【英文标准名称】:StandardTestMethodforDeterminationofPoreVolumeandPoreVolumeDistributionofSoilandRockbyMercuryIntrusionPorosimetry
【原文标准名称】:用汞侵入孔隙率测定法测定土壤和岩石的孔隙空间和孔隙空间分布的标准试验方法
【标准号】:ASTMD4404-2010
【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】:D18.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:frequencydistribution;hydraulicconductivity;mercury;permeability;poredistribution;porevolume;poresize;porosimetry;porosity;soil;soilphysics;voids;Diameter;Mercury--soilanalysis;Mercuryintrusionporosimetry;Poredistribution;Porevol
【摘要】:Thistestmethodisintendedforuseindeterminingthevolumeandthevolumedistributionofporesinsoilandrockwithrespecttotheapparentdiameteroftheentrancesofthepores.Ingeneral,boththesizeandvolumeoftheporesaffectstheperformanceofsoilandrock.Thus,theporevolumedistributionisusefulinunderstandingsoilandrockperformanceandinidentifyingamaterialthatcanbeexpectedtoperforminaparticularmanner(1,2).Theintrusionprocesstodeterminethevolumeofaporeproceedsfromtheoutsideofaspecimentowarditscenter.Comparativelylargeinteriorporescanexistthathavesmalleroutsideopeningsastheonlymeansofaccess.Mercuryintrusionporosimetrywillincorrectlyregistertheentirevolumeofthesex201C;ink-bottlex201D;poresashavingtheapparentdiameterofthesmalleraccesspores.Inatestspecimen,exteriorspecimenporescanexistinadditiontointra-specimenpores(seeSection3fordefinitions).Theinter-fragmentporeswillvaryinsizeandvolumedependingonthesizeandshapeofthesoilorrockfragmentsandonthemannerinwhichthefragmentsarepackedtogether.Itispossiblethatsomeexteriorspecimenporescanhavethesameapparentdiameterassomeintra-specimenpores.Whenthisoccurs,thistestmethodcannotdistinguishbetweenthem.Thus,thetestmethodyieldsanintrudedporevolumedistributionthatisinpartdependentuponthepackingofmultifragmentspecimens.However,mostsoilsandrockshaveintra-fragmentporesmuchsmallerthantheinter-fragmentpores.Thissituationleadstoabi-modalporesizedistributionandthedistinctionbetweenthetwoclassesofporescanthenbemade(seeFigs.1and2).Note18212;Notwithstandingthestatementonprecisionandbiascontainedinthistestmethod:Theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgencieswhichmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliabletesting.Reliabletestingdependsonseveralfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthedeterminationoftheporevolumeandtheporevolumedistributionsofsoilandrockbythemercuryintrusionporosimetrymethod.Therangeofapparentdiametersofporesforwhichthistestmethodisapplicableisfixedbytheoperatingpressurerangeofthetestinginstrument.Thisrangeistypicallybetweenapparentporeentrancediametersofabout100x03BC;mand2.5nm(0.0025x03BC;m).Largerporesmustbemeasuredbyanothermethod.1.2Mercuryintrusionporosimetryisusefulonlyformeasuringporesopentotheoutsideofasoilorrockfragment;mercuryintrusionporosimetrywillnotgivethevolumeofanyporescompletelyenclosedbysurroundingsolids.Thistestmethodwillgiveonlythevolumeofintrudableporesthathaveanapparentdiametercorrespondingtoapressurewithinthepressurizingrangeofthetestinginstrument.1.3Mercuryintrusionmayinvolvetheapplicationofhighpressurestothespecimen.Thismayresultinatemporaryorpermanentalterationorbothintheporegeometry.Generally,soilsandrocksare......
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:7P.;A4
【正文语种】:英语