ASTM D6392-23 PDF
Standard Test Method for Determining the Integrity of Nonreinforced Geomembrane Seams Produced Using Thermo-Fusion Methods
Standard Test Method for Determining the Integrity of Nonreinforced Geomembrane Seams Produced Using Thermo-Fusion Methods
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 5
- Дата публикации:
- 1 ноября 2023 г.
- Издание:
- D6392
- ICS:
- 91.100.50
SIGNIFICANCE 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. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Abstract
Overview
ASTM D6392-23: Standard Test Method for Determining the Integrity of Nonreinforced Geomembrane Seams Produced Using Thermo-Fusion Methods establishes procedures for evaluating the quality and integrity of seams in nonreinforced geomembranes manufactured using thermal fusion techniques. As geomembranes play a critical role as barriers to liquid migration in containment facilities, this ASTM standard serves as an essential quality assurance and quality control tool in construction, environmental engineering, and waste management projects.
The test method focuses on destructive testing-specifically seam peel and shear tests-to assess seam strength, providing quantitative data for engineers and contractors to verify the durability and performance of geomembrane installations.
Key Topics
- Applicable Materials
- Very low-density polyethylene (VLDPE)
- Linear low-density polyethylene (LLDPE)
- Very flexible polyethylene (VFPE)
- Linear medium-density polyethylene (LMDPE)
- High-density polyethylene (HDPE)
- Polyvinyl chloride (PVC)
- Flexible polypropylene (fPP)
- Thermo-Fusion Seaming Techniques
- Hot Air (high-temperature air or gas application)
- Hot Wedge or Knife (heated metal insertion)
- Extrusion Welding (molten resin bonding)
- Test Methods
- Peel Test: Measures the resistance of a seam when subjected to a pulling force perpendicular to the seam plane.
- Shear Test: Measures the resistance of a seam under forces parallel to the seam.
- Quality Control Measures
- Assessment of seam separation and elongation to detect potential weaknesses
- Data documentation for maximum tension, elongation, rupture mode, and crosshead speed
- Index-Type Testing
- The standard is primarily intended for quality control and quality assurance, rather than performance prediction under field conditions.
Applications
ASTM D6392-23 is widely used in a variety of applications where geomembrane liners are employed as liquid or vapor barriers, most notably in:
- Landfill Liners and Caps: Verifying seam quality for effective waste isolation
- Wastewater and Water Reservoirs: Ensuring leak-proof containment of liquids
- Mining Operations: Lining tailings ponds and heap leach pads
- Environmental Protection: Secondary containment for hazardous materials
- Canal and Tunnel Linings: Preventing water seepage and soil erosion
By adhering to ASTM D6392-23, project teams minimize the risk of seam failure, which can lead to costly repairs, environmental contamination, or regulatory non-compliance. The standard helps identify inferior seams during installation, allowing for remedial action before systems are placed in service.
Related Standards
For comprehensive geomembrane project quality assurance, the following standards are commonly referenced alongside ASTM D6392-23:
- ASTM D638: Test Method for Tensile Properties of Plastics
- ASTM D4439: Terminology for Geosynthetics
- ASTM D5199: Test Method for Measuring Nominal Thickness of Geosynthetics
- ASTM D5994/D5994M: Test Method for Measuring Core Thickness of Textured Geomembranes
- EPA/600/2-88/052: Lining of Waste Containment and Other Facilities (Locus of Break Codes)
Practical Value
Implementing ASTM D6392-23 ensures:
- Reliable verification of seam strength in nonreinforced geomembrane systems
- Consistent documentation and traceability for construction QA/QC reports
- Enhanced environmental safety by reducing risks of containment breach
- Compliance with industry best practices and regulatory requirements
This standard is essential for anyone involved in the installation, design, quality assurance, or inspection of geomembrane-lined containment systems, supporting long-term project success and environmental stewardship.
Технические детали
- Технический комитет
- D35 - Geosynthetics
- SKU
- ASTM D6392-23
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