Effect of Crack Self-Healing on Concrete Diffusivity: Mesoscale Dynamics Simulation Study
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 6
Abstract
Self-healing properties of concrete mean that concrete can repair cracks and effectively slow down the penetration of chloride ions. This work develops a chloride ion transport mesoscale model to study how chloride ions diffuse into concrete with crack self-healing properties. This model consists of aggregate, mortar, interfacial transition zone (ITZ), crack, and damage zone (DZ) phases. It was validated by experimental data. Based on this mesoscale model, the dynamic crack self-healing process was simulated by moving mesh technology using finite-element software. Crack and DZ sizes varied as a function of time. Distribution of the chloride concentration in cracks and DZs during self-healing and the influence of self-healing rate on chloride concentration distribution, as well as that of the ITZ and DZ on chloride concentration distribution, are analyzed and discussed.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors gratefully acknowledge the financial support from National Key R&D Program of China (2017YFB0309904), National Science Fund of China (5150080804), and the 973 Program (2015CB655100).
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 6 • June 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: May 27, 2019
Accepted: Dec 2, 2019
Published online: Mar 31, 2020
Published in print: Jun 1, 2020
Discussion open until: Aug 31, 2020
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