Designation:D5683/D5683M−95(Reapproved2011)´1StandardTestMethodforFlexibilityofRoofingandWaterproofingMaterialsandMembranes1ThisstandardisissuedunderthefixeddesignationD5683/D5683M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—UnitsinformationwaseditoriallyrevisedinFebruary2011.1.Scope1.1Thistestmethodmeasurestheflexibilityofroofingorwaterproofingsheetmaterialsormembranesbybendingthetestmaterialoverablockcontainingarcsofspecificradiiatastandardtemperature.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.2.ReferencedDocuments2.1ASTMStandards:2D1079TerminologyRelatingtoRoofingandWaterproofing3.Terminology3.1Fordefinitionsoftermsusedinthistestmethod,refertoTerminologyD1079.4.SummaryofTestMethod4.1Bendthefivespecimensofroofingorwaterproofingsheetmaterialsormembrane,conditionedat4.4°C[40°F],(seeNote1),overablock(seeFig.1)designedtoprovidearcsofequallengthwith6-mm[1⁄4-in.],13-mm[1⁄2-in.],19-mm[3⁄4-in.],and25-mm[1-in.]radii,andthesmallestradiusisreportedwherecrackingisnotobservedinanyspecimen.NOTE1—Othertesttemperaturesmaybeusedinadditiontothetestsrequiredat4.4°C[40°F],andrefrigeratedconditioningchambersmaybeusedinsteadofthewaterbathspecified.FollowproceduresoutlinedinSection8,ifrefrigeratedchamberisutilized;however,theplasticbagmaybeomitted.5.SignificanceandUse5.1Thistestmethodisdesignedtoaidthoseinterestedintheengineeringpropertiesofroofingandwaterproofingsheetmaterialsandmembranes.5.2Thistestmethodenablesaresearchertomeasuretherelativeflexibilityofroofingandwaterproofingsheetmaterialsandmembranesunderstandardconditionsinthelabo...
