Upgrading Capacity and Protecting Concrete Columns Against Corrosion

Corrosion is a critical phenomenon that occurs to metallic. In reinforced concrete structures corrosion occurs due to chloride (namely, chloride-induced corrosion) or carbonation (namely, carbonation-induced corrosion). Carbonation of concrete [4] occurs due to chemical reaction between Calcium hydroxide (Ca(OH)2) in cement matrix and carbon dioxide (CO2) from atmosphere that chemical reaction results in formation of calcium carbonate (CaCO3) which fills the pores. In addition, pore water pH drops to below 9.0 leading to disturbance to the passive layers which lead to initiation of corrosion if sufficient oxygen and water are present around the reinforcement. Due to corrosion, the interface between concrete and reinforcement experiences growth of expandable corrosion products that cracking of concrete that may hamper the serviceability of structures. In the United States, the annual direct cost of corrosion in highway bridges alone is roughly $8.3 billion, including maintenance, repair, replacement, and the cost of capital. This project aims to upgrade the capacity of existing concrete bridges and protect concrete bridge columns against both chloride-induced corrosion and carbonation-induced corrosion. The proposed technique utilizes a full wrapping of bridge columns (circular and square) with full encasement of ultra high performance concrete (UHPC) which includes longitudinal reinforcements. In addition to upgrading capacity and protection against corrosion, the proposed technique will enhance the column resistance against impact loading (e.g. vehicle collision).

• Record URL:
  https://abc-utc.fiu.edu/research-projects/upgrading-capacity-and-protecting-concrete-columns-against-corrosion/

Language

• English

Project

• Status: Active
• Funding: $180000
• Contract Numbers:

  69A3551747121

• Sponsor Organizations:

  Accelerated Bridge Construction University Transportation Center (ABC-UTC)

  Florida International University
  10555 W. Flagler Street
  Miami, FL  United States  33174

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Performing Organizations:

  Florida International University

  Civil and Environmental Engineering
  10555 W. Flagler Street, EC 3680
  Miami, FL  United States  33174
• Principal Investigators:

  Azizinamini, Atorod

• Start Date: 20230515
• Expected Completion Date: 0
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Columns; Concrete bridges; Corrosion protection; Ultra high performance concrete
• Subject Areas: Bridges and other structures; Construction; Design; Highways; Materials;

Filing Info

• Accession Number: 01889306
• Record Type: Research project
• Source Agency: Accelerated Bridge Construction University Transportation Center (ABC-UTC)
• Contract Numbers: 69A3551747121
• Files: UTC, RIP
• Created Date: Jul 30 2023 9:15PM