Dewatering performance of fiber-reinforced fly ash slurry

Dogan Cetin, Tayfun Sengul, Mahmoud M. Khachan, Shobha K Bhatia, Sheryl O. Owen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Coal-based thermal power plants are the main source of power generation in many industrialized countries. Consequently, management of the considerable quantities of fly ash and other coal combustion residuals is of great importance with wet-storage impoundments being themost common storage option. Although the beneficial reuse of fly ash is increasing worldwide, the problems associated with diminishing impoundments capacities and possible negative impact of fly ash on environment is subsequently becoming a major concern. Legislation is proposed in the US to close or line all existing impoundments. Each of these progressions necessitates an increase in dewatering and transport of wet-disposal fly ash. Recently, geotextile tubes have been used to efficiently and economically dewater a number of low percent-solids sediments, by-products, and wastes. To investigate the effectiveness of geotextile tubes for dewatering hydraulically transported fly ash slurry a number of laboratory studies were conducted. The dewatering behavior of fly ash was evaluated with and without mixing with randomly dispersed waste fibers. The effect of anionic polyacrylamide flocculant on the dewatering performance was also evaluated. Results indicate that geotextile tubes can be effectively used for dewatering flocculated fly ash slurries, and that the strength of retained fly ash can be improved by adding fibers.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
PublisherAmerican Society of Civil Engineers (ASCE)
Pages98-107
Number of pages10
Edition243 GSP
ISBN (Print)9780784413456
DOIs
StatePublished - 2014
Event2014 GeoShanghai International Congress: New Frontiers in GeoTechnical Engineering - Shanghai, China
Duration: May 26 2014May 28 2014

Other

Other2014 GeoShanghai International Congress: New Frontiers in GeoTechnical Engineering
CountryChina
CityShanghai
Period5/26/145/28/14

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ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Building and Construction
  • Architecture

Cite this

Cetin, D., Sengul, T., Khachan, M. M., Bhatia, S. K., & Owen, S. O. (2014). Dewatering performance of fiber-reinforced fly ash slurry. In Geotechnical Special Publication (243 GSP ed., pp. 98-107). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784413456.011