Strength Development Behavior of Cement-Treated Mud with Emphasis on Early-Stage Performance
Publication: International Journal of Geomechanics
Volume 23, Issue 9
Abstract
The vacuum preloading combined flocculation and solidification method (VP-FSCM) has been proposed in recent years to increase the efficiency of high-water-content slurries. The characteristic of the strength development of cement-treated mud, especially in the early stage, has significant effects on the consolidation process in the application of the VP-FSCM. An appropriate model for strength development can help decide the design scheme for the combining method to ensure that a high stabilization efficiency of high-water-content slurries is achieved. In this work, laboratory tests are conducted to investigate the strength development of mud with low cement dosage from a very early stage using vane shear tests and unconfined compression tests. After integrating the strengths obtained from the two approaches, the strength development behavior is analyzed, and the offset time is valued by performing a back-analysis using a modified Gallavresi’s equation. It is found that a linear model can be built between the offset time and the water–cement ratio for a series of samples with the same soil type and binder type. Based on the model, the actual and predicted strength values fit well with a correlation coefficient of above 0.998. The model also agrees well with the test data from other literature, thereby testifying to its accuracy. By implementing the proposed model using consolidation theory, the consolidation proceeding time in the combined improvement method is determined.
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Acknowledgments
This work is supported by funding from the National Natural Science Foundation of China (Grant Numbers: 51978303, 51878313, and 52208367) and the China Postdoctoral Science Foundation (Grant Number: 2022M712476).
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Published In
International Journal of Geomechanics
Volume 23 • Issue 9 • September 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Dec 22, 2022
Accepted: Apr 3, 2023
Published online: Jun 27, 2023
Published in print: Sep 1, 2023
Discussion open until: Nov 27, 2023
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