Investigation on the Distribution Characteristics of Partial Carbonation Zone of Concrete
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 1
Abstract
This paper aims to investigate the distribution characteristics of the partial carbonation zone of concrete. A series of experimental carbonation tests considering the effect of external temperature, concentration of , and relative humidity were implemented. The pH values of the simulated pore solution of the powder sample of concrete are presented. The carbonation model based on the mass-transfer theory is proposed. The results indicate that the pH value of the simulated pore solution can be applied to demarcate the complete and partial carbonation zones of carbonated concrete. The numerical model can be used to preferably simulate the distribution of complete and partial carbonation zones. The length of the partial carbonation zone increases with the increase of temperature and decreases with the increase of relative humidity. The lengths of the partial carbonation zone generally increase with the increase of concentration of . Concrete with a high initial diffusion coefficient is conducive to the diffusion of carbon dioxide. The length of the complete and partial carbonation zones can be sensitively affected by the activation energy.
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Data Availability Statement
Some or all data, models, or code that support the research findings of this study are available from the corresponding author by reasonable request, including the experimental and numerical data.
Acknowledgments
The authors are grateful for the financial support from the Natural Science Foundation of Hubei Province of China (Grant No. 2018CFB642) and National Natural Science Foundation of China (Grant No. 51379111).
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 1 • January 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Mar 29, 2020
Accepted: Jul 13, 2020
Published online: Oct 27, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 27, 2021
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