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Ultrasonic NDT Prototype for the Inspection of Ducted Post Stressing Tendons in Concrete Beams

  • P. J. Duncan
  • P. A. Gaydecki
  • F. M. Burdekin

Abstract

There is worldwide concern about concrete bridges which derive their strength from post stressed steel tendons in grouted ducts. Problems arise when grouting has not been carried out properly, since the combination of voided regions and moisture penetration can cause corrosion of the tendon and catastrophic failure of the structure [1]. Post tensioned bridges built during the middle of this century are particularly susceptible and there is a pressing need for a cost effective non destructive means of assessing the condition of the embedded ducts and tendons. In response to this problem, a track mounted ultrasonic scanning system ‘CANDI’ (Cable Analysis by Non Destructive Inspection) is currently under development in UMIST, and this work describes the CANDI prototype and results obtained.

Keywords

Bridge Deck Test Beam Concrete Bridge Bridge Beam Moisture Penetration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • P. J. Duncan
    • 1
  • P. A. Gaydecki
    • 1
  • F. M. Burdekin
    • 2
  1. 1.Department of Instrumentation and Analytical ScienceUniversity of Manchester Institute of Science and TechnologyManchesterEngland
  2. 2.Department of Civil and Structural EngineeringUniversity of Manchester Institute of Science and TechnologyUK

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