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Computers and Concrete Volume 15, Number 5, May 2015 , pages 847-864 DOI: https://doi.org/10.12989/cac.2015.15.5.847 |
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A reaction-diffusion modeling of carbonation process in self-compacting concrete |
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Chuanqing Fu, Hailong Ye, Xianyu Jin, Nanguo Jin and Lingli Gong
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| Abstract | ||
| In this paper, a reaction-diffusion model of carbonation process in self-compacting concrete (SCC) was realized with a consideration of multi-field couplings. Various effects from environmental conditions, e.g. ambient temperature, relative humidity, carbonation reaction, were incorporated into a numerical simulation proposed by ANSYS. In addition, the carbonation process of SCC was experimentally investigated and compared with a conventionally vibrated concrete (CVC). It is found that SCC has a higher carbonation resistance than CVC with a comparable compressive strength. The numerical solution analysis agrees well with the test results, indicating that the proposed model is appropriate to calculate and predict the carbonation process in SCC. The parameters sensitivity analysis also shows that the carbon dioxide diffusion coefficient and moisture field are essentially crucial to the carbonation process in SCC. | ||
| Key Words | ||
| SCC; carbonation process; numerical simulation; reaction-diffusion modeling | ||
| Address | ||
| Chuanqing Fu: College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China; College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, 310014, China; Zhejiang Key Laboratory of Civil Engineering Structures & Disaster Prevention and Mitigation Technology, Hangzhou, 310014, China Hailong Ye: Department of Civil and Environmental Engineering, The Pennsylvania State University, 3127 Research Drive, PA, 16801, USA Xianyu Jin, Nanguo Jin and Lingli Gong: College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China | ||