Avaliação da resistência a impactos de corpo-duro em sistemas de piso com revestimento cerâmico de acordo com os critérios de nível de desempenho da ABNT NBR 15575/2013.

Abstract

In 2013, the Brazilian Association of Technical Standards (ABNT) released the second version of the “Performance Standard” ABNT NBR 15575: 2013, which deals with performance in all types of residential buildings, establishing minimum performance criteria that the building must meet. . This standard is divided into six parts. Part 3 deals with performance on flooring systems. The structural safety of these is guaranteed among other factors by the resistance to impact of hard body, theme of this work. This requirement is important because pathological manifestations may occur in the finishing layer. In the case of the ceramic coating finishing layer, fractures, dents and chipping can occur for example due to the low impact resistance of everyday objects of building users. This work is justified due to the need to obtain an ideal mixture to produce the subfloor mortar that will support the finishing layer. Thus, the objective is to evaluate the performance of ceramic-coated floor systems in relation to the resistance to hard-body impacts, having subfloors made from two mixtures of mortars. Initially the characterization tests were developed in the mortar constituent materials, in the mortars themselves and also in the ceramic tiles. Prototypes of subfloors were made, with two traces of mortar in volume: 1: 6 (cement and sand) and 1: 0.25: 6 (cement, lime and sand). After the prototype curing time of 7 days, the ceramic coated finishing layer was performed on each prototype. Then, the hard-body impact resistance test was performed on the floor specimens (at nine points distributed in the prototypes). The results obtained for this trial concluded that the floors met the minimum performance level (M).