Study on the early strength characteristics and source mechanism of solidified dredged marine sediment based on moisture transformation
Haoqing Xu
A B * , Songyu Liu A , Yaxiong Gan C , Pengming Jiang B D , Aizhao Zhou B and Yongzheng Qi B
A School of Transportation, Southeast University, Nanjing, 210096, PR China.
B Jiangsu Province Engineering Research Center of Geoenvironmental Disaster Prevention and Remediation of School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212100, PR China.
C China Railway Construction Suzhou Design and Research Institute Co. Ltd, Suzhou, 215004, PR China.
D College of Civil Engineering, Suzhou University of Science and Technology, Suzhou, 215009, PR China.
Marine and Freshwater Research - https://doi.org/10.1071/MF22166
Submitted: 15 August 2022 Accepted: 24 February 2023 Published online: 20 March 2023
© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing
Abstract
Context: Large land areas are occupied by dredged sediments with which the strength of the solidified soil develops slowly, and this has become an instant problem in geotechnical engineering.
Aims: This study was designed to investigate the performance of solidified dredged deposits treated by sulfoaluminate cement for sludge solidification, and whether the mechanism for early strength development is based on water transfer.
Methods: With sediments dredged from Dalian Bay as the research objects, the strength, deformation and amount of moisture transferred by the solidified sludge were measured and analysed and referred to the data for Portland cement.
Key results: Sulfate aluminium cement is characterised by great early strength.
Conclusion: The mechanism for early strength development relies on reactions that form crystalline calcium vanadium stone.
Implications: Our study showed that calcium vanadium stone plays a critical role in early strength development, and this was measured quantitatively for the mineral water form.
Keywords: dredging, early strength, forming mechanism, marine sediment, moisture transformation, solidification, solidified soil, strength development.
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