Identificaçao de patologias em revestimentos cerâmicos de fachadas por meio de termografia

Detalhes bibliográficos
Ano de defesa: 2016
Autor(a) principal: Fabiola Martins Mesquita Pereira Nunes
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Minas Gerais
UFMG
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/1843/RAOA-BAUL22
Resumo: The use of non-destructive thermal evaluation (NDTE) is increasingly common mainly due to the non-intrusive and non-destructive nature of this technology, also the ease of operation of the equipment and reduced time to obtain the resulting images, which allows interpretation in loco. Infrared thermography is used to measure the surface temperature of different materials by means of capture of thermal radiation on the surface, and can be applied in various situations, as to detect objects in non-lit environments, identification of hidden defects, building inspections, among others. The use of thermography in facades analysis has some advantages, since there is no need to conduct tests directly in the coating (such as the percussion test, or the search for identification of a "hollow sound" in a ceramic coating system), which streamlines the evaluation process, and enables the evaluation of a large area in a single inspection. Pathologies related to the adherence of ceramic tile facades are common, and it is important to identify those, because they interfere in the architecture and durability of the building. The infrared thermography would be an option to identify such conditions, however, there are some parameters that need to be considered and may influence this technique (as the emissivity of the material, temperature, relative humidity and transmissivity of the medium). The purpose of this work is to identify and characterize injuries that occur on façades using active infrared thermography. In order to achieve this, samples of structural ceramic blocks were built using ceramic tile placed correctly and placed with purposely inserted defects. Such results were compared with those obtained by theoretical simulation. The results show that thermography can identify temperature differences relevant to the analysis of conditions, but due to the short analysis time after the laying of the coating, the conditions have not developed properly and thus have not been identified in this study