Time-dependent model for in-situ concrete carbonation depth under combined effects of temperature and relative humidity
Fluctuations in temperatures and relative humidity in the external environment significantly influence the carbonation depth in concrete structures, making it an essential topic when considering concrete durability. This study aims to predict and compare the carbonation depth of concrete under vario...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525001779 |
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| author | Ting Du Yongjia Cai Yipu Guo Jinghao Chen Sen Chen Mofang Yuan Fulin Qu |
| author_facet | Ting Du Yongjia Cai Yipu Guo Jinghao Chen Sen Chen Mofang Yuan Fulin Qu |
| author_sort | Ting Du |
| collection | DOAJ |
| description | Fluctuations in temperatures and relative humidity in the external environment significantly influence the carbonation depth in concrete structures, making it an essential topic when considering concrete durability. This study aims to predict and compare the carbonation depth of concrete under various temperature and relative humidity conditions through both experiment and modeling. The experimental results demonstrate an exponential relationship between carbonation depth and temperature at all ages of the concrete, showing a consistent increase, with rising temperature. Additionally, the carbonation depth of concrete exhibits a parabolic relationship with relative humidity, characterized by an initial increase followed by a subsequent decrease, forming a downward-opening curve. This relationship is well-corrected with the data. Moreover, sensitivity analysis reveals a noticeable variation in sensitivity factors related to temperature and relative humidity after a 28-day carbonation period, with the sensitivity factor for temperature being higher than that for relative humidity. Finally, by employing the Sensitivity Analysis and Least-Square Fitting (SA-LSF) method, a novel model is developed that incorporates both temperature and relative humidity as influential factors in predicting carbonation depth under diverse environmental conditions. The experimental results align well with the model’s predictions, confirming its ability to accurately forecast carbonation depth of concrete. These findings provide significant insights for practical applications, as the model can give valuable predictions for carbonation in concrete. |
| format | Article |
| id | doaj-art-7fad0738201d40cdaf857f94739c5980 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-7fad0738201d40cdaf857f94739c59802025-02-12T05:31:07ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04379Time-dependent model for in-situ concrete carbonation depth under combined effects of temperature and relative humidityTing Du0Yongjia Cai1Yipu Guo2Jinghao Chen3Sen Chen4Mofang Yuan5Fulin Qu6School of Intelligent Transportation and Engineering, Guangzhou Maritime University, Guangdong 510725, China; School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Hubei 430074, ChinaSchool of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Hubei 430074, ChinaCentre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, The University of New South Wales, NSW 2052, AustraliaSchool of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Hubei 430074, ChinaChina Nuclear Power Operation Technology Corporation LTD, Wuhan, Hubei 430223, ChinaFaculty of Arts, Design and Architecture, The University of New South Wales, NSW 2052, AustraliaCentre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, The University of New South Wales, NSW 2052, Australia; Corresponding author.Fluctuations in temperatures and relative humidity in the external environment significantly influence the carbonation depth in concrete structures, making it an essential topic when considering concrete durability. This study aims to predict and compare the carbonation depth of concrete under various temperature and relative humidity conditions through both experiment and modeling. The experimental results demonstrate an exponential relationship between carbonation depth and temperature at all ages of the concrete, showing a consistent increase, with rising temperature. Additionally, the carbonation depth of concrete exhibits a parabolic relationship with relative humidity, characterized by an initial increase followed by a subsequent decrease, forming a downward-opening curve. This relationship is well-corrected with the data. Moreover, sensitivity analysis reveals a noticeable variation in sensitivity factors related to temperature and relative humidity after a 28-day carbonation period, with the sensitivity factor for temperature being higher than that for relative humidity. Finally, by employing the Sensitivity Analysis and Least-Square Fitting (SA-LSF) method, a novel model is developed that incorporates both temperature and relative humidity as influential factors in predicting carbonation depth under diverse environmental conditions. The experimental results align well with the model’s predictions, confirming its ability to accurately forecast carbonation depth of concrete. These findings provide significant insights for practical applications, as the model can give valuable predictions for carbonation in concrete.http://www.sciencedirect.com/science/article/pii/S2214509525001779In-situ carbonation depthTemperatureRelative humidityLeast-square fittingPrediction model |
| spellingShingle | Ting Du Yongjia Cai Yipu Guo Jinghao Chen Sen Chen Mofang Yuan Fulin Qu Time-dependent model for in-situ concrete carbonation depth under combined effects of temperature and relative humidity Case Studies in Construction Materials In-situ carbonation depth Temperature Relative humidity Least-square fitting Prediction model |
| title | Time-dependent model for in-situ concrete carbonation depth under combined effects of temperature and relative humidity |
| title_full | Time-dependent model for in-situ concrete carbonation depth under combined effects of temperature and relative humidity |
| title_fullStr | Time-dependent model for in-situ concrete carbonation depth under combined effects of temperature and relative humidity |
| title_full_unstemmed | Time-dependent model for in-situ concrete carbonation depth under combined effects of temperature and relative humidity |
| title_short | Time-dependent model for in-situ concrete carbonation depth under combined effects of temperature and relative humidity |
| title_sort | time dependent model for in situ concrete carbonation depth under combined effects of temperature and relative humidity |
| topic | In-situ carbonation depth Temperature Relative humidity Least-square fitting Prediction model |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525001779 |
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