Utilização de termografia infravermelha para avaliação de fissuras em fachadas com revestimento de argamassa e pintura

Abstract

Building facades are exposed to the climatic phenomena of the region where they are located. The lack of adequate understanding of the interaction between temperature and humidity and the facade renderings contributes to their degradation. In this context, the monitoring and the study of the effects of these physical aspects are desirable in order to guarantee the durability of the facades. In other countries, infrared thermography is being used as a nondestructive technique to evaluate problems in buildings. This study focuses on the application of thermography in the evaluation of pathologies related to temperature in facade renderings of buildings in the city of Goiania, Brazil. In order to do that, thermal images were made using a thermal camera at different times of the day in the dry season and in the rainy season. In addition, the surface temperature in parts of the facades in the four directions was measured. Finally, the degradation of the facades was mapped with the aid of a computer program. The results demonstrated that some of the cracks mapped were shown in the thermal images. Also, significant differences in surface temperature were observed during the dry season and in the afternoon, resulting in clearer isothermals, making it possible to obtain images that revealed some of the problems mapped.