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Description of ASTM-D6392 2012ASTM D6392 - 12Standard Test Method for Determining the Integrity of Nonreinforced Geomembrane Seams Produced Using Thermo-Fusion MethodsActive Standard ASTM D6392 | Developed by Subcommittee: D35.10 Book of Standards Volume: 04.13 ASTM D6392Significance and Use 4.1 The use of geomembranes as barrier materials to restrict liquid migration from one location to another in soil and rock has created a need for a standard test method to evaluate the quality of geomembrane seams produced by thermo-fusion methods. In the case of geomembranes, it has become evident that geomembrane seams can exhibit separation in the field under certain conditions. Although this is an index type test method used for quality assurance and quality control purposes, it is also intended to provide the quality assurance engineer with sufficient seam peel and shear data to evaluate seam quality. Recording and reporting data, such as separation that occurs during the peel test and elongation during the shear test, will allow the quality assurance engineer to take measures necessary to ensure the repair of inferior seams during facility construction, and therefore, minimize the potential for seam separation in service. 1. Scope 1.1 This test method describes destructive quality control and quality assurance tests used to determine the integrity of geomembrane seams produced by thermo-fusion methods. This test method presents the procedures used for determining the quality of nonbituminous bonded seams subjected to both peel and shear tests. These test procedures are intended for nonreinforced geomembranes only. 1.2 The types of thermal field seaming techniques used to construct geomembrane seams include the following. 1.2.1 Hot Air This technique introduces high-temperature air or gas between two geomembrane surfaces to facilitate melting. Pressure is applied to the top or bottom geomembrane, forcing together the two surfaces to form a continuous bond. 1.2.2 Hot Wedge (or Knife) This technique melts the two geomembrane surfaces to be seamed by running a hot metal wedge between them. Pressure is applied to the top or bottom geomembrane, or both, to form a continuous bond. Some seams of this kind are made with dual bond tracks separated by a nonbonded gap. These seams are sometimes referred to as dual hot wedge seams or double-track seams. 1.2.3 Extrusion This technique encompasses extruding molten resin between two geomembranes or at the edge of two overlapped geomembranes to effect a continuous bond. 1.3 The types of materials covered by this test method include the following. 1.3.1 Very Low Density Polyethylene (VLDPE). 1.3.2 Linear Low Density Polyethylene (LLDPE). 1.3.3 Very Flexible Polyethylene (VFPE). 1.3.4 Linear Medium Density Polyethylene (LMDPE). 1.3.5 High Density Polyethylene (HDPE). 1.3.6 Polyvinyl Chloride (PVC). 1.3.7 Flexible Polypropylene (fPP).
Note 1 The polyethylene identifiers presented in 1.3.1- 1.3.5 describe the types of materials typically tested using this test method. These are industry accepted trade descriptions and are not technical material
classifications based upon material density.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM Standards D638 Test Method for Tensile Properties of Plastics D4439 Terminology for Geosynthetics D5199 Test Method for Measuring the Nominal Thickness of Geosynthetics D5994 Test Method for Measuring Core Thickness of Textured Geomembranes EPA Standards EPA/600/2-88/052 Lining of Waste Containment and Other Containment Facilities; Appendix N, Locus of break codes for various types of FML seams Available from the Superintendent of Documents, US Government Printing Office, Washington, DC 20402.Keywords ICS Code ICS Number Code 91.100.50 (Binders. Sealing materials) DOI: 10.1520/D6392-12 ASTM International is a member of CrossRef. ASTM D6392The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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