ASTM_D_7272_-_06_2011.pdf

Designation:D727206(Reapproved 2011)Standard Test Method forDetermining the Integrity of Seams Used in JoiningGeomembranes by Pre-manufactured Taped Methods1This standard is issued under the fixed designation D7272;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 describes destructive quality controland/or quality assurance tests to determine the integrity ofseams produced using taped seaming methods.This testmethod presents the procedures used for determining thequality of taped seams subjected to both peel and shear tests.These test procedures are intended for non-reinforced andreinforced geomembranes.1.2 The types of tape seaming techniques used to constructgeomembrane seams include the following.1.2.1 Inseam TapeThis technique requires the membraneto be overlapped a minimum distance.The top sheet is foldedback and both the bottom sheet and the top sheet are primedwith an adhesive primer.The primer is allowed to flash-off.Thetape adhesive is applied to the bottom sheet so that a minimumof the tape will extend out from under the top sheet when laidover the tape.The top sheet is allowed to lay flat over the tapeand the release paper is removed by pulling it at a 45 to 90degree angle,keeping the release paper flat to the surface of thebottom sheet.The seam area is then rolled with a siliconesleeved roller.1.2.2 Cover Strip TapeThis technique requires the mem-brane to be overlapped a minimum distance.An area either sideof the seam edge is primed.The primer is allowed to flash-off.The cover strip is applied with the adhesive side down centeredover the top sheet edge while removing the release paper as itproceeds along centered over the edge of the top sheet.Thecover strip is then rolled with a silicone sleeved roller.1.3 For nondestructive test methods,see Practice D4437.1.4 This test method is applicable for seaming processesthat use tape adhesive as a seaming mechanism.1.5 Subsequent decisions as to seam acceptance criteria aremadeaccordingtothesite-specificcontractplans,specifications,and contractor quality control/contractor qualityassurance(CQC/CQA)documents.1.6 In case of a material specific test method,this testmethod shall take precedence.1.7 Hazardous MaterialsAlways consult the proper mate-rial safety data sheets for any hazardous material used for theproper ventilation and protection.The use of the oven in thesetest methods,in this practice,may accelerate fume productionfrom the test specimen.1.8 The values stated in both inch-pound and SI units are tobe regarded separately as the standard.Values in parenthesesare for information only.1.9 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D413 Test Methods for Rubber PropertyAdhesion to Flex-ible SubstrateD638 Test Method for Tensile Properties of PlasticsD653 Terminology Relating to Soil,Rock,and ContainedFluidsD882 Test Method for Tensile Properties of Thin PlasticSheetingD4437 Practice for Non-destructive Testing(NDT)for De-termining the Integrity of Seams Used in Joining FlexiblePolymeric Sheet GeomembranesD4439 Terminology for GeosyntheticsD5199 Test Method for Measuring the Nominal Thicknessof GeosyntheticsD5994 Test Method for Measuring Core Thickness of Tex-tured Geomembranes3.Terminology3.1 DefinitionsFor definitions of other geosynthetic termsused in this method,refer to Terminology D4439.For defini-tions of soil terms,refer to Terminology D653.1This 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 June 1,2011.Published July 2011.Originally approved2006.Last previous version approved 2006 as D727206.DOI:10.1520/D7272-06R11.2For 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 States1 3.2 Definitions of Terms Specific to This Standard:3.2.1 tape adhesive,nsolid strip of prefabricated or manu-factured adhesive factory laminated to a release paper used tojoin two polymer sheets.3.2.2 tape adhesive seam,nadhesive-based tape placedbetween two polymer sheet materials forming a surface bond.3.2.3 cover strip adhesive,nsolid strip of prefabricated ormanufactured adhesive factory laminated to layer of polymersheet mat