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Sandstone monuments still standing after storms: Waterproofing and durability protection.
- Source :
-
Journal of Cultural Heritage . Jul2023, Vol. 62, p242-250. 9p. - Publication Year :
- 2023
-
Abstract
- Using the Surface waterproofing to solve moisture expansion which leads to the acceleration of surface weathering of sandstone relics is a hot topic. This study focuses on surface coating protection because of the special status of cultural relics. The fluorinated ZnO/SiO 2 nano-coating was applied on the sandstone matrix in this work. The loading of the fluorinated ZnO/SiO 2 in the nano-coating, the penetration depth of the nano-coating in the sandstone matrix, and the waterproofing effect of the sandstone surface were investigated within the limitation of the color difference systematically. The freeze-thaw cycles, light exposure, water absorption, and aging tests were carried out to evaluate the environmental durability of the nano-coating in a simulated humid environment of southwestern of China. All the tests meet the criteria for the heritage protection color difference. When the loading of fluorinated ZnO/SiO 2 nano-coating is 0.4%, the water contact angle (WCA) and oil contact angle (OCA) are significantly improved, which are larger than 160° and 140°, respectively. The WCA and OCA have little changed after freeze-thaw cycle for three weeks, and the WCA only decreases only 7% after 300 h UV aging treatment. This significantly enhanced stability is due to the good penetration depth of the fluorinated ZnO/SiO 2 nano-coating on the sandstone matrix. Moreover, the excellent air permeability is achieved as well to ensure substrate breathing. This work would provide a new idea for the long-term protection of sandstone heritage in practical environment. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 12962074
- Volume :
- 62
- Database :
- Academic Search Index
- Journal :
- Journal of Cultural Heritage
- Publication Type :
- Academic Journal
- Accession number :
- 169854147
- Full Text :
- https://doi.org/10.1016/j.culher.2023.05.022