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Significance and Use
There are a large number of geomembrane types and seaming techniques. This guide is intended to help practitioners select the appropriate seam test methods for their material.
Geomembranes are relatively impermeable planar materials sheets that are shipped either as rolls or folded panels. The panels may be seamed in a factory or in the field. This guide provides geomembrane users with the most appropriate seam evaluation techniques for the most common geomembrane materials available on the market.
Some type of geomembrane may not be listed and some seam evaluation techniques may offer a good performance with a given material although this may not be indicated on Table 1. Users that are aware of this situation are invited to contact ASTM to propose an update of this guide.
The relevance of a seaming technique within a particular engineering context is beyond the scope of this guide.
1.1 This guide is intended for use as a summary of test methods necessary to evaluate geomembrane seams. It is intended to guide geomembrane users toward the appropriate evaluation techniques to assess geomembrane seam quality.
1.2 Geomembrane seams covered by this guide are: high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), very low-density polyethylene (VLDPE), flexible polypropylene (fPP), polyvinyl chloride (PVC), ethylene propylene diene terpolymer (EPDM), prefabricated bituminous geomembranes (PBGM), Ethylene Interpolymer Alloy (EIA) and reinforced geomembranes
1.3 Although a significant effort has been made to gather all types of geomembranes and related evaluation techniques which were on the market at the date of completion of this document, some available materials and technologies may have been omitted. The information presented in this document shall thus be considered to be non exhaustive.
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D751 Test Methods for Coated Fabrics
D4437 Practice for Non-destructive Testing (NDT) for Determining the Integrity of Seams Used in Joining Flexible Polymeric Sheet Geomembranes
D4439 Terminology for Geosynthetics
D5641 Practice for Geomembrane Seam Evaluation by Vacuum Chamber
D5820 Practice for Pressurized Air Channel Evaluation of Dual Seamed Geomembranes
D6214 Test Method for Determining the Integrity of Field Seams Used in Joining Geomembranes by Chemical Fusion Methods
D6365 Practice for the Nondestructive Testing of Geomembrane Seams using the Spark Test
D6392 Test Method for Determining the Integrity of Nonreinforced Geomembrane Seams Produced Using Thermo-Fusion Methods
D6747 Guide for Selection of Techniques for Electrical Detection of Leaks in Geomembranes
D7002 Practice for Leak Location on Exposed Geomembranes Using the Water Puddle System
D7006 Practice for Ultrasonic Testing of Geomembranes
D7007 Practices for Electrical Methods for Locating Leaks in Geomembranes Covered with Water or Earth Materials
D7056 Test Method for Determining the Tensile Shear Strength of Pre-Fabricated Bituminous Geomembrane Seams
D7177 Specification for Air Channel Evaluation of Polyvinyl Chloride (PVC) Dual Track Seamed Geomembranes
D7272 Test Method for Determining the Integrity of Seams Used in Joining Geomembranes by Pre-manufactured Taped Methods
D7408 Specification for Non Reinforced PVC (Polyvinyl Chloride) Geomembrane Seams
ICS Number Code 59.080.70 (Geotextiles)
UNSPSC Code 30121701(Geomesh)
ASTM D7700-12, Standard Guide for Selecting Test Methods for Geomembrane Seams, ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top