ANALYSIS OF THE RESISTANCE OF ADHERENCE OF CERAMIC PLATES, PRODUCED WITH DIFFERENT CYCLES OF BURN, THROUGH THE SIMPLE AND DOUBLE COLLAGE

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Abstract
09-035 Guilherme Timboni Teixeira Antunes, E.G.(University of the Extreme South Catarinense); Teixeira, G.T.(University of the Extreme South Catarinense); Wanderlind, A.(University of the Extreme South Catarinense); Piva, J.H.(University of the Extreme South Catarinense); Bernardin, A.M.(Universidade do Extremo Sul Catarinense); Roman, H.R.(University Federal of the Santa Catarina); One of the most cited physical characteristics responsible for the pathological manifestations, especially displacements, in ceramic coating systems, refers to the hygroscopic movement of the plates. The cycle of burning of the plates is a preponderant factor in the hygroscopic movement, as it interferes directly in the expansion by moisture (EPU) and water absorption. In the present article, the tensile strength of ceramic plates with variations of EPU and water absorption are analyzed, both characteristics that are related to the cycle and the final firing temperature of the plate, using the simple and double bond in the process of settlement. The ceramic plates were obtained before the burning process, with dimensions of 78x78x6mm, which were later enameled and burned at different temperatures, in order to achieve different moisture expansion values and water absorption. In the burning process, 80 samples were used, 40 of which were burned at a maximum temperature of 1080 ° C and the others at a maximum temperature of 1140 ° C. Plates burnt at 1080C showed a water absorption of approximately 10.0% and EPU of 0.62 mm / m, while the plates burned at 1140ºC showed absorption of 1.5% and EPU of 0.12%. After that, the ceramic plates were laid on the standard substrates, according to the specifications of ABNT NBR 14081-2: 2012, by simple and double bonding. The adhesive mortar used in this study was the industrialized adhesive mortar type ACII, according to ABNT NBR 14081-1: 2012 classification and the tensile strength test by ABNT NBR 14081-4: 2012. Based on the final results, it was verified that in the bonding method, the plaques that presented EPU and lower water absorption, higher firing temperature, in the double bond presented an increase in resistance of 34.43% in relation to simple collage and for the plates with expansion by humidity and high absorption, the values obtained did not present statistical difference.
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