Effect of Synthesis Conditions on Particle Size Morphology, Structure, and Acceleration Performance of C-A-S-H Nanoparticles
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 11
Abstract
In recent decades, C-S-H (calcium-silicate-hydrate) nanoparticles have been regarded as promising accelerators for early-age compressive strength enhancement of cementitious materials. In previous research, C-A-S-H (calcium-alumina-silicate-hydrate) nanoparticles were synthesized and exhibited superior acceleration performance than C-S-H nanoparticles. However, how the synthesis conditions affect the performance of C-A-S-H nanoparticles has not been comprehensively investigated, limiting the optimization of the performance of C-A-S-H nanoparticles. This study explores the effect of synthesis conditions (i.e., pH value, reactant droplet rates, and reaction time) of C-A-S-H nanoparticles to accelerate the hydration of portland cement. The results show that the obvious differences in acceleration performance among C-A-S-H nanoparticles are derived from varing pH values, reactant droplet rates, and reaction times, and the optimal synthesis condition is identified to provide guidance on the production of high-performance C-A-S-H nanoparticles.
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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
We are grateful to the China National Natural Science Foundation (51925205 and 52202023), Wuhan Science and Technology Bureau (2020020601012279), Chongqing Natural Science Foundation (CSTB2022NSCQ-MSX0656), and State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology, SYSJJ2022-10) for the financial support for this work.
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 11 • November 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Sep 26, 2022
Accepted: Apr 4, 2023
Published online: Aug 26, 2023
Published in print: Nov 1, 2023
Discussion open until: Jan 26, 2024
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