This paper provides an appraisal of the available methods for detecting and quantifying corrosion-induced delaminations in steel reinforced concrete. The traditional chain-drag method, which involves dragging a chain on the concrete surface and listening to its acoustic response, is the most commonly used technique. An automated chain-drag system has also been developed that is equipped with a computerized marking system that can store data for future analysis. Other techniques include an electro-mechanical sounding system, rotary-percussion sounding system, impact-echo method, infrared thermography and ground-penetrating radar. The Federal Highway Administration is sponsoring the development of two electromagnetic systems. When choosing a suitable technique for a specific application, technicians should consider simplicity, efficiency and economy. Minimizing inconvenience to the users of the structure during the inspection process is also an important consideration.


  • English

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 73-78
  • Serial:
    • Concrete International
    • Volume: 25
    • Issue Number: 7
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 00960752
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 7 2003 12:00AM