Recycling of Granite Waste from Sawing Operation in Clay Brick for Civil Construction

Carlos M. F. Vieira, Bertácia M. da Silva, and Juliana P. R. G. Carvalho

State University of the North Fluminense, Campos dos Goytacazes, RJ, Brazi

Abstract: In This work has as its objective to evaluate the effect of ornamental rock powder waste incorporation in an industrial clayey body used for roofing tiles fabrication. Formulations with 0, 10, 20 and 30 wt.% of waste were prepared by substitution of sand in the industrial clayey body. Specimens were fabricated by 18 MPa uniaxial pressure and then fired from 850 to 1100°C. The specimens were tested to determine the water absorption, linear shrinkage and three points bending flexural strength. The results indicate that the use of 10 wt.% of waste in total substitution of sand increased the mechanical strength of the ceramic fired at 900°C. Incorporation in higher amounts decreased the mechanical strength. On the other hand, the mechanical strength of the industrial clayey body fired at higher temperatures was increased with any amount of the waste incorporated.

 Key words: brick, clay, granite waste, recycling