EAFD-loaded vitreous and glass–ceramic materials |
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| Affiliation: | 1. Physics Department, Aristotle University, 541 24 Thessaloniki, Greece;2. Department of Chemistry, Aristotle University, 541 24 Thessaloniki, Greece;1. Department of Environmental Science and Engineering, Tunghai University, Taichung City 407, Taiwan;2. Department of Environmental Engineering, National Cheng-Kung University, Tainan City 701, Taiwan;1. Hadley Group Technology, Hadley Industries plc, Downing Street, Smethwick, West Midlands B66 2PA, United Kingdom;2. Department of Engineering and Design, University of Sussex, Sussex House, Brighton BN1 9RH, United Kingdom;3. Honorary Senior Research Fellow, Department of Engineering and Design, University of Sussex, Sussex House, Brighton, BN1 9RH, United Kingdom;1. Department of Civil Engineering, Tsinghua University, Beijing 100084, PR China;2. Shanghai Construction Group, Shanghai 200080, PR China;1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;2. Department of Mechatronics Engineering, Guangzhou Modern Information Engineering College, Guangzhou 510663, China;1. University of Belgrade, Institute of Nuclear Sciences ‘‘Vinca’’, Laboratory for Thermal Engineering and Energy, P.O. Box 522, 11001 Belgrade, Serbia;2. University of Belgrade, Faculty of Mechanical Engineering, Innovation Centre, Kraljice Marije 16, 11120 Belgrade 35, Serbia;3. University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11120 Belgrade 35, Serbia |
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| Abstract: | SiO2, Na2O and CaO were mixed and co-melted with electric arc furnace dust waste. The resulting vitreous materials, produced by quenching at ambient atmosphere, were transformed into glass–ceramics by two-stage heat treatment, under thermal conditions that were determined by differential thermal analysis. X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry and transmission electron microscopy were employed to investigate the physical properties of all products. It was found that whilst wollastonite (CaSiO3) separates from the parent matrix as the dominant crystalline phase in all glass–ceramic products, the crystallization mode depends on the batch composition. Leaching tests evidenced that vitreous products were chemically durable. Devitrification did not significantly affect leach resistance so glass–ceramic materials retain the leach resistance that was achieved by vitrification. |
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