Vigas reforçadas com argamassa polimérica e fibras de carbono

Abstract

In this study, the performance of reinforced concrete beams reinforced with polymer mortar and carbon fibers (CRFC), in blanket and laminate forms, was analyzed. The reinforcement of the beams was carried out using two gluing techniques, the first with the carbon fiber blanket applied over the epoxy adhesive, on one of the sides of the pieces, and the second, by applying the blade to a longitudinal cut made in the layer of reinforcement mortar. It is also worth noting that the beams are over ten years old. Therefore, an experimental study is presented involving ten reinforced concrete beams with a quadratic cross section, with average dimensions of 7x7x90cm, in order to evaluate and compare the behavior of the reinforced parts. For this purpose, each of the beams was subjected to progressive loads until structural failure was reached, thus allowing comparative analysis of their performance under different reinforcement conditions. The first beam to be tested was reinforced concrete without any type of reinforcement. Subsequently, the test was carried out with a group that comprised three reference beams, in which only the polymeric mortar was used. Next was the second group, made up of three beams reinforced with polymer mortar and carbon fiber blanket. Finally, the third group was tested, which included three beams reinforced with polymer mortar and carbon fiber laminate. According to the results obtained, it can be seen that the beams reinforced through the incorporation of carbon fibers demonstrate an increase in stiffness, more specifically those reinforced with laminate, in addition, there was corroboration of the technical viability of the reinforcements used in this work, as it demonstrated there was a substantial increase in the load capacity and bending stiffness of the parts under evaluation, which were reinforced with carbon fiber.