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CAIRNS, John. Consequences of reinforcement corrosion for residual strength of deteriorating concrete structures. In: CONGRESSO INTERNACIONAL SOBRE O COMPORTAMENTO DE ESTRUTURAS DANIFICADAS, 2., 2000, Rio de Janeiro. Anais... Rio de Janeiro, 2000.
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Abstract

The degree to which performance of reinforced concrete is impaired as a result of reinforcement corrosion is a matter of great concern to those responsible for assessment and maintenance of affected structures. While much effort has been devoted to understanding the causes and mechanisms of deterioration and to questions of durability, the problem of assessing the integrity of a corroded structure has received relatively little attention. Information on the effect of corrosion on structural integrity is essential for the development of effective tools for the prediction of residual service life and for development of cost-effective repair strategies. The paper reviews the various ways in which corrosion of reinforcement may affect integrity of structural concrete, and assesses the significance of each. Earlier models of the deterioration process, often proposed by materials scientists, focus on damage. Models which focus on residual strength would be of greater value to the engineer charged with maintaining safe operation of a structure, however. Illustrative examples of the residual strength function for various deterioration factors are presented, and areas of research needs identified.
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