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ASTM D6392-12
Standard Test Method for Determining the Integrity of Nonreinforced Geomembrane Seams Produced Using Thermo-Fusion Methods
STANDARD published on 1.7.2012
The information about the standard:
Designation standards: ASTM D6392-12
Note: WITHDRAWN
Publication date standards: 1.7.2012
SKU: NS-34953
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM D6392-12 :
Keywords:
ICS Number Code 91.100.50 (Binders. Sealing materials)
Additional information
| Significance and Use | ||||||||||
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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. |
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| 1. Scope | ||||||||||
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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). 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.
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| 2. Referenced Documents | ||||||||||
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