Análise do desempenho de sistemas de revestimento através do uso de diferentes formas de aplicação em substrato cerâmico e de concreto

Abstract

The advancement of materials technology and the new techniques that are sought in civil construction, make the branch in constant evolution. Due to the increased demand for knowledge about the mortar coating system, there is a need to evaluate new techniques and materials. With the aim of analyzing the performance of different coating systems through the use of different forms of application and substrates, this research will use two different substrates, each with three forms of roughcast application (manual, semi-manual and mechanized) and others. two forms of coating application (manual and mechanized). The bases tested were ceramic and concrete. The roughcast to be used is of the conventional type with a 1:3 ratio (in mass), in addition, the coating used was with a machined mortar stabilized and usinated for 36 hours. The tests on the mortars used were as follows: in the fresh state the consistency index, in the hardened state the compressive strength, the tensile strength in bending, the mass density, the water absorption by capillarity and the capillarity coeficient. Finally, two tests were carried out on the coating systems, resistance to adhesion in traction and monitoring of cracks. Regarding mortar coatings in general, the different systems did not show cracking and only meet the performance when in an indoor environment, due to the resistance of adhesion to traction. The method with manual roughcasting and mechanized coating obtained the best results in terms of resistance to tensile adhesion in view of the homogeneity of application on both substrates, while the semi-manual roughcasting showed inefficiency as a base treatment method. The great variability found in concrete substrate, however, does not allow us to obtain certainties about the results found. [resumo fornecido pelo autor]