Tratamento da humidade ascensional no património histórico
Abstract
RESUMO
A humidade ascensional associada aos sais é um fator de degradação das paredes dos edifÃcios antigos, pelo que se exige o conhecimento do seu comportamento higrotérmico, bem como o conhecimento das técnicas de tratamento e da sua eficácia. O tratamento, face à humidade ascensional, é muito complexo e muitas das técnicas para solucionar o problema não apresentem a eficácia desejável. O Laboratório de FÃsica das Construções da Faculdade de Engenharia da Universidade do Porto tem desenvolvido investigação numérica e experimental que permitiu validar uma tecnologia baseada na ventilação higroregulável da base das paredes para tratar a humidade ascensional, patenteando o sistema – HUMIVENT.
Nesta comunicação descrevem-se as patologias associadas à humidade ascensional; as vantagens e inconvenientes das tecnologias disponÃveis no mercado para o seu tratamento; caracteriza-se o sistema – HUMIVENT, a sua implementação em edifÃcios em Portugal e a análise dos resultados obtidos.
Palavras chave: humidade ascensional; património histórico; sistema higroregulável.
ABSTRACT
Rising damp linked with the salts is a factor in old buildings walls degradation, which requires knowledge of its higrothermal behavior, as well as the treatment techniques and its effectiveness knowledge. The rising damp treatment is very complex and many of the techniques to solve the problem do not show the desirable effectiveness. The Building Physics Laboratory of the Faculty of Engineering of the University of Porto has developed numerical and experimental research that allowed the validation of a technology based on the wall base hygroregulated ventilation to treat rising damp, patent the system-HUMIVENT.
This paper aims to describe the pathologies associated to rising damp; the advantages and disadvantages of the most common available technologies for its treatment; characterize the rising damp treatment system-HUMIVENT, their implementation in Portuguese buildings and the analysis of the obtained results.
Keywords: rising damp; historical building; hygroregulated system.
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References
Colombert, R. (1975). “L’Humidité des bâtiments anciens; Causes et effetsâ€; Diagnostic et remèdes, Paris, Editions du Moniteur, 182 pgs.
Freitas, V.P.de (1992). “Transferência de humidade em paredes de edifÃciosâ€, PhD Thesis. FEUP, Porto, Portugal.
Freitas, V.P.de, Guimarães, A. S. (2008). “Characterization of a hygro-regulated Wall Base Ventilation System for Treatment of Rising Damp in Historical Buildingsâ€. Proceedings of the 2nd Nordic Symposium on Building Physics, pp 911-919 – Copenhagen, Denmark.
Freitas, V.P. de, Torres, M.I.M., Guimarães, A. S. (2008) “Humidade Ascensionalâ€, FEUP edições; ISBN . 978-972-752-101-2; 1.ª edição, Porto.
Guimarães, A. S. (2008). “Caracterização Experimental do Funcionamento de Sistemas de Ventilação da Base das Paredes para Tratamento da Humidade Ascensionalâ€, Master Thesis, FEUP, Porto, Portugal.
Guimarães, A.S. (2011). “Dimensionamento de Sistemas de Ventilação da Base das Paredes para Tratamento da Humidade Ascensionalâ€, Tese de Doutoramento, Faculdade de Engenharia da Universidade do Porto – FEUP, Porto, Portugal.
Guimarães, A. S., Delgado, J. M. P. Q., Freitas, V. P. de, (2010), “Mathematical Analysis of the Evaporative Process of a New Technological Treatment of Rising Damp in Historic Buildingsâ€, Building and Environment, Vol. 45 (11), 2414-2420.
Holm, A.; Kunzel, H.M. (2003). “Proceedings of the 2nd international conference on building physicsâ€, pp 363-367 - Leuven, Belgium.
Torres, M.I.M. (2004). “Humidade Ascensional em Paredes de Construções Históricasâ€, tese de Doutoramento, Coimbra, FCTUC.
Torres, M.I.M., Freitas, V.P. (2003). “Rising damp in historical buildings - Research in Building Physicsâ€, Proceedings of the 2nd international conference on building physics, pp 369-375 - Leuven, Belgium.
Torres, M.I.M., Freitas, V.P. (2006). “Avaliação da eficiência da ventilação da base das paredes em função da sua espessura no tratamento das humidades ascensionaisâ€, Patorreb 2006 – Porto, Portugal. WORLD INTELECTUAL PROPERTY ORGANIZATION. http://www.wipo.int/pctdb/en/wo.jsp?WO=2010093272 (12/05/2010).
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