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1、ConstructionandBuildingMATERIALSConstructionandBuildingMaterials21(2007)1342–1350www.elsevier.com/locate/conbuildmatBasicpropertiesofnon-sinteringcementusingphosphogypsumandwastelimeasactivatora,*bcccK.J.Mun,W.K.Hyoung,C.W.Lee,S.Y.So,Y.S.SohaR&DCente
2、r,HanilCo.,Ltd,Iksan570-946,SouthKoreabSchoolofArchitecture,YeungnamUniversity,Gyeongsan712-749,SouthKoreacResearchCenterofIndustrialTechnology,ChonbukNationalUniversity,Jeonju561-756,SouthKoreaReceived1October2005;receivedinrevisedform11December2005
3、;accepted21December2005Availableonline28August2006AbstractThisstudyaimstomanufacturenon-sinteringcement(NSC)byaddingphosphogypsum(PG)andwastelime(WL)togranulatedblast-furnaceslag(GBFS)assulfateandalkaliactivators.Thenon-sinteringcement’sbasicphysical
4、andchemicalpropertiesarealsoinvestigatedbyevaluatingthecompressivestrength,andthehydrateofNSC.Asaresult,althoughthecompressivestrengthisfairlysimilartothatofordinaryPortlandcement(OPC)intheearlycuringage,itreachesahigherlevelinthelateragethanthatofOP
5、CduetothecontinuousreactionofslagandPG.ResultsobtainedfromanalysisofthehydratehaveshownthattheglassyfilmsofGBFSaredestroyedbytheactivationofalkaliandsulfate,ionselutedfromtheinsideofGBFSreactwithPGandproduceettringite,andcon-sequentlytheremainingcompo
6、nentinGBFSslowlyproducedC–S–H(I)gel.Here,PGisconsiderednotonlytoplaytheroleofsimpleactivator,butalsotoworkasabinderreactingwithGBFS.Ó2006ElsevierLtd.Allrightsreserved.Keywords:Granulatedblast-furnaceslag;Ettringite;Wastemanagement;Hydration;Phosphogy
7、sum1.IntroductionreleasewastegasessuchasCO2,SO3,andNOX,whichcancontributetothegreenhouseeffectandacidrain[2].SincetheUnitedNationsFrameworkConventiononHowever,theworld’scementdemandisanticipatedtoClimateChange(UNFCCC)topreventglobalwarmingincreasebyab
8、out2.5–5.8%everyyearuntilthefirsthalfwasadoptedinRiodeJaneiro,Brazilin1992,theworldofthe21stcentury.Tomeettheincreaseofcementdemandhaspreparedmethodscopewithglobalwarming,whichandsimultaneouslycomplywiththeKyotoProtocol,washighlightedasasignificantissu
