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1、Availableonlineatwww.sciencedirect.comAppliedClayScience41(2008)181–189www.elsevier.com/locate/clayAstudyonthethermalconductivityofcompactedbentonitesAnh-MinhTang⁎,Yu-JunCui,Trung-TinhLeEcoleNationaledesPontsetChaussées,UniversitéParis-Est,CERMES-InstitutNavier,6et8,av.BlaisePascal,CitéDescartes,
2、Champs-sur-Marne,77455MarneLaValléeCEDEX2,FranceReceived20July2007;receivedinrevisedform6November2007;accepted7November2007Availableonline17November2007AbstractThermalconductivityofcompactedbentoniteisoneofthemostimportantpropertiesinthedesignofhigh-levelradioactivewasterepositorieswherethismater
3、ialisproposedforuseasabuffer.Intheworkdescribedhere,athermalprobebasedonthehotwiremethodwasusedtomeasurethethermalconductivityofcompactedbentonitespecimens.Theexperimentalresultswereanalyzedtoobservetheeffectsofvariousfactors(i.e.drydensity,watercontent,hysteresis,degreeofsaturationandvolumetricf
4、ractionofsoilconstituents)onthethermalconductivity.Alinearcorrelationwasproposedtopredictthethermalconductivityofcompactedbentonitebasedonexperimentallyobservedrelationshipbetweenthevolumetricfractionofairandthethermalconductivity.Therelevanceofthiscorrelationwasfinallyanalyzedtogetherwithotherex
5、istingmethodsusingexperimentaldataonseveralcompactedbentonites.©2007ElsevierB.V.Allrightsreserved.Keywords:Thermalconductivity;Compactedbentonite;Experimentaldata;Correlation1.Introductionthethermalconductivityofcompactedbentonitesdependsonthedrydensity,thewatercontent,andtheCompactedbentoniteiso
6、ftenconsideredasamineralogicalcomposition.Theseparameters,whicharepossiblebuffermaterialforhigh-levelradioactiveingeneraleasilymeasurable,havebeenoftenusedinwastedisposal.Itsthermalconductivityisoneoftheordertopredictthethermalconductivityofsoil(DekeypropertiesforthedesignofsuchdisposalsystemVrie
7、s,1963;Johansen,1975;Ould-Lahoucineetal.,(JNC,2000).Severalworkshavebeendonepreviously2002;amongothers).tostudythethermalconductivityofcompactedInordertoverifytherelevanceofvariouspredictionbentonites.Measureddatacanbe
