Effect of Different Lime-Anhydrite Ratios on the Hydration Process of Sulfoaluminate Cement
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 10
Abstract
In this paper, the influence of lime-anhydrite () ratio on the strength development, cement hydration, and setting time of calcium sulfoaluminate cement (CSA) is systemically investigated. Based on Raman spectroscopy and Thermogravimetric and differential thermal analysis (TG-DTA), the results showed that the hydration rate and the amounts and proportion of hydration products [monosulfate ettringe (AFm), ettringite (AFt), and ] were strongly influenced by . When was 1:3, the AFt formation was present by the fastest rate and accounted for the largest proportion of the whole hydration products, further resulting in the highest strength. When , the process of cement hydration can be divided into induction, the formation of AFt and AFm, interconversion between AFm and AFt, and stabilization stage, respectively. However, when , there was no induction stage, and hydration process directly went into the accelerated period.
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Data Availability Statement
No data, models, or code were generated or used during the study.
Acknowledgments
The authors would like to acknowledge the financial support provided by the National Key R&D Projects of China Grant (No. 2017YFC0603004), National Natural Science Foundation of China (No. 52078192), Key Fund of the National Natural Science Foundation of China (No. U1905216), the Natural Science Foundation of Henan Province in China (Nos. 182300410207 and 212300410043), and the Education Department of Henan Province Basic Research Program, China (No. 21A430018).
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 10 • October 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Sep 14, 2021
Accepted: Jan 26, 2022
Published online: Jul 19, 2022
Published in print: Oct 1, 2022
Discussion open until: Dec 19, 2022
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