Abstract

The processing of seven typícal single fast- firing wall tile (monoporosa) compositions' was reproduced in laboratory-scale to investigate quartz effects on reducing mechanical properties in fired products. Phases quantities other than quartz were kept constant, varying only quartz quantity and its particle size dislribútion. Processing parameters like humidity, apparent density after dryíng, and firing temperature were compatible with the ones adopted industrially. Post-sintering characterization involved a three-point bending test for modulus of rupture determination, besides thermal, mineralogical, and microstructural analysis through Dilalomelry, X-ray, Diffraction, and Optical and canning Electrón Microscópy. A more evident effect of quartz quantities rather than quartz particle size on thermal expansión coefficient and modulus of rupture was observed.