Passive infrared thermography technique for concrete structures health investigation: case studies

Non-destructive testing techniques are often employed for periodic maintenance and reparation of construction works, especially for large-scale structures. These techniques can be applied during construction or even on existing structures. Out of the non-destructive testing techniques, infrared thermography is a powerful technique to investigate structural conditions and locate the damages because of the ability to visualize unseen subsurface delamination through thermal images. The technology of infrared detectors has significantly developed with high-quality products and acceptable prices. Therefore, the applications of the technique are feasible. This article introduces current infrared thermography techniques. Case studies have been implemented using passive infrared thermography for investigating construction works, such as buildings, warehouses, and bridges. The study has elucidated the applications of the method in detecting moisture penetration, area of insulation, energy loss, and subsurface delamination. A guide to passive thermography has been recommended for site inspection. Finally, common errors during thermal surveying are discussed to help engineers reduce unnecessary mistakes.

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Availability of data and material

The data that supports the finding in this study are not publicly available. Any access request should be sent to huytq@ntu.edu.vn.

References

Acknowledgements

Grants supported this research funded by Nha Trang University (No. TR2020-13-23), Korean government (MSIT) (No. 2021R1A2C1005587) and the contributions of the research team members in the SA-NDE-T Lab at the Civil Engineering Department of Nha Trang University.

Funding

The authors have not disclosed any funding.

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Authors and Affiliations

  1. Department of Civil Engineering, Nha Trang University, 57000, Khanh Hoa, Vietnam Quang Huy Tran, Quoc My Dang, Xuan Tung Pham, Thanh Chung Truong & Thang Xiem Nguyen
  2. Department of Architecture and Civil Engineering, Chonnam National University, Gwangju, 61186, Korea Jungwon Huh
  1. Quang Huy Tran