Abstract
Knowledge of current conservation materials and methods together with those adopted in the past is essential to aid research and improve or develop better conservation options. The infill and painting of tile lacunae are subjected to special requirements mainly when used in outdoor settings. A selection of the most commonly used materials was undertaken and performed based on inquiries to practitioners working in the field. The infill pastes comprised organic (epoxy, polyester), inorganic (slaked lime, hydraulic lime and zinc hydroxychloride) and mixed organic–inorganic (slaked lime mixed with a vinylic resin) binders. The selected aggregates were those most commonly used or those already present in the commercially formulated products. The infill pastes were characterised by SEM, MIP, open porosity, water absorption by capillarity, water vapour permeability, thermal and hydric expansibilities and adhesion to the ceramic body. Their performance was assessed after curing, artificial ageing (salt ageing and UV–Temp–RH cycles) and natural ageing. The results were interpreted in terms of their significance as indicators of effectiveness, compatibility and durability.
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Acknowledgments
The authors acknowledge Fundação para a Ciência e Tecnologia for PhD Grant (SFRH/BD/65824/2009) and financial support for the execution of this work (Project CerAzul: PTDC/CTM-CER/119085/2010). CNS-Comércio de Tintas, Lda., is thanked for supplying the Airocoll S and Nova Terracota SA for providing the ceramic biscuits. Rosario Veiga and Sandro Botas are thanked for the usage of the natural ageing facilities and wall adhesion mortar, respectively. Dória Costa and Inês Cardoso for support on the thermal and hydric expansibilities and SEM analysis.
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Mendes, M.T., Esteves, L., Ferreira, T.A. et al. Lacunae infills for in situ treatment of historic glazed tiles. Appl. Phys. A 122, 547 (2016). https://doi.org/10.1007/s00339-016-0053-4
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DOI: https://doi.org/10.1007/s00339-016-0053-4