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Self-cleaning ability of gypsum-cement-pozzolan binders based on thermally processed red gypsum waste of titanium oxide manufacture
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SYSNO ASEP 0584263 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Self-cleaning ability of gypsum-cement-pozzolan binders based on thermally processed red gypsum waste of titanium oxide manufacture Author(s) Sotiriadis, Konstantinos (UTAM-F) RID, ORCID, SAI
Kiyko, P. I. (RU)
Chernykh, T. N. (RU)
Kriushin, M. V. (RU)Number of authors 4 Article number 109009 Source Title Journal of Building Engineering. - : Elsevier - ISSN 2352-7102
Roč. 87, June (2024)Number of pages 14 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords red gypsum waste ; titanium oxide ; gypsum-based binder ; photocatalytic activity ; self-cleaning OECD category Materials engineering Method of publishing Limited access Institutional support UTAM-F - RVO:68378297 UT WOS 001218913100001 EID SCOPUS 85187209933 DOI 10.1016/j.jobe.2024.109009 Annotation A recycling solution for landfilled red gypsum waste originating from titanium oxide manufacture (sulfate method), is proposed. The waste consisted mainly of gypsum, goethite, and free titanium oxide as indicated by thermal and x-ray diffraction analyses, and scanning electron microscopy. Photocatalytically active beta gypsum, with physical properties typical for building gypsum, was obtained by thermal treatment (140–190 ◦C) of the waste. On its basis, gypsum-cement-pozzolan binders of variable beta gypsum content were prepared. The binders ensured compressive strength of at least 9 MPa at 28 days, structural stability over time, and appropriate distribution of titanium oxide, irrespective of the beta gypsum content in the mixture. Optimal water resistance and self-cleaning ability were achieved for 63–70% beta gypsum content, which triggered a small increase (~5%) in porosity. The results suggest the utilization of the developed binder as selfcleaning plaster on structures exposed to atmospheric pollutants. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2025 Electronic address https://doi.org/10.1016/j.jobe.2024.109009
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