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SLAGINSIDERwww.asa-inc.org.auConcretewasakeybuildingproductforRomanengineersmorethan2000yearsago.Intheperiodsincethewholematerofwhatisconcreteandinparticularwhatconstitutescementhasbeensubjectofextensiveresearchandmuchdiscussion.WMEMagazineinitsarticleonMelbournex19sPixelbuildingstatesthatx18Concreteisthemostwidelyusedbuildingmaterialwith30billiontonesmanufacturedgloballyeachyear.x19CementakeyingredientofConcreteisPortlandcementtheproductionofwhichreleasesaboutatonneofCO2foreverytonneofproduct.Giventhescaleofthisindustryitisestimatedtoproduceuptoaround5oftotalworldgreenhouseemissions.Victoriahasinmorerecentyearsbeendrivingthepacetowardsx1cgreenbuildingsx1d.CouncilHouse2Melbourneforsometimeheldthepositionofamodelgreenstarbuilding.ThestakesarehighbotheconomicallyandenvironmentallytodevelopwaysofminimisingwasteandutilisingmaterialssuchasrecycledaggregatesGroundGranulatedSlagLyandsilicafume.InsearchingforthewaystoproducealowenergybuildingVictoriax19sMITestablishedalowcarbonhubin2009withtheobjectofdevelopingalow-carbonconcretex18speciKcallyfortheLondonOlympicsx19.Outofthiscamethedevelopmentofamaterialcalledx1cPixelcretex1dthex18brainchildofbuildingcompanyx18Grocon.x19MixdesignincludesLyashgroundgranulatedblastfurnaceslagsilicafumereclaimedaggregaterecycleddemolitionconcreteaggregateandrecycledwater.ThenetresultofthisworkisthequitestrikingPixelBuildingwithacalculatedglobalwarmingpotentiallowerthancomparativeconcretemixesandsatisfyingAustralianStandards.Furtherinformationwww.pixelbuilding.com.auMelbournex19sInnovativePixelBuildingachieves6GreenstarsBasedonanarticlebyRichardCollinsx13WasteManagementandEnvironmentMagazinex13September2011p29INSIDEMelborunex19sx10Pixelx10buildingx10x10x10x10x10x10x10x10x10x10x10x10x1004connectionsNOVEMBER11