Abstract
Salt crystallisation process is one of the most powerful weathering agents in stone materials, especially in the coastal areas, where sea-spray transports large amount of salts on the stone surface. The consolidation of such degraded stone material represents a critical issue in the field of restoration of cultural heritage. In this paper, the nanolime consolidation behaviour in limestone degraded by salt crystallization has been assessed. For this purpose, a stone material taken from a Sicilian historical quarry and widely used in the eastern Sicilian Baroque architecture has been artificially degraded by the salt crystallization test. Then degraded samples have been treated with NanoRestore®, a suspension of nanolime in isopropyl alcohol. To evaluate the consolidating effectiveness, the peeling test and point load test were performed. Moreover, mercury intrusion porosimetry has been executed to evaluate the variations induced by treatment, while colorimetric measurements have been aimed to assess aesthetical issues.
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This work was financially supported by national research project IT@CHA—Tecnologie Italiane per applicazioni avanzate nei Beni Culturali (Advanced Italian technology for Cultural Heritage).
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Ruffolo, S.A., La Russa, M.F., Aloise, P. et al. Efficacy of nanolime in restoration procedures of salt weathered limestone rock. Appl. Phys. A 114, 753–758 (2014). https://doi.org/10.1007/s00339-013-7982-y
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DOI: https://doi.org/10.1007/s00339-013-7982-y