Characterization and rehabilitation of the “Porta Férrea” stone materials, University of Coimbra, Portugal

Characterization and rehabilitation of the “Porta Férrea” stone materials, University of... The “Porta Férrea” (Iron Gate) is the main access to the “Paço das Escolas” (University Palace) at the University of Coimbra, Portugal. It has undergone several adaptations and reconstructions from an original castle gate until the present portal that was built in 1634. The inscription of “University of Coimbra, Alta and Sofia” in the UNESCO Word Heritage list increased the interest in developing conservation works and to do the characterization of the limestone materials of the “Porta Férrea” portal. To support the conservation works, a research project was developed. The intervention plan, the sampling and testing performed and the conservation developed are presented. The rock material in the portal is the Ançã limestone, showing very high porosity around 30%, creating quite important degradation and conservation problems. The deterioration pattern, analyses performed, and the conservative works are presented. In this study it can be confirmed that Ançã limestone of “Porta Férrea” do not decay according a theoretical predictable pattern in response to polluted environments, as the defined for Portland limestone, assuming erosion rates and forms controlled by a range of micro-environment conditions particularly related with architectural constraints. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Earth Sciences Springer Journals

Characterization and rehabilitation of the “Porta Férrea” stone materials, University of Coimbra, Portugal

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Earth Sciences; Geology; Hydrology/Water Resources; Geochemistry; Environmental Science and Engineering; Terrestrial Pollution; Biogeosciences
ISSN
1866-6280
eISSN
1866-6299
D.O.I.
10.1007/s12665-018-7587-z
Publisher site
See Article on Publisher Site

Abstract

The “Porta Férrea” (Iron Gate) is the main access to the “Paço das Escolas” (University Palace) at the University of Coimbra, Portugal. It has undergone several adaptations and reconstructions from an original castle gate until the present portal that was built in 1634. The inscription of “University of Coimbra, Alta and Sofia” in the UNESCO Word Heritage list increased the interest in developing conservation works and to do the characterization of the limestone materials of the “Porta Férrea” portal. To support the conservation works, a research project was developed. The intervention plan, the sampling and testing performed and the conservation developed are presented. The rock material in the portal is the Ançã limestone, showing very high porosity around 30%, creating quite important degradation and conservation problems. The deterioration pattern, analyses performed, and the conservative works are presented. In this study it can be confirmed that Ançã limestone of “Porta Férrea” do not decay according a theoretical predictable pattern in response to polluted environments, as the defined for Portland limestone, assuming erosion rates and forms controlled by a range of micro-environment conditions particularly related with architectural constraints.

Journal

Environmental Earth SciencesSpringer Journals

Published: Jun 5, 2018

References

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