Coal-fired power plant aggregates are the portion of the ash rejected by the stack and collected at the base as a waste product. Two aggregates are produced: boiler slag, a glaslike material, and bottom ash, ore commonly called cinders. Approximately 16 percent of the annual ash production is used, and the remainder is disposed of as a waste product. This paper discusses engineering properties of power plant aggregates. Although they behave in many ways as conventional aggregates, they also differ in many ways from conventional aggregates. Consequently, new or modified test methods and specifications are needed before power plant aggregates can be used routinely in highway construction. Both field and laboratory data are given for bituminous mixtures using power plant aggregates. Based on these data and on limited service records, power plant aggregates can be used successfully in bituminous mixtures. Boiler slags are best used as partial replacements in conventional mixtures. Bottom ash is best used "as is" in stabilized base or shoulder construction.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 18-24
  • Monograph Title: Asphalts, aggregates, mixes and stress-absorbing membranes
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00148653
  • Record Type: Publication
  • ISBN: 0309025648
  • Files: TRIS, TRB
  • Created Date: Mar 30 1977 12:00AM