Formulação e caracterização de bloco baritado para alvenaria estrutural

Abstract

In Brazil, the ceramic industry has a share of about 1% in national GDP. For the use of clays in industrial processes, a complete identification of the type of clay and its properties is important and indispensable. Establishing which formulations and processing conditions is most appropriate to obtain products with the desired final properties. In this sense, the research proposed proposes the percentage substitution of the barite (BaSO4), a compound used to manufacture structural blocks and coatings for the medical area, which despite its property in retaining / isolating gamma rays from equipment with emission of X-rays , The brick blocks are more prone to fracture or rupture of the structures due to the degree of crystallinity of the barite. The research investigated alternative materials (kaolinite, white kaolin, red kaolin and calcite) as possible substituents of the baryta, in order to obtain a structural block less successive to fractures or deformations. The clays were analyzed by X-Ray Diffraction, X-Ray Fluorescence Spectroscopy, Optical Microscopy, Scanning Electron Microscopy with Dispersive Energy Spectroscopy, and it was verified that by the chemical analysis they determined the elements and compounds belonging to the formulation of calcite samples, White kaolin, red kaolin, kaolinite, and barite. Through the results obtained in the process of fabrication of the specimens and the mechanical tests, it can be verified that the ceramic blocks baritas with 1.24 centimeters of thickness presented satisfactory capacity of effort, important for structural application. The mechanical tests evidenced the materials present approximately equal results, due to the granulometric uniformity in mesh of 30 Mesh. The formulation with white kaolin with proportions of 9.6 g and 12 g was highlighted by the flexural strength, 8.0 and 9.0 kgf. / Cm², respectively. In this way, the possibility of reducing the baryte and incorporating white kaolin was observed, in which the incorporation of the alternative material in the production and characterization of a barite block for structural application can be suggested to the effective formulation process.