Recovery, processing, and usage of wet-stored fly ash

Research output: Chapter in Book/Report/Conference proceedingChapter

11 Citations (Scopus)

Abstract

With changes in how electricity is generated, there may be a gradual reduction in available fly ash for use in concrete and other applications. The significant quantities of fly ash stored around power plants in stockpiles and ponds, in some cases over many years, represent a source of material that could help address this situation. Wet-stored fly ash can undergo physical and chemical changes during storage, affecting its reactivity potential and it may be prone to variability. Recovery of this is therefore likely to involve evaluation of the material properties, and development of processing strategies. This chapter examines (i) the characteristics of wet-stored fly ash, (ii) methods of sampling material, (iii) various wet processing techniques that can be used to remove or concentrate components, and (iv) use in cementitious systems. Consideration is also given to the direct use of conditioned/stockpile fly ash in concrete.

Original languageEnglish
Title of host publicationCoal Combustion Products (CCPs)
Subtitle of host publicationCharacteristics, Utilization and Beneficiation
PublisherElsevier
Chapter14
Pages343-367
Number of pages25
ISBN (Electronic)9780081010471
ISBN (Print)9780081009451
DOIs
Publication statusPublished - 3 May 2017

Keywords

  • Classification
  • Froth flotation
  • Magnetic separation
  • Material properties
  • Other methods
  • Performance in concrete
  • Pond
  • Screening
  • Stockpile
  • Wet-storage effects

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