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Authors
Abstract(s)
O presente trabalho apresenta um estudo laboratorial que teve como finalidade o reconhecimento de perda de propriedades da madeira de edifícios antigos quando degradada por carunchos. Foi estudada madeira antiga de pinho e de choupo, com idades compreendidas entre 100 e 200 anos.
Como abordagem inicial são apresentadas as características da madeira e dos edifícios pombalinos e gaioleiros onde esta era bastante usada, não só como elemento deacabamento, mas principalmente como elemento estrutural. São apresentados os vários fatores que levam à degradação da madeira assim como alguns métodos de avaliação e diagnóstico dos estados de conservação dos elementos de madeira que se encontram nos edifícios.
É também desenvolvido um estudo sobre o caruncho grande e caruncho pequeno, seu ciclo de vida e forma como degrada a madeira, servindo de base ao estudo laboratorial.
No desenvolvimento foi avaliado o estado de degradação de provetes de madeira antiga com 30 x 30 x 90 mm e de seguida correlacionado com a sua resistência à compressão, o seu módulo de elasticidade e a extensão em fase plástica. Desta forma pretende-se estudar o modo como os diferentes estados de degradação por caruncho influenciam as caraterísticas mecânicas das peças de madeira.
Abstract: This paper presents a laboratory study aimed at the recognition of loss properties of wood from old buildings when degraded by woodworm. Antique pine and poplar were studied, with ages between 100 and 200 years. As an initial approach it is shown the characteristics of the timber and “pombalinos” buildings and “gaioleiros” where it was widely used buildings, not only as an element of finish but mainly as a structural element. It is also exposed lists the various factors that lead to degradation of the wood, as well as some methods of assessment and diagnosis of the state of conservation of wooden elements that are found in buildings. It is also developed a study on large and small woodworm life cycle and how the wood degrades, serving as the basis for laboratory study. Through the development, it was evaluated the degradation of 30 x 30 x 90 mm samples of old wood and then correlated with the compression strength , the modulus of elasticity and its extension in the plastic phase. Thus it is intend to study how the different states of degradation by woodworms influence the mechanical properties of the wood.
Abstract: This paper presents a laboratory study aimed at the recognition of loss properties of wood from old buildings when degraded by woodworm. Antique pine and poplar were studied, with ages between 100 and 200 years. As an initial approach it is shown the characteristics of the timber and “pombalinos” buildings and “gaioleiros” where it was widely used buildings, not only as an element of finish but mainly as a structural element. It is also exposed lists the various factors that lead to degradation of the wood, as well as some methods of assessment and diagnosis of the state of conservation of wooden elements that are found in buildings. It is also developed a study on large and small woodworm life cycle and how the wood degrades, serving as the basis for laboratory study. Through the development, it was evaluated the degradation of 30 x 30 x 90 mm samples of old wood and then correlated with the compression strength , the modulus of elasticity and its extension in the plastic phase. Thus it is intend to study how the different states of degradation by woodworms influence the mechanical properties of the wood.
Description
Keywords
Edifícios antigos Old buildings Degradação por caruncho Degradation by woodworm Madeira Wood Estados de conservação State conservation Massa volúmica Percent saturation Resistência mecânica Mechanical resistance Módulo de elasticidade Percentagem de saturação
Citation
MENDES, Sandra Cristina Silva - Degradação da madeira por caruncho em edifícios antigos: uma análise experimental. Lisboa: Instituto Superior de Engenharia de Lisboa, 2013. Dissertação de mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa