Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Interface Shear Strength of a Bentonite-Polymer Geosynthetic Clay Liner and a Textured Geomembrane
Interface shear strength was investigated between a bentonite-polymer (B-P) geosynthetic clay liner (GCL) and a 1.5-mm textured high-density polyethylene (HDPE) geomembrane (GM). Comparative tests were conducted with a conventional GCL containing sodium bentonite. All tests were conducted to a maximum displacement of 50 mm under normal stresses of 20, 100, 250, and 400 kPa. Interfaces with the B-P GCL had lower peak shear strength than interfaces with the conventional GCL under the same normal stress. The interface strength envelope for the B-P GCL was highly non-linear with lower shear strengths occurring at 400 kPa relative to those at 250 kPa, suggesting that the mechanism controlling shear strength changes with normal stress. Extrusion of polymer hydrogel into the GCL-GM interface was identified as the likely cause for lower interface shear strength and the non-linear strength envelope for interfaces with the B-P GCL.
Interface Shear Strength of a Bentonite-Polymer Geosynthetic Clay Liner and a Textured Geomembrane
Interface shear strength was investigated between a bentonite-polymer (B-P) geosynthetic clay liner (GCL) and a 1.5-mm textured high-density polyethylene (HDPE) geomembrane (GM). Comparative tests were conducted with a conventional GCL containing sodium bentonite. All tests were conducted to a maximum displacement of 50 mm under normal stresses of 20, 100, 250, and 400 kPa. Interfaces with the B-P GCL had lower peak shear strength than interfaces with the conventional GCL under the same normal stress. The interface strength envelope for the B-P GCL was highly non-linear with lower shear strengths occurring at 400 kPa relative to those at 250 kPa, suggesting that the mechanism controlling shear strength changes with normal stress. Extrusion of polymer hydrogel into the GCL-GM interface was identified as the likely cause for lower interface shear strength and the non-linear strength envelope for interfaces with the B-P GCL.
Interface Shear Strength of a Bentonite-Polymer Geosynthetic Clay Liner and a Textured Geomembrane
Chen, Jiannan (Autor:in) / Benson, Craig H. (Autor:in) / Likos, William J. (Autor:in) / Edil, Tuncer B. (Autor:in)
Geotechnical Frontiers 2017 ; 2017 ; Orlando, Florida
Geotechnical Frontiers 2017 ; 219-226
30.03.2017
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Interface Shear Strength of a Bentonite-Polymer Geosynthetic Clay Liner and a Textured Geomembrane
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