BS 7430-1992 电气接地线实用规程
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【英文标准名称】:Codeofpracticeforearthing
【原文标准名称】:电气接地线实用规程
【标准号】:BS7430-1992
【标准状态】:作废
【国别】:英国
【发布日期】:1992-01-31
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:分类系统;电气安全;电车道系统;铁路电力牵引装置;高压电器;街道设施;接地;铁路用;架空线;电力设备;设计;阻抗测量;维修;电气设备;接地极;铁路设备;发电机;采掘;发电站;电气保护设备;避雷装置;电气试验
【英文主题词】:
【摘要】:
【中国标准分类号】:K12
【国际标准分类号】:13_260;250;29_240_10
【页数】:86P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodsforLiquidLimit,PlasticLimit,andPlasticityIndexofSoils
【原文标准名称】:土壤液体极限、塑性极限和塑性指数的标准试验方法
【标准号】:ASTMD4318-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D18.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:建筑;施工材料;极限尺寸;塑性指数(土壤);土壤;试验
【英文主题词】:activity;Atterberglimits;liquidlimit;plasticityindex;plasticlimit
【摘要】:Thesetestmethodsareusedasanintegralpartofseveralengineeringclassificationsystemstocharacterizethefine-grainedfractionsofsoils(seePracticesD2487andD3282)andtospecifythefine-grainedfractionofconstructionmaterials(seeSpecificationD1241).Theliquidlimit,plasticlimit,andplasticityindexofsoilsarealsousedextensively,eitherindividuallyortogether,withothersoilpropertiestocorrelatewithengineeringbehaviorsuchascompressibility,hydraulicconductivity(permeability),compactibility,shrink-swell,andshearstrength.Theliquidandplasticlimitsofasoilanditswatercontentcanbeusedtoexpressitsrelativeconsistencyorliquidityindex.Inaddition,theplasticityindexandthepercentagefinerthan2-x03BC;mparticlesizecanbeusedtodetermineitsactivitynumber.Thesemethodsaresometimesusedtoevaluatetheweatheringcharacteristicsofclay-shalematerials.Whensubjectedtorepeatedwettinganddryingcycles,theliquidlimitsofthesematerialstendtoincrease.Theamountofincreaseisconsideredtobeameasureofashale’susceptibilitytoweathering.Theliquidlimitofasoilcontainingsubstantialamountsoforganicmatterdecreasesdramaticallywhenthesoilisoven-driedbeforetesting.Comparisonoftheliquidlimitofasamplebeforeandafteroven-dryingcanthereforebeusedasaqualitativemeasureoforganicmattercontentofasoil(seePracticeD2487).Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740,generally,areconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thesetestmethodscoverthedeterminationoftheliquidlimit,plasticlimit,andtheplasticityindexofsoilsasdefinedinSectiononTerminology.1.2Twomethodsforpreparingtestspecimensareprovidedasfollows:Wetpreparationmethod,asdescribedin.Drypreparationmethod,asdescribedin.Themethodtobeusedshallbespecifiedbytherequestingauthority.Ifnomethodisspecified,usethewetpreparationmethod.1.2.1Theliquidandplasticlimitsofmanysoilsthathavebeenallowedtodrybeforetestingmaybeconsiderablydifferentfromvaluesobtainedonnon-driedsamples.Iftheliquidandplasticlimitsofsoilsareusedtocorrelateorestimatetheengineeringbehaviorofsoilsintheirnaturalmoiststate,samplesshouldnotbepermittedtodrybeforetestingunlessdataondriedsamplesarespecificallydesired.1.3Twomethodsfordeterminingtheliquidlimitareprovidedasfollows:MethodA,MultipointtestasdescribedinSections.MethodB,One-pointtestasdescribedinSections.Themethodtobeusedshallbespecifiedbytherequestingauthority.Ifnomethodisspecified,useMethodA.1.3.1Themultipointliquidlimitmethodisgenerallymoreprecisethantheone-pointmethod.Itisrecommendedthatthemultipointmethodbeusedincaseswheretestresultsmaybesubjecttodispute,orwheregreaterprecisionisrequired.1.3.2Becausetheone-pointmethodrequirestheoperatortojudgewhenthetestspecimenisapproximatelyatitsliquidlimit,itisparticularlynotrecommendedforusebyinexperiencedoperat......
【中国标准分类号】:B10
【国际标准分类号】:93_020
【页数】:16P.;A4
【正文语种】:
【英文标准名称】:Soilquality-Determinationofmercuryinaquaregiasoilextractswithcold-vapouratomicspectrometryorcold-vapouratomicfluorescencespectrometry(ISO16772:2004)
【原文标准名称】:土质.用冷蒸气原子光谱法或冷蒸气原子荧光光谱法测定水域土壤提取物中的汞
【标准号】:DINISO16772-2005
【标准状态】:现行
【国别】:德国
【发布日期】:2005-06
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析和试验;分析方法;土壤调查;质量;土壤试验;土壤组分;土壤;提取物;测定;光谱测定法;原子吸收分光光度测定法;土壤分析;含量测定;汞;原子荧光分光光度测定法;水域
【英文主题词】:
【摘要】:Thisstandardspecifiesamethodforthedeterminationofmercuryinsoilsamplesextractedwithaquaregia.
【中国标准分类号】:Z18
【国际标准分类号】:13_080_10
【页数】:12P;A4
【正文语种】:德语
