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【英文标准名称】:StandardTestMethodforShrinkageFactorsofSoilsbytheWaxMethod
【原文标准名称】:用蜂蜡法对土壤收缩系数的标准试验方法
【标准号】:ASTMD4943-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:Atterberglimits;linearshrinkage;shrinkage;shrinkagelimit;Calibration--soil/rockanalysisinstrumentation;Cohesivesoils;Cracking;Earthwork;Linearshrinkage;Shrinkage--soil;Soil-moistureanalysis;Swellpotential;Wateranalysis;Waxmethod
【摘要】:Thetermshrinkagelimit,expressedasamoisturecontentinpercenttothenearestwholenumber,representstheamountofwaterrequiredjusttofillallofthevoidsofagivencohesivesoilatitsminimumvoidratioobtainedbyovendrying.Theshrinkagelimitcanbeusedtoevaluatetheshrinkagepotential,crackdevelopmentpotential,andswellpotentialofearthworkinvolvingcohesivesoils.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/andthelike.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoverstheprocedurefordeterminingtheshrinkagelimitofsoils.1.2Thedataobtainedusingthistestmethodmayalsobeusedtocalculateshrinkageratio,volumetricshrinkage,andlinearshrinkage.1.3Thistestmethodisapplicableonlyforcohesivesoils.1.4SincethistestmethodisperformedonlyonthatportionofasoilwhichpassestheNo.40(425-x03BC;m)sieve,therelativeconsistencyofthisportionofthesoiltothepropertiesofthesampleasawholemustbeconsideredwhenusingtheseprocedurestoevaluatethepropertiesofasoil.1.5TheshrinkagelimitalongwiththeliquidlimitandplasticlimitofsoilsareoftencollectivelyreferredtoastheAtterberglimitsinrecognitionoftheirformationbySwedishsoilscientist,A.Atterberg.Theselimitsdistinguishtheboundariesoftheseveralconsistencystatesofcohesivesoils.1.6AllrecordedandcalculatedvaluesshallconformtotheguideforsignificantdigitsandroundingestablishedinPracticeD6026.1.6.1Theproceduresusedtospecifyhowdataarecollected/recordedandcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheuserx2019;sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.7ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificsafetyhazards,seeSection7andNote4andNoteX1.1.
【中国标准分类号】:B11
【国际标准分类号】:13_080_20
【页数】:6P.;A4
【正文语种】:英语