Influence of Particle Internal Pores on Hydration Kinetics and Microstructure Development in Tricalcium Silicate Hydration
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 12
Abstract
The accurate reconstruction of the morphologic organization of reactants would be a crucial aspect in understanding tricalcium silicate () hydration. However, particles are generally regarded as nonporous solids for simplification in most simulation models. This study aimed to analyze the influence of particle internal pores (PIPs) on hydration kinetics and microstructure development in hydration. The CEMHYD3D model was modified to generate the particles with pores, and its algorithm was accordingly updated. The cases of hydration with various internal pore size distributions (IPSDs) and particle porosities (PPs) were simulated using the modified model. The results indicated that (1) the integral absolute errors for the hydration heat obtained from the simulation considering PIPs decreased by 53.3%, compared with that without considering PIPs; (2) the hydration heat difference between the IPSD categories D and E at 50 h was only which accounted for 0.14% of the hydration heat obtained with the IPSD Category E; and (3) for a fixed PP, the dissolution of the particle with more small-sized PIPs would be more isotropic than that with less small-sized PIPs.
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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 financial support of the National Natural Science Foundation of China (Grant No. 51879092) is gratefully acknowledged. The support of the Fundamental Research Funds for Central Universities (Grant No. 2019B52814) is also gratefully acknowledged. This work is also sponsored by the Qing Lan Project of Jiangsu Province.
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 12 • December 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Dec 10, 2020
Accepted: Mar 31, 2021
Published online: Sep 17, 2021
Published in print: Dec 1, 2021
Discussion open until: Feb 17, 2022
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