Effect of impressed anodic current density applied to accelerated corrosion on laboratory results

Author(s): I. Saether, R. Antonsen, Ø Vennesland
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: 307 - 314
Total Pages: 8
Language: English

Abstract: 
Accelerated corrosion by means of the impressed anodic current technique is effective in inducing corrosion of steel reinforcement in concrete in the laboratory and thus is widely used in concrete durability tests. An attempt to analyse the effect of different current densities on the bond strength and the residual load-bearing capacity of the concrete specimens with corroded reinforcement was performed. Comparison of available results from different pullout and beam tests presents a considerable scatter in the measured bond strengths and the residual load capacity. The summary of pullout tests of specimens without transverse reinforcement with relatively low current densities showed an identical tendency of the reduction of the bond strength for corrosion degrees up to 9 % weight loss. Relative large scatter in the bond strengths measured in pullout tests corresponding to relatively high current densities was demonstrated. No significant effect of different current densities on the residual load-bearing capacity of corroded beams with and without transverse reinforcement for low corrosion degrees 2-3 % was registered but the difference in the experimental results for relative higher corrosion degrees is considerably large.

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