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Pro056

Development of an engineering approach for modelling corrosion attack



Author(s): C. Andrade, I. Martinez, N. Rebolledo, A. Castillo
Paper category: Workshop
Book title: International RILEM Workshop on Integral Service Life Modelling of Concrete Structures
Editor(s): R.M. Ferreira, J. Gulikers, C. Andrade
Print ISBN: 978-2-35158-058-5
e-ISBN: 978-2-35158-090-5
Publisher: RILEM Publications SARL
Pages: 299 - 306
Total Pages: 8
Language: English


Abstract: 
Modelling of the period of corrosion propagation is now attracting more interest due to the need to predict the structural performance of existing structures over time. This period is considered to start from the moment the steel presents the first corrosion spots resulting from penetration of chlorides or the arrival of the carbonation front to the reinforcement’s surface. The corrosion then develops with a corrosion rate that depends on the chloride and the moisture content of the concrete and the temperature. This propagation period can be modelled in different manners the most common being that by approaching the process from a practical point of view. As a first step it is necessary to calculate the accumulated corrosion attack, by taking into account the evolution of the corrosion rate with time. In this manner a representative averaged corrosion rate is calculated that multiplied by the number of years gives the accumulated corrosion. The resulting penetration of attack can be transformed in a degree of deterioration with respect to cracks in the cover or the loss in load-bearing capacity. In the present paper, the modelling of the corrosion period is performed in two different conditions: atmospherically exposed and submerged structures.


Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00