Experimental Evaluation of Strength Characteristics of Stabilized Dredged Soil
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 5
Abstract
A composite geomaterial (CGM) is developed using dredged soil, bottom ash, cement and air foam. The engineering properties of the CGM are characterized as a function of the content of the various admixtures and the curing time in a laboratory test program. Several series of unconfined compression tests were carried out to characterize the strength and elastic properties of the CGM. Experimental results indicate that the unconfined compressive strength and modulus of CGM are influenced by the content of each component in the mixture. The unconfined compressive strength of CGM increases with an increase in curing time due to the pozzolanic reaction of the bottom ash. The strength after 28 days of curing is found to be approximately 1.5–2.3 times the strength after 7 days of curing, regardless of mix conditions. The bottom ash materials contain nearly 50% siliceous material and 13.9% CaO. With the removal of particles larger than 4.75 mm, a larger surface area is available to react with cement. It is postulated that the increase in shear strength is caused not only by the development of friction at the interface of the mixture components, but also by bond strength is due to the pozzolanic reaction of the bottom ash. Further study is needed, however, to discern aspects related to increase in pozzolanic reaction of bottom ash with the removal of larger size particles. The secant modulus of CGM is in the range of 185–480 times the unconfined compressive strength. The observed general trend is that the stiffness of CGM is greater than that of lightweight soil not containing the bottom ash as a component.
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Acknowledgments
This work was partially supported by the Pukyong National University Research Abroad Fund in 2008 (Grant No. UNSPECIFIEDPS-2008-040).
References
Andrade, L. B., Rocha, J. C., and Cheriaf, M. (2007). “Evaluation of concrete incorporating bottom ash as a natural aggregates replacement.” Waste Manage., 27(9), 1190–1199.
Bouvet, M., François, D., and Schwartz, C. (2007). “Road soil retention of Pb leached from MSWI bottom ash.” Waste Manage., 27(6), 840–849.
Chen, J. S., Chu, P. Y., Chang, J. E., Lu, H. C., Wu, Z. H., and Lin, K. Y. (2008). “Engineering and environmental characterization of municipal solid waste bottom ash as an aggregate substitute utilized for asphalt concrete.” J. Mater. Civ. Eng., 20(6), 432–439.
Churchill, E. V., and Amirkhanian, S. N. (1999). “Coal ash utilization in asphalt concrete mixtures.” J. Mater. Civ. Eng., 11(4), 295–301.
Gabr, M. A., and Bowders, J. J. (2000). “Controlled low-strength material using fly ash and AMD sludge.” J. Hazard. Mater., 76(2–3), 251–263.
Ghafoori, N., and Bucholc, J. (1996). “Investigation of lignite-based bottom ash for structural concrete.” J. Mater. Civ. Eng., 8(3), 128–137.
Kim, B. J., and Prezzi, M. (2008). “Evaluation of the mechanical properties of class-F fly ash.” Waste Manage., 28(3), 649–659.
Kim, B. J., Prezzi, M., and Salgado, R. (2005). “Geotechnical properties of fly and bottom ash mixtures for use in highway embankments.” J. Geotech. Geoenviron. Eng., 131(7), 914–924.
Kim, Y. T., Kim, H. J., and Lee, G. H. (2008). “Mechanical behavior of lightweight soil reinforced with waste fishing net.” Geotext. Geomembr., 26, 512–518.
Kumar, S., and Stewart, J. (2003). “Evaluation of Illinois pulverized coal combustion dry bottom ash for use in geotechnical engineering applications.” J. Energy Eng., 129(2), 42–55.
Otani, J., Mukunoki, T., and Kikuchi, Y. (2002). “Visualization for engineering property of in-situ light weight soils with air foams.” Soils Found., 4(3), 93–105.
Pan, J. R., Huang, C., Kuo, J. J., and Lin, S. H. (2008). “Recycling MSWI bottom and fly ash as raw materials for Portland cement.” Waste Manage., 28(7), 1113–1118.
Sell, N., McIntosh, T., Severance, C., and Peterson, A. (1989). “The agronomic landspreading of coal bottom ash: Using a regulated solid waste as a resource.” Resour. Conserv. Recycl., 2(2), 119–129.
Singh, S. P., Tripathy, D. P., and Ranjith, P. G. (2008). “Performance evaluation of cement stabilized fly ash-GBFS mixes as a highway construction material.” Waste Manage., 28(8), 1331–1337.
Tang, Y. X., Tsuchida, T., Shirai, A., Ogata, H., and Shiozaki, K. (1996). “Triaxial compression characteristics of super geo-material cured underwater.” Proc., 31st Conf. on Geotechnical Engineering, 2493–2494.
Tsuchida, T. (1995). “Super geo-material project in coastal zone.” Proc., Int. Symp. on Ocean Space Utilization COSU ’95, 22–31.
Tsuchida, T., and Egashira, K. (2004). The lightweight treated soil method—New geomaterials for soft ground engineering in coastal areas, Balkema, Rotterdam, The Netherlands.
Tsuchida, T., Fujisaki, H., Makibuchi, M., Shinsha, H., Nagasaka, Y., and Hikosaka, K. (2000). “Use of lightweight treated soils made of waste soil in airport extension project.” J. Constr. Manage. Eng., 644(VI-46), 3–23 (in Japanese).
Tsuchida, T., and Kang, M. S. (2002). “Use of lightweight treated soil method in seaport and airport construction projects.” Proc., Nakase Memorial Symp., Balkema, Rotterdam, The Netherlands, 353–365.
Tsuchida, T., and Kang, M. S. (2003). “Case studies of lightweight treated soil method in seaport and airport construction projects.” Proc., 12th Asian Regional Conf. on Soil Mechanics and Geotechnical Engineering, World Scientific, Singapore, 249–252.
Tsuchida, T., Takeuchi, D., Okumura, T., and Kishida, T. (1996). “Development of lightweight fill from dredging.” Proc., Environmental Geotechnics, Balkema, Rotterdam, The Netherlands, 415–420.
Watabe, Y., Furuno, T., and Tsuchida, T. (2001). “Mechanical properties of dredged soil treated with low quantity of cement.” J. Geotech. Engrg., JSCE 694(III-57), 331–342 (in Japanese).
Watabe, Y., Itou, Y., Kang, M. S., and Tsuchida, T. (2004). “One-dimensional compression of air-foam treated lightweight geomaterial in microscopic point of view.” Soils Found., 44(6), 53–67.
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Received: Nov 13, 2008
Accepted: Oct 1, 2009
Published online: Oct 2, 2009
Published in print: May 2010
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