Optimization of Electromagnetic Acoustic Transducers (EMATs) for Condition Assessment of Civil Infrastructure

Concrete is a primary construction material for infrastructure in the United States. The ability to effectively assess the condition of concrete structures during their service life is critically important to maintaining the safety and efficiency of our infrastructure. Corrosion of reinforcing steel bars and strands that are embedded in the concrete is a primary deterioration mode for structures across the spectrum of the civil infrastructure. The Electromagnetic Acoustic Transducer (EMAT) technology to be developed under the proposed project can help address the need for improved condition assessment tools, by allowing a concrete structure to be built with an embedded acoustic sensor network. The embedded sensors will be capable of detecting corrosion, cracking in concrete, and fracture of embedded steel such as reinforcing steel and prestressing strand. This technology will lead to a "smart bridge" that has an embedded sensor network that is analogous to the nervous system in the human body, detecting deterioration in its embryonic stages such that mitigation methods can be employed. The goal of the proposed project is to develop improved sensor designs for magnetostrictive EMATs that will overcome limitations in the current sensors designs, allowing for the sensors to be embedded in concrete. The improved design and design models to be developed under this project will broaden the scope of application for this unique sensor technology for the condition assessment of bridges and other civil structures.


  • English


  • Status: Completed
  • Contract Numbers:


  • Sponsor Organizations:

    Research and Innovative Technology Administration

    Department of Transportation
    1200 New Jersey Avneue, SE
    Washington, DC  United States  20590
  • Performing Organizations:

    University of Missouri, Columbia

    Department of Civil Engineering
    Columbia, MO  United States  65211
  • Principal Investigators:

    Washer, Glenn

  • Start Date: 20060901
  • Expected Completion Date: 0
  • Actual Completion Date: 20080228
  • Source Data: RiP Project 14324

Subject/Index Terms

Filing Info

  • Accession Number: 01460290
  • Record Type: Research project
  • Source Agency: Center for Infrastructure Engineering Studies
  • Contract Numbers: DTRS98-G-0021
  • Files: UTC, RiP, USDOT
  • Created Date: Jan 3 2013 1:22PM