Strain Concentrations In Polyethylene Geomembranes Adjacent To Seams And Scratches
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Strain Concentrations In Polyethylene Geomembranes Adjacent To Seams And Scratches
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Author : Jake Andresen
language : en
Publisher:
Release Date : 2017
Strain Concentrations In Polyethylene Geomembranes Adjacent To Seams And Scratches written by Jake Andresen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Geomembranes categories.
Laboratory testing was conducted to quantify strain concentrations adjacent to seams and scratches in high density polyethylene (HDPE) geomembranes. The tensile strain profile of remnants meeting the ASTM criteria for wide-width tensile testing from samples of field seams recovered for construction quality assurance testing was evaluated using digital image correlation (DIC). Strains adjacent to scratches on laboratory prepared samples loaded in tension were also measured using DIC. The tensile strain in the zone adjacent to a seam and the tensile strain adjacent to a scratch were compared to the tensile strains calculated using theoretical strain concentration factors. The relationship between the maximum tensile strain adjacent to a seam and the global nominal strain in the sample was quantified for textured and smooth geomembranes of common thicknesses. Using statistical analysis of the data, bounds were developed for the allowable nominal tensile strain expected to induce maximum tensile strains adjacent to the seam less than or equal to the typical yield strain of HDPE geomembranes, at several confidence levels. Where nominal strain is the global or average strain applied to the sample and maximum strain is the largest tensile strain induced in the sample.The reduction in the nominal yield strain due to a scratch in a HDPE geomembrane was also quantified. The yield strain was approximately the same as predicted using theoretical strain concentration factors. The difference in the average measured maximum strains adjacent to the seams of textured and smooth HDPE geomembranes was found to be statistically insignificant. However, maximum strains adjacent to extrusion welded seams were somewhat greater than adjacent to fusion welded seams for nominal strains on the order of 3% to 4%. The results of the testing program suggest that the nominal tensile strain should be limited to 4% around dual hot wedge seams and 3% around extrusion fillet seams to avoid maximum strains equal to 11%, a typical yield strain for HDPE geomembranes.
The Effects Of Seaming On The Durability Of Adjacent Polyethylene Geomembranes
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Author : DS. Carlson
language : en
Publisher:
Release Date : 1990
The Effects Of Seaming On The Durability Of Adjacent Polyethylene Geomembranes written by DS. Carlson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Brittle failures categories.
Several stress cracking failures in the liners of fluid waste impoundments have been observed in and adjacent to all types of seams in polyethylene geomembranes. The majority of these cracks occur at the outer edge of extruded fillet and lap seams and the inside edge of hot wedge seams. Stress cracking is the predominant mechanism that presently compromises the long-term durability of polyethylene geomembrane and that, in cold weather, may initiate spectacular, rapid crack propagation failures. Each type of polyethylene resin has its own fundamental stress cracking characteristics, which can be modified by the time/temperature history during manufacture of the geomembrane and, subsequently, during seaming. This paper reports the results of a preliminary series of constant tensile load tests using single edge notched specimens to determine the effects on stress crack growth rates of different types of seams in different polyethylene geomembranes. The influence of microstructure on stress cracking is also assessed.
Proceedings Of The Fifth International Conference On Geotextiles Geomembranes And Related Products
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Author :
language : en
Publisher:
Release Date : 1994
Proceedings Of The Fifth International Conference On Geotextiles Geomembranes And Related Products written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Geomembranes categories.
Designing With Geosynthetics
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Author : Robert M. Koerner
language : en
Publisher:
Release Date : 1990
Designing With Geosynthetics written by Robert M. Koerner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Technology & Engineering categories.
Geosynthetic materials have entered the mainstream in the professional arena and are no longer considered new construction material. Professionals need to keep up with the nuances of how geosynthetics work. Emphasizes design by function; overviews all types of geosynthetics, with stand-alone units on particular materials. Uses S.I. units for all problems and examples. Expands coverage of containers and tubes in the geotextile chapter. Discusses walls and slope design, including seismic analysis, in the geogrid chapter. Treats wet landfills, agricultural waste, waste stability, and dam waterproofing in the geomembrane chapter. Discusses new products and related performances in the geosynthetic clay liner chapter. Discusses new products and related behavior, including fiber reinforcement and wall drainage, in the geocomposite chapter. Adds a completely new chapter on geofoam. A useful reference for transportation, geotechnical, environmental, and hydraulics professionals and engineers.
Hdpe Geomembranes In Geotechnics
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Author : Werner W. Müller
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-11-24
Hdpe Geomembranes In Geotechnics written by Werner W. Müller and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-11-24 with Technology & Engineering categories.
High-density Polyethylene (HDPE) geomembranes are widely used for liners and sealings in geotechnical engineering. Common applications include lining of ponds, dams and dykes, landfill underliners and cover systems, remediation of contaminated sites, waterproofing for tunnels, and beneath highways. This handbook covers all aspects of the field: basic materials, geomembrane manufacture, textured geomembranes, long-term performance and testing, installation and welding of geomembranes, quality assurance and control, leak detection, standards, recommendations and regulations.
Building Design And Construction Handbook
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Author : Frederick S. Merritt
language : en
Publisher: McGraw-Hill Companies
Release Date : 1982
Building Design And Construction Handbook written by Frederick S. Merritt and has been published by McGraw-Hill Companies this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Technology & Engineering categories.
Provides updated, comprehensive, and practical information and guidelines on aspects of building design and construction, including materials, methods, structural types, components, and costs, and management techniques.
Handbook Of Geotechnical Investigation And Design Tables
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Author : Burt G. Look
language : en
Publisher: CRC Press
Release Date : 2007-04-26
Handbook Of Geotechnical Investigation And Design Tables written by Burt G. Look and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-04-26 with Science categories.
This practical handbook of properties for soils and rock contains, in a concise tabular format, the key issues relevant to geotechnical investigations, assessments and designs in common practice. In addition, there are brief notes on the application of the tables. These data tables are compiled for experienced geotechnical professionals who require a reference document to access key information. There is an extensive database of correlations for different applications. The book should provide a useful bridge between soil and rock mechanics theory and its application to practical engineering solutions. The initial chapters deal with the planning of the geotechnical investigation, the classification of the soil and rock properties and some of the more used testing is then covered. Later chapters show the reliability and correlations that are used to convert that data in the interpretative and assessment phase of the project. The final chapters apply some of these concepts to geotechnical design. This book is intended primarily for practicing geotechnical engineers working in investigation, assessment and design, but should provide a useful supplement for postgraduate courses.
Waste Containment Facilities
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Author : David Edwin Daniel
language : en
Publisher: Amer Society of Civil Engineers
Release Date : 2007
Waste Containment Facilities written by David Edwin Daniel and has been published by Amer Society of Civil Engineers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Technology & Engineering categories.
Daniel and Koerner provide technical guidance for ensuring construction quality control and assurance of geosynthetics used to contain waste.
Embankment Dams
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Author : United States. Bureau of Reclamation
language : en
Publisher:
Release Date : 1991
Embankment Dams written by United States. Bureau of Reclamation and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Dams categories.
Lining Of Waste Impoundment And Disposal Facilities
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Author :
language : en
Publisher:
Release Date : 1980
Lining Of Waste Impoundment And Disposal Facilities written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Sanitary landfills categories.