Modeling influence of hysteretic moisture behavior on distribution of chlorides in concrete |
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| Affiliation: | 1. Institute of Construction Materials, University of Stuttgart, Pfaffenwaldring 4, 70560 Stuttgart, Germany;2. Faculty of Civil Engineering, University of Rijeka, Radmile Matejčić 3, 51000 Rijeka, Croatia;1. Aeronautics Institute of Technology – ITA, Marechal Eduardo Gomes-50-Sao Jose dos Campos, Sao Paulo, Brazil;2. University of Parana – UFPR, Jardim das Americas-Curitiba, Parana, Brazil;1. Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China;2. Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China;3. Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China;1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2. Division of Engineering and Policy for Sustainable Environment, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan;1. Department of Civil Engineering, Nagoya University, Nagoya, Japan;2. Takenaka Research & Development Institute, Takenaka Corporation, Chiba, Japan;1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, PR China;2. Department of Civil and Structural Engineering, The University of Sheffield, Sheffield S1 3JD, United Kingdom;3. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310034, PR China;1. University of Ljubljana, Faculty Chemistry and Chemical Technology, Aškerčeva 5, 1000 Ljubljana, Slovenia;2. University of Ljubljana, Faculty of Civil and Geodetic Engineering, Jamova 2, 1000 Ljubljana, Slovenia;3. Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University, B9052 Ghent, Belgium |
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| Abstract: | Aggressive environmental conditions, such as exposure to the sea climate or use of de-icing salts, can have a considerable influence on the durability of reinforced concrete structures due to corrosion-induced damage of reinforcement. Recently, the coupled 3D chemo-hygro-thermo-mechanical (CHTM) model for simulation of processes related to the chloride induced corrosion of steel reinforcement in concrete was developed. In the model, it is assumed that for wetting and drying of concrete, the transport of water is controlled by a single sorption curve. However, it is well known that concrete exhibits a hysteretic moisture behaviour, which significantly influences the distribution of moisture and chlorides. To account for the hysteretic moisture behaviour of concrete and for simulating a more realistic time and space distribution of moisture, the CHTM model was further improved. The proposed hysteretic model is implemented into a 3D finite element code and it is validated using a numerical example, which shows reasonably good agreement with the available test results. Similar to what is observed in the experimental tests, it is shown that due to the wetting and drying of the concrete surface, the peak concentration of chloride moves progressively deeper into the concrete specimen. |
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| Keywords: | Reinforced concrete Corrosion Chemo-hygro-thermo-mechanical model Hysteretic moisture behaviour Microplane model Finite elements |
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