【英文标准名称】:StandardTestMethodforRetroreflectanceofHorizontalCoatings
【原文标准名称】:平面涂层回复反射的标准试验方法
【标准号】:ASTMD4061-1994(2006)
【标准状态】:现行
【国别】:
【发布日期】:1994
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E12.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:覆层;涂漆;涂料;试验;反射
【英文主题词】:
【摘要】:Thequantitycoefficientofretroreflectedluminanceisameasureofthereflectedluminanceinthedirectionoftheobserver.Thisisthelightreturnedbytheretroreflectivesurfacetotheobserverfromthesource,whichinpracticeisthevehicleheadlamp.Thistestmethodmaybeusedasameasureofthenighttimeperformanceofhorizontallyappliedsurfacingmaterialsusedonhighwaysurfacesforlanemarkingsandothertrafficcontrolpurposes.Sincethistestmethodisalaboratoryprocedure,testspecimensmustbepreparedsothattheycanbemountedonthespecimenholder.Specimensmeasuredbythislaboratorymethodmaybeusedastransferstandardsforthecalibrationofportableinstrumentation.Specimenselectionandpreparationmaysignificantlyinfluencetheresultsofthistestmethod.1.1Thistestmethoddescribestheinstrumentalmeasurementoftheretroreflectivepropertiesofhorizontalsurfacingmaterials,suchastrafficstripepaintsystems,traffictapes,andtrafficsurfacesymbols.1.2Specimenpreparation,size,andshapemustbedeterminedandspecifiedbytheuserofthistestmethod.Likewise,theusermustspecifytheobservationandentranceanglestobeused(see).1.3Thegeometricrequirementsofthistestmethodarebasedonmaterialsforwhichtherelativeretroreflectancechangeslessthanapproximately50%overtheobservationanglerangefrom0.2to0.5.Thisisillustratedin.1.4Thistestmethodisalaboratorytestandrequiresafacilitythatcanbedarkenedsufficientlysothatstraylightdoesnotaffectthetestresults.Thisfacilitymustbecapableofhousingtherequired15-mtestdistance.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G50
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】: