Designation:D7308−17StandardPracticeforSamplePreparationofThermoplasticPavementMarkingMaterials1ThisstandardisissuedunderthefixeddesignationD7308;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverstheproperpreparationoftestspecimensofthermoplasticpavementmarkingmaterialsob-tainedtoensuretestresultsarerepresentativeofthematerialbeingtested.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D7307PracticeforSamplingofThermoplasticTrafficMark-ingMaterials3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1thermoplasticpavementmarkingmaterial,n—ahighlyfilled100%totalsolidshighwaymarkingmaterialthatwhenheatedtoamoltenstatecanbeextrudedorsprayedontoaroadsurfaceandwhencooledformsasolid,durabledelineator.4.SummaryofPractice4.1Thethermoplasticpavementmarkingmaterialispre-paredforthetestingofvariousphysicalandchemicalproper-tiesasoutlinedinthegoverningspecificationbymeltingasampleofthetrafficmarkingmaterialtoitsapplicationtemperatureundercontinuousagitation.Dependingupontherequirementsofthegoverningspecificationthesamplecanthenbeexposedtotherequiredheatingtimeandconditionspriortothepreparationofthetestspecimensorthetestspeci...
