Prediction of the penetrated rust into the microcracks of concrete caused by reinforcement corrosion

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Abstract

Consider a steel-rust-concrete composite consisting of a circular cylindrical concrete cover and a coaxial uniformly corroding steel reinforcement. Prediction of the amount of rust penetrated into the microcracks of concrete cover from a set of data measured at the surface of the concrete is of particular interest. The steel is assumed to be linear isotropic and rust follows a power law stress-strain relation. For the concrete, anisotropic behavior and post-cracking softening model is employed. The formulations lead to a nonlinear boundary value problem which is solved analytically. A key parameter β, defined as the ratio of the volume of corrosion products inside the cracks to the volume of the cracks, is calculated. With some efforts, this parameter is also extracted from the available theoretical and experimental studies for the purpose of comparison. The effects of the mechanical properties of rust and concrete on β is addressed. © 2010 Elsevier Inc.

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Kiani, K., & Shodja, H. M. (2011). Prediction of the penetrated rust into the microcracks of concrete caused by reinforcement corrosion. Applied Mathematical Modelling, 35(5), 2529–2543. https://doi.org/10.1016/j.apm.2010.11.039

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