Results 141 to 150 of about 1,485 (167)
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Equipment pressure applied to geomembrane in composite liner system
Geosynthetics International, 2012ABSTRACT: This technical paper presents the results of a test pad at an operating municipal solid waste landfill that measured pressures applied to the primary geomembrane in the double composite liner system used at the site. The pressures were measured with two pressure cells placed on top of the geomembrane and covered with varying thicknesses of ...
T.D. Stark +3 more
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Aging of HDPE Geomembrane in Three Composite Landfill Liner Configurations
Journal of Geotechnical and Geoenvironmental Engineering, 2008Laboratory-accelerated aging experiments conducted to examine the depletion of antioxidant from a geomembrane (GM) underlain by a geosynthetic clay liner (GCL) are described. Three different “protection” layers between the GM and overlying gravel and leachate are examined: (1) A traditional nonwoven geotextile (GT); (2) a GT-GCL; and (3) a GT-sand-GT ...
R. Kerry Rowe, S. Rimal
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Rate of leakage through a composite liner due to geomembrane defects
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1992Abstract This paper presents the development of a method to evaluate the rate of leakage through geomembrane defects and, in particular, defective seams, in cases where the geomembrane is placed on a layer of low-permeability soil to form a composite liner. The method is valid for a wide range of liquid heads on top of the composite liner. The method
J.P. Giroud +2 more
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Design and placement considerations for clay and composite clay/geomembrane landfill final covers
Geotextiles and Geomembranes, 1991Abstract The performance of clay and clay geosynthetic combinations for landfill barrier layers has not always proved predictable and the integration of geosynthetic materials into conventional landfill designs presents some interesting problems which were previously unforeseen.
Peter J. Carey, Mark A. Swyka
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Leachate chemical composition effects on OIT depletion in an HDPE geomembrane
Geosynthetics International, 2008Results of series of tests examining the effect of different chemical constituents found in municipal solid waste leachate on the degradation of a high-density polyethylene (HDPE) geomembrane are reported. Geomembrane samples were incubated in four synthetic leachates consisting of different combinations of volatile fatty acids, inorganic nutrients ...
R. K. Rowe, M. Z. Islam, Y. G. Hsuan
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Gravel contacts and geomembrane strains for a GM/CCL composite liner
Geotextiles and Geomembranes, 2008A method to record the shape, size, and spacing of gravel contacts that act on a geomembrane from an overlying granular drainage layer is presented. The gravel contacts acting on a 1.5-mm thick, highdensity polyethylene geomembrane are then quantified for two poorly graded, angular gravels (GP1 and GP2 with nominal grain sizes of 50 and 25 mm) with ...
R BRACHMAN, S GUDINA
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Depletion of Antioxidants from a HDPE Geomembrane in a Composite Liner
Journal of Geotechnical and Geoenvironmental Engineering, 2008The results of two series of accelerated aging tests are reported. Both series of tests were conducted at temperatures of 85, 70, 55, and 26°C over a period of about 3 years . In the simulated liner series, the top of the geomembrane was covered with a geotextile (protection) layer that was exposed to simulated municipal solid waste (MSW) landfill ...
R. Kerry Rowe, S. Rimal
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Geotextiles and Geomembranes, 2008
An analytical model was developed to predict gas leakage rate through a GM/GCL composite liner with a circular defect in the geomembrane. The predictions of the proposed analytical model were found to be in good agreement with experimental results for specimens with moisture content higher than the so-called critical moisture content.
Bouazza, Abdelmalek +3 more
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An analytical model was developed to predict gas leakage rate through a GM/GCL composite liner with a circular defect in the geomembrane. The predictions of the proposed analytical model were found to be in good agreement with experimental results for specimens with moisture content higher than the so-called critical moisture content.
Bouazza, Abdelmalek +3 more
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An analytical solution to contaminant transport through composite liners with geomembrane defects
Science China Technological Sciences, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xie, Haijian +2 more
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Modeling contaminant transport through composite liner with a hole in the geomembrane
Canadian Geotechnical Journal, 2012Contaminant transport through a single hole in a geomembrane (GM) that forms part of composite liner with a geosynthetic clay liner (GCL) for applied heads (0.3 and 1 m) and an applied pressure of about 100 kPa is modeled and compared with experimental results. The system was first permeated with distilled water until a steady state was reached.
R. Kerry Rowe, Khaled Abdelatty
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