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Physical characterization of reinforcing bar corrosion in concrete

Llano, L, Rafiq, MI and Chryssanthopoulos, MK (2012) Physical characterization of reinforcing bar corrosion in concrete

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Chloride induced corrosion, caused primarily by de-icing salts and/or salt spray from marine environments, is one of the most common deterioration processes in reinforced concrete. It often causes a localized loss of section, known as pitting, which can lead to a significant reduction of the structure's service life. In order to predict the impact of this phenomenon on the mechanical properties of the reinforcing bars in concrete a thorough analysis of its characteristics is needed. At present, most of the models found in literature describe uniform corrosion and those that do address localized corrosion focus on a simplified definition of the reduced cross-sectional area of corroded rebars without due attention to actual physical characteristics and spatial variability. This may be attributed to the limitations of current non-automated and largely heuristic methods used in evaluating the corrosion characteristics on the surface of reinforcement. Automation of the evaluation method could allow the creation and development of comprehensive corrosion models which consider both systematic and random features of the deterioration process. In this paper, a preliminary study to characterize geometrically chloride induced corrosion is presented, together with the steps envisaged in order to develop an improved chloride induced corrosion model. © 2012 Taylor & Francis Group.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions : Surrey research (other units)
Authors :
Rafiq, MI
Date : 2012
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:31
Last Modified : 23 Jan 2020 17:53

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