Microstructure, Hydration, and Chloride Binding Behavior of Limestone Calcined Clay Cement Prepared Using Seawater
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 12
Abstract
Limestone calcined clay cement () is rich in aluminates, which can bind many corrosive ions in seawater. The microstructure, hydration, and chloride binding behavior of prepared using seawater are investigated in this study. Seawater significantly enhances the compressive strength of paste up to 28 days and further refines the pore structure of . Correspondingly, the promotion of seawater on the hydration of portland cement (PC) paste begins to decrease after 72 h, although it still promotes the hydration of paste until 200 h. When paste is prepared using seawater, about 75% of total chloride ions are chemically bound to form Friedel’s salts at 28 days and 80% of them are formed at 3 days. Moreover, the free chloride ions content in paste prepared using seawater is paste at 28 days, which is only 28% of that in PC paste prepared using seawater and only 6% of total chloride ions. It shows that has strong chloride binding ability and great potential for preparing seawater concrete.
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Data Availability Statement
All data that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors appreciate the financial support from China National Key R & D Program (Grant No. 2018YFE0106300).
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 12 • December 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 21, 2022
Accepted: May 5, 2023
Published online: Sep 27, 2023
Published in print: Dec 1, 2023
Discussion open until: Feb 27, 2024
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