Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Engineering characteristics of geosynthetic clay liners: questions asked and answered over time
Geosynthetic clay liners (GCLs) evolved from subsurface waterproofing materials that are manufactured in small panels and typically affixed to the earthen backfill side of basement walls. A transformative event occurred when GCLs were first used in a waste containment application in the mid 1980's. Soon thereafter, intensive research was launched to investigate and document the engineering characteristics of GCLs. A number of specific questions about GCL behaviour were asked and answered, though nearly all issues will continue to benefit from further research. New questions will be posed and answers developed as new materials evolve and new applications are explored. In the late 1980s and early 1990s, the cost and practical advantages of GCLs compared to compacted clay liners quickly became evident. As a result, the use of GCLs in waste containment applications grew rapidly. Today, GCLs are widely used and are an important element not only in waste containment applications but in various other sealing and waterproofing uses, as well. The main technical and engineering issues regarding GCLs can be grouped into seven broad categories: (1) hydration of GCLs; (2) hydraulic properties of bentonite in GCLs; (3) composite action of GCLs with a geomembrane; (4) stability of GCLs on slopes; (5) the physical integrity of GCLs; (6) transport of chemicals through GCLs and the equivalency of GCLs to compacted clay liners; and (7) advances in materials and designs. This paper traces understanding of engineering characteristics over time for a few key parameters. At the close of the paper, the author looks forward regarding future uses of GCLs. He would like to see more use of bentonite sandwiched between two geomembranes, more use of a protective layer beneath GCLs to mitigate impact of any unforeseen puncture and to limit diffusive migration of chemicals, more consideration of site-specific conditions in GCL design, better management of wrinkles in geomembranes that overlie GCLs, and more considered use of GCLs for some near-surface applications.
Engineering characteristics of geosynthetic clay liners: questions asked and answered over time
Geosynthetic clay liners (GCLs) evolved from subsurface waterproofing materials that are manufactured in small panels and typically affixed to the earthen backfill side of basement walls. A transformative event occurred when GCLs were first used in a waste containment application in the mid 1980's. Soon thereafter, intensive research was launched to investigate and document the engineering characteristics of GCLs. A number of specific questions about GCL behaviour were asked and answered, though nearly all issues will continue to benefit from further research. New questions will be posed and answers developed as new materials evolve and new applications are explored. In the late 1980s and early 1990s, the cost and practical advantages of GCLs compared to compacted clay liners quickly became evident. As a result, the use of GCLs in waste containment applications grew rapidly. Today, GCLs are widely used and are an important element not only in waste containment applications but in various other sealing and waterproofing uses, as well. The main technical and engineering issues regarding GCLs can be grouped into seven broad categories: (1) hydration of GCLs; (2) hydraulic properties of bentonite in GCLs; (3) composite action of GCLs with a geomembrane; (4) stability of GCLs on slopes; (5) the physical integrity of GCLs; (6) transport of chemicals through GCLs and the equivalency of GCLs to compacted clay liners; and (7) advances in materials and designs. This paper traces understanding of engineering characteristics over time for a few key parameters. At the close of the paper, the author looks forward regarding future uses of GCLs. He would like to see more use of bentonite sandwiched between two geomembranes, more use of a protective layer beneath GCLs to mitigate impact of any unforeseen puncture and to limit diffusive migration of chemicals, more consideration of site-specific conditions in GCL design, better management of wrinkles in geomembranes that overlie GCLs, and more considered use of GCLs for some near-surface applications.
Engineering characteristics of geosynthetic clay liners: questions asked and answered over time
Daniel, David E. (Autor:in)
2013
24 Seiten, Bilder, Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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