ASTM D4914-2008 用试验井中砂子替代法在现场对土壤和岩石的密度和单位重量测定的标准试验方法

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【英文标准名称】:StandardTestMethodsforDensityandUnitWeightofSoilandRockinPlacebytheSandReplacementMethodinaTestPit
【原文标准名称】:用试验井中砂子替代法在现场对土壤和岩石的密度和单位重量测定的标准试验方法
【标准号】:ASTMD4914-2008
【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】:D18.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:acceptancetest;degreeofcompaction;densitytests;fieldtest;in-placedensity;pittest;qualitycontrol;sandreplacementmethod;Backfill--testing;Calibratedsand;Calibration--soil/rockanalysisinstrumentation;Compactionmeasurement--soils;Con
【摘要】:Thesetestmethodsareusedtodeterminethein-placedensityofcompactedmaterialsinconstructionofearthembankments,roadfills,andstructurebackfill.Forconstructioncontrol,thesetestmethodsareoftenusedasthebasesforacceptanceofmaterialcompactedtoaspecifieddensityortoapercentageofamaximumunitweightdeterminedbyastandardlaboratorytestmethod(suchasdeterminedfromTestMethodD698orD1557),subjecttothelimitationsdiscussedin1.4.Thesetestmethodscanbeusedtodeterminethein-placedensityofnaturalsoildeposits,aggregates,soilmixtures,orothersimilarmaterial.Note18212;Notwithstandingthestatementsonprecisionandbiascontainedinthistestmethod,theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthesetestmethodsarecautionedthatcompliancewithPracticeD3740doesnotinitselfensurereliableresults.Reliabletestingdependsonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thesetestmethodscoverthedeterminationofthein-placedensityandunitweightofsoilandrockusingapouringdeviceandcalibratedsandtodeterminethevolumeofatestpit.Thewordx201C;rock''''inthesetestmethodsisusedtoimplythatthematerialbeingtestedwilltypicallycontainparticleslargerthan3in.(75mm).1.2Thesetestmethodsarebestsuitedfortestpitswithavolumefrom0.03to0.17m3(1to6ft3).Ingeneral,thematerialstestedwouldhaveamaximumparticlesizeof75to125mm(3to5in.).1.2.1Thesetestmethodsmaybeusedforlargersizedexcavationsifdesirable.However,forlargersizedexcavations,TestMethodD5030ispreferred.1.2.2TestMethodD1556orD2167areusuallyusedtodeterminethevolumeoftestholessmallerthan0.03m3(1ft3).Whiletheequipmentillustratedinthesetestmethodsisusedforvolumeslessthan0.03m3(1ft3),thetestmethodsallowlargerversionsoftheequipmenttobeusedwhennecessary.1.3Twotestmethodsareprovidedasfollows:1.3.1TestMethodA8212;In-PlaceDensityandUnitWeightofTotalMaterial(Section9).1.3.2TestMethodB8212;In-PlaceDensityandUnitWeightofControlFraction(Section10).1.4SelectionofTestMethods:1.4.1TestMethodAisusedwhenthein-placeunitweightoftotalmaterialistobedetermined.TestMethodAcanalsobeusedtodeterminepercentcompactionorpercentrelativedensitywhenthemaximumparticlesizepresentinthein-placematerialbeingtesteddoesnotexceedthemaximumparticlesizeallowedinthelaboratorycompactiontest(refertoTestMethodsD698,D1557,D4253,andD4254).ForTestMethodsD698andD1557only,theunitweightdeterminedinthelaboratorycompactiontestmaybecorrectedforlargerparticlesizesinaccordancewith,andsubjecttothelimitationsofPracticeD4718.1.4.2Te......
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:13P.;A4
【正文语种】:英语