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MEMBEREMPLOYEEPROFILEDRJASONNAIRNJasonNairnhasrecentlyjoinedBoralCementasNationalTechnicalManager.Thisisakeyseniormanagementpositioninthecompanywhichsuppliescementitiousmaterialgroundgranulatedblastfurnaceslagyashlimelimestoneandawiderangeofconstructionmaterials.Jasonisresponsibleforadvisingonrelevantproductandprocesstechnologiesproductdevelopmentandliaisonwithindustryandmajorcustomers.WhatdoyouseeasthekeybeneftsthatcanbeobtainedbyusingGroundGranulatedBlastFurnaceSlagGGBFSasaSupplementaryCementitiousMaterialSCMinthemanuactureoconcreteIhavehadover25yearsofcontinuousinvolvementinthemanufactureoruseofslagsincegraduatingfromUniversity.AftercompletingmyundergraduatedegreeinMetallurgyatTheUniversityofQueenslandUQIhadtheopportunitytoworkwithMountIsaMinesMIMfrom1988to1991onoptimisingtheoperationofablastfurnacethroughimprovementsinthemanufactureofthesinterandresultantslag.Thiswasaco-operativeprojectbetweenSmeltingResearchMIMandPyrometallurgicalResearchUQ.Theprojectinvolvedbothon-siteexperimentalworkatMountIsaaswellasaresearchprogramatUQandwasofaninterdisciplinarynaturewithresearchbeingundertakeninmineralogyprocessmetallurgysolidicationcrystalgrowthandchemicalengineering.From1998to2003theQCLGroupofCompaniesnowpartofCementAustraliaemployedmeastheProductDevelopmentManagerwhereIwasresponsibleforthedevelopmentimplementationandmanagementofproductandprocessdevelopmentactivitiesthroughoutthegroup.ThisinvolvedinvestigationsintotheuseofGranulatedBlastFurnaceSlagGBFSinthemanufactureofGGBFSasanSCMforconcreteincludingworkwithAustralianSteelMillServicesASMSaimedatinvestigatingandimprovingthegranulationprocessandtheresultantgranulate.From2003to2007IwasemployedbySunstateCementLtdatacementmillingfacilityatFishermanIslandsWynnumastheProductionandTechnicalManagerresponsiblefortheProductionandLaboratoryDepartments.TheuseofGBFSwaskeytotheproductionofarangeofblendedcementsdevelopedforthemarketwithitsinclusioninGeneralBlendforgeneralconstructionLowHeatformassconcreteRoadBlendforstabilisationandSpecialPurposefordurableconcrete.From2012IworkedwithAECOMPtyLtdasaTechnicalDirectorintheroleofTeamLeaderfortheAdvancedMaterialsGroupinQueensland.Akeypartofthisrolewassupplyingconcretetechnicaladviceonrawmaterialsmixdesignsdurabilityplanningandconstructionmanagement.TheuseofGGBFSaspartofthecementitiousblendwascommonlyspeciedtoensurethatinfrastructuredesignedorconstructedmettherequireddurabilityrequirements.DuringmytimeatSunstateCementLtdIwasinvolvedwiththeASAandlookforwardtorejoiningthisinuentialindustrybodyandthesubsequentdiscussionsthatwillfollow.WhathasbeenyourinvolvementintheconstructionmaterialsindustryandexperiencewithslagTheuseofGroundGranulatedBlastFurnaceSlagGGBFSincementblendsprovidessignicantperformanceanddurabilityimprovementstoawiderangeofconcretematerialswhilealsoprovidingenvironmentalandeconomicbenets.ForexampletheGGFBSprovidescementblendswithalowerheatofhydrationwhichcanbeusedtoreducetheriskoflongtermdegradationfromDelayedEttringiteFormationDEFandcrackingbyreducingthepeakanddifferentialtemperaturesoccurringinearlyagecuringofmassconcrete.ConcreteformarineapplicationscontainingGGBFSalsohaveincreasedresistancetochlorideingressprovidingeffectiveandcostefcientlongtermprotectiontounderlyingreinforcement.www.asa-inc.org.au02connectionsNovember14