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Time-Resolved Microwave Thermoreflectometry for Infrastructure Inspection

  • J. W. M. Spicer
  • R. Osiander
  • Y. Chang
  • R. Hildebrand

Abstract

This paper describes the development of time-resolved microwave thermoreflectometry (TRMT) as a potential NDE technique for the detection of corrosion of reinforcing bar (rebar) in concrete structures. The approach in this technique is as follows:
  • rebar inside a concrete structure is heated in a noncontacting fashion using an induction heating source

  • the temperature of the surface of the rebar is monitored directly through the concrete using a microwave reflectometer

  • degradation of the structural integrity of the bond between the concrete and the rebar affects heat flow from the heated rebar to the surrounding concrete.

Keywords

Bridge Deck Heated Length Concrete Bridge Deck Surrounding Concrete Microwave Reflectivity 
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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References

  1. 1.
    D. K. Sharma, “Perspective of Nondestructive Evaluation for the Transportation Enterprise,” in Nondestructive Evaluation of Aging Bridges and Highways, Steve Chase, Editor, Proc. SPIE 2456, 28–38 (1995).Google Scholar
  2. 2.
    C.R. Carter, et al., “Impulse Radar Evaluation of Reinforced Concrete Bridge Decks,” in Nondestructive Evaluation of Aging Bridges and Highways, Steve Chase, Editor, Proc. SPIE 2456, 174–185 (1995).Google Scholar
  3. 3.
    N.K. Del Grande and P.F. Durbin, “Using Emissivity-Corrected Thermal Maps to Locate Deep Structural Defects in Concrete Bridge Decks,” in Nondestructive Evaluation of Aging Bridges and Highways, Steve Chase, Editor, Proc. SPIE 2456, 250–261 (1995).Google Scholar

Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • J. W. M. Spicer
    • 1
  • R. Osiander
    • 1
  • Y. Chang
    • 1
  • R. Hildebrand
    • 1
  1. 1.Applied Physics LaboratoryJohns Hopkins UniversityLaurelUSA

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