Diffusion Resistance to Two Opposite-Side Chloride Ions of Concrete Based on the Diffusion Constant
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 5
Abstract
A new theoretical calculation method for the two opposite-side chloride diffusions was established, which is different from traditional diffusion calculations and the value-taking rule of error function. A new parameter, , a diffuse constant of the object being diffused, is proposed to reflect the internal diffusion characteristics of the object, and the concrete studied in this paper has a value between 2 and 3—closer to 3. By performing comparison experiments with a stronger effect of superposition and accumulation in concrete under two opposite-side chloride ion, diffusion can be found, which is consistent with the calculation results. In order to improve the resistance of concrete to two opposite-side chloride codiffusion, the concrete modified by nanosilica and nanotitania was designed in this study. Due to its excellent microstructure and porosity properties, the concrete modified by nanosilica at 1.5% and nanotitania at 0.5% cement weight showed an excellent resistance to the single-side chloride ion diffusion, and the same goes for two opposite-side diffusions.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article. Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The research is supported by the National Natural Science Foundation of China (NSFC) (Grant No. 41977230); the National Key Research and Development Project (Grant Nos. 2017YFC1501203 and 2017YFC1501201); the Special Fund Key Project of Applied Science and Technology Research and Development in Guangdong (Grant No. 2015B090925016 and 2016B010124007); the Research Foundation of Education Bureau of Hunan Province (Grant Nos. 16C0439, 16C0431, and 19C0519); Science and Technology Plan Project of Hengyang City, China (Grant No. 2019jh010652); Hunan Institute of Technology Undergraduate Teaching Engineering Construction Project, China (Grant No. AX1807); and Hunan Institute of Technology Undergraduate Research-Based Learning and Innovative Experimental Program, China (Grant Nos. HGDC1816 and HGDC1841).
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 5 • May 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Jul 17, 2021
Accepted: Sep 16, 2021
Published online: Feb 24, 2022
Published in print: May 1, 2022
Discussion open until: Jul 24, 2022
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