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Concrete delamination caused by steel reinforcement corrosion

Concrete delamination caused by steel reinforcement corrosion

Li, Chun-Qing, Zheng, J.J., Lawanwisut, Wimon and Melchers, Robert E. (2007) Concrete delamination caused by steel reinforcement corrosion. Journal of Materials in Civil Engineering, 19 (7). pp. 591-600. ISSN 0899-1561 (doi:https://doi.org/10.1061/(ASCE)0899-1561(2007)19:7(591))

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Abstract

Practical experience and laboratory observations indicate that corrosion affected reinforced concrete structures are prone more to cracking and delamination of the concrete than to the loss of structural strength. A review of research literature suggests that insufficient
theoretical work on corrosion induced concrete delamination has been undertaken. This paper proposes a theoretical method to predict the time to concrete delamination caused by steel reinforcement corrosion. The method is based on fracture mechanics and uses crack opening
in concrete as the criterion for its delamination. An analytical model is derived to determine the crack width in concrete. A numerical example is given to illustrate the proposed method and a comparison with both test results and an empirical model indicates a good agreement. It is found in the paper that the corrosion rate is the most significant single factor that affects the time to concrete delamination. The proposed method can be used for the prediction of time to concrete delamination for reinforced concrete structures located in chloride-laden environments. In principle, this provides a means for judging timely intervention and as such has the potential to prolong
the service life of corrosion affected concrete structures

Item Type: Article
Uncontrolled Keywords: empirical model, steel reinforcement corrosion
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Pre-2014 Departments: School of Engineering
School of Engineering > Department of Civil Engineering
Related URLs:
Last Modified: 07 Oct 2019 14:29
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/2958

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