Numerical analysis of the effect of moisture-dependent thermal diffusivity on concrete delamination depth estimation using pulsed infrared thermography for tropical coastal applications
DOI:
https://doi.org/10.21831/jps.v31i2.102029Keywords:
numerical analysis, pulsed infrared thermography, concrete delamination, thermal diffusivity, Monte Carlo simulationAbstract
This numerical study evaluates how moisture-induced variations in thermal diffusivity affect concrete delamination depth estimation using pulsed infrared thermography (PIRT). We employed a one-dimensional heat diffusion model, representing the delamination as a thermal barrier. We generated synthetic thermal responses for dry and saturated concrete with delamination depths ranging from 1 to 5 cm, using a 1 s sampling interval over a 4-h observation period. To represent measurement uncertainty, we added Gaussian noise with a standard deviation of 0.05 °C to each response, then smoothed the signals with a centered moving average using a 61-sample window. We evaluated the reliability of peak-time inversion through 200 Monte Carlo realizations under matched and mismatched conditions. The results show that increasing delamination depth reduces the thermal-contrast amplitude and increases the uncertainty in peak-time determination, with a more pronounced effect in saturated concrete because of its lower thermal-response amplitude. Under matched conditions, the estimation bias reached approximately 10.0% for dry concrete and 17.0% for saturated concrete, with maximum RMSE values of 1.10 and 1.35 cm, respectively. Under mismatched conditions, using the thermal diffusivity of dry concrete to invert the thermal response of saturated concrete produced a systematic shift of approximately −2.72% relative to the matched condition, consistent with the analytical prediction. For the parameters investigated, these results indicate that uncertainty in peak-time determination contributes more strongly to the overall estimation error than thermal-diffusivity mismatch. Nevertheless, using a thermal-diffusivity value representative of the actual moisture condition remains important for improving the reliability of PIRT-based delamination depth estimation in tropical coastal environments.
References
Almond, D. P., & Pickering, S. G. (2012). An analytical study of the pulsed thermography defect detection limit. Journal of Applied Physics, 111(9). https://doi.org/10.1063/1.4704684
Asadi, I., Sha, P., Fitri, Z., & Abu, B. (2018). Thermal conductivity of concrete – A review. Journal of Building Engineering, 20(July), 81–93. https://doi.org/10.1016/j.jobe.2018.07.002
Bamogo, S., Zoma, F., Malbila, E., & Toguyeni, D. Y. K. (2023). Thermal Characterization of Concrete and Cement Mortar from Construction Sites and Industrial Production Units in the City of Ouagadougou with a View to Standardization in Energy Certification. Engineering, 15(06), 396–415. https://doi.org/10.4236/eng.2023.156031
Fischer, A. (2026). Thermography-based localisation of laminar-turbulent transition on airfoils: a fundamental limit of measurability. Quantitative InfraRed Thermography Journal, 00(00), 1–16. https://doi.org/10.1080/17686733.2026.2616874
Huh, J., Mac, V. H., Tran, Q. H., Lee, K., Lee, J., & Kang, C. (2018). Detectability of Delamination in Concrete Structure Using Active Infrared Thermography in Terms of Signal-to-Noise Ratio. Applied Sciences, 8, 1–19. https://doi.org/10.3390/app8101986
Ibrahim, A., Faris, N., Zayed, T., Qureshi, A. H., & Abdelkader, E. M. (2026). Application of infrared thermography in concrete bridge deck inspection : current practices , challenges and future needs. Nondestructive Testing and Evaluation, 41(1), 1–44. https://doi.org/10.1080/10589759.2024.2443810
Khan, M. I. (2002). Factors affecting the thermal properties of concrete and applicability of its prediction models. Building and Environment, 37, 607–614.
