Application of Nanolimes for the Consolidation of Limestone from the Medieval Bishop's Palace, Lincoln, UK
| Autor: | Jorge Otero, Ronald Blakeley, Belinda Colston, Francesca Gherardi |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Studies in Conservation. 65:P90-P97 |
| ISSN: | 2047-0584 0039-3630 |
| DOI: | 10.1080/00393630.2020.1752436 |
| Popis: | Nanolimes are the first nanomaterials used in heritage conservation for natural stone consolidation. Thanks to their size, they show good penetration depth into the substrates, high reactivity resulting in a faster carbonation process, and the ability to bridge cracks through the formation of a network of calcium carbonate cement. Two commercial nanolimes (Calosil, IBZ Salztchemie and Nanorestore, CSGI) and a dispersion of Ca(OH)2 nanoparticles, synthesized by an anionic exchange process, were applied to fresh and naturally weathered limestone specimens, previously removed from the Lincoln Medieval Bishop's Palace (Lincoln, UK). A protocol of non-destructive tests was defined to study the treatment effectiveness, both in the laboratory and on-site. The two commercial nanolimes exhibit a low penetration depth, accumulating on the surface and creating a white glazing, and lead to a small increase in surface hardness. On the contrary, the laboratory-synthesized consolidant was able to effect a good superficial consolidation, without affecting the water absorption and aesthetic properties of the specimens. These results, together with those obtained from the application and monitoring of the consolidants on-site, will be crucial for the design of interventive conservation at the Bishop’s Palace. |
| Databáze: | OpenAIRE |
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