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Enhanced consolidation efficacy and durability of highly porous calcareous building stones enabled by nanosilica-based treatments

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Science China(Technological Sciences) 2023年第8期66卷 2197-2212页

作者： CAO YiJian CAMAITI Mara endrizzi monica FORTI Giorgio VERGANI Ernesta FORTI Ilaria Institute of Culture and Heritage Northwestern Polytechnical UniversityXi’an 710072China CNR-Institute of Geosciences and Earth Resources Florence 50121Italy monica endrizzi conservative art restoration Casale sul Sile-Treviso 31032Italy Forti Architecture Studio Verona 37121Italy Ernesta Vergani restoration of Works of art Volpago del Montello-Treviso 31040Italy Ernesta Vergani restoration of Works of art Cannaregio 4056Venezia 30121Italy UniversitàIUAV di Venezia Venezia 30135Italy

Outdoor building stones are suffering from serious *** restore internal cohesion and to alleviate the disintegration of decayed stones,consolidation treatment is necessary and *** to date,no fully satisfactory consolidation agent and its application methodology are available,mainly due to the limited penetration depth of consolidants,low compatibility,or poor durability in environmental ***,in this study,aiming to design an effective and enduring method for the consolidation of highly porous calcareous stones,nanosilica-based consolidation treatments were tested and compared with traditional compounds(tetraethoxysilane,alkylalkoxysilane,barium hydroxide).In order to evaluate their performance and compatibility,a series of standard tests,including the Drilling Resistance Measurement System(DRMS)test,surface color measurement,vapor diffusivity measurement,and peeling test,were carried ***,the penetration depth and distribution profiles of consolidants were estimated by exploiting elemental raster scanning of SEM-EDS analysis performed throughout the thickness of *** importantly,by employing a climatic chamber,the artificial ageing test was also conducted by simulating harsh atmospheric *** accelerated ageing,the performance of all consolidants was assessed *** demonstrated that the application of nanosilica(restoration of historic buildings.

关键词： stone consolidation nanosilica tetraethoxysilane penetration depth durability

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