A Study of Consolidation Tests on Dredged Soils with a Large Moisture Content in Coastal Louisiana Using a Modified Odometer
Publication: Geo-Congress 2023
ABSTRACT
This paper reports a comparative study of the consolidation behavior of dredged soils by using a standard conventional odometer and a modified conventional odometer. A series of tests were carried out on the dredged soil samples from the Louisiana coastal area. Dredged soils are soft and highly moisturized, and thus form a large strain consolidation settlement. For this reason, the seating load, which is the initially applied load at the consolidation test, is an essential factor for the consolidation test of slurry-type dredged soils. The conventional odometer comes up with a large seating pressure of 0.01 TSF (1 TSF = 107.25 kPa), which would squeeze part of the soft slurry sample out of the odometer cell if the initial moisture content is greater than 70%. Utilizing 3D printing technology, the dial cap was printed out using material polylactic acid (PLA). Then, the seating pressure has been significantly reduced, and the newly achieved seating load turned out to be 0.002 TSF, including the porous stone weight. With the 3D-printed dial cap, dredged soil samples with a moisture content up to 100% could be successfully tested. The laboratory test results of the consolidation properties of Louisiana dredged soils are presented in this study. The results suggest that the modified consolidation apparatus can be used to obtain a reliable relationship between void ratio and effective stress for materials with high initial void ratios.
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REFERENCES
Apu, O. S., and Wang, J. X. (n.d.). Assessment of Compression Index (cc) of Louisiana Marsh Soils by Considering the Sedimentation State. Geo-Congress 2022, 131–140.
Apu, O. S., Wang, J. X., ad Sarker, D. (2021). Evolution of Large-Strain One-Dimensional Consolidation Test for Louisiana Marsh Soil. In IFCEE 2021 (pp. 244–255).
ASTM. (2016). Standard Test Methods for Specific Gravity of Soil Solids by Water PycnometerNo Title. ASTM. doi: https://doi.org/10.1520/D0854-14.
ASTM. (2018). Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils. ASTM. doi: https://doi.org/10.1520/D4318-17.
ASTM. (2019). Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass. ASTM. doi: https://doi.org/10.1520/D2216-19.
ASTM. (1996). Standard test method for one-dimensional consolidation properties of soils.
Azimi, A. (2018). Laboratory Self-Weight Consolidation Testing of Dredged Material Analyzed Using a One-Dimensional Finite Strain Consolidation Method. Master of Science in Civil Engineering Theses., Kennesaw State University, GA,htps://digitalcommons.kennesaw.edu/msce_etd/2.
Carraro, J. A. H., Bandini, P., and Salgado, R. (2003). Liquefaction resistance of clean and nonplastic silty sands based on cone penetration resistance. Journal of Geotechnical and Geoenvironmental Engineering, 129(11), 965–976.
CPRA (Coastal Protection and Restaration Authority). (2017). Geotechnical Standards Marsh Creation and Coastal Restoration Projects. Coastal Protection and Restaration Authority of Louisiana.1–45.
Gibson, R. E., Schiffman, R. L., and Cargill, K. W. (1981). The theory of one-dimensional consolidation of saturated clays. II. Finite nonlinear consolidation of thick homogeneous layers. Canadian Geotechnical Journal, 18(2), 280–293.
Holtz, R. D. (1972). Long-term loading tests at Ska-Edeby, Sweden. Proceedings ASCE Specialty Conference on Earth and Earth Supported Structures, 435–464.
Howard, A. K. (1984). The revised ASTM standard on the unified classification system. Geotechnical Testing Journal, 7(4), 216–222.
Imai, G. (1978). Fundamental studies on one-dimensional consolidation characteristics of fluid mud. Doctoral Dissertation, University of Tokyo (in Japanese).
Lay, M., Thajudin, N. L. N., Hamid, Z. A. A., Rusli, A., Abdullah, M. K., and Shuib, R. K. (2019). Comparison of physical and mechanical properties of PLA, ABS and nylon 6 fabricated using fused deposition modeling and injection molding. Composites Part B: Engineering, 176, 107341.
Li, L., Alvarez, I. C., and Aubertin, J. D. (2013). Self-weight consolidation of slurried deposition: tests and interpretation. International Journal of Geotechnical Engineering, 7(2), 205–213.
Mikasa, M. (1963). The consolidation of soft clay-a new consolidation theory and its application.
Moozhikkal, R., Sridhar, G., and Robinson, R. G. (2019). Constant rate of strain consolidation test using conventional fixed ring consolidation cell. Indian Geotechnical Journal, 49(2), 141–150.
Sarker, D., Shahrear Apu, O., Kumar, N., Wang, J. X., and Lynam, J. G. (2021). Application of sustainable lignin stabilized expansive soils in highway subgrade. In IFCEE 2021 (pp. 336–348).
Thevanayagam, S., Martin, G. R., Shenthan, T., and Liang, J. (2001). Post-liquefaction pore pressure dissipation and densification in silty soils.
Torres, J., Cotelo, J., Karl, J., and Gordon, A. P. (2015). Mechanical property optimization of FDM PLA in shear with multiple objectives. Jom, 67(5), 1183–1193.
Umehara, Y. (1975). Determination of consolidation constants for very soft clay. Report of The Port and Harbour Research Institute, 14(4), 45–65.
Umehara, Y., and Zen, K. (1980). Constant rate of strain consolidation for very soft clayey soils. Soils and Foundations, 20(2), 79–95.
USACE. (1970). Laboratory soils testing. EM 1110-2–1906. Washington, DC: US Army Corps of Engineers.
USACE. (1987). Confined disposal of dredged material.EM 1110-2-5027. Washington, DC: US Army Corps of Engineers.
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Geo-Congress 2023
Pages: 331 - 340
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Published online: Mar 23, 2023
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