Per: FABIO MOREIRA BRITO (UNIVERSIDADE FEDERAL DO PARA), Taiana de Sousa Matos (UNIVERSIDADE FEDERAL DO PARA), Alisson Clay Rios da Silva (UNIVERSIDADE FEDERAL DO PARA), Verônica Scarpini Candido (UNIVERSIDADE FEDERAL DO PARA), Sérgio Neves Monteiro (Universidade Federal do Rio de Janeiro)
Abstract:
Global climate change is increasingly evident and is accelerating at an unprecedented rate. Therefore, human activities urgently need a paradigm shift to interrupt this entropic process before the consequences become irreversible. In this sense, the use of eco-efficient materials aims to conveniently neutralize CO2. X-ray Fluorescence and Scanning Electron Microscopy characterizations were carried out on the raw materials. After that, formulations were created that included 100% clay, 75% kaolin residue with 25% clay, in addition to 75% clay with 25% kaolin residue. Followed by uniaxial pressing into cylindrical specimens and fired at 750ºC for 2 hours. The results showed that with 75% kaolin residue, diametrical shrinkage of 3.8% lower shrinkage compared to the others, compressive strength of 12 MPa above the required average of 2 MPa, in addition, the incorporation of 75% kaolin residue improved the characteristics of the test specimens, reducing the amount of passive environmental waste in the environment, minimizing environmental impacts when disposing of industrial waste and removing clay from nature. After this preliminary characterization, a composition was selected for manufacturing solid brick that presented requirements consistent with the standard for solid bricks, contributing to the reduction of the carbon footprint in civil construction and reuse of waste from the mining industry. Therefore, the objective is to offer the market low-cost products that help reduce the accumulation of waste from the mineral processing industry.
