The development of advanced nondestructive testing (NDT) methods for structure/infrastructure assessment is important in civil engineering, and has also managerial implications. The cost of maintenance and safety inspections is continuing to grow and presently in use inspection methods, including NDT methods, are often still considered inadequate because they are costly, traffic disrupting, or require skilled personnel. There is a need for quantitative NDT methods that are easy and fast to apply and easy to interpret. At BAM, Federal Institute for Materials Research and Testing, Germany, work has been carried out on Impact Echo (IE) with the above objectives in mind. While traditional IE collects point measurements, the requirement for skilled personnel for interpretation has been a limitation. Instead, the use of scanning IE implements the method by giving complete and detailed objective information. An automated procedure has been developed for data collection to reduce the influence of transducer coupling. Cross sections of the element can be plotted. Laboratory applications on concrete specimens are shown and data collection described for plotting 2-D element sections. These cases include void location in a multi-layer specimen, and duct shape visualization in 0.5 m thick wall. Site examples from railway high speed tracks (railway sleepers) are given.

  • Availability:
  • Supplemental Notes:
    • This entry in the TRIS database is made from the hardback copy of the conference proceedings, which are also available on CD-ROM.
  • Corporate Authors:

    Technomic Publishing Company, Incorporated

    851 New Holland Avenue, Box 3535
    Lancaster, PA  United States  17604
  • Authors:
    • COLLA, C
    • Wiggenhauser, H
  • Conference:
  • Publication Date: 2000


  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 350-355

Subject/Index Terms

Filing Info

  • Accession Number: 00793146
  • Record Type: Publication
  • ISBN: 1566769493
  • Files: TRIS
  • Created Date: May 8 2000 12:00AM