression strength; Hydraulic conductivity; Landfill final cover; SRSL material;
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