Spatial Distribution of in Biocemented Sandy Slope Using Surface Percolation
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 6
Abstract
The microbial-induced carbonate precipitation (MICP) technique has been increasingly employed for erosion mitigation and stabilization of sandy slopes. Biocementation can improve the strength and stiffness of unsaturated sand. In this study, the performance of a new biogrouting method (i.e., surface percolation) for sandy slopes under unsaturated conditions was investigated. Model-scale laboratory tests were conducted on MICP-treated coastal slopes to assess the erosion resistance to wave actions. The spatial distribution of in the biocemented sandy slope was measured, which can reveal the mechanism and characteristics of biocementaion of sandy slopes. Results show that the slope surface experienced no obvious erosion after the implementation of MICP treatment for four cycles. The lowest degree of saturation was observed at the slope crest, and it increased to the highest value at the slope toe. Similarly, the erosion resistance was also doubled from the slope crest to the slope toe due to flow of water/solution in the slope in the downward direction.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the financial support provided by the National Natural Science Fund of China (No. 51879246), the Young Talent Program of Ocean University of China (No. 841712014), and the Natural Science Fund of Shandong Province, China (No. ZR2019MEE056). This work was also partially supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2019R1A6A1A03033167).
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 6 • June 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Mar 24, 2020
Accepted: Oct 27, 2020
Published online: Apr 1, 2021
Published in print: Jun 1, 2021
Discussion open until: Sep 1, 2021
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