Effect of Curing Stress on Compression Behavior of Cement-Treated Dredged Sediment
Publication: International Journal of Geomechanics
Volume 20, Issue 11
Abstract
The curing stress is an important parameter affecting the mechanical properties of the cement-treated soil. This paper presents the effects of curing stress on the compressive and physical properties of the cement-treated dredged sediment (CDS). The plasticity behavior of CDS is affected by both the cement content and curing stress, whereas the particle size of CDS is mainly influenced by the cement content. The curing stress can reduce the compressibility of CDS significantly and slightly change the compression behavior of the postyielding stage, which is related to the structural behavior of CDS in the compression process. Finally, the strength factor related to the curing stress and cement content was proposed to predict the strength of CDS.
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Acknowledgments
This research was supported by the National Science Foundation for Distinguished Young Scholars (51625903), the National Natural Science Foundation of China/Hong Kong Research Grants Council Joint Research Scheme (51861165104), the National Natural Science Foundation of China (51609241), and the Youth Innovation Promotion Association CAS (2017376).
Notation
The following symbols are used in this paper:
- A, B, C, a, b
- constant parameters;
- Aw
- cement content in the mixture (%);
- Cc
- compression index at the postyield state;
- Cr
- rebound index at the postyield state;
- Cs
- compression index at the preyield state;
- Cw
- water content of untreated soil (%);
- e*
- void ratio of CDS mixture before loading;
- ef
- void ratio of CDS after curing;
- er
- relative void ratio;
- Gs
- specific gravity of CDS after curing;
- PI
- plasticity index (%);
- p′
- effective vertical stress (kPa);
- p0
- curing stress (kPa);
- pc0
- yield stress of CDS cured in the atmosphere;
- py
- yield stress (kPa);
- qu
- unconfined compression strength (kPa);
- R2
- coefficient of determination;
- r
- strength factor;
- w*
- water content of initial CDS mixture before loading (%);
- wf
- final water content of CDS after curing (%);
- wL
- liquid limit (%);
- wP
- plastic limits (%); and
- ρ*
- density of initial CDS mixture before loading (g/cm3).
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Published In
International Journal of Geomechanics
Volume 20 • Issue 11 • November 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Dec 30, 2019
Accepted: Jul 21, 2020
Published online: Aug 31, 2020
Published in print: Nov 1, 2020
Discussion open until: Jan 31, 2021
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