Coal combustion fly ash as construction material in a sanitary landfill project
- VFL Technology Corp., West Chester, PA (United States)
This paper describes a project in which nearly one million tons of Class F fly ash were used as a substitute fill material in place of natural soil during the construction of a new cell at a sanitary landfill in Southern Delaware. Approximately 690,000 cubic yards of subgrade fill material were required to be placed and compacted beneath the liner system of the new cell. An additional 60,000 cubic yards of fill material were required for berm construction. The Delaware Department of Natural Resources and Environmental Control (DNREC), in conjunction with the Delaware Solid Waste Authority (DSWA), approved the substitution of fly ash instead of granular soil as the subgrade fill and berm construction material. Fly ash from different sources was supplied for this project. This paper discusses the basic design of the landfill cell, the engineering properties of the fly ash that led to its acceptance as a select borrow material, the logistical, traffic, and construction considerations associated with the transport and placement of the fly ash, and the relative economics of substituting fly ash for natural soil in this application. The project begin in September of 1995 and was completed in July of 1996. Delivery and placement of fly ash proceeded without incident or difficulty and with no lost construction time due to wet conditions. The new landfill cell was completed within the projected time schedule and resulted in a considerable cost savings to the Delaware Solid Waste Authority
- OSTI ID:
- 353552
- Report Number(s):
- CONF-970677-; TRN: IM9929%%98
- Resource Relation:
- Conference: 90. annual meeting and exhibition of the Air and Waste Management Association, Toronto (Canada), 8-13 Jun 1997; Other Information: PBD: 1997; Related Information: Is Part Of 1997 proceedings of the Air and Waste Management Association`s 90. annual meeting and exhibition; PB: [7000] p.
- Country of Publication:
- United States
- Language:
- English
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