Impact-echo is a nondestructive test method for the evaluation of concrete and masonry structures. When used correctly, the method has achieved unparalled success in locating many types of flaws and defects. Its use has resulted in the saving of millions of dollars in repair and retrofit costs on bridges, retaining walls, and other structures. New applications for impact-echo are constantly evolving. This article presents a practical application of the impact-echo method to locate voids under concrete slabs. After presenting basic theory, a case study follows to demonstrate the field use of impact-echo for this application.


  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 23-27
  • Serial:
    • Concrete International
    • Volume: 21
    • Issue Number: 5
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 00765472
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 2 1999 12:00AM