Corrosion Risk Assessment of Unbonded Post Tensioned Tendons Filled with flexible Filler That Have Voids With and Without Solutions

Based on the corrosion found on steel strands of an in-service bridge it is evident that voids within the flexible filler can result in corrosion initiation. This research will evaluate the effect of void size and the effects of the content of the void on corrosion initiation and corrosion rate. The research will look into determining if there is a minimum size a void must be before corrosion becomes a concern. Thresholds will also be determined for the humidity level of air-filled voids and the resistivity and chloride level of solution filled voids for when corrosion becomes a concern. Experiments will be conducted to determine if moist air in voids surrounding flexible-filler coated steel strands can cause corrosion (via high humidity exposure). Experiments will be performed to determine if water or a chloride containing solution (in voids) surrounding the coated steel strand (flexible filler) can cause corrosion and to determine the corrosion extent over time.

Language

• English

Project

• Status: Active
• Funding: $187999
• Contract Numbers:

  BED27 977-03

• Sponsor Organizations:

  Florida Department of Transportation

  Research Center
  605 Suwannee Street MS-30
  Tallahassee, FL  United States  32399-0450
• Managing Organizations:

  Florida Department of Transportation

  Research Center
  605 Suwannee Street MS-30
  Tallahassee, FL  United States  32399-0450
• Project Managers:

  Simmons, Ronald

• Performing Organizations:

  Florida Atlantic University, Boca Raton

  Boca Raton, FL  United States  33431
• Principal Investigators:

  Presuel-Moreno, Francisco

• Start Date: 20240305
• Expected Completion Date: 20260731
• Actual Completion Date: 0
• USDOT Program: Advanced Materials/Structural Safety

Subject/Index Terms

• TRT Terms: Air voids; Corrosion; Fillers (Materials); Risk assessment; Tendons (Materials)
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 01920466
• Record Type: Research project
• Source Agency: Florida Department of Transportation
• Contract Numbers: BED27 977-03
• Files: RIP, STATEDOT
• Created Date: Jun 3 2024 2:52PM