| Accelerated carbonation and leaching behavior of the slag from iron and steel making industry |
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| 引用本文： | D. C. Johnson,C. D. Hills. Accelerated carbonation and leaching behavior of the slag from iron and steel making industry[J]. 北京科技大学学报, 2007, 0(9) |
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| 作者姓名： | D. C. Johnson C. D. Hills |
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| 作者单位： | School of Science University of Greenwich，Chatham Maritime，Kent ME4 4TB，UK，School of Science，University of Greenwich，Chatham Maritime，Kent ME4 4TB，UK |
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| 摘 要： | 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 concrete,which contribute aluminum,calcium,iron,and silicon oxides.The suitability of the slag for a particular application depends on its reactivity,cost,availability,and its influence on the properties of the resulting concrete.For the interest of durability studying of concrete 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 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(30-77 mV).The carbonation also increased the release 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.
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Accelerated carbonation and leaching behavior of the slag from iron and steel making industry |
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| CHEN Quanyuan),D.C.Johnson),ZHU Lingyun),YUAN Menghong),C.D.Hills))School of Environmental Science and Engineering,Donghua University,Shanghai ,China)School of Science,University of Greenwich,Chatham Maritime,Kent ME TB,UK)School of Information Science and Technology,Donghua University,Shanghai ,China. Accelerated carbonation and leaching behavior of the slag from iron and steel making industry[J]. Journal of University of Science and Technology Beijing, 2007, 0(9) |
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| Authors: | CHEN Quanyuan) D.C.Johnson) ZHU Lingyun) YUAN Menghong) C.D.Hills))School of Environmental Science Engineering Donghua University Shanghai China)School of Science University of Greenwich Chatham Maritime Kent ME TB UK)School of Information Science Technology Donghua University Shanghai China |
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| Affiliation: | CHEN Quanyuan1),D.C.Johnson2),ZHU Lingyun3),YUAN Menghong1),C.D.Hills2)1)School of Environmental Science and Engineering,Donghua University,Shanghai 200051,China2)School of Science,University of Greenwich,Chatham Maritime,Kent ME4 4TB,UK3)School of Information Science and Technology,Donghua University,Shanghai 200051,China |
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| 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 concrete,which contribute aluminum,calcium,iron,and silicon oxides.The suitability of the slag for a particular application depends on its reactivity,cost,availability,and its influence on the properties of the resulting concrete.For the interest of durability studying of concrete 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 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(30-77 mV).The carbonation also increased the release 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. |
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| Keywords: | carbonation slag cement leachate durability |
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