The use of infrared thermography to define very accurately variations in surface temperatures was evaluated as a means of defining delaminated areas caused by corrosion of reinforcing steel in concrete bridge decks. Differences in the temperatures of the deck surface, shown in various shades or colors on a cathode-ray tube, were photographed to provide a permanent graphic record of the location of the warmer, distressed areas. In a comparative study of infrared thermography and conventional deck evaluation techniques, including the sounding of the surface with a hammer and chain drag and the use of a rolling delamination detector, all were found generally satisfactory in locating severe to medium delaminations. However, the infrared thermography procedure had important advantages in disclosing incipient delaminations, those in which the cracking is confined to the close vicinity of the reinforcing steel, and in providing detailed records of the separated areas. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 180-182
  • Monograph Title: Bridge Engineering. Volume 1
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00183762
  • Record Type: Publication
  • ISBN: 0309026962
  • Files: TRIS, TRB
  • Created Date: Dec 3 1978 12:00AM