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Published in:
2020 | OriginalPaper | Chapter
Service Life Modeling in Propagation Phase of Corrosion in Concrete Due to Carbonation
Authors : Yogendra Singh Patel, Lav Singh, Shashank Bishnoi
Published in: Calcined Clays for Sustainable Concrete
Publisher: Springer Singapore
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Abstract
In this paper, a model is presented, which can predict propagation time due to carbonation-induced corrosion. This model is developed using existing models in the literature. Corrosion rate determination is a crucial step in modeling the propagation phase. An assembled model of corrosion rate is presented, which takes into account w/c ratio, relative humidity, temperature, pH, and cement-type effects into it. Corrosion rate model also considers effects coming due to the accumulation of rust products so as these products keep piling, corrosion rate reduces with time. This corrosion rate model shows good agreement with the experimental data, which is available for different scenarios in the literature for the OPC. From this corrosion rate model, a propagation time model is being developed using Faraday’s law and critical mass for cracking model. The propagation time for the LC3-added cement concrete is calculated.