Laboratory assessment of a photoactive Gypsum-based repair plaster

0559542 - ÚACH 2023 RIV US eng J - Journal Article
Svorová Pawełkowicz, Sylwia - Svora, P. - Prošek, Z. - Keppert, M. - Vejmelková, E. - Murafa, Nataliya - Sawoszczuk, T. - Syguła–Cholewińska, J. - Bíbová, Hana
Laboratory assessment of a photoactive Gypsum-based repair plaster.
Construction and Building Materials. Roč. 346, SEP (2022), č. článku 128426. ISSN 0950-0618. E-ISSN 1879-0526
R&D Projects: GA ČR(CZ) GA18-26297S; GA MŠMT(CZ) LM2018124
Research Infrastructure: CzechNanoLab - 90110
Institutional support: RVO:61388980 ; RVO:61388955
Keywords : Gypsum * Photoactivity * Repair plaster * Titanium dioxide
OECD category: Inorganic and nuclear chemistry; Physical chemistry (UFCH-W)
Impact factor: 7.4, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.conbuildmat.2022.128426

Air pollutants, such as nitrogen oxides (NO and NO2), have a negative impact on the built cultural heritage. In order to reduce it, a photoactive repair plaster for conservation of various gypsum decorations, in particular moulded elements, has been developed in compliance with the requirements of conservators-restorers international community. Hence, the composition of the repair plaster is based on traditional materials (plaster of Paris) with the admixture of a modern material – photoactive titanium dioxide (TiO2) in different weight concentrations 0.5 %, 1 %, 1.5 %, 2 %. The paper presents the results of mechanical, photoactivity and microbiological tests along with the phase analysis and a study of the microstructure of the repair plaster specimens. Several analytical techniques were applied to characterize them, such as X-ray powder diffraction (XRD) and electron microscopy (SEM, TEM) coupled with energy dispersive X-ray spectroscopy (EDS). The results show that gypsum/TiO2 repair plaster can be an effective solution for historical monuments struggling with high air pollution.
Permanent Link: https://hdl.handle.net/11104/0332901