Uso da termografia para avaliação de manifestações patológicas no sistema de fachadas com revestimentos cerâmicos: estudo laboratorial

Abstract

The application of ceramic tiles on facades is associated with many benefits such as ease of cleaning and maintenance, durability and aesthetic value. However, there are still several pathologies that directly interfere in the performance of this constructive system. Infrared thermography has been used for the detection and characterization of pathologies since it has the advantage of an easy inspection. Despite the fast and non-contact results, this technique still presents numerous uncertainties regarding the performance of the facade test. Therefore, façade prototypes were constructed in the laboratory, in the form of mortar plates, on which pathologies such as artificial discolouration, mortar frailization for the simulation of cracks and moisture were implemented. With the aid of infrared thermography, a methodology was created with an HT7 term to identify pathologies through a qualitative analysis. Digital thermography can be applied qualitatively as a technique for inspection of samples and ceramic detachments. In these two cases, it is important that the thermographic field test be performed in the first hours of the sunny days, since the temperature increase in the facades negatively influence the identification of these pathologies. By the line of the sequential and the identification of the artery has not been identified, with the HT7 thermocouple, of the cracks in the prototypes of facades. Thus, there is a need for advanced techniques to obtain such a complete diagnosis of this pathological manifestation.