Protection and Strengthening of Corroded Prestressing Tendons

• Published in: Journal of physics. Conference series Vol. 1950; no. 1; pp. 12076 - 12088
• Main Authors: Sharma, Kaushal, Hooda, Yaman, Kuhar, Preeti, Verma, Neeraj Kumar
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.08.2021
• Subjects: Active Protection; Anodes; Anodic protection; Carbon fiber reinforced plastics; Cathodes; Cathodic protection; CFRP; Concrete blocks; Concrete structures; Corrosion; Corrosion rate; Fiber reinforced polymers; Prestressing; RC Structure; Reinforcing steels; Tendons
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1950/1/012076

Abstract As of late, structural deterioration of RC structures affected by corrosion is widely reported. A new evolution in maintenance of RC structures is by cathodic protection by the use of carbon fiber reinforced polymers (CFRP). Using steel bar as a cathode and wrapping of CFRP as anode, which prevents removal of concrete cover and blocks further corrosion of steel. This article presents the utilization of CFRP for the protection of the strand. Series of laboratory trials using cathodic protection systems were performed on pre-stressed concrete structures in order to set up reliable cathodic protection systems. To initiate initial corrosion in the specimens, pre-stressing tendon used as the cathode and CFRP used as the anode while the in the active protection, the impressed charge was passed through the strand. Then, CFRP sheets were bonded by using conductive adhesive to the block samples. Extensively corrosive environment was imposed on the samples for the particular period of time and it was observed that the active protection method is very effectual in slowing down the corrosion of the strand.