【英文标准名称】:Roadvehicles-Functionalsafety-Part9:AutomotiveSafetyIntegrityLevel(ASIL)-orientedandsafety-orientedanalyses
【原文标准名称】:道路车辆功能安全性.第9部分:以汽车安全性完整性级别(ASIL)和安全性为主导的分析
【标准号】:ISO26262-9-2011
【标准状态】:现行
【国别】:国际
【发布日期】:2011-11
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC22
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Analysis;Automotiveengineering;Electricalequipment;Electronicengineering;Electronicsystems;Functionalefficiency;Functionalreliability;Functionality;Life(durability);Motorvehicles;Privatecars;Reliability;Roadvehicles;Safetyrequirements;Safetysystems
【摘要】:
【中国标准分类号】:T09
【国际标准分类号】:43_040_01;43_040_10
【页数】:16P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforDeterminingTheRelativeDensity(SpecificGravity)AndAbsorptionOfFineAggregatesUsingInfrared
【原文标准名称】:相对密度(比重)和用红外线对细集料吸收测定的标准试验方法
【标准号】:ASTMD7172-2006e1
【标准状态】:现行
【国别】:美国
【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】:D04.51
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:absorption;aggregate;apparentdensity;apparentrelativedensity;infrared;relativedensity;specificgravity
【摘要】:Bulkrelativedensity(specificgravity)isthecharacteristicgenerallyusedforcalculationofthevolumeoccupiedbytheaggregateinvariousmixturescontainingaggregateincludingPortlandcementconcrete,bituminousconcrete,andothermixturesthatareproportionedoranalyzedonanabsolutevolumebasis.Bulkrelativedensity(specificgravity)isusedinthecomputationofvoidsinaggregateinC1252andC29/C29M.Bulkrelativedensity(specificgravity)determinedonthesaturatedsurfacedry(SSD)basisisusediftheaggregateiswet,thatis,ifitsabsorptionhasbeensatisfied.Conversely,thebulkrelativedensity(specificgravity)determinedontheoven-drybasisisusedforcomputationswhentheaggregateisdryorassumedtobedry.Apparentrelativedensity(specificgravity)pertainstotherelativedensityofthesolidmaterialmakinguptheconstituentparticlesnotincludingtheporespacewithinthenbsp;nbsp;nbsp;particlesthatisaccessibletowater.Thisvalueisnotwidelyusedinconstructionnbsp;nbsp;nbsp;aggregatetechnology.Waterabsorptionvaluesareusedtocalculatethechangeinthemassofannbsp;nbsp;nbsp;aggregateduetowaterabsorbedintheporespaceswithintheconstituentnbsp;nbsp;nbsp;particles,comparedtothedrycondition,whenitisdeemedthattheaggregatenbsp;nbsp;nbsp;hasbeenincontactwithwaterlongenoughtosatisfymostoftheabsorptionnbsp;nbsp;nbsp;potential.Thelaboratorystandardforabsorptionisthatobtainedafternbsp;nbsp;nbsp;submergingdryaggregateforapproximately24hoursinwater.Aggregatesnbsp;nbsp;nbsp;minedfrombelowthewatertablemayhaveahigherabsorptionwhenused,ifnotallowedtodry.Conversely,someaggregateswhenusedmaycontainannbsp;nbsp;nbsp;amountofabsorbedmoisturelessthanthe24hourssoakedcondition:Foranaggregatethathasbeenincontactwithwaterandthathadfreemoistureonthenbsp;nbsp;nbsp;particlesurface,thepercentageoffreemoisturecanbedeterminedbydeductingnbsp;nbsp;nbsp;theabsorptionfromthetotalmoisturecontentdeterminedaccordingtoC566bydrying.1.1Thistestmethodcoversthedeterminationoftherelativedensity(specificgravity)andabsorptionoffineaggregates.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:4P.;A4
【正文语种】:英语