Development of Hand-Held Thermographic Inspection Technologies

Subsurface deterioration in concrete structures presents a significant challenge for inspection and maintenance engineers. Cracking, delaminations and spalling that can occur as a result of corrosion of embedded reinforcing steel can lead to potholes and even punch-through in concrete decks. For overpass bridges, concrete can separate from the structure and fall into traffic below the bridge, and there have been numerous deadly accidents as a result. Although this deterioration can frequently be detected using hammer sounding and/or chain dragging, these inspection techniques require hands-on access to the surface of the concrete. For both overpass bridges and decks, lane closures are required to gain access to the structure, and the resulting traffic disruptions make inspections expensive and logistically difficult. The proposed research would explore the use of hand-held infrared cameras for the remote detection of deterioration in concrete. This technology could reduce the need for lane closures and improve the ability of inspection and maintenance personnel to detect and monitor deterioration in its embryonic stages, such that maintenance procedures can be employed before deterioration becomes critical. The technology can also be used to monitor and improve concrete repairs by rapidly identifying the extent of deterioration and locating its boundaries.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 119p

Subject/Index Terms

Filing Info

  • Accession Number: 01140460
  • Record Type: Publication
  • Report/Paper Numbers: NUTC R198, Report No. 00014073, OR10-007
  • Contract Numbers: DTRT06-G-0014 (Grant); RI06-038
  • Created Date: Sep 21 2009 1:35PM