Investigating the binding potential of continuous casting stainless steel slag by alkali activation
Source abstract
Abstract
The aim of this work was to investigate the binding potential of non-hydraulic, crystalline continuous casting stainless steel slag, which is a by-product from stainless steel production, by alkali activation with sodium hydroxide and potassium hydroxide. Calorimetric analysis of the activated slag showed low cumulative heat evolution at 20°C. Slag mortars did not harden at this temperature. Considerable enhancements in heat evolution and hardening were observed at 80°C. The resulting hydrated slag showed the formation of calcium silicate hydrate type reaction products and brucite in thermogravimetric analysis. X-ray diffraction analysis showed a reduction in the amount of γ-dicalcium silicate and periclase. Elemental mapping showed the presence of calcium, silicon and minor amounts of magnesium in the hydrated phase. An optimum activator dosage of 7·5M of sodium hydroxide or potassium hydroxide was found to generate the highest amount of reaction products and compressive strength.
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Research context
OpenAlex topics: Concrete and Cement Materials Research · Magnesium Oxide Properties and Applications · Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Doctoral Researcher, Department of Civil Engineering, KU Leuven, Leuven, Belgium
Assistant Professor, Department of Civil Engineering, KU Leuven, Leuven, Belgium
Post-doctoral Researcher, Department of Metallurgy and Materials Engineering, KU Leuven, Leuven, Belgium
Post-doctoral Researcher, Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium
Professor, Department of Civil Engineering, KU Leuven, Leuven, Belgium
Professor, Department of Metallurgy and Materials Engineering, KU Leuven, Leuven, Belgium
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