Evaluation of gluing of CFRP onto concrete structures by infrared thermography coupled with thermal impedance

Alexis Chauchois, Brachelet Franck, Defer Didier, Antczak Emmanuel, Hangseok Choi

Research output: Contribution to journalArticle

7 Citations (Scopus)


Carbon Fiber Reinforced Polymers (CFRPs) have been increasingly employed for structural strengthening, and are attached to structures using bonding adhesives. The aim of this work is to characterize defects in the bond between CFRP and concrete (after they are located by pulse infrared thermography), and assign the defects a "numerical value" (ranging from 0 for a complete air-gap to 1 for a fully glued bond). Quantitative characterization is performed by measuring the thermal impedance, and then identifying the thermophysical parameters of the system through fitting the measured impedance to a theoretical model. An inversion procedure is carried out to estimate the unknown parameters, without prior knowledge of sample properties. In particular, it is possible to estimate more accurately both the amount of glue within a defect and the thermal contact resistance.

Original languageEnglish
Pages (from-to)350-358
Number of pages9
JournalComposites Part B: Engineering
Publication statusPublished - 2015 Jan 1


ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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