Análisis de la tensión de adherencia del hormigón con el acero de refuerzo en diferentes estados de oxidación y diferentes tratamientos de pasivación y protección

Abstract

Reinforced concrete is one of the busiest construction materials in the world, its operation is based on the adhesion between concrete-steel, in this way it allows the steel to take the tensile forces, maintain the union between the two materials, taking into account the adhesion capacity it carries and the susceptibility of factors such as corrosion processes, the types of rebar of the steel rods and the passivation products, which can positively or negatively affect the adhesion capacity between these two materials. The study was developed using an experimental model based on the “pull out” test, which allows to measure the variations in tensile stress due to potential changes induced in the adherence between these two materials. In this way, the “pull out” tests were proposed with different configurations to carry out the study and thus obtain knowledge about the behavior of adherence in the construction field. Specimens were made with different oxidation configurations of the rod, the type of rebar of the steel and the passivating agent. By means of the hydraulic press of the soil laboratory, "pull out" tests were carried out and the load-displacement results were obtained, with which the adhesion stress was calculated and thus, the influence of the different factors could be statistically analyzed that were raised in the study.