Kodur, V. (2014). Properties of concrete at elevated temperatures. ISRN Civil Engineering, 2014. https://doi.org/10.1155/2014/468510
Omar, T., Nehdi, M. L., & Zayed, T. (2018). Infrared thermography model for automated detection of delamination in RC bridge decks. Construction and Building Materials, 168, 313–327. https://doi.org/10.1016/j.conbuildmat.2018.02.126
Pedram, M., Taylor, S., Hamill, G., Robinson, D., Obrien, E. J., & Uddin, N. (2024). Objective characterisation of reinforced concrete with progressive corrosion defects through clustering and thresholding of infrared images. Measurement, 225(November 2023), 114017. https://doi.org/10.1016/j.measurement.2023.114017
Pozzer, S., Omidi, Z., El, A., López, F., Ibarra-castanedo, C., & Maldague, X. (2024). Passive infrared thermography for subsurface delamination detection in concrete infrastructure : Capabilities. Construction and Building Materials, 419(February), 135542. https://doi.org/10.1016/j.conbuildmat.2024.135542
Qu, Z., Jiang, P., & Zhang, W. (2020). Development and Application of Infrared Thermography Non-Destructive Testing Techniques. Sensors, 20.
Raja, B. N. K., Miramini, S., Duffield, C., Sofi, M., & Zhang, L. (2021). Infrared thermography detection of delamination in bottom of concrete bridge decks. Structural Control and Health Monitoring, 29(3). https://doi.org/10.1002/stc.2886
Revuelta, D., García-Calvo, J. L., Carballosa, P., & Pedrosa, F. (2021). Evaluation of the influence of the degree of saturation, measuring time and use of a conductive paste on the determination of thermal conductivity of normal and lightweight concrete using the hot-wire method. Materiales de Construccion, 71(344). https://doi.org/10.3989/MC.2021.03621
Shan, Z., Yang, J., Sanjuán, M. A. F., Wu, C., & Liu, H. (2022). A novel adaptive moving average method for signal denoising in strong noise background. European Physical Journal Plus, 137(1). https://doi.org/10.1140/epjp/s13360-021-02279-x
Tong, L., Savija, B., Zhang, M., Xiong, Q. X., & Liu, Q. (2025). Chloride penetration in concrete under varying humidity and temperature changes : A numerical study. 458(April 2024), 23–26. https://doi.org/10.1016/j.conbuildmat.2024.138380
Tran, Q. H., Huh, J., Kang, C., Lee, B. Y., Kim, I., & Ahn, J. (2018). Detectability of Subsurface Defects with Different Width-to-Depth Ratios in Concrete Structures Using Pulsed Thermography. Journal of Nondestructive Evaluation, 123, 1–11. https://doi.org/10.1007/s10921-018-0489-x
Wang, B., Zhao, X., Dong, T., Li, B., Zhang, F., Su, J., Ren, Y., Duan, X., Lin, H., Miao, Y., & Radamson, H. H. (2025). Convergence of Thermistor Materials and Focal Plane Arrays in Uncooled Microbolometers: Trends and Perspectives. Nanomaterials, 15(17), 1–46. https://doi.org/10.3390/nano15171316
Wci´slik, W., & Wci´slik, S. (2026). Infrared Thermography for Defect Detectability in Structural Health Monitoring of Concrete Structures : Heat Transfer Physics , Resolution Limits , and AI-Assisted Diagnostics. Materials, 19, 3–10.
Wei, Y., Zhang, S., Luo, Y., Ding, L., & Zhang, D. (2021). Accurate depth determination of defects in composite materials using pulsed thermography. Composite Structures, 267(October 2020), 113846. https://doi.org/10.1016/j.compstruct.2021.113846
Zhuo, L., Zhu, Y. X. J., & Yi, C. L. C. L. F. (2024). Quantitative Evaluation of Interfacial Defect Size and Pattern by Solving a 3D Inverse Problem Based on Step Heating Thermography. Experimental Mechanics, 64, 245–259. https://doi.org/10.1007/s11340-023-01021-1
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