Pore Structure Characters and Oxygen Permeability Interpreted by Katz–Thompson Model of Fly Ash Concrete
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 5
Abstract
The relationship between the characteristics of concrete pore structures and intrinsic permeability was investigated. The concrete pore structure incorporating fly ash was characterized by parameters including total porosity, pore size distribution (PSD), tortuosity, and characteristic pore sizes. The results indicate that: (1) there is a weak correlation between total porosity and critical pore size concerning oxygen permeability as interpreted by the Katz–Thompson model; (2) pores with diameters exceeding 100 nm serve as the primary tunnel for oxygen percolation in fly ash concrete; and (3) the porosity of pores larger than 100 nm and the average pore diameter exhibit the strongest correlation with oxygen permeability in fly ash concrete, as interpreted by the Katz–Thompson model.
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Data Availability Statement
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 work described in this paper was supported by the grant from the National Natural Science Foundation of China (Project Nos. 52078148 and 52108125), Special Research Projects in Key Areas for Colleges and Universities in Guangdong Province (Science and Technology Plan for Rural Revitalization, Project No. 2021ZDZX4009), Natural Science Foundation of Guangdong Province, China (Project No. 2022A1515010038), Basic Research Program (Municipality-University joint fund) of Science and Technology Bureau of Guangzhou (Project No. SL2023A03J00880), Tertiary Education Scientific research project of Guangzhou Municipal Education Bureau (Project No. 202235263), and Zhuhai Municipal Science and Technology Planning Project in the Field of Social Development (Project No. ZH22036201210032PWC). The authors are very grateful to Prof. Zhou Chunsheng for the supplication of the CemBureau device.
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 5 • May 2024
Copyright
© 2024 American Society of Civil Engineers.
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Received: May 2, 2023
Accepted: Nov 1, 2023
Published online: Feb 24, 2024
Published in print: May 1, 2024
Discussion open until: Jul 24, 2024
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