【英文标准名称】:StandardTestMethodforSpecificGravityofSoilSolidsbyGasPycnometer
【原文标准名称】:用气体比重瓶法测定土壤固体粒子比重的标准试验方法
【标准号】:ASTMD5550-2006
【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】:D18.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:底部;土壤
【英文主题词】:desiccant;Drierite;salinity;soil;specificgravity;watercontent
【摘要】:Thespecificgravityvalueisusedinmanyphaserelationequationstodeterminerelativevolumesofparticle,water,andgasmixtures.Thetermsoilparticletypicallyreferstoanaturallyoccurringmineralgrainthatisnotreadilysolubleinwater.Therefore,thespecificgravityofsoilsthatcontainextraneousmatter(suchascement,lime,andthelike)orwater-solublematerial(suchassalt)mustbecorrectedfortheprecipitatethatformsonthespecimenafterdrying.Iftheprecipitatehasaspecificgravitylessthantheparentsoilgrains,theuncorrectedtestresultwillbetoolow.Iftheprecipitatehasahigherspecificgravity,thentheuncorrectedtestvaluewillbetoohigh.Note28212;Notwithstandingthestatementsonprecisionandbiascontainedinthistestmethod:Theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgencieswhichmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetenttesting.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotensurereliabletesting.Reliabletestingdependsonseveralfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthedeterminationofthespecificgravityofsoilsolidsbymeansofagaspycnometer.Particlesizeislimitedbythedimensionsofthespecimencontaineroftheparticularpycnometerbeingused.1.2TestMethodD854maybeusedinsteadoforinconjunctionwiththistestmethodforperformingspecificgravitytestsonsoils.NotethatTestMethodD854doesnotrequirethespecializedtestapparatusneededbythistestmethod.However,TestMethodD854maynotbeusedifthespecimencontainsmatterthatcanreadilydissolveinwater,whereasthistestmethoddoesnothavethatlimitation.1.3AllmeasuredandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.3.1Forpurposesofcomparing,ameasuredorcalculatedvalue(s)withspecifieslimits,themeasuredorcalculatedvalue(s)shallberoundedtothenearestdecimalorsignificantdigitsinthespecifiedlimits.1.3.2Theproceduresusedtospecifyhowdataarecollected/recordedandcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheusersobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.4ThevaluesstatedinacceptableSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:B11
【国际标准分类号】:13_080_10
【页数】:5P.;A4
【正文语种】: