Influência da incorporação de filito e escória de aciaria nas propriedades tecnológicas de cerâmicas estruturais

Abstract

The search for the use of alternative materials and industrial wastes for the production of structural ceramics has been extensively studied in recent times. In this work, it was used clay, phyllite and steel slag in order to produce structural ceramics with improved characteristics and high value. Formulations of structural ceramics were prepared aiming to evaluate the microstructure, as well as the physical and mechanical properties obtained after incorporation of phyllite as a partial replacement of clay, and also the introduction of steel slag as filler. The starting materials were characterized through of X-ray diffraction and X-ray fluorescence. The content of each component were 30 to 35% of slag, 20 to 50% of phyllite and 45 to 50% clay. The specimens were pressed and sintered at temperatures of 900, 1000 e 11000 C, with a heating rate of 10 °C / min and firing threshold of 2 hours. The influence of the components in the ceramic parts were assessed by some tests, which were performed to evaluate the technological properties of potential use, based on results of linear retraction, water absorption, apparent density, apparent porosity and flexural modulus of rupture. The formulations showed as result reduction of porosity and increase of the mechanical strength.