【英文标准名称】:StandardTestMethodforUnconfinedCompressiveStrengthofCohesiveSoil
【原文标准名称】:粘土无侧限抗压强度的标准试验方法
【标准号】:ASTMD2166-2006
【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】:D18.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:粘土;抗压强度;建筑;施工材料;土壤;试验
【英文主题词】:cohesivesoil;sensitivity;strain-controlledloading;strength;stress-strainrelationships;unconfinedcompression
【摘要】:Theprimarypurposeoftheunconfinedcompressiontestistoquicklyobtainameasureofcompressivestrengthforthosesoilsthatpossesssufficientcohesiontopermittestingintheunconfinedstate.Samplesofsoilshavingslickensidedorfissuredstructure,samplesofsometypesofloess,verysoftclays,dryandcrumblysoilsandvarvedmaterials,orsamplescontainingsignificantportionsofsiltorsand,orboth(allofwhichusuallyexhibitcohesiveproperties),frequentlydisplayhighershearstrengthswhentestedinaccordancewithTestMethodD2850.Also,unsaturatedsoilswillusuallyexhibitdifferentshearstrengthswhentestedinaccordancewithTestMethodD2850.Iftestsonthesamesampleinbothitsintactandremoldedstatesareperformed,thesensitivityofthematerialcanbedetermined.Thismethodofdeterminingsensitivityissuitableonlyforsoilsthatcanretainastablespecimenshapeintheremoldedstate.Note28212;Forsoilsthatwillnotretainastableshape,avanesheartestorTestMethodD2850canbeusedtodeterminesensitivity.Note38212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfensurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthedeterminationoftheunconfinedcompressivestrengthofcohesivesoilintheintact,remolded,orreconstitutedcondition,usingstrain-controlledapplicationoftheaxialload.1.2Thistestmethodprovidesanapproximatevalueofthestrengthofcohesivesoilsintermsoftotalstresses.1.3Thistestmethodisapplicableonlytocohesivematerialswhichwillnotexpelorbleedwater(waterexpelledfromthesoilduetodeformationorcompaction)duringtheloadingportionofthetestandwhichwillretainintrinsicstrengthafterremovalofconfiningpressures,suchasclaysorcementedsoils.Dryandcrumblysoils,fissuredorvarvedmaterials,silts,peats,andsandscannotbetestedwiththismethodtoobtainvalidunconfinedcompressionstrengthvalues.Note1Thedeterminationoftheunconsolidated,undrainedstrengthofcohesivesoilswithlateralconfinementiscoveredbyTestMethodD2850.1.4ThistestmethodisnotasubstituteforTestMethodD2850.1.5AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.5.1Theproceduresusedtospecifyhowdataarecollected/recordedandcalculatedinthistestmethodareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheuser''sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatocommensuratewiththeseconsiderations.Itisbeyondthescopeofthistestmethodtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesstatedininch-poundunitsareapproximate.Thisstandarddoesnotpurporttoaddressallofthesafetyproblems......
【中国标准分类号】:P20
【国际标准分类号】:93_020
【页数】:6P.;A4
【正文语种】: