【英文标准名称】:StandardPracticeforCalculatingPavementMacrotextureMeanProfileDepth
【原文标准名称】:铺地织物中间纵面深度计算的标准实施规程
【标准号】:ASTME1845-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:E17.23
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:macrotextureprofile;meanprofiledepth;meantexturedepth;Macrotexturedepth/profile;Meanprofiledepth(MPD);Meantexturedepth(MTD);Pavementmacrotexture;Pavementsurfaces;Profiles--pavementsurfaces
【摘要】:Thispracticeissuitableforthecalculationoftheaveragemacrotexturedepthfromprofiledata.Theresultsofthiscalculation(MPD)haveproventobeusefulinthepredictionofthespeeddependenceofwetpavementfriction.TheMPDcanbeusedtoestimatetheresultofameasurementofmacrotexturedepthusingavolumetrictechniqueaccordingtoTestMethodE965.ThevaluesofMPDandMTDdifferduetothefinitesizeoftheglassspheresusedinthevolumetrictechniqueandbecausetheMPDisderivedfromatwo-dimensionalprofileratherthanathree-dimensionalsurface.Thereforeatransformationequationmustbeused.Thispracticemaybeusedwithpavementmacrotextureprofilestakenonactualroadsurfacesorfromcoresorlaboratorypreparedsamples.Aggregatesize,shape,anddistributionarefeatureswhicharenotaddressedinthispractice.Thispracticeisnotmeanttoprovideacompleteassessmentoftexturecharacteristics.Inparticular,careshouldbeusedwheninterpretingtheresultforporousorgroovedsurfaces.Thispracticedoesnotaddresstheproblemsassociatedwithobtainingameasuredprofile.Laserorotheropticalnoncontactmethodsofmeasuringprofilesareusuallypreferred.However,contactmethodsusingastylusalsocanprovideaccurateprofilesifproperlyperformed.1.1Thispracticecoversthecalculationofmeanprofiledepthfromaprofileofpavementmacrotexture.1.2Themeanprofiledepthhasbeenshowntobeusefulinpredictingthespeedconstant(gradient)ofwetpavementfriction.1.3AlineartransformationofthemeanprofiledepthcanprovideanestimateofthemeantexturedepthmeasuredaccordingtoTestMethodE965.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W56
【国际标准分类号】:17_040_20
【页数】:4P.;A4
【正文语种】:英语