Effect of silica fume on the initiation of chloride induced corrosion in reinforced concrete

Author(s): M. Manera, Ø Vennesland, L. Bertolini
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: 369 - 378
Total Pages: 10
Language: English

Abstract: 
The chloride threshold values for the initiation of corrosion of steel in concrete show a wide range of variability and one of the reasons for this wide scatter is the number of influencing parameters, such as the steel potential, cement type, curing condition, water/cement ratio, steel surface finishing. In addition, values reported in the literature can be hardly compared among themselves, as they are obtained using different experimental techniques and approaches regarding the evaluation of the state of corrosion, the chloride content measurement and the definition of the critical threshold itself.
The aim of this work is to study the influence of silica fume on the initiation of chloride induced corrosion.
Steel potential, concrete resistivity and linear polarization resistance have been measured in order to evaluate the corrosion conditions of the steel bars and thus detect the chloride content leading to corrosion initiation.

Keywords: Chloride threshold, silica fume, corrosion, reinforced concrete, mixed-in chloride.

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