Cementitious property modification of basic oxygen furnace steel slag

In this paper, we propose a new method for modifying the chemical and mineralogical compositions of steel slag by adding industrial wastes to molten basic oxygen furnace steel slag (BOFS). The effects of the composition of the modifying component and the modification parameters on the structure and...

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Bibliographic Details
Published inConstruction & building materials Vol. 48; pp. 575 - 579
Main Authors Li, Zaibo, Zhao, Sanyin, Zhao, Xuguang, He, Tusheng
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2013
Elsevier B.V
Subjects
Analysis
Cement
Cementitious property
Coal ash
Industrial wastes
Modification
Properties
Steel slag
Utilization
China
Modification
Utilization
Cementitious property
Steel slag
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Summary:In this paper, we propose a new method for modifying the chemical and mineralogical compositions of steel slag by adding industrial wastes to molten basic oxygen furnace steel slag (BOFS). The effects of the composition of the modifying component and the modification parameters on the structure and the cementitious properties of modified steel slag (MSS) are investigated in a laboratory, and a pilot-scale modification research is conducted. Results indicate that the appropriate ratio of BOFS, electric arc furnace steel slag (EAFS) and coal bottom ash in MSS is 85:12.75:2.25. The modification can reduce the free-CaO content of pilot-scale MSS and remarkably improve its cementitious property. The mineralogical composition and the structure of BOFS can be modified by reacting it with EAFS and coal bottom ash at a high temperature generated by the waste heat of the molten steel slag.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2013.07.068