ASTM D4318-2010 土壤的流限、塑限和塑性指数的标准试验方法

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【英文标准名称】:StandardTestMethodsforLiquidLimit,PlasticLimit,andPlasticityIndexofSoils
【原文标准名称】:土壤的流限、塑限和塑性指数的标准试验方法
【标准号】:ASTMD4318-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:
【英文主题词】:activity;Atterberglimits;liquidlimit;plasticityindex;plasticlimit;Atterberglimits;Liquidlimitofsoil;Plasticityindex;Plasticlimitofsoil;Soil
【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''ssusceptibilitytoweathering.Theliquidlimitofasoilcontainingsubstantialamountsoforganicmatterdecreasesdramaticallywhenthesoilisoven-driedbeforetesting.Comparisonoftheliquidlimitofasamplebeforeandafteroven-dryingcanthereforebeusedasaqualitativemeasureoforganicmattercontentofasoil(seePracticeD2487.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740,generally,areconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thesetestmethodscoverthedeterminationoftheliquidlimit,plasticlimit,andtheplasticityindexofsoilsasdefinedinSection3onTerminology.1.2Twomethodsforpreparingtestspecimensareprovidedasfollows:Wetpreparationmethod,asdescribedin10.1.Drypreparationmethod,asdescribedin10.2.Themethodtobeusedshallbespecifiedbytherequestingauthority.Ifnomethodisspecified,usethewetpreparationmethod.1.2.1Theliquidandplasticlimitsofmanysoilsthathavebeenallowedtodrybeforetestingmaybeconsiderablydifferentfromvaluesobtainedonnon-driedsamples.Iftheliquidandplasticlimitsofsoilsareusedtocorrelateorestimatetheengineeringbehaviorofsoilsintheirnaturalmoiststate,samplesshouldnotbepermittedtodrybeforetestingunlessdataondriedsamplesarespecificallydesired.1.3Twomethodsfordeterminingtheliquidlimitareprovidedasfollows:MethodA,MultipointtestasdescribedinSections11and12.MethodB,One-pointtestasd......
【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】:英语