AVALIAÇÃO DA TENACIDADE DE ARGAMASSAS COLANTES SUBMETIDAS A ESFORÇOS SIMULTÂNEOS DE TRAÇÃO E CISALHAMENTO

Resumo

In Brazil, the most used methodology to evaluate the adhesion of ceramic coatings is the adhesion strength test to direct traction, however, such evaluation may be insufficient to verify the adhesion quality of the coatings to the substrate, since, several researchers consider that the adhesion of the system results not only from the tensile strength, but als from the shear bond strength and the adhesion extension of the mortar. This project aims to contribute to the study and understanding of the influence of the type of adhesive mortar through the analysis of the toughness obtained from the area under the Force x Displacement curve in mixed mode of stresses. The main parameters considered in the test were the type of adhesive mortar used, the size of the contact failure in the adhesion extension between the mortar and the ceramic plate, and the thickness of the adhesive mortar mattress. The experimental results show that, for all analyzed situations, AC III mortar obtained higher toughness results than AC II mortar, confirming the performance of AC III from the point of view of adhesion strength.