Influence of Sand Content on Secondary Consolidation Characteristics of Sand–Fine Mixtures
Publication: International Journal of Geomechanics
Volume 24, Issue 5
Abstract
In order to understand the influence of sand content on the secondary consolidation behavior of sand–fine mixtures, a series of one-dimensional creep tests were conducted. These tests used mixtures with sand contents of 0%, 16.67%, 28.57%, 50%, and 60% and were run for 3,000 min. As the sand content increases, the structure of the mixtures transitions from being fine-supported to sand-supported. This results in changes in the time at the end of primary consolidation (TEOP), the proportion of secondary consolidation deformation in the total deformation (PCT), and the coefficient of secondary consolidation. These parameters decrease before the sand content reaches 28.57% and increases after this point. The sand–fine mixtures with a sand content of 28.57% exhibit the minimum TEOP, PCT, and coefficient of secondary consolidation. When the sand content is less than 28.57%, bound water (especially weakly bound water) significantly impacts the secondary consolidation behavior of the sand–fine mixtures. However, when the sand content exceeds 28.57%, the secondary consolidation deformation of the mixtures is primarily governed by particle crushing in the sand grains.
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Data Availability Statement
All data generated or used during the study appear in the published article.
Acknowledgments
The study was supported by the Natural Science Foundation of China (Project No. 41962016), Ningxia Key Fund Project (Project No. 2023AAC02023), and First-class Discipline Construction Project of Ningxia Higher Education Institutions (NXYLXK2021A03).
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International Journal of Geomechanics
Volume 24 • Issue 5 • May 2024
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© 2024 American Society of Civil Engineers.
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Received: Apr 5, 2023
Accepted: Oct 21, 2023
Published online: Feb 16, 2024
Published in print: May 1, 2024
Discussion open until: Jul 16, 2024
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