Cit:Caroselli.etal:2021
| Autor | Caroselli, M.; Iazurlo, P.; Acquistapace, G.; Uccelli, M.; Guglielmetti, M.; Pidò, A.; Piqué, F. |
| Jahr | 2021 |
| Titel | How to live with soluble salts: the conservation of the 9th and 12th c. wall paintings at Riva san Vitale (CH) |
| Bibtex | @inproceedings { Caroselli.etal:2021,
title = {How to live with soluble salts: the conservation of the 9th and 12th c. wall paintings at Riva san Vitale (CH)}, booktitle = {Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures}, year = {2021}, editor = {Lubelli, B.; Kamat, A.A.; Quist, W.J.}, pages = {345-354}, publisher = {TU Delft Open}, note = {The Baptistery of San Giovanni in Riva San Vitale (Switzerland) is an extraordinary example of early Christian architecture dating back to the 5th century. It contains some of the earliest wall paintings of the Canton Tessin, dating from the 9th to 15th century, often overlapping in a complex stratigraphy and surviving only in portions. Between 1953 and 1955 the building underwent an important architectural and painting restoration project. Since 2017 the University of Applied Sciences and Arts of Southern Switzerland (SUPSI) is involved in the study and conservation of the wall paintings. Following preliminary research aimed to collect background information, a thorough condition assessment identified and mapped the different deterioration phenomena affecting the interior surfaces. The most challenging deterioration problem is related to the presence of soluble salts. The on-going diagnostic study includes the identification of the salts, their crystalline habits and the interior microclimate. This is necessary to plan an adequate intervention to stabilize the wall paintings. Salts efflorescence were analyzed with Polarized Light Microscopy and FT-IR ATR spectroscopy. Moisture distribution and hygroscopicity were assessed in various interior and exterior points through microcore sampling. The results showed that salt efflorescences are mainly composed of gypsum and epsomite and that moisture is present due to capillary rise and infiltrations. The presence of gypsum is due to materials used in previous interventions. The deterioration mechanism is on-going and during the first wall painting conservation campaign ( Fall of 2020)the decision was taken not to treat the areas actively affected by salts, but to monitor them over time in order to understand their behaviors and take an educated decision in the near future.}, key = {SWBSS 2021}, url = {https://predict.kikirpa.be/wp-content/uploads/2021/12/SWBSS2021_Procedings.pdf}, author = {Caroselli, M. and Iazurlo, P. and Acquistapace, G. and Uccelli, M. and Guglielmetti, M. and Pidò, A. and Piqué, F. } } |
| DOI | |
| Link | |
| Bemerkungen | in: Lubelli, B.; Kamat, A.A.; Quist, W.J. (Hrsg.): Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures,TU Delft Open 345-354 |
Eintrag in der Bibliographie
| [Caroselli.etal:2021] | Caroselli, M.; Iazurlo, P.; Acquistapace, G.; Uccelli, M.; Guglielmetti, M.; Pidò, A.; Piqué, F. (2021): How to live with soluble salts: the conservation of the 9th and 12th c. wall paintings at Riva san Vitale (CH). In: Lubelli, B.; Kamat, A.A.; Quist, W.J. (Hrsg.): Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures,TU Delft Open 345-354, Webadresse. |  |
Keywords[Bearbeiten]
Soluble salts, monitoring, conservation work
Abstract[Bearbeiten]
The Baptistery of San Giovanni in Riva San Vitale (Switzerland) is an extraordinary example of early Christian architecture dating back to the 5th century. It contains some of the earliest wall paintings of the Canton Tessin, dating from the 9th to 15th century, often overlapping in a complex stratigraphy and surviving only in portions. Between 1953 and 1955 the building underwent an important architectural and painting restoration project. Since 2017 the University of Applied Sciences and Arts of Southern Switzerland (SUPSI) is involved in the study and conservation of the wall paintings. Following preliminary research aimed to collect background information, a thorough condition assessment identified and mapped the different deterioration phenomena affecting the interior surfaces. The most challenging deterioration problem is related to the presence of soluble salts. The on-going diagnostic study includes the identification of the salts, their crystalline habits and the interior microclimate. This is necessary to plan an adequate intervention to stabilize the wall paintings. Salts efflorescence were analyzed with Polarized Light Microscopy and FT-IR ATR spectroscopy. Moisture distribution and hygroscopicity were assessed in various interior and exterior points through microcore sampling. The results showed that salt efflorescences are mainly composed of gypsum and epsomite and that moisture is present due to capillary rise and infiltrations. The presence of gypsum is due to materials used in previous interventions. The deterioration mechanism is on-going and during the first wall painting conservation campaign (Fall of 2020) the decision was taken not to treat the areas actively affected by salts, but to monitor them over time in order to understand their behaviors and take an educated decision in the near future.