Revealing the Impact of Depth and Surface Property Variations on Infrared Detection of Delamination in Concrete Structures Under Natural Environmental Conditions
Infrared thermography (IRT) is an effective nondestructive testing method for detecting delamination in concrete structures. However, erroneous data interpretation often diminishes its practical utility due to surface irregularities (e.g., color variations) during inspection. These “noisy conditions...
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MDPI AG
2024-12-01
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| author | Chongsheng Cheng Dequan Chen Shuai Shao Ri Na Haonan Cai Hongwen Zhou Bo Wu |
| author_facet | Chongsheng Cheng Dequan Chen Shuai Shao Ri Na Haonan Cai Hongwen Zhou Bo Wu |
| author_sort | Chongsheng Cheng |
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| description | Infrared thermography (IRT) is an effective nondestructive testing method for detecting delamination in concrete structures. However, erroneous data interpretation often diminishes its practical utility due to surface irregularities (e.g., color variations) during inspection. These “noisy conditions” alter the temperature distribution of the structure under solar heating cycles, making it challenging to quantify delamination based on the developed thermal contrast (ΔT). This study experimentally investigates the impact of different surface conditions (bare concrete vs. painted surfaces) on ΔT. Artificial delamination at varying depths was simulated and tested under natural environmental conditions, where the maximum ΔT values for shallow delamination were 9.40 °C (bare concrete), 7.35 °C (yellow paint), and 5.15 °C (white paint), respectively. This study measured and analyzed the absorptivity (bare concrete: 0.652, yellow paint: 0.538, and white paint: 0.369), emissivity, and the temperature difference (δT) between non-delaminated areas and air, revealing their correlation with ΔT variation. Based on the results, three typical scenarios are proposed to correlate δT with delamination detection. These findings contribute to a better understanding of the optimal detection window and present a new approach to quantifying delamination at different time windows. The conclusion also discusses the limitations of this study and future research directions. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2024-12-01 |
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| series | Buildings |
| spelling | doaj-art-0dd5a8fc244e4604be1fd8ccc33183872025-01-10T13:15:46ZengMDPI AGBuildings2075-53092024-12-011511010.3390/buildings15010010Revealing the Impact of Depth and Surface Property Variations on Infrared Detection of Delamination in Concrete Structures Under Natural Environmental ConditionsChongsheng Cheng0Dequan Chen1Shuai Shao2Ri Na3Haonan Cai4Hongwen Zhou5Bo Wu6State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaSchool of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaChongqing Geomatics and Remote Sensing Center, Chongqing 401120, ChinaDepartment of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, USASchool of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaChongqing Geomatics and Remote Sensing Center, Chongqing 401120, ChinaSchool of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaInfrared thermography (IRT) is an effective nondestructive testing method for detecting delamination in concrete structures. However, erroneous data interpretation often diminishes its practical utility due to surface irregularities (e.g., color variations) during inspection. These “noisy conditions” alter the temperature distribution of the structure under solar heating cycles, making it challenging to quantify delamination based on the developed thermal contrast (ΔT). This study experimentally investigates the impact of different surface conditions (bare concrete vs. painted surfaces) on ΔT. Artificial delamination at varying depths was simulated and tested under natural environmental conditions, where the maximum ΔT values for shallow delamination were 9.40 °C (bare concrete), 7.35 °C (yellow paint), and 5.15 °C (white paint), respectively. This study measured and analyzed the absorptivity (bare concrete: 0.652, yellow paint: 0.538, and white paint: 0.369), emissivity, and the temperature difference (δT) between non-delaminated areas and air, revealing their correlation with ΔT variation. Based on the results, three typical scenarios are proposed to correlate δT with delamination detection. These findings contribute to a better understanding of the optimal detection window and present a new approach to quantifying delamination at different time windows. The conclusion also discusses the limitations of this study and future research directions.https://www.mdpi.com/2075-5309/15/1/10concrete delaminationinfrared detectionsurface condition variationsdelamination depth |
| spellingShingle | Chongsheng Cheng Dequan Chen Shuai Shao Ri Na Haonan Cai Hongwen Zhou Bo Wu Revealing the Impact of Depth and Surface Property Variations on Infrared Detection of Delamination in Concrete Structures Under Natural Environmental Conditions Buildings concrete delamination infrared detection surface condition variations delamination depth |
| title | Revealing the Impact of Depth and Surface Property Variations on Infrared Detection of Delamination in Concrete Structures Under Natural Environmental Conditions |
| title_full | Revealing the Impact of Depth and Surface Property Variations on Infrared Detection of Delamination in Concrete Structures Under Natural Environmental Conditions |
| title_fullStr | Revealing the Impact of Depth and Surface Property Variations on Infrared Detection of Delamination in Concrete Structures Under Natural Environmental Conditions |
| title_full_unstemmed | Revealing the Impact of Depth and Surface Property Variations on Infrared Detection of Delamination in Concrete Structures Under Natural Environmental Conditions |
| title_short | Revealing the Impact of Depth and Surface Property Variations on Infrared Detection of Delamination in Concrete Structures Under Natural Environmental Conditions |
| title_sort | revealing the impact of depth and surface property variations on infrared detection of delamination in concrete structures under natural environmental conditions |
| topic | concrete delamination infrared detection surface condition variations delamination depth |
| url | https://www.mdpi.com/2075-5309/15/1/10 |
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