Materiales de Construcción, Vol 63, No 309 (2013)

Durability of reinforced concrete exposed to aggressive conditions


https://doi.org/10.3989/mc.2013.00313

A. M. Aguirre
Universidad del Valle, Colombia

R. Mejía de Gutiérrez
Universidad del Valle, Colombia

Abstract


Reinforced concrete is the most widely used construction material in the world. The combination of high compressive strength, afforded by concrete and, and the excellent mechanical properties that characterise steel make it an ideal composite for all manner of structures. One of the main weaknesses of this material, however, is that when the concrete is exposed to aggressive environments, in particular high concentrations of chloride ions or carbon dioxide, reinforcing steel corrodes, shortening service life. This article reviews the state of the art on concrete durability, along with the conditions that affect its useful life by inducing reinforcing steel corrosion. It also discusses the prevention and control methods, in particular electrochemical prevention and rehabilitation techniques, that have been developed to mitigate the problem.

Keywords


reinforced concrete; steel corrosion; mineral additions; electrochemical rehabilitation

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