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www.asa-inc.org.auJAN1103FireResistanceofSlagBlendedCementsAlessandraMendesSpecimensimmediatelyafter800oCshowingtheeffectsofdehydrationofCaOH2After1YearOPCPasteand50SlagEditorsNoteBasedonfeedbackfromconferencedelegatesAllesandraMendespresentationwasjudgedtobethebestpresentationoftheconference.Thisisagreattributegiventhehighstandardofpaperspresentedtotheconference.1.MendesA-MonashUniversity-Fireresistanceofblendedcements-6thGlobalSlagConferenceandExhibitionSydneyAustralia2010.-e-mailalessandra.mendeseng.monash.edu.auSLAGINSIDERAprimaryroleofourAssociationistobringtogetherSlagProducersProcessorsCustomersSupplierstotheSlagIndustry.Ouractivitiescovertechnicaldevelopmentsplantoperationsandprocesseseducationandpromotion.IfyouwouldlikemoreinformationontheAssociationandhowyoucanbecomeinvolvedsimplycompletetheinformationsectionattheendofthisnewsletter.Currentmembershipisaslistedbelow.AndersonLGregoryGHanleyPHon.HeatonBHon.HinczakDrIHon.JamesWHon.JonesDEHon.ProsserSDHon.VenourMHon.AustralianSteelMillServicesPtyBISIndustialLogisticsBoralCementLtdBluescopeSteelLtdPortKemblaCementAustraliaConcritePtyLtdHiSmeltLtdHolcimPtyLtdHolcimNZLtdHarscoMetalHoldingsPtyLtdOneSteelLimitedRoadsTrafcAuthorityofNSWSCESteelstoneSteelCementLtdSteelServLtdNZSwinburneUniversityofTechnologyUniversityofNewcastleUniversityofWollongongCanadianSlagAssociationNationalSlagAssociationUSNipponSlagAssociationJapanEuropeanSlagAssociationEUAlessandraMendesreportedtotheTechnicalCommitteeofAustralasianironandsteelSlagAssociationontheearlystagesofherresearchintotheFireResistanceofConcretesmadewithslag-blendedcementsin2008.Atthe6thGlobalSlagConferenceandExhibitioninSydneyAllesandrapresentedherconclusionsonthisresearchtoahighlyappreciativeinternationalaudience.Concreteisoneofthemostusedconstructionmaterialsintheworld.Whenconcreteissubjectedtoaredeteriorationofitsmechanicalpropertiesoccursleadingtoreductionofthesafetyofthestructure.Consequentlythereresistanceofconcretehasbeenthefocusofmanyresearchessince1920.Acommonmethodologytoinvestigatethephysicalandchemicaltransformationsexperiencedbyconcretewhenexposedtoheatingistodividethestudyintotwostagesi.thestudyofthecementpasteandii.thestudyoftheconcreteasawholeinwhichthepastetheaggregatesandtheinterfacebetweenthoseareanalysed.1Thispaperreportedoninvestigationsintothephysicalandchemicaltransformationthattakeplaceinpastessubjecttoexposuretohightemperatures.ItcomparespastesmadewithOrdinaryPortlandCementOPCandpastesmadewith3550and65replacementofOPCwithGroundGranulatedBlastfurnaceSlagGGBFS.Bothshort-andlong-termbehaviourupto1yearofpastesafteraninitialexposuretohightemperatureswereinvestigated.Afterexposuretotemperaturesupto800oCthespecimensweresubjecttocompressivestrengthtesting.ThephysicalandchemicaltransformationsofthebindersoftheconcretewereanalysedbythermogravimetricanalysisTGAsiliconandaluminiumnuclearmagneticresonance29SiNMRand27AlNMRx-raydiffractionXRDinfraredspectroscopyIRandSynchrotonSiKnearedgex-rayabsorptionnestructureNEXAFSspectroscopy.1ThisworkconcludedthatpartialreplacementofOPCwithGGBFSinconcretepastessubjecttohightemperatureresultsinBenecialconsumptionofCaOH2Morepolymerizedsilicatephaseafter800CAluminatephaselesssusceptibletorehydrationandImprovementinthemechanicalpropertiesfollowingexposuretotemperaturesbeyond400C.connectionsCompanyMembersPersonalMembersRelatedAssociations-