Investigation of Corrosion and Other Deterioration Effects in Highway Bridge Components Using Nondestructive Testing Technology of Acoustic Emission

Virginia Department of Transportation (VDOT) carries out periodical evaluation of the damages and deterioration in aging highway bridges and performs maintenance, rehabilitation and repair (MR&R) to prolong their useful life. The process of identifying the deterioration, locating the defects and identifying the means of preventing further damages is time consuming and in most cases the process is subjective in nature. There are possibilities of human error in assessing the status of such damages. Better methods of testing the bridges are needed to perform these operations efficiently and effectively. In-service diagnostic methods for the evaluation of corrosion steel-reinforced concrete structures are useful to reduce the maintenance costs and to ensure safety. Acoustic Emission (AE) monitoring is one of the most promising methods to monitor the deterioration of the structure. There are several nondestructive testing (NDT) methods to complement AE monitoring. It is essential to support the results of AE tests, using other techniques too, to improve the reliability of test results. Resistivity measurement on the surface of concrete is identified as one of the useful methods to improve the reliability of testing for corrosion. This research effort focused on testing Highway Bridge in the Denbigh Boulevard, crossing Interstate-64, for studies of corrosion related damages in the concrete columns, using AE method. With a permanent installation of AE monitoring facility the integrity of the structural members can be monitored continuously, as the damages take place, thereby maintenance work can be carried out in time. In addition to AE method, resistivity measurements in the columns were carried out to evaluate the usefulness of such tests.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Photos; References;
  • Pagination: 19p

Subject/Index Terms

Filing Info

  • Accession Number: 01520702
  • Record Type: Publication
  • Contract Numbers: DTRT06-G-0029
  • Files: UTC, TRIS, RITA, ATRI, USDOT
  • Created Date: Mar 29 2014 4:01PM