镍渣在混凝土中的应用研究-单昌锋

315硅酸盐通报Vol．31No．5201210BULLETINOFTHECHINESECERAMICSOCIETYOctober2012单昌锋1，王键1，郑金福2，于岩11．3501082．3506002、。。50%C20C2532．87MPa36．54MPa。。50%。TU528A1001-1625201205-1263-06StudyonApplicationofNickelSlaginCementConcreteSHANChang-feng1WANGJian1ZHENGJin-fu2YUYan11．CollegeofMaterialsScienceandEngineeringFuzhouUniversityMinhou350108China2．ConstructionMaterialsCo．Ltd．Luoyuan350600ChinaAbstractNickelslagwasusedtoreplacecertainamountofaggregateinconcreteinthisstudy．Theinfluencesofitsdosageontheworkabilityadaptabilitytowaterreducerandthecompressivestrengthoftwotypeconcretewerediscussed．Theresultsshowsthatitisapplicablefornickelslagtoreplacecertainamountofsandinconcrete．Thedosageof50%isdeterminedtobethebestforconcreteC20aswellasC25．Thecorrespondingcompressivestrengthisupto32．87MPaand36．54MParespectivelywhichcouldmeetandevenbetterthanthedesignstrength．Theworkabilityofconcretewasgreatlyimprovedandthecompressivestrengthwasincreasedbyaddingwaterreducertoconcretemixturewhichshowsthatadaptabilityofwaterreducerandconcretewasnotaffectedbythenickelslag．Bycomprehensiveanalysisitcanbeconcludedthatnickelslagcouldbeusedinconcretetoreplacecertainamountofnaturesandandtheoptimaldosageis50%．Keywordsnickelslagconcretework[e-mail]1。126431、1-5。FeO-SiO267“”2008。Ni、Fe、Co91011、1112。。。-。、。22．1。1。XRDCuKα140mA40kV4°/min。《、》GB/T14685-2011、《》GB/T14684-2011。1Tab．1ChemicalcompositionofnickelslagCompositionFeOSiO2MgOCaOAl2O3NiOCuOCo2O3othersContent/%45．8434．388．863．372．260．230．200．034．832．2《》JGJ55-2011C20C2532．542．5∶∶∶1∶2．12∶3．77∶0．61。100mm×100mm×100mm24h3d、7d、28d《》GB/T50080-2002、《》GB/T50081-2002。0．6136%320g1206g5．0～20．0mm19．0mm195g0～60%1%ZFN30%136．5g3．2g。232．542．5。34。2Tab．2PrescriptionofconcreteAdditionamountofnickelslag/%0102030405060Sand/g679679679679679679679Nickelslag/g067．9135．8203．7271．6339．5407．43Tab．3BasicpropertiesofgravelSizefractionofgravelApparentdensity/kg·m-3Loosebulkdensity/kg·m-3Mudcontent/%Clodcontent/%Porosity/%5-20mm259313230．30．14651265432．542．5Tab．4Basicpropertiesof32．5and42．5cementCement32．542．5Waterrequirementofnormalconsistency/mL136128Specificsurfacearea/m2·kg-1356372StabilityQualifiedQualifiedInitialsettingtime/h2．72．5Finalsettingtime/h4．54．1Compressivestrength/MPa3d12．317．528d36．447．9Flexuralstrength/MPa3d3．14．328d5．86．733．11XRDFig．1XRDpatternofnickelslag5。53205kg/m32500kg/m31475kg/m31350kg/m33．63．1～3．754．0%47%。1SiO2FeO45．84%34．38%。Q=SiO2/FeO+MgO913Q＜0．5SiO2FeO2FeO·SiO2Q=0．52FeO·SiO2Q=1．0SiO2FeO·SiO2Q＞1．0SiO2SiO2。SiO20．629FeMgSiO39。5Tab．5ComparisonofbasicpropertiesofnickelslagandnaturalsandTypeApparentdensity/kg·m-3Loosebulkdensity/kg·m-3Porosity/%FinenessmodulusNickelslag3205147554．03．6Naturesand2618140346．42．31XRD。1FeMgSiO3。。。3．26。6C20C2550%60%。。1266316Tab．6WorkabilityofconcretewithdifferentdesignstrengthDesignstrengthAdditionamount/%0102030405060C20WorkabilityGoodGoodGoodGoodGoodGoodPoorC25WorkabilityGoodGoodGoodGoodGoodGoodPoorC20C2523。2C203d14．68MPa11．77MPa。。。20～50%28d。。3d。。。3d28d。。。10%、20%50%35．08MPa、34．15MPa32．87MPa32．38MPa30%40%28．44MPa29．42MPa32．38MPa。SiO2CaOH2。50%21．21MPa32．38MPa21．21MPa34．5%。。2C20Fig．2InfluenceofnickelslagdosageoncompressivestrengthofconcreteC203C25Fig．3InfluenceofnickelslagdosageoncompressivestrengthofconcreteC253C253d15．06MPa12．69MPa2．37MPaC202．91MPa。C20C253dC20C2542．5C2032．5。30～50%5126728d。C20。10%～50%32．69MPa、34．16MPa、32．7MPa、33．92MPa、36．54MPa36．55MPa。C2010%0%、20%～50%12．9%、0．03%、15．0%、15．3%11．2%。C2542．528d32．5C20C25。50%24．27MPa36．55MPa33．6%。。。C20C2550%。3．31%ZFN7。76。442．53d、7d28d528d。7Tab．7WorkabilityofconcretewithwaterreducerDesignstrengthAdditionamount/%0102030405060C25WorkabilityExcellentExcellentExcellentExcellentExcellentExcellentGeneral3467。0～50%3d2．38～10．61MPa28d4．05～9．2MPa。。。4Fig．4Compressivestrengthofconcretewithwaterreducer528dFig．5Compressivestrength28dofconcretewithandwithoutwaterreducer750～50%28d36．55MPa、32．69MPa、34．16MPa、32．7MPa、33．92MPa36．54MPa28d16．5%、20．2%、26．9%、12．4%、17．1%4．7%。。60%。50%。12683141。、、《》GB/T14684-201150%。50%C20C2532．87MPa36．54MPa250%50%3。0～50%。1．J．2009937-38．2．J．2011436-37．3．J．2006418-19．4PrakashRDSGiridharK．Investigationson．concretewithstonecrusheddustasfineaggregateJ．TheIndianConcreteJournal2004622-28．5HudsonBP．ManufaettuedsandforconereteA．5thICARSymPosiumE2-2-1．AustinTexas．1997．6．--J．20113061282-1284．7．J．3061287-1289．8．J．3061362-1363．9MikhailSWebsterA．Recoveryofnickelcobaltandcopperfromindustrialslags1．ExtractionintoironsulphidematteJ．Can．Metall．Q1992314269-281．10．J．20113061381-1385．11．TMAJ．20113061415-1419．12．CaF2-J．2011301101-104．13GuptaSKTandonJKGuptaSS．InnovativesteelmakingtechnologythroughcorexprocessatjindalvijayanagarsteellimitedJ．JMinesMetFuels2003514櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒164-171．(上接第1262页)1．CVD、J．20113051197-12021207．2．Al2O3J．20102961318-1322．3．J．199716551-53．4．J．2006244484-488．5BouzeraraFHarabiAAchourSetal．PorousceramicsupportsformembranespreparedfromkaolinanddolomamixturesJ．JournaloftheEuropeanCeramicSociety20062691663-1671．6DongYCZhouJELinBetal．Reaction-sinteredp