Deterioration Index Analysis of Cemented Sand and Gravel Materials under Freeze–Thaw Action
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 4
Abstract
The freeze–thaw cycle test, uniaxial compressive strength test, dynamic elastic modulus test, and nuclear magnetic resonance (NMR) scanning test were carried out to study the freeze–thaw resistance of cemented sand and gravel materials in cold areas. The compressive strength, relative dynamic elastic modulus, porosity, and the most probable pore size of macroscopic degradation indexes before and after freezing and thawing were analyzed. The results show that: (1) both the compressive strength and relative elastic modulus gradually decrease with the increase of the number of freeze–thaw cycles, the porosity increases with the rise of the number of processes, and the growth rate gradually accelerates; (2) with the increase in freeze–thaw cycles, the spectral peak shifts to the larger aperture, the harmful aperture accounts for the most significant proportion, and the most probable pore size and minimum aperture increase; and (3) according to the gray entropy correlation method, the deterioration index that significantly influences the compressive strength and elastic modulus of cemented sand and gravel materials is the total porosity, and the most influential pore size range is 50–200 nm.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published paper.
Acknowledgments
Funding was provided by the National Natural Science Foundation of China (52109154) study on the evolution mechanism of macro and micro damage of cemented sand and gravel dam under extreme temperature.
Author contributions: Yiqing Zhang, Zekun Wang, Qiongyao Wang, and Wenhao Zhao are responsible for this paper’s experiments and data collation. Lei Guo and Wenfeng Tian are account table for the overall direction and advice of the paper. All authors have read and agreed to the published version of the manuscript.
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 4 • April 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Jun 3, 2023
Accepted: Oct 2, 2023
Published online: Jan 29, 2024
Published in print: Apr 1, 2024
Discussion open until: Jun 29, 2024
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