Reciclagem de resíduo de caulim e granito para produção de blocos e telhas.

Abstract

In the last few years the mining industries, especially those which process lime and granite, have been regarded as sources of pollution and/or environmental contamination due to the great quantities of residues produced and frequently thrown into the ecosystems without any previous treatment to obliterate or reduce its harming components. This project aims especially to evaluate the potential use of residues from lime and granite industrial process of plants in Paraiba and Rio Grande do Norte to produce alternative ceramic mortars to make bricks and tile. Physical and mineralogical characterization experiments were carried out such as: grain analysis, chemical analysis, and raw material X-ray diffraction of the alternative raw materials in the form of residues and conventional plastic and nonplastic raw materials. The technical tests to the use in red clay were conducted according to the methods of SOUZA SANTOS, SLAGE & BAZARGHI and of ABNT rules. The results indicated that the studied residues presented physical and mineralogical features adequate to be used as alternative raw material to make red clay to produce solid bricks, hollow bricks and tiles.