Using FBC and Stoker Ashes as Roadway Fill: A Case Study
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 124, Issue 11
Abstract
Approximately 100,000 m3 of atmospheric fluidized bed combustion (FBC) ash and stoker ash were used as structural fill in the construction of a large roadway embankment. The embankment is ∼200 m long and 10 m high, and it supports an extension of a street across a gravel quarry in West Lafayette, Ind. The use of coal combustion by-products on this project was motivated by the need to find cost-effective alternatives to the disposal of these materials in solid-waste landfills. Similar projects have been completed using the more common bottom ash and fly ash. However, little information is available related to the performance of FBC and stoker ashes in this application. An overview of the project and construction operations is described, and the results of geotechnical laboratory tests and field monitoring are presented. Instruments used in the monitoring of fill behavior include settlement plates, vertical and horizontal inclinometers, seismic cross-hole tests, and postconstruction standard penetration tests. The compacted FBC material exhibited significant swell stresses and strains and is still expanding 2 years after construction.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
American Coal Ash Association, (1993). “Coal combustion byproduct (CCB) production & use: 1966–1993.”Rep. for Coal-Burning Electric Utilities in the United States, Alexandria, Va. 68.
2.
Chan, H. T. (1985). “Stability study of nanticoke ash dykes.”Rep. No. 85-303-K, Ontario Hydro Res. Div., ON, Canada.
3.
Cragg, C. B. (1979). “Booth quarry trial fly ash embankment.”Rep. No. 79-402-K, Ontario Hydro Res. Div., ON, Canada.
4.
Deschamps, R. S. (1997). “Geotechnical and Environmental Characteristics of Atmospheric Fluidized Bed Combustion Ash and Stoker Ash,”Transportation Research Record No. 1577, Transportation Research Board, 90–95.
5.
DiGioia, A. M., and Jr., and Nuzzo(1972). “Fly ash as structural fill.”J. Power Div., ASCE, 98(1), 77–92.
6.
GAI Consultants, Inc. (1993). “Use of coal combustion by-products in highway construction.”Rep. Prepared for General Assembly of Indiana and the Indiana Dept. of Transp., Fort Wayne, Ind. 155.
7.
Huang, W. H., and Lovell, C. W. (1993). “Use of bottom ashes and slags in highway construction.”Proc., 4th Int. Symp. on the Reclamation, Treatment and Utilization of Coal Mining Waste, Vol. 1, 359– 368.
8.
Leonards, G. A., and Bailey, B.(1982). “Pulverized coal ash as structural fill.”J. Geotech. Engrg. Div., ASCE, 108(4), 517–531.
9.
Meyerhof, G. G.(1965). “Shallow foundations,”J. Soil Mech. and Found. Engrg., ASCE, 91(2), 21–31.
10.
Moulton, L. K., Seals, R. K., and Anderson, D. A. (1973). “Utilization of ash from coal-burning power plants in highway construction.”Hwy. Res. Rec. 430, Transportation Research Board, 26–39.
11.
Seals, R. K., Moulton, L. K., and Ruth, B. E.(1972). “Bottom ash: An engineering material.”J. Soil Mech. and Found. Div., ASCE, 98(4), 311–325.
12.
Sikes, P. G., and Kolbeck, H. J.(1973). “Disposal and uses of power plant ash in urban area.”J. Power Div., ASCE, 99(1), 217–234.
13.
Toth, P. S., Chan, H. T., and Cragg, C. B.(1988). “Coal ash as structural fill, with special reference to Ontario experience.”Can. Geotech. J., Ottawa, Canada, 25, 694–704.
Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 124 • Issue 11 • November 1998
Pages: 1120 - 1127
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Nov 1, 1998
Published in print: Nov 1998
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.