Proposal of Corrosion Rate Analytical Model of Reinforced Concrete with Crack
Abstract
The initiation stage can be estimated by analyzing the penetration of chloride ions in concrete. In addition, it is necessary to predict the corrosion rate after the propagation stage. On the basis of this background, in this paper, a basic model that estimates a steel corrosion rate in reinforced concrete with a crack is proposed. Therefore, first, a model that can calculate the microcell and macrocell corrosion rates is constructed. The input data of this model are the anodic polarization curve, cathodic polarization curve, polarization resistance, and electrical resistivity of concrete. This model is further verified using a mortar specimen and a concrete specimen. The experimental parameters are the watercement ratio, crack width, and humidity. Consequently, it can be confirmed that the analyzed and measured values are equal. Moreover, the engineering value of this model is confirmed. Based on the above results, the following conclusions can be drawn: 1) a model that can be used for analyzing the steel corrosion rate of the reinforced concrete with the crack is proposed. 2) By carrying out the experiment using the mortar specimen and the concrete specimen with a crack, we can confirm the validity of the model. 3) The influences of the water-cement ratio, crack, and humidity on the steel corrosion rate can be confirmed by using this model.
Keywords
Corrosion Rate Electrical Resistivity Polarization Curve Reinforced Concrete Crack WidthPreview
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