Simple method for making formulations with several raw materials in masses for structural ceramic

Reference	Presenter	Authors (Institution)	Abstract
13-046	Francisco Rolando Valenzuela-Diaz	SAVAZZINI-REIS, A.(INSTITUTO FEDERAL DO ESPIRITO SANTO); Sagrillo, V.P.(Instituto Federal do Espírito Santo); Valenzuela-Diaz, F.R.(Polytechnic School of the University of São Paulo);	The structural ceramic industry in Brazil presents annual billing of R$ 18 billion, thus contributing to the country's economic scenario. This production demands about 10 million tons of clay per month. There is a great variety of clays with full range of colors, plasticity and chemical composition depending on the formation and change factors during their consolidation, which allow the insertion of several raw materials, such as wastes from different industrial processes and several clays in the clayey formulation used in structural ceramics. With the verification of the ceramic properties in the clayey masses it is possible to verify if the formulations are suitable or not for the intended use. The method of molding spherical specimens to verify the ceramic properties of ceramic mass formulations is presented as a simple method that can be performed in the pottery itself. With this, the objective of the paper is to present the molding methodology of spheres in formulations with several raw materials used for the production of industrial ceramics. Spheres containing various clays and wastes in the composition were shaped to the burning in industrial kiln and evaluation of the ceramic properties. It was verified that the inserted wastes contributed to the improvement of the water absorption, apparent porosity and apparent specific mass in relation to the clayey mass without waste; and the methodology of spheres, for its simplicity and low cost, can be executed in the own pottery in formulations with several raw materials and represents an option for companies to use non-empirical ceramic mass, which results in better quality products and conformity with the standards.
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