The degradation of the “Study room” (Convent of Christ, Tomar, Portugal), from a preliminary analysis towards a sustainable maintenance

  • Fernando Manuel da Conceição Costa Techn&Art - Technology, Restoration and Arts Enhancement Center, Instituto Politécnico de Tomar https://orcid.org/0000-0002-2726-1679
  • Manuel Alberto Nogueira Henriques Rosa Techn&Art - Technology, Restoration and Arts Enhancement Center, Instituto Politécnico de Tomar https://orcid.org/0000-0003-0768-6714
  • Mattia Canetto University of Cagliari, Faculty of Engineering and Architecture, Italy
  • Maria Júlia Sobral da Fonseca Projetista de Conservação e Restauro em Património Imóvel Classificado
Keywords: limestone, column, crystallization, cellulose-pulp, salt extraction, sustainable

Abstract

Following a comprehensive analysis of the stone degradation of the “Study Room”, in the Crow’s Cloister west wing (Convent of Christ, Tomar, Portugal), a multiapproach plan was made to address the salt problems encountered on its limestone columns. Chemical characterization studies were made to determine the concentration and the type of the efflorescence soluble salts involved, as well as the ionic composition of the limestone material of the column, and also, in which environmental conditions their harmful activity is reduced (or prevented). Finally, on site, the existing cement mortar was removed in a 30 cm area around the base of the column, and the ionic characterization obtained was submitted to the ECOS-RUNSALT software, which determined that simply by fixing the relative humidity at 65±2%, the weathering process would be substantially reduced – conditions different from the ones encountered.

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Author Biographies

Fernando Manuel da Conceição Costa, Techn&Art - Technology, Restoration and Arts Enhancement Center, Instituto Politécnico de Tomar

Professor Adjunto do Instituto Politécnico de Tomar, Investigador Integrado do Techn&Art - Centro de Tecnologia, Restauro e Valorização das Artes. Responsável do laboratório de Conservação e Restauro de Pedra. Professor Especialista Artes Conservação e Restauro. Mestre em Recuperação do Património Arquitetónico e Paisagístico pela Universidade de Évora.

Manuel Alberto Nogueira Henriques Rosa, Techn&Art - Technology, Restoration and Arts Enhancement Center, Instituto Politécnico de Tomar

Licenciado pelo Instituto Politécnico de Tomar em Engenharia Química Industrial, especialização em Tecnologia, Mestre pela Universidade de Aveiro em Métodos Instrumentais e Controlo de Qualidade Analítico e Doutor em Ciências Ambientais pela Universidade de Salamanca. Profissionalmente foi Professor Auxiliar de 2003 a 2016 e Professor desde 2016. Foi Diretor dos Cursos Associados / Fundamentais em Qualidade Ambiental de 2013 a 2019. É membro do Centro de Tecnologia, Restauração e Aprimoramento de Arte (Techn & Art), IPT e publica artigos científicos revisados por pares e desenvolve trabalhos científicos nas áreas de degradação por ação de sais em edifícios e esculturas de pedra.

Mattia Canetto, University of Cagliari, Faculty of Engineering and Architecture, Italy

Formou-se em Arquitetura pela Universidade de Cagliari e fez mestrado em Conservação do Património Arquitetónico e Ambiental pela Universidade de Cagliari.

Maria Júlia Sobral da Fonseca, Projetista de Conservação e Restauro em Património Imóvel Classificado

Licenciada em Conservação e Restauro de Pedra e Mestre em Química Aplicada ao Património Cultural. Foi conservadora-restauradora no Mosteiro de Santa Clara-a-Velha (Coimbra) e Mosteiro de S. João Tarouca (Lamego) e também bolseira da Fundação para a Ciência e Tecnologia. Atualmente é projetista de Conservação e Restauro em Património Imóvel Classificado (Portugal)

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Published
2022-02-16
How to Cite
Costa, F. M. da C., Henriques Rosa, M. A. N., Canetto, M., & Sobral da Fonseca, M. J. (2022). The degradation of the “Study room” (Convent of Christ, Tomar, Portugal), from a preliminary analysis towards a sustainable maintenance . Ge-Conservacion, 21(1), 95-107. https://doi.org/10.37558/gec.v21i1.1052