【英文标准名称】:StandardTestMethodforMeasuringPavementMacrotexturePropertiesUsingtheCircularTrackMeter
【原文标准名称】:用环道计测量路面宏观结构性能的标准试验方法
【标准号】:ASTME2157-2009
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:pavementtexture;skidresistance;Pavementsurfaces(skidresistance);CCD(chargecoupleddevice)laser-displacementsensor;CTMeter(circulartrackmeter)
【摘要】:InthePIARCInternationalExperiment(1)itwasfoundthatthevolumetricmeantexturedepth(MTD)washighlycorrelatedtothespeedconstantoftheInternationalFrictionIndex.IthasbeenfoundthattheaverageoftheMPDvaluesfortheeightsegmentsusingtheCTMeterisextremelyhighlycorrelatedwiththeMTDandcanreplacethevolumetricmeasurementfordeterminationoftheMTD(2).TherecommendedrelationshipfortheestimateoftheMTDfromtheMPDbytheCTMeteris:WhereMTDandMPDareexpressedinmillimetres.Note18212;TheseequationsdifferfromthosegiveninPracticeE1845,whicharefortheestimatedtexturedepthsfromlinearprofiles.ComparisonoftheMPDandtheRMSforasurfaceprovidesinformationofthenatureofthetexture,thatis,whetherthetextureispositiveornegative(3).Analysisoftheindividualsegmentscanbeperformedtoexaminetheprofileparalleltothedirectionoftravel(SegmentsAandE)andperpendiculartothedirectionoftravel(SegmentsCandG).Thisinformationcouldbeparticularlyusefulinthestudyofsurfacesthathavetexturewithsignificantdirectionalcharacteristics.1.1ThistestmethodcoverstheprocedureforobtainingandanalyzingpavementmacrotextureprofilesusingtheCircularTrackMeter(CTMeter).1.2TheCTMeterconsistsofachargecoupleddevice(CCD)laserx2013;displacementsensorthatismountedonanarmthatrotatessuchthatthedisplacementsensorfollowsacirculartrackhavingadiameterof284mm.1.3TheCTMeterisdesignedtomeasurethesamecirculartrackthatismeasuredbytheDynamicFrictionTester(DFTester).1.4TheCTMetercanbeusedbothforlaboratoryinvestigationsandinthefieldonactualpavedsurfaces.1.5ThesoftwaredevelopedfortheCTMeterreportsthemeanprofiledepth(MPD)andtherootmeansquare(RMS)valuesofthemacrotextureprofiles.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P66
【国际标准分类号】:93_080_20
【页数】:5P.;A4
【正文语种】:英语