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1、Cement&ConcreteComposites33(2011)993–1000ContentslistsavailableatSciVerseScienceDirectCement&ConcreteCompositesjournalhomepage:www.elsevier.com/locate/cemconcompPerformance-baseddesignandcarbonationofconcretewithhighflyashcontentaabab,⇑A.Younsi,P.Turcry,E.Rozière,A.Aït-Mokh
2、tar,A.LoukiliaUniversitédeLaRochelle,LEPTIAB,LaRochelle,FrancebInstitutdeRechercheenGénieCiviletMécanique(GeM),UMR-CNRS6183,EcoleCentraledeNantes,Nantes,FrancearticleinfoabstractArticlehistory:Thispaperreportsonaninvestigationofthedurabilityofhigh-volumeflyashconcreteexpose
3、dtocar-Received13July2010bonation(XCclassinEN206-1Standard).ThereductionofcementcontentisassumedtomitigateCO2Receivedinrevisedform12July2011emissionsduetotheproductionofPortlandcementclinker.ThedurabilityofconcreteisassessedAccepted14July2011throughaperformance-basedapproa
4、ch.First,aperformance-basedmethodwasappliedtodesignacon-Availableonline27August2011cretemixturewithmorethan50%substitutionofcementbyflyash.Tocopewiththehighviscosityoftheso-obtainedmixture,anair-entrainingagentwasused.Duetoitslowcementcontent,theso-obtainedKeywords:mixtured
5、oesnotcomplywiththeprescriptiverequirementsoftheEuropeanstandard(EN206-1).Thus,CO2emissionsaccordingtotheequivalentperformanceconcept,itspotentialdurabilityhastobeprovedthroughcom-GreenconcreteFlyashparisonwithreferencemixturescomplyingwithprescriptivestandardrequirements.
6、Theperformance-Carbonationbasedevaluationofthedurabilityofthedesignedmixtureandreferencemixtures(withPortlandcementPerformance-baseddesignandblendedcement)consistedinporosityandacceleratedcarbonationtests.Theinfluenceofcuringmodeandthermaltreatmentdurationbeforecarbonationt
7、estwerealsoinvestigated.Whateverthecur-ingmode,thedesignedmixturewasfoundasresistanttoacceleratedcarbonationasthereferencemix-turecontainingblendedcement.Ó2011ElsevierLtd.Allrightsreserved.1.Introductionexposureclasses[9].Forexample,themostcurrentexposureclas-ses,namely‘‘X
8、C’’classes,correspondtothereinforcedconcreteLifecycleassessmentsrevealthatcarbonemissions
