Subsurface defect detection in concrete using infrared thermography

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Concrete is the second most-consumed substance in the built environment and civil infrastructure, such as transportation networks. As many of the in-use elements of a transportation network e.g. bridges are ageing, the requirement for novel monitoring and maintenance methods is extremely urgent. The infrared thermography (IRT) method has shown potential for real-time, non-contact, wide-area inspection of concrete components and detection of hidden subsurface damages. The main challenges of IRT for structural inspection and health monitoring are assessing the material thermal properties, data collection mechanism (e.g. thermal camera specification, positioning (distance and angle), and post-processing of large data sets. Moreover, the subsurface defects, which are the result of reinforcement corrosion, cause the formation of gaps, delamination, and voids filled with air and/or water. The shape, area, thickness, and depth, of these subsurface defects, significantly affect the heat diffusion mechanism in the concrete and the formation of distinguishable thermal contrast on the thermal detector. Therefore, the present paper delivers some results extracted from recent ongoing tests in Queen's University Belfast (QUB) to identify concrete subsurface defects in a review of the state-of-the-art context. The time history of thermal contrast, as well as infrared snapshots and temperature contours on the surface, are adopted to evaluate the effect of defect geometry on subsurface damage detection. This paper highlights the necessity and significance of ongoing researches and studies to establish various aspects of utilising IRT as a practical method for structural health monitoring (SHM) in concrete infrastructure.

Original languageEnglish
Title of host publicationProceedings of the 10th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII-10)
EditorsÁlvaro Cunha, Elsa Caetano
PublisherInternational Society for Structural Health Monitoring of Intelligent Infrastructure, ISHMII
Pages1155-1160
Publication statusPublished - 30 Jun 2021
Event10th International Conference on Structural Health Monitoring of Intelligent Infrastructure, SHMII 2021 - Portugal, Porto, Portugal
Duration: 30 Jun 202102 Jul 2021
https://web.fe.up.pt/~shmii10/

Publication series

NameInternational Conference on Structural Health Monitoring of Intelligent Infrastructure: Proceedings
ISSN (Electronic)2564-3738

Conference

Conference10th International Conference on Structural Health Monitoring of Intelligent Infrastructure, SHMII 2021
Country/TerritoryPortugal
CityPorto
Period30/06/202102/07/2021
Internet address

Keywords

  • Concrete bridges
  • Infrared thermography (IRT)
  • Subsurface defect
  • Thermal contrast

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Networks and Communications
  • Information Systems and Management
  • Civil and Structural Engineering
  • Building and Construction

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