Designation:D5683/D5683M−95(Reapproved2022)StandardTestMethodforFlexibilityofRoofingandWaterproofingMaterialsandMembranes1ThisstandardisissuedunderthefixeddesignationD5683/D5683M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodmeasurestheflexibilityofroofingorwaterproofingsheetmaterialsormembranesbybendingthetestmaterialoverablockcontainingarcsofspecificradiiatastandardtemperature.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1079TerminologyRelatingtoRoofingandWaterproofing3.Terminology3.1Fordefinitionsoftermsusedinthistestmethod,refertoTerminologyD1079.4.SummaryofTestMethod4.1Bendthefivespecimensofroofingorwaterproofingsheetmaterialsormembrane,conditionedat4.4°C[40°F](seeNote1),overablock(seeFig.1)designedtoprovidearcsofequallengthwith6mm[1⁄4in.],13mm[1⁄2in.],19mm[3⁄4in.],and25mm[1in.]radii,andthesmallestradiusisreportedwherecrackingisnotobservedinanyspecimen.NOTE1—Othertesttemperaturesmaybeusedinadditiontothetestsrequiredat4.4°C[40°F],an...
