ASTM_D_8172_-_18.pdf

Designation:D817218Standard Test Method forShear and Peel Strength of Solvent-Welded Seams withNonreinforced Geomembranes1This standard is issued under the fixed designation D8172;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 quality assurance tests used to determine the integrity ofgeomembrane seams produced by adhesive and chemicalfusion methods.These test procedures are intended for nonre-inforced geomembranes only.This test method utilizes twosampling techniques;Method A is for seams produced withouta testing flap,while Method B is for seams that produce atesting flap.1.2 The rationale behind the two methods is that mostseaming processes produce some type of flap on the back sideor front side,or both,of the seam to perform peel testing.However,there are some processes in the industry that do notproduce any type of flap to perform seam peel testing,and thisis where the additional method is needed.1.3 This method is intended for use with polyvinyl chloride(PVC)-based material seams,but is not limited to PVC.1.4 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in noncon-formance with the standard.1.5 Hazardous MaterialsAlways consult the proper Ma-terial Safety Data Sheets for any hazardous materials used forproper ventilation and protection.1.6 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.1.7 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:2D76/D76M Specification for Tensile Testing Machines forTextilesD4439 Terminology for Geosynthetics3.Terminology3.1 Refer to Terminology D4439 for definitions of termsapplying to this test method.3.2 Definitions:3.2.1 adhesive,nseams are typically produced by apply-ing an adhesive to both sides of the sheet to be bonded,andthen pressure is applied to the top sheet with the bottom sheetsupported by a flat,firm surface.3.2.1.1 DiscussionHeat and pressure are commonly usedas part of the bodied chemical fusion process.3.2.2 bodied chemical agent,na chemical fluid containinga portion of the parent geomembrane polymer that dissolvesthe surface of the geomembranes to be bonded.3.2.3 bodied chemical fusion seams,nuse of a bodiedchemical agent to dissolve the surfaces of the geomembranesfor bonding.3.2.4 chemical agent,na chemical fluid that dissolves thesurface of the geomembrane to be bonded.3.2.5 chemical fusion seams,nuse of a chemical agent todissolve the surface of the geomembrane for bonding.4.Significance and Use4.1 The use of nonreinforced geomembranes as barriermaterials has created a need for a test method to evaluate thequality of chemical fusion seams produced by methods otherthan thermal fusion.This test method is used for quality control1This 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 March 2018.Originallyapproved in 2018.DOI:10.1520/D8172-18.2For 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(TBT)Committee.1 purposes and is intended to provide quality control and qualityassurance personnel with a method to evaluate seam quality.4.2 This test method utilizes two methods of sampling andspecimen preparation for the purpose of providing a method ofspecimen preparation when overlapping of the seam does ordoes not produce a flap suitable for testing purposes.5.Ap