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Air Quenching of Steel slag to Enhance its Hydraulic Activity for Recycling the Slag as Meterials in Cement and Concrete Applications
Department of Ferrous Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
School of Materials Science and Engineering, Beifang University of Nationalities, Yinchuan, Ningxia.
School of Materials Science & Engineering, Beifang University of Nationalities, Yinchuan, Ningxia.
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2017 (English)In: Key Engineering Materials, ISSN 1013-9826, E-ISSN 1662-9795, Vol. 737, 488-493 p.Article in journal (Refereed) Published
Abstract [en]

A steel slag has been treated by air granulation, in order to enhance cementitious properties of the slag. Two samples with sizes ranged 1.68-2.38mm and 212-297μm and coded as Slag A and Slag B, respectively, were chosen from the granulated slag for investigations. A sample of the original steel slag was also studied. XRD analyses indicated the formations of α-C2S, β-C2S, C2F, C2MS2, f-MgO and α-C2S, C2F, f-MgO in Slag A and Slag B, respectively. The phases in the two slag samples were quite different from the phases found in steel slag. The SEM results show a reduction of C2S sizes from 10-20μm for the steel slag to nano-scales by air quenching for Slag B. This treatment of air quenching has increased the cumulative heat of hydration to 105.35J/g measured for Slag B, almost two times greater than that of the steel slag. The study results demonstrate a high potential for utilizations of the steel slag in cement and concrete applications after the slag treatment by air quenching. The treatment may thus lead to an environmental friendly and cost-effective recycling for the steel slag. This can also contribute to the sustainable developments in the steel and cement/concrete industries.

Place, publisher, year, edition, pages
Trans Tech Publications, 2017. Vol. 737, 488-493 p.
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-63511DOI: 10.4028/www.scientific.net/KEM.737.488Scopus ID: 2-s2.0-85027060966OAI: oai:DiVA.org:ltu-63511DiVA: diva2:1098176
Conference
2016 International Conference on Material Science and Engineering Technology, ICMSET 2016, Phuket, Thailand, 14-16 October 2016
Note

Konferensartikel i tidskrift

Available from: 2017-05-23 Created: 2017-05-23 Last updated: 2017-11-24Bibliographically approved

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Yang, QixingLiu, GuiqunLiang, JiangEngström, FredrikBjörkman, Bo

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