Evaluation of Mechanical Performance of Compacted Magnesium Hydroxide after Carbonation Curing
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 5
Abstract
In this study, the potential to directly use magnesium hydroxide as an alternative binder was investigated. A compaction molding technique was employed, where magnesium hydroxide powder was mixed with water at relatively low water-to-binder ratios, compacted in a mold, then subjected to accelerated curing at room temperature to form a carbonate binder. The influence of water-to-binder ratio and compaction pressure on the mechanical and microstructural properties of compacted magnesium hydroxide systems under accelerated curing was evaluated. Results showed that compaction pressure and water-to-binder ratio have a significant effect on uptake and strength development. An optimum compaction level was found to be 3 MPa in this study, where compressive strengths of and were reached after 2 and 5 days of curing. Results highlight the potential to tailor the mechanical properties of magnesium hydroxide systems through processing, and to reach strengths comparable to those of magnesium oxide systems but with the advantage of skipping the calcination step and reducing water demand.
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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 authors would like to acknowledge Columbia University’s School of Engineering and Applied Science (SEAS) Interdisciplinary Research Seed (SIRS) Program for financial support, and technical support by the staff of Columbia University’s Carleton Laboratory. The first author is grateful for the financial support given by the Scientific and Technical Research Council of Turkey (TÜBİTAK). We would also like to thank Palash Badjatya and Roberto Interiano for their help with this work.
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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: Feb 28, 2021
Accepted: Sep 10, 2021
Published online: Feb 22, 2022
Published in print: May 1, 2022
Discussion open until: Jul 22, 2022
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