Evaluación de la vida útil de estructuras de concreto reforzado, a través de la difusión de cloruros, utilizando la simplificación de modelo matemático

Abstract

Abstract:The present research analyzes the behavior of concrete of a building located in Bahía de Caráquez-Manabí with respect to its exposure to chlorides. As common after catastrophes, like the 16a-Pedernales earthquake, many questions rise about the validity of construction processes in this area. One theory refers to the lack of protection against corrosion in this coastal environment, where different pollutants can affect the concrete reinforcement steel. The main objective of this research is to determine and quantify the durability of this building, using a simplified mathematical model. Therefore, 2 core samples were placed in a NaCl solution for different exposure times, as indicated in ASTM C1556, Standard Test Method for Determining the Apparent Chloride Diffusion Coefficient of Cementitious Mixtures by Bulk Diffusion. Then, the soluble chlorides were tested in acid to generate concentration profiles, which are necessary to calibrate the graphs and obtain the diffusion coefficients required for the calculation.