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Materials 2015, 8(7), 4316-4331; doi:10.3390/ma8074316

Polarization Induced Deterioration of Reinforced Concrete with CFRP Anode

1
Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, School of Civil Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China
2
Department of Civil and Environmental Engineering, Chalmers University of Technology, Gothenburg SE-412 96, Sweden
*
Authors to whom correspondence should be addressed.
Academic Editor: Federico Bella
Received: 7 May 2015 / Revised: 4 June 2015 / Accepted: 26 June 2015 / Published: 15 July 2015
(This article belongs to the Section Structure Analysis and Characterization)
View Full-Text   |   Download PDF [856 KB, uploaded 15 July 2015]   |  

Abstract

This paper investigates the deterioration of reinforced concrete with carbon fiber reinforced polymer (CFRP) anode after polarization. The steel in the concrete was first subjected to accelerated corrosion to various extents. Then, a polarization test was performed with the external attached CFRP as the anode and the steel reinforcement as the cathode. Carbon fiber reinforced mortar and conductive carbon paste as contact materials were used to adhere the CFRP anode to the concrete. Two current densities of 1244 and 2488 mA/m2, corresponding to the steel reinforcements were applied for 25 days. Electrochemical parameters were monitored during the test period. The deterioration mechanism that occurred at the CFRP/contact material interface was investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The increase of feeding voltage and the failure of bonding was observed during polarization process, which might have resulted from the deterioration of the interface between the contact material and CFRP. The formation and accumulation of NaCl crystals at the contact material/CFRP interface were inferred to be the main causes of the failure at the interface. View Full-Text
Keywords: polarization; interface deterioration; reinforced concrete; CFRP anode polarization; interface deterioration; reinforced concrete; CFRP anode
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. (CC BY 4.0).

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MDPI and ACS Style

Zhu, J.-H.; Wei, L.; Zhu, M.; Sun, H.; Tang, L.; Xing, F. Polarization Induced Deterioration of Reinforced Concrete with CFRP Anode. Materials 2015, 8, 4316-4331.

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