¬Analysis of the behavior of the coating mortar with use of feldspato powder in partial replacement to the kid aggregate

Mortar coatings, whether on an internal or external surface, are of great importance for the longevity of the work because they are directly exposed to adverse situations, such as: rainfall, temperature variation, trepidation, soil movement, among others, and must resist all without cracks and cracks, which can lead to infiltrations causing their performance to be compromised. In view of the above, we seek new mixtures and materials that improve the properties of the mortar coating and that may restrain future pathological manifestations. From this problem, this work investigates the influence of the use of feldspar powder in the mixture in substitution to the kid's aggregate (sand), using additive to establish the water / cement factor with the substitution levels of 0%, 10%, 20 % and 30%. For this, the following tests were carried out: Traction Resistance in Axial Flexion, Tensile Strength by Diametral Compression, Capillarity Water Absorption, Capillary Coefficient, Elasticity Modulus, Microstructure and Scanning Electron Microscopy (SEM). From the results obtained in the tests, it was possible to observe an increase in the tensile strengths in the axial flexion and the traction by diametral compression, besides an increase in the modulus of elasticity and a reduction of the water absorption by capillarity, thus improving the characteristics of the mortar and increasing the useful life of buildings.