Desenvolvimento e caracterização mecânica de placas cimentícias reforçadas com tecido de juta e malva e substituição parcial do cimento por metacaulinita

Abstract

This research presents the development and mechanical characterization of cementitious plates reinforced with jute and mauve fabric. Matrices with calcium hydroxide reduction were used by replacing cement with metakaolinite. In addition, the use of this is justified by its physical-chemical characteristics and the granulometry close to that of the cement used. The cementitious slabs were molded using a pneumatic injection system, using 350 x 350 mm acrylic forms, with four layers of jute and mauve fabric as reinforcement. Techniques for characterizing the materials were used, such as X-ray fluorescence, X-ray diffraction, specific mass determination, laser granulometry, scanning electron microscopy, thermogravimetry, infrared spectroscopy, among others. Through these it was possible to check the suitability of the materials for the development of the composite. For analysis of the mechanical behavior and evaluation of the effects promoted by the reinforcements, these plates were submitted to a flexion test at 4 points. Thus, it was possible to conclude that the samples produced with the substitution of metakaolin in relation to cement obtained better results. In addition, no significant difference was observed in terms of resistance in relation to the treatment of hornification implemented in the tissues.