Effect of mechanical activation on the hydraulic properties of stainless steel slags
| Autor: | Wout Veulemans, Peter Tom Jones, Koen Van Balen, Daneel Geysen, Özlem Cizer, Gilles Mertens, Bart Blanpain, Yiannis Pontikes, Lubica Kriskova, Lucie Vandewalle |
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| Rok vydání: | 2012 |
| Předmět: |
Thermogravimetric analysis
Ladle Materials science Magnesium Metallurgy Argon oxygen decarburization chemistry.chemical_element Building and Construction engineering.material Microstructure law.invention Portland cement Compressive strength chemistry law engineering General Materials Science Periclase |
| Zdroj: | Cement and Concrete Research. 42:778-788 |
| ISSN: | 0008-8846 |
| DOI: | 10.1016/j.cemconres.2012.02.016 |
| Popis: | article i nfo 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, γ-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. |
| Databáze: | OpenAIRE |
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