基本信息
| 标准名称： | 灌注水泥用衬套安装孔 |
| 中标分类： |
航空、航天 >>
航空器与航天器制造用设备 >>
夹具 |
| 替代情况： | HB 997-74 |
| 发布日期： | 1989-05-13 |
| 实施日期： | 1989-12-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 1页 |
适用范围
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前言
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引用标准
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所属分类： 航空 航天 航空器与航天器制造用设备 夹具
【英文标准名称】:StandardTestMethodforMeasuringtheSkidResistanceofPavementsandOtherTraffickedSurfacesUsingaContinuousReading,Fixed-SlipTechnique
【原文标准名称】:用连续读数固定防滑技术对道路和其他区域表面防滑测试的标准试验方法
【标准号】:ASTME2340-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:E17.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:brakingslipfriction;brakingslipratio;fixedslip;operationalfrictiontesting;routinefrictiontesting
【摘要】:CFMEsareusedtomeasureskidresistanceonrunways,roads,andvariousothertraffickedsurfaces.Thesetestsmaycompriseoperationaltesting,performedtoobtainanimmediateassessmentofskidresistanceincurrentconditionsorroutinetestinginstandardizedconditionswhichincludetheapplicationofapreciseamountofwaterinfrontofthetesttire.Standardtestspeedsandnominalwaterfilmthicknessesareaccordingtonationalorinternationalagencystandards,thetypeofCFME,andthetestapplication.SomeexamplesoftypicalapplicationsaregiveninAppendixX1.1.1Thistestmethodcoversthemeasurementoftheskidresistanceofapavementorothertraffickedsurfaceusingthecontinuousreading,fixed-sliptechnique.1.2Thistestmethodcoversbrakedwheelmeasurementsobtainedwithlessthan100%slip.Itdoesnotcoversideforcemeasurements.1.3Thistestmethodprovidesarecordoftheskidresistancealongthewholelengthofonetrackofthetestsurfaceandenablesaveragestobeobtainedforspecifiedtestsegments.1.4Thistestmethodisusedtomeasureskidresistanceonawidevarietyofsurfacesinawidevarietyofcircumstances.Consequently,therearemanydifferentdesignsofcontinuousreading,fixed-slipmeasuringequipment(CFME)andasmanydifferenttestproceduresgoverningtheiruse.1.5Thistestmethoddoesnotattempttodetailthesedifferentequipmentsandproceduresbutdoessetouttheessentialcommonprinciples.1.6CFMEsfunctionbycreatingandmeasuringafrictionalforcebetweenatesttireoperatingataselectedslipandthetestsurface.DifferenttypesofCFMEdonotnecessarilycreatethesamefrictionalforcebetweentheirparticulartesttireandacommontestsurfaceanddonotnecessarilyusethesamemethodtomeasurethisfrictionalforce.1.7CFMEmeasurementsareobtainedataselectedsteadytestspeed.Thisspeedmayvaryaccordingtotheapplication.1.8Thetestsurfacemaybecontaminatedorcleananddry.Ifitiscleananddry,ameasuredamountofwaterisnormallydepositedonthesurfacejustinfrontofthetestwheel.1.9Themeasuringapparatusmaybebuiltintoavehicle,builtintoatrailerthatistowedbyavehicle,orbuiltintoadevicethatismanuallypushed.1.10ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SafetyprecautionaryinformationiscontainedinSection7.
【中国标准分类号】:P66;Q20
【国际标准分类号】:93_080_20
【页数】:6P.;A4
【正文语种】: