Investigation on CFRP as dual-functional material in chloride-contaminated solutions. (1st October 2017)

• Record Type: Journal Article
• Authors: Zhu, Ji-Hua; Wei, Liangliang; Moahmoud, Hitham; Redaelli, Elena; Xing, Feng; Bertolini, Luca
• Is Part Of: Construction & building materials. Volume 151(2017)
• Page Start: 127
• Page End: 137
• Publication Date: 2017-10-01
• Subjects: A. Polymer -- B. EIS -- B. Polarization -- C. Chlorination -- C. Oxidation -- C. Cathodic protection; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2017.05.213
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Different polarization and [Cl − ] were considered in the accelerated testing of CFRP specimens. CFRP provides excellent electrical conductivity and possesses strong polarization resistance. The degradation of CFRP after anodic polarization was determined by two types of anode electrochemical reactions. The residual tensile strength of CFRP increased with increasing [Cl − ] at an equivalent degree of polarization. CFRP has demonstrated the practical capacity to establish multiple safeguards in an ICCP-SS system. Abstract: This paper investigates the performance of carbon fibre reinforced polymer (CFRP) as a dual function material in combined impressed current cathodic protection and structural strengthening of reinforced concrete structures. Tests in solution showed that CFRP maintain stable electrical conductivity after 80 d accelerated anodic polarization. Results suggest that oxygen evolution occurring at low chloride ion concentration ([Cl − ]) primarily damages the carbon fibre, while chlorine evolution occurring at high [Cl − ] primarily damages the epoxy resin. The tensile strength of CFRP after anodic polarization decreases with increasing circulated charge, and, for a given circulated charge, it increases with increasing [Cl − ].