Evaluation of the incorporation of Cariri stone in masses of ceramics tiles

Mining and laminated limestone processing operations called Cariri stone, located in the Sedimentary Basin of Araripe, in the southern state is an important economic sector of the State of Ceara. As a result of this operation produces a large amount of waste. This study aims to evaluate the effect of incorporation of this residue in the red ceramic as an alternative raw material for the production of tiles. The compositions were formulated and prepared specimens with 0% content 5%, 10%, 12%, 15% and 20% by weight of residue. The determination of physical and mechanical properties such as loss on ignition, linear shrinkage, water absorption and flexural strength was carried out on specimens uniaxially pressed at 27 MPa and sintered at 900 ° C. The results indicated that for a content to 10% by weight of waste there is an improvement of physical and mechanical properties. On the other hand higher amounts of residue compromise its mechanical properties. (author)