Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Damage to geomembrane liners from tire derived aggregate
Abstract Tire derived aggregate (TDA) is currently being used as a cost-effective substitute for gravel in landfill leachate collection systems. TDA is composed of tires that have been shredded into pieces. However, the particles often contain a small portion of high risk protruding wires that may puncture a geomembrane placed below the TDA. The chance that these wires puncture is a function of the number of wires present in a sample, how the particles land, and the efficiency of the protection layer to prevent punctures. Using heavier nonwoven geotextile protection layers with larger size TDA and thicker geomembranes, the number of punctures may be expected to be fewer than 20 per hectare for the materials tested in this study. A second component to long term geomembrane performance is the presence of localised zones of high strain resulting from the point loading on the geomembrane. The strain resulting from TDA was found to be less than the strain which occurred from gravel using the same protection layers. It is concluded that, for different reasons, gravel and TDA both require effective protection layers of soil or heavy nonwoven geotextile to ensure long-term performance.
Damage to geomembrane liners from tire derived aggregate
Abstract Tire derived aggregate (TDA) is currently being used as a cost-effective substitute for gravel in landfill leachate collection systems. TDA is composed of tires that have been shredded into pieces. However, the particles often contain a small portion of high risk protruding wires that may puncture a geomembrane placed below the TDA. The chance that these wires puncture is a function of the number of wires present in a sample, how the particles land, and the efficiency of the protection layer to prevent punctures. Using heavier nonwoven geotextile protection layers with larger size TDA and thicker geomembranes, the number of punctures may be expected to be fewer than 20 per hectare for the materials tested in this study. A second component to long term geomembrane performance is the presence of localised zones of high strain resulting from the point loading on the geomembrane. The strain resulting from TDA was found to be less than the strain which occurred from gravel using the same protection layers. It is concluded that, for different reasons, gravel and TDA both require effective protection layers of soil or heavy nonwoven geotextile to ensure long-term performance.
Damage to geomembrane liners from tire derived aggregate
Marcotte, B.A. (Autor:in) / Fleming, I.R. (Autor:in)
Geotextiles and Geomembranes ; 48 ; 198-209
18.11.2019
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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