ASTM_D_7056_-_07_2018.pdf

Designation:D705607(Reapproved 2018)Standard Test Method forDetermining the Tensile Shear Strength of PrefabricatedBituminous Geomembrane Seams1This standard is issued under the fixed designation D7056;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method presents the procedures used fordetermining the quality of prefabricated bituminous geomem-brane(PBGM)bonded seams subjected to a shear test.Itdescribes a destructive quality control test used to determinethe integrity of PBGM seams.1.2 This test procedure is intended for PBGMs only.1.3 The type of thermal field seaming technique used toconstruct PBGM seams include the following.1.3.1 Torch-OnThis technique melts two PBGM surfacesto be seamed by running a flame from a propane torch betweenthem.Pressure is applied on the top or bottom,or both PBGMs,forcing together both surfaces to form a continuous bond.1.3.2 Hot AirThis technique introduces high-temperatureair or gas between two PBGM surfaces to facilitate melting.Pressure is applied on the top or bottom,or both PBGMs,forcing together both surfaces to form a continuous bond.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D638 Test Method for Tensile Properties of PlasticsD5199 Test Method for Measuring the Nominal Thicknessof GeosyntheticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 geomembrane,nan essentially impermeable geosyn-thetic composed of one or more synthetic sheets.3.1.2 geosynthetic,na planar product manufactured frombitumen or polymeric material used with soil,rock,earth,orother geotechnical engineering-related material as an integralpart of a man-made project,structure,or system.3.1.3 geotextile,nany permeable textile material used infoundation,soil,rock,earth,or any other geotechnicalengineering-related material,as an integral part of a man-madeproject,structure,or system.3.1.4 prefabricated bituminous geomembrane(PBGM),na material fabricated in a plant and consisting principally ofnonwoven polyester textile,impregnated by a blend of oxi-dized or polymer-modified bitumen incorporating filler.3.1.5 quality assurance,nall planned and systematic ac-tions necessary to provide adequate confidence that an item ora facility will perform satisfactorily in service.3.1.6 quality control,nthe operational techniques and theactivities,which sustain a quality of material,product,system,or service that will satisfy given needs;also the use of suchtechniques and activities.4.Significance and Use4.1 The use of PBGM as barrier materials to restrict liquidmigration from one location to another in soils has created aneed for a standard test method to evaluate the quality ofPBGM seams.In the case of PBGMs,it has become evidentthat seams can exhibit separation in the field under certainconditions.Although this is an index-type test method used forquality assurance and quality control purposes,it is alsointended to provide the quality assurance engineer with suffi-cient seam shear data to evaluate seam quality.Recording andreporting data will allow the quality assurance engineer to take1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.10 on Geomem-branes.Current edition approved Feb.1,2018.Published February 2018.Originallyapproved in 2004.Last previous edition approved in 2012 as D7056 07(2012).DOI:10.1520/D7056-07R18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TB