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【英文标准名称】:StandardTestMethodforMeasurementofRetroreflectivePavementMarkingMaterialswithCEN-PrescribedGeometryUsingaPortableRetroreflectometer
【原文标准名称】:使用便携式反射仪测量CEN规定几何形状的路面标志反射材料的标准试验方法
【标准号】:ASTME1710-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:符号;试验;涂料;作道路标记;反射材料;材料试验;路面(道路);CEN;后反射;试验方法
【英文主题词】:pavementmarkings;portableretroreflectometers;retroreflection
【摘要】:Thequalityofthestripeisdeterminedbythecoefficientofretroreflectedluminance,RL,anddependsonthematerialsused,age,andwearpattern.Theseconditionsshallbeobservedandnotedbytheuser.Underthesameconditionsofilluminationandviewing,largervaluesofRLcorrespondtohigherlevelsofvisualperformance.Retroreflectivityofpavement(road)markingsdegradewithtrafficwearandrequireperiodicmeasurementtoensurethatsufficientlinevisibilityisprovidedtodrivers.Foragivenviewingdistance,measurementsofRLmadewitharetroreflectometerhavingageometrycorrespondingtothatviewingdistanceareagoodindicatorofthevisualrankingofmaterialmeasured.AsspecifiedbyCEN,themeasurementgeometryoftheinstrumentisbasedonaviewingdistanceof30m,aheadlightmountingheightof0.65mdirectlyoverthestripe,andaneyeheightof1.2mdirectlyoverthestripe.Itshallbetheresponsibilityoftheusertoemployaninstrumenthavingthespecifiedobservationandentranceangles.1.1Thistestmethodcoversmeasurementoftheretroreflectivepropertiesofhorizontalpavementmarkingmaterialscontainingretroreflectingbeads,suchastrafficstripesandsurfacesymbols,usingaportableretroreflectometerthatcanbeplacedontheroaddelineationtomeasuretheretroreflectionataprescribedgeometry.Note1Therestrictiontobeadbasedmaterialsisforthepurposeofensuringasufficientlygradualopticalresponsefunction(frompointsofthesourceaperturetopointsofthereceiveraperture)toallowgeneroussizedinstrumentsourceandreceiverapertures.1.2Theentranceandobservationanglesoftheretroreflectometeraffectthereadings.AsspecifiedbytheEuropeanCommitteeforStandardization(CEN),theentranceandobservationanglesshallbe88.76and1.05,respectively.1.3Thistestmethodisintendedtobeusedforfieldmeasurementofpavementmarkingsbutmaybeusedtomeasuretheperformanceofmaterialsonsamplepanelsbeforeplacingthemarkingmaterialinthefield.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P66
【国际标准分类号】:93_080_20
【页数】:6P.;A4
【正文语种】: