Análise da resistência de aderência à tração de revestimento cerâmico aplicado em parede de concreto moldada in loco com diferentes tipos de tratamento de base: escova e lavagem com água e desbaste mecânico.

Abstract

As Brazil occupies a prominent place in the world scenario of consumption and production of ceramic tiles, it is important to evaluate the quality and performance of the commercial mortars used in the process. The objective of this work was to verify which mortar presented the highest tensile adhesion resistance of the ceramic coating applied to a concrete wall cast in situ with a specific type of adhesive mortar manufacturer using the three types AC-I, AC-II and AC-III . This work is a case study and was carried out on a construction site using an unwashed cast-in-place concrete wall, washed with water and using mechanical grinding. This wall was divided into three parts and 72 ceramics were placed in each part, totaling 216 units of 10cm x 10cm ceramics placed on this wall and each part was used with three types of mortar. This study will be important when choosing the best mortar when laying ceramics on this type of substrate, as the tensile strength values can be determined through the pull-out test (NBR 13754:2016). It was found that the three mortars did not meet the standard regarding untreated walls, with treatment using a steel brush and washing with water. The AC-II and AC-III types of mortar used in the experiment met the NBR 13749 (2013) standard for concrete walls with mechanical grinding treatment. All this observation will be important during the executive process, as it will help in the best choice of the type of treatment applied to the substrate before applying the ceramic coating.