A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Underwater Fiber-Reinforced Polymer Repair of Corroding Piles Incorporating Cathodic Protection
This project developed a new fiber reinforced polymer (FRP) repair system incorporating a sacrificial cathodic protection (CP) system inside a FRP wrap. The FRP-CP system is versatile and can be used for repairing concrete columns or piles in seismic or non-seismic regions, on dry land or partially submerged in salt water. The system was implemented for repairing piles in estuarine waters and its effectiveness over the duration of the project proven. The project was carried out in two separate stages. In the first stage, pressure/vacuum bagging technologies commonly used by the composite industry for bonding composite elements were refined to develop a new system suitable for infrastructure applications. This new system assured good bond between concrete and FRP, irrespective of the wetness or dryness of the concrete surface; tests showed that compared to controls, pressure bagging improved bond by over 70% and vacuum bagging by over 30%. In the second stage, the new FRP-CP repair system was used in a demonstration project in which four corroding piles supporting the Friendship Trail Bridge, Tampa Bay were repaired. Pressure bagging was used to apply the FRP wrap following installation of the CP system. The performance of the FRP-CP system was monitored for 12 months. Results show that it is functioning as designed in protecting steel from corroding further. However, the consumption rate of the zinc anodes is higher than assumed in the design. Additional Phase II investigations are proposed that can further simplify and improve the prototype developed in this project.
Underwater Fiber-Reinforced Polymer Repair of Corroding Piles Incorporating Cathodic Protection
This project developed a new fiber reinforced polymer (FRP) repair system incorporating a sacrificial cathodic protection (CP) system inside a FRP wrap. The FRP-CP system is versatile and can be used for repairing concrete columns or piles in seismic or non-seismic regions, on dry land or partially submerged in salt water. The system was implemented for repairing piles in estuarine waters and its effectiveness over the duration of the project proven. The project was carried out in two separate stages. In the first stage, pressure/vacuum bagging technologies commonly used by the composite industry for bonding composite elements were refined to develop a new system suitable for infrastructure applications. This new system assured good bond between concrete and FRP, irrespective of the wetness or dryness of the concrete surface; tests showed that compared to controls, pressure bagging improved bond by over 70% and vacuum bagging by over 30%. In the second stage, the new FRP-CP repair system was used in a demonstration project in which four corroding piles supporting the Friendship Trail Bridge, Tampa Bay were repaired. Pressure bagging was used to apply the FRP wrap following installation of the CP system. The performance of the FRP-CP system was monitored for 12 months. Results show that it is functioning as designed in protecting steel from corroding further. However, the consumption rate of the zinc anodes is higher than assumed in the design. Additional Phase II investigations are proposed that can further simplify and improve the prototype developed in this project.
Underwater Fiber-Reinforced Polymer Repair of Corroding Piles Incorporating Cathodic Protection
R. Sen (author) / G. Mullins (author)
2010
30 pages
Report
No indication
English
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