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Showing 1 to 7 of 7 for “"HDPE Geomembrane"”.
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Long-Term Performance of HDPE Geomembranes as Landfill Liners
High density polyethylene (HDPE) geomembranes are normally used as part of a composite liner for waste containment facilities such as municipal solid waste (MSW) landfills and heap leach pads. Field conditions, which include physical stresses on the geomembrane, elevated operating temperatures, and …
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Comparison of shear strength properties of textured polyethylene geomembrane interfaces in landfill liner systems
The interface shear strength between geomembranes and geosynthetics is a critical factor governing the stability of slopes that incorporate geosynthetics. In order to better characterise the shear properties of geomembranes, a wide-range of shear strength friction measurements were conducted. This …
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Elevated temperatures in waste containment facilities
… temperatures to high density polyethylene (HDPE) geomembrane service life. MSW landfills with a gas collection and control system used to comply with federal regulations (40 CFR, Part 60, Subpart WWW) operate each gas extraction well with a landfill gas temperature less than 55°C (131°F) …
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Containment of Organic Contaminants Using Geosynthetics
… and xylenes (BTEX) and PCBs through geomembranes are evaluated. Diffusion of BTEX is also evaluated through vapour barriers, as well as diffusion of PCBs through a compacted clay liner (CCL) and a GCL. The permeation coefficient (Pg) for BTEX diffusion was lowest for high density …
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Coal Combustion Waste Disposal Facility Design: Electric Power Cooperative Selby, South Dakota
… of a 60 mil high density polyethylene (HDPE) geomembrane overlying a compacted soil layer were evaluated with and without a leachate collection system. Two cover systems were evaluated to predict the performance of the closed landfill. Again, the HELP model was used to determine the …
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Comparative Assessment of Single & Double Interface Shear Strength Properties: A Case Study of a Landfill Project in the Western Cape Province, South Africa
… three nonwoven geotextiles, two smooth-sided geomembranes, a synthetic cuspate drain, sand, gravelly sand (GS), and leachate collection stone (LCS). All tests were conducted at applied normal pressures of 150, 300, & 450 kPa under saturated conditions with fresh tap water at a 1mm/min shearing …
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Ageing of HDPE Geomembranes Used to Contain Landfill Leachate or Hydrocarbon Spills
The ageing of high density polyethylene geomembrane (GM) liners used to minimize advection and diffusion of contaminants in municipal solid waste landfill leachate and in hydrocarbon spills to the environment is examined. The evaluation of the ageing of GMs used in landfills involved four …