Designation:D8160−20StandardTestMethodforUn-notchedCantileverBeamImpactResistance(IzodImpact)TestingofThermoplasticPavementMarkingMaterials1ThisstandardisissuedunderthefixeddesignationD8160;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthesamplepreparationforcantileverbeamsandtestmethodologyofthermoplasticpave-mentmarkingmaterials,similartothe“IzodImpact”methodlistedinTestMethodD4812.1.1.1Somemethodscallforresultsininchpound-force(in.·lbf)asopposedtothecommonfootpound-force/inch(ft·lbf/in.)orJoule/meter(J/m)(energyabsorbedperunitofspecimenofsimilarcross-section).ThismethoddoesnotpurporttocoveralltheissuesinvolvedwiththependulumimpactofcantileverbeamsandsuggeststhatTestMethodD4812andTestMethodsD256bereviewedbeforethismethodologyisattempted.1.1.2Thermoplasticpavementmarkingmaterialsareahighlyfilledpolymermatrix.Dependingontheformulatheresultingmatrixmaybebrittle,thereforepossiblyresultingininconsistenttestresults.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D256TestMethodsforDeterminingtheIzodPendulumImpactResistanceo...
