Table of Contents
ISRN Corrosion
Volume 2012, Article ID 814923, 9 pages
http://dx.doi.org/10.5402/2012/814923
Research Article

The Performance of Carbon Fibre Composites as ICCP Anodes for Reinforced Concrete Structures

1Centre for Infrastructure Management, Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UK
2C-Probe Systems Ltd., Blackmoss Court, Blackmoss Road, Dunham Massey, Cheshire WA145RG, UK

Received 31 October 2012; Accepted 19 November 2012

Academic Editors: N. Boshkov, E. D'Elia, and C. Valentini

Copyright © 2012 Chinh Van Nguyen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cathodic protection has been proven to be one of the most widely applicable and cost-effective solutions for tackling steel corrosion in reinforced concrete. In this study, the possible use of carbon fibre composites, which are primarily used to strengthen concrete members, has been investigated as impressed current cathodic protection anodes. Carbon fibre anodes have been assessed in both concrete and calcium hydroxide solution. Two bonding mediums incorporating epoxy and geopolymer have also been investigated. The results demonstrate that epoxy resin can be used for bonding carbon fibre fabric anodes to reinforced concrete structures while geopolymer is more effective for bonding carbon fibre reinforced polymer (CFRP) rod into preformed grooves in the concrete surface. The dissolution of carbon fibre anode appears to stablise after a period of time, dependent upon the size and shape of the anode and applied voltage and current. Based on the present results, a maximum current density of 128 mA/m2 of reinforcing steel area is recommended for the operation of CFRP fabric anode and 64 mA/m2 of reinforcing steel area for that of CFRP rod anode.