Hostname: page-component-77c89778f8-gq7q9 Total loading time: 0 Render date: 2024-07-17T10:30:06.206Z Has data issue: false hasContentIssue false
  • English
  • Français

Production and Characterization of Fly Ash from New South Wales Coals

Published online by Cambridge University Press:  25 February 2011

Harold Roper ,
Daksh Baweja  and
Graham A. Kirkby
Harold Roper
Affiliation:
School of Civil and Mining Engineering, University of Sydney, N.S.W., Australia, 2006.
Daksh Baweja
Affiliation:
Electricity Commission of New South Wales, Sydney, N.S.W., Australia, 2000.
Graham A. Kirkby
Affiliation:
School of Civil and Mining Engineering, University of Sydney, N.S.W., Australia, 2006.
Get access

Abstract

Factors affecting fly ash characteristics are examined by consideration of the various processes and constituents involved in its production. Coal conversion, boiler-furnace operations and collection procedures are discussed. Current classification schemes applied to fly ash, in particular to those for use as a pozzolanic mineral admixture in concrete are reviewed. The variability of the material is highlighted using physical and chemical data. Shape and size characteristics of selected fly ashes from sources within New South Wales, Australia are illustrated by electron micrographs. The influence of these properties on resultant concrete properties are briefly considered. The formation of nodules of fly ash material on the surface of fabric filters is chosen to illustrate the importance of physical and chemical conditions in the collection chamber, whereas pH changes with time of the water phase in contact with selected fly ashes demonstrate the importance of chemical characteristics of the collected materials. Such chemical characteristics may influence the path of pozzolanic reactions significantly.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 65: Symposium T – Fly Ash and Coal Conversion By-Products II , 1985 , 115
Copyright
Copyright © Materials Research Society 1986

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Graham, J. and Brinkworth, D.C., in Second International Conference on Ash Technology and Marketing (Central Electricity Generation Board, London, U.K., 1984) pp. 23–29.Google Scholar
2. Raask, E., in International Symposium on the Use of PFA in Concrete, edited by Cabrera, J.G. and Cusens, A. (Department of Civil Engineering, Leeds University U.K., 1982) pp. 5–16.Google Scholar
3. Wall, T.F. and Becker, H.B., in Fouling and Slagging from Impurities in Combustion, edited by R.W. O'Brien, (Engineering Foundation, N.Y., 1983) pp. 211–214.Google Scholar
4. Wall, T.F. and Becker, H.B., Total Absorptivities and Emissivities of Particulate Coal Ash from Spectra Bond Emissivity Measurements, Report of the Department of Chemical Engineering, University of Newcastle, Australia, (1984).Google Scholar
5. Potter, J.R., Precipitation or Filtration - A Comparison, Second CSIRO Conference on Electrostatic Precipitation, (Commonwealth Scientific and Industrial Research Organization, Australia, 1983).Google Scholar
6. Durie, R.A., CSIRO Investigation Report No. 72, Australia (1968).Google Scholar
7. Walker, F.H., in Second CSIRO Conference on Electrostatic Precipitation (Commonwealth Scientific and Industrial Research Organization, Australia 1983).Google Scholar
8. Paulson, C.A.J. and Potter, E.C., in Second CSIRO Conference on Electrostatic Precipitation (Commonwealth Scientific and Industrial Research Organization, Australia 1983).Google Scholar
9. Electricity Commission of New South Wales, Proceedings, Electricity Commission of New South Wales Generation Division, Australia (1983).Google Scholar
10. Mehta, P.K., in First International Conference on the Use of Fly Ash, Silica Fume, Slag and other Mineral By-Products in Concrete, edited by Malhotra, V.M. (American Concrete Institute, Detroit, MI, 1983) pp. 1–46.Google Scholar
11. Roper, H., Baweja, D. and Kirkby, G.A., “Investigation of Pulverized Fuel Ash in Concrete”, Report to the Civil and Mining Engineering Foundation, the University of Sydney, Australia (1985).Google Scholar
12. Diamond, S., Cem. Concr. Res., 14, 455–462 (1984).Google Scholar
13. Wilson, H.S. and Burns, J.S., CANMET Report 82-17E, Canada (1982).Google Scholar
14. Meininger, R.C., Concrete International, pp. 52–57, July, 1982.Google Scholar
15. Dhir, R.K., Munday, J.G.L. and Hubbard, F.H., in Second International Conference on Ash Technology and Marketing, (Central Electricity Generation Board, London, U.K., 1984) pp. 329–341Google Scholar
16. Roper, H., Baweja, D. and Kirkby, G.A., in Second International Conference on Ash Technology and Marketing, (Central Electricity Generation Board, London, U.K., 1984) pp. 59–65.Google Scholar