D0I:10.13374/1.issnl00153.2007.09.04H .952 北京科技大学学报 第29卷 stress contours and strain contours of cell wall and cradle rack were plotted,the deform law of the aluminum re- duction cell 's structure was analyzed,and some optimal measures were proposed for structure design.Reverse calculation was carried out under different load conditions on the assumption that the aluminum reduction cell was a elasticity body,and the best loading condition was achieved,which would offer a rapid and available re- search means for further design and reconstruct of an aluminum reduction cell. KEY WORDS aluminum reduction cell:finite element:thermo mechanic field:parameter optimization Accelerated carbonation and leaching behavior of the slag from iron and steel mak ing industry CHEN Quanyuan,D.C.Johnson2),ZHU Lingyun,YUAN Menghong,C.D.Hills2) 1)School of Environmental Science and Engineering.Donghua University,Shanghai 200051.China 2)School of Science.University of Greenwich.Chatham Maritime,Kent ME4 4TB.UK 3)School of Information Science and Technology,Donghua University.Shanghai 200051.China ABSTRACT Ground granulated blast furnace slag(GGBFS)and steelmaking slag have been used as a raw ma- terial for cement production or as an aggregate to make concrete,which contribute aluminum,calcium,iron, and silicon oxides.The suitability of the slag for a particular application depends on its reactivity,cost,availabil- ity,and its influence on the properties of the resulting concrete.For the interest of durability studying of con- crete in the presence of slag,the accelerated carbonation products and leaching behavior of the slag and Portland cement(PC)were studied.The experimental results confirmed that the slag was more resistant to carbonation compared to PC.The carbonation degree of GGBFS reduced by 17.74:and the carbonation degrees of steel- making slags reduced by 9.51%-11.94.Carbonation neutralized the alkaline nature of the hydrated pastes and gave rise to the redox potential of the leachate slightly (30-77 mV).The carbonation also increased the re- lease of most of the elements presented,except for calcium,to the aqueous environment.It is concluded that blend cements(PC plus slag)have economical advantages and better durability compared to PC. KEY WORDS carbonation;slag:cement;leachate:durability Journal of University of Science and Technology Beijing,2007,14(4):1
stress contours and strain contours of cell wall and cradle rack were plottedthe deform law of the aluminum reduction cell’s structure was analyzedand some optimal measures were proposed for structure design．Reverse calculation was carried out under different load conditions on the assumption that the aluminum reduction cell was a elasticity bodyand the best loading condition was achievedwhich would offer a rapid and available research means for further design and reconstruct of an aluminum reduction cell． KEY WORDS aluminum reduction cell；finite element；thermo-mechanic field；parameter optimization Accelerated carbonation and leaching behavior of the slag from iron and steel making industry CHEN Quanyuan 1）D．C．Johnson 2）ZHU L ingyun 3）Y UA N Menghong 1）C．D．Hills 2） 1） School of Environmental Science and EngineeringDonghua UniversityShanghai200051China 2） School of ScienceUniversity of GreenwichChatham MaritimeKent ME44TBUK 3） School of Information Science and TechnologyDonghua UniversityShanghai200051China ABSTRACT Ground granulated blast furnace slag （GGBFS） and steelmaking slag have been used as a raw material for cement production or as an aggregate to make concretewhich contribute aluminumcalciumiron and silicon oxides．The suitability of the slag for a particular application depends on its reactivitycostavailabilityand its influence on the properties of the resulting concrete．For the interest of durability studying of concrete in the presence of slagthe accelerated carbonation products and leaching behavior of the slag and Portland cement （PC） were studied．The experimental results confirmed that the slag was more resistant to carbonation compared to PC．The carbonation degree of GGBFS reduced by 17∙74％；and the carbonation degrees of steelmaking slags reduced by 9∙51％－11∙94％．Carbonation neutralized the alkaline nature of the hydrated pastes and gave rise to the redox potential of the leachate slightly （30－77mV）．The carbonation also increased the release of most of the elements presentedexcept for calciumto the aqueous environment．It is concluded that blend cements （PC plus slag） have economical advantages and better durability compared to PC． KEY WORDS carbonation；slag；cement；leachate；durability 摘自 Journal of University of Science and Technology Beijing200714（4）：1 ·952· 北 京 科 技 大 学 学 报 第29卷 DOI:10．13374／j．issn1001－053x．2007．09．041