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Evaluation of Geomembrane Seaming Methods Using the Comprehensive Test System for Geomembranes
Geomembranes (GMs) are currently implemented in many landfills, retention ponds, and hazardous waste sites to prevent the migration of liquid from these facilities. Due to the size of current facilities, in situ seaming of the GMs is required. Current seam testing is primarily uni-axial. Multi-axial loads are far more representative of field stresses. The cyclic loading used in this work employs far smaller strains than current testing. Thus, the Comprehensive Test System (CTS) may be considered more reflective of field conditions. This work subjected different types of seams to evaluation using the CTS. The first objective was to determine whether hot-wedge, lap, or fillet-welded seams exhibited the greatest resistance to physical strain. Lap seams are no longer employed, but have historical significance. This work showed that the current industry-standard hot-wedge seam was the strongest, and that the industry was correct in abandoning the lap seam. However, the fillet-welding employed for fitments such as boots and sumps was not shown as strong as the hot wedge, potentially indicating an area for improvement.
Evaluation of Geomembrane Seaming Methods Using the Comprehensive Test System for Geomembranes
Geomembranes (GMs) are currently implemented in many landfills, retention ponds, and hazardous waste sites to prevent the migration of liquid from these facilities. Due to the size of current facilities, in situ seaming of the GMs is required. Current seam testing is primarily uni-axial. Multi-axial loads are far more representative of field stresses. The cyclic loading used in this work employs far smaller strains than current testing. Thus, the Comprehensive Test System (CTS) may be considered more reflective of field conditions. This work subjected different types of seams to evaluation using the CTS. The first objective was to determine whether hot-wedge, lap, or fillet-welded seams exhibited the greatest resistance to physical strain. Lap seams are no longer employed, but have historical significance. This work showed that the current industry-standard hot-wedge seam was the strongest, and that the industry was correct in abandoning the lap seam. However, the fillet-welding employed for fitments such as boots and sumps was not shown as strong as the hot wedge, potentially indicating an area for improvement.
Evaluation of Geomembrane Seaming Methods Using the Comprehensive Test System for Geomembranes
Stessel, Richard Ian (author) / Boggs, Steven C. (author)
Journal of the Air & Waste Management Association ; 48 ; 317-326
1998-04-01
10 pages
Article (Journal)
Electronic Resource
Unknown
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