Modeling and Measurement of Rebar Corrosion on Crack Formation Using High Frequency Ultrasonics in Three Dimensions and with No Contact with The Sample

The goal of this project is to demonstrate the ability to detect early appearance of cracks in reinforced concrete due to rebar corrosion, using ultrasonic nondestructive acoustic testing with no direct contact between the sensor and the concrete block, in conjunction with a poro-elastic ultrasound propagation model. The objectives are threefold: (1) Identify the proper measurement configuration and predict the performance, using the modeling of the ultrasound propagation in the reinforced concrete; (2) Perform a series of targeted measurements using the proper ultrasonic transducers on a set of existing reinforced concrete samples placed in partial or complete immersion; (3) Evaluate the degree of corrosion within the reinforced concrete with confidence levels according to the poro-elastic model, and correlate the results with those obtained (separately from this proposal) using traditional non-invasive techniques (e.g. corrosion current and corrosion potential measurements). The proposed poro-elastic model ties the physical properties of the porous medium (such as porosity, mean grain diameter, mass density, bulk modulus, shear modulus) to the sound propagation through the porous medium. It can also handle gradual changes of the physical characteristics of the medium and produce a synthetic response to a broadband acoustic impulse. This technique is very relevant in the material observed around the corroding bar. This research would be the foundation for a more detailed acoustic analysis of rebar corrosion detection in reinforced concrete pilings/columns out in the field.

• Record URL:
  https://tridurle.wsu.edu/rebar-corrosion-on-crack-formation/

Language

• English

Project

• Status: Completed
• Funding: $99682
• Contract Numbers:

  ORSO 135461

• Sponsor Organizations:

  Transportation Infrastructure Durability & Life Extension

  Washington State University
  Department of Civil & Environmental Engineering
  Pulman, Washington  United States  99163

  Office of the Assistant Secretary for Research and Technology

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

  Transportation Infrastructure Durability & Life Extension

  Washington State University
  Civil & Environmental Engineering
  Pullman, Washington  United States  99164
• Project Managers:

  Kline, Robin

• Performing Organizations:

  Florida Atlantic University Dept. of Ocean & Mechanical engineering

  101 North Beach Road
  Dania Beach, Florida  United States  33004
• Principal Investigators:

  Beaujean, Pierre-Philippe

• Start Date: 20200501
• Expected Completion Date: 20220130
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Corrosion; Cracking; Nondestructive tests; Reinforced concrete; Reinforcing bars; Ultrasonic tests
• Subject Areas: Maintenance and Preservation; Materials; Transportation (General);

Filing Info

• Accession Number: 01754174
• Record Type: Research project
• Source Agency: National Center for Transportation Infrastructure Durability and Life-Extension
• Contract Numbers: ORSO 135461
• Files: UTC, RIP
• Created Date: Oct 5 2020 1:52PM