Hydraulic Properties of Sluiced Coal Combustion Products Disposed in Impoundments
Publication: Geo-Congress 2022
ABSTRACT
Hydraulic properties were measured on twelve undisturbed specimens of sluiced coal combustion products (CCPs) collected in thin-wall sampling tubes from two CCP impoundments undergoing closure. The saturated hydraulic conductivity (Ks) and soil-water characteristic curve (SWCC) were measured for each specimen. Saturated hydraulic conductivity of the CCPs varied from 10–8 to 10–5 m/s, with lower hydraulic conductivity (Ks < 10–6 m/s) obtained for CCPs with higher fines content. The van Genuchten α parameter for the SWCC varied directly with saturated hydraulic conductivity and was inversely related to van Genuchten’s n. Consistent sets of hydraulic properties corresponding to more permeable (Ks = 10–6 m/s), typical (Ks = 10–7 m/s), and less permeable (Ks = 10–8 m/s) CCPs are suggested for use in variably saturated flow modeling of CCP impoundments for which site-specific data are not available.
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REFERENCES
ASTM. (2021). Annual Book of Standards, ASTM International, West Conshohocken, PA.
Basantis, A. (2021). Characterizing Hydraulic Properties of Coal Combustion Products (CCPs) in sluiced CCP basins, MS Thesis, University of Virginia, Charlottesville, VA.
Benson, C. (2021). Water flow in coal combustion products and drainage of free water, Electric Power Research Institute, Palo Alto, CA.
Benson, C., and Benavides, M. (2018). Geochemical assessment of long-term leachate quality and impacts of wastewater management practices at coal combustion product (CCP) storage facilities., School of Engineering, University of Virginia.
Benson, C., and Gurdal, T. (2013). Hydrologic properties of final cover soils. Foundation Engineering in the Face of Uncertainty, GSP No. 229, ASCE, Reston, VA, 403–413.
Clark, D., Walsh, T., Niemiec, J., and Jacoby, B. (2015). Groundwater modeling and settlement analysis for closure of the Little Blue Run CCP disposal area. World of Coal Ash, American Coal Ash Assoc. and U. Kentucky Center for Applied Energy Research, Lexington, KY.
Dumenu, L., Pando, M., Ogunro, V., Daniels, J., Moid, M., and Rodriguez, C. (2017). Water retention characteristics of compacted coal combustion residuals. Geotechnical Frontiers 2017: Waste Containment, Barriers, Remediation, and Sustainable Geoengineering, GSP 276, ASCE, Reston, VA, 403–413.
EPRI. (2012). Geotechnical properties of fly ash and potential for static liquefaction., Electric Power Research Institute, Palo Alto, CA.
Federal Register. (2015). Hazardous and solid waste management system; Disposal of coal combustion residuals from electric utilities. Final rule. Federal Register, 80(74), 21302–21501.
Jakka, R., Ramana, G., and Datta, M. (2010). Shear behavior of loose and compacted pond ash. Geotechnical and Geological Engineering, 28(6), 763–778.
Kaniraj, S., and Gayathri, V. (2004). Permeability and consolidation characteristics of compacted fly ash. J. Energy Engineering, 130 (1), 18–43.
Khire, M., Saghaei, B., and Grohol, B. (2020). Saturated and unsaturated hydraulic properties of ponded coal ash. GeoCongress 2020: Geo-Systems, Sustainability, Geoenvironmental Engineering, and Unsaturated Soil Mechanics, GSP 319, ASCE, Reston, VA, 430–438.
Khire, M., Saghaei, B., Daniels, J., and Langley, W. (2017). Water balance of coal ash ponds. Geotechnical Frontiers 2017: Waste Containment, Barriers, Remediation, and Sustainable Geoengineering, GSP 276, ASCE, Reston, VA, 397–402.
Mitchell, J., and Soga, K. (1993). Fundamentals of soil behavior, 2nd Ed., Wiley, New York.
van Genuchten, M. (1980). A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J., 44(5), 892–898.
Wang, X., and Benson, C. (2004). Leak-free pressure plate extractor for measuring the soil water characteristic curve. Geotech. Testing J., 27(2), 163–172.
Webb, R., Stormont, J., Stone, M., and Thomson, B. (2014). Characterizing the unsaturated and saturated hydraulic properties of coal combustion by-products in landfills of northwestern New Mexico. J. Am. Soc. of Mining and Reclamation, 3(1), 70–99.
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Geo-Congress 2022
Pages: 505 - 513
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© 2020 ASCE.
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Published online: Mar 17, 2022
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