Title page for ETD etd-04082009-040600


Type of Document Master's Thesis
Author Lee, Jeffrey Allen
URN etd-04082009-040600
Title Nondestructive evaluation of reinforced concrete via infrared thermography :a feasibility study
Degree Master of Science
Department Engineering Mechanics
Advisory Committee
Advisor Name Title
No Advisors Found
Keywords
  • Reinforced concrete
Date of Defense 1990-06-20
Availability restricted
Abstract

An experimental investigation was conducted to develop a laboratory technique for the nondestructive evaluation of reinforced concrete. The methodologies were developed with the intent of eventual field implementation to determine the feasibility of utilizing infrared thermography to inspect substructural elements of concrete bridges.

Several specimen configurations were fabricated for thermographic inspection. A number of tests were performed on a variety of concrete specimens to determine the implementation parameters of the technique. The necessity of utilizing artificial heating methods for thermal input prior to inspection was evaluated.

The present study suggests that infrared thermography cannot be applied to substructural elements of bridges in a noncontact fashion. Internal thermal gradients produced by diurnal temperature fluctuation generally are not sufficient to produce the variations in surface temperature patterns necessary for thermographically detecting nonvisual subsurface defects. Rather, both the envelopment and artificial heating of the substructural element is required prior to thermographic inspection.

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