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Synthesis, characterization and properties of calcium ferroaluminate belite cements produced with electric arc furnace steel slag as raw material
Authors
GN Angelopoulos
Remus Ion Iacobescu
D Koumpouri
Yiannis Pontikes
Publication date
1 January 2013
Publisher
'Elsevier BV'
Doi
Cite
Abstract
This study investigated the use of 10 (M1), 17 (M2) and 27 wt.% (M3) electric arc furnace steel slag (EAFS) as a raw material in the production of calcium ferroaluminate belite cement clinker, after firing at 1320 C. The thermal behavior of the raw meals was studied by TG/DSC and XRD whereas for the analysis of the clinkers, XRD/QXRD, SEM/EDS and EPMA were employed. The resulting clinker was co-grinded with 5 and 20 wt.% Flue Gas Desulfurization (FGD) gypsum and the properties were determined by a series of tests in accordance to EN standards. The evolution of hydration was investigated by SEM and the development of compressive strength. The results revealed that the formed phases in the clinkers were C2S, C4AF and C 4A3Ŝ. The main hydration products were ettringite, AFm and hydrogarnet. The leached CrVI was below 1 ppm in M3. Compressive strength in cements with 5 wt.% FGD gypsum was (in MPa): 18.3 for M1, 14.3 for M2 and 7.8 for M3 at 28 days, whereas for 20 wt.% FGD gypsum, the values were almost doubled.© 2013 Elsevier Ltd. All rights reserved.publisher: Elsevier articletitle: Synthesis, characterization and properties of calcium ferroaluminate belite cements produced with electric arc furnace steel slag as raw material journaltitle: Cement and Concrete Composites articlelink: http://dx.doi.org/10.1016/j.cemconcomp.2013.08.002 content_type: article copyright: Copyright © 2013 Elsevier Ltd. All rights reserved.status: publishe
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Last time updated on 10/12/2019