Estudo da influência da incorporação dos resíduos de caulim nas propriedades tecnológicas de cerâmica marajoara para obtenção de tijolo ecológico

Abstract

The effects of global climate change are occurring at an unprecedented pace. For this reason, human activities urgently require a paradigm shift to halt this entropic process before the consequences become irreversible. In this context, the use of highly eco-efficient materials aims to conveniently neutralize CO₂. This study aims to incorporate Kaolin waste—KDI (clayey) and KAI (sandy)—into the properties and microstructures of clay mass, assessing its mechanical strength after firing at temperatures of 750 and 950 °C. Within this framework, six formulations were tested, varying from 0% to 50% kaolin waste. The specimens were uniaxially pressed into cylindrical shapes and then subjected to firing at 750 °C and 950 °C for 2 hours at peak temperature. The raw materials underwent tests that provided a comprehensive characterization of their properties, such as X-ray diffraction (XRD), X-ray fluorescence (XRF), optical microscopy (OM), scanning electron microscopy (SEM), and laser diffraction techniques (LD). After mixing and forming the materials into test specimens with different compositions, they were uniaxially pressed in cylindrical molds and subjected to compression testing. The results demonstrated the feasibility of using these wastes, showing favorable outcomes for their incorporation into red ceramics for the production of ceramic products in compliance with current standards.