Title: Effect of mechanical activation on the hydraulic properties of stainless steel slags
Authors: Kriskova, Lubica ×
Pontikes, Yiannis
Cizer, Özlem
Mertens, Gilles
Veulemans, Wout
Geysen, Daneel
Jones, Peter Tom
Vandewalle, Lucie
Van Balen, Koen
Blanpain, Bart #
Issue Date: Jun-2012
Publisher: Pergamon Press
Series Title: Cement and Concrete Research vol:42 issue:6 pages:778-788
Abstract: This work aims to assess the possibility of using ladle metallurgy and argon oxygen decarburization stainless steel slag as a hydraulic binder after mechanical activation. Prolonged milling in ethanol suspension resulted in 10-fold increase of the surface area and increase of the amorphous phase. Calorimetric analysis of slags mixed with water indicated the occurrence of exothermic reactions. XRD results revealed that periclase, merwinite, gamma-C2S and bredigite, decreased with hydration time. Thermogravimetric analyses indicated that the main hydration products are most probably C-S-H, CH and MH. The hydrated products in both slags were similar to C-S-H gel. WDS analysis demonstrated Ca and Si to be widespread in the structure. Formation of M-S-H gel or incorporation of Mg in the C-S-H gel remains uncertain. The 90 days compressive strength of mortars prepared from slags reached approximately 20% for LM and 10% for AOD of the compressive strength of mortars prepared from OPC. (C) 2012 Elsevier Ltd. All rights reserved.
ISSN: 0008-8846
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Surface and Interface Engineered Materials
Building Materials and Building Technology Section
Sustainable Metals Processing and Recycling
× corresponding author
# (joint) last author

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