作者:标准资料网 时间:2024-05-11 18:41:30   浏览:8451   来源:标准资料网

【英文标准名称】:StandardTestMethodforDeflectionswithaFalling-Weight-TypeImpulseLoadDevice
【原文标准名称】:落重型脉冲负荷装置测量弯曲性的标准试验方法
【标准号】:ASTMD4694-2009
【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】:E17.41
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:deflectionsurveys;deflectiontesting;fallingweightdeflectometer(FWD);impulsedeflectiontestingdevice;load/deflectiontesting;nondestructivetesting(NDT);pavementdeflection;pavementtesting;Transducers;Deflection--pavementsurfaces/applica
【摘要】:Thistestmethodcoversthedeterminationofpavementsurfacedeflectionsasaresultoftheapplicationofanimpulseloadtothepavementsurface.Theresultingdeflectionsaremeasuredatthecenteroftheappliedloadandatvariousdistancesawayfromtheload.Deflectionsmaybeeithercorrelateddirectlytopavementperformanceorusedtodeterminethein-situmaterialcharacteristicsofthepavementlayers.Someusesofdataincludestructuralevaluationofloadcarryingcapacityanddeterminationofoverlaythicknessrequirementsforhighwayandairfieldpavements.1.1Thistestmethodcoversthemeasurementofdeflectionsofpavedandunpavedsurfaceswithafalling-weight-typeimpulseloaddevice.ThesedevicesarecommonlyreferredtoasfallingweightdeflectometersorFWDs.1.2Thistestmethoddescribesthemeasurementofverticaldeflectionresponseofthesurfacetoanimpulseloadappliedtothepavementsurface.Verticaldeflectionsaremeasuredontheloadaxisandatpointsspacedradiallyoutwardfromtheloadaxis.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.AspecifichazardstatementisgiveninSection6.
【中国标准分类号】:P66
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】:英语