Characteristics of low-lime fly ashes significant to their use in concrete

Ravindra K. Dhir, Frederick H. Hubbard, John G.L. Munday, M. Roderick Jones

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

Abstract

The results of studies undertaken into the compositional and physical characteristics of a wide spectrum of UK fly ashes, and some from overseas, are examined in conjunction with data available from the literature. No direct relationship was found to exist between the compositional nature of a fly ash and its behaviour in concrete. The single most significant physical parameter characterising ash is shown to be fineness (as measured by 45 um sieve retention) and is used in developing two schemes classifying (a) the water-reducing and (b) the cementsaving abilities of an ash, which give a simple measure of ash suitability for use in concrete. It is demonstrated that for a correctly designed concrete, the grade of ash does not significantly affect its engineering properties, but only the cement savings that can be achieved.

Original languageEnglish
Title of host publicationFly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete
Subtitle of host publicationProceedings Second International Conference Madrid, Spain 1986/Sp-91
PublisherAmerican Concrete Institute
Pages693-721
Number of pages29
VolumeSP-091
ISBN (Electronic)9780870317200
Publication statusPublished - 1 Feb 1986
Event2nd International Conference on the Use of Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete 1986 - Madrid, Spain
Duration: 21 Apr 1986 → …

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-091
ISSN (Print)0193-2527

Conference

Conference2nd International Conference on the Use of Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete 1986
Country/TerritorySpain
CityMadrid
Period21/04/86 → …

Keywords

  • Cement content
  • Chemical analysis
  • Concretes
  • Fineness
  • Fly ash
  • Mechanical properties
  • Physical properties
  • Water content
  • Workability

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