Published: Jan 1994
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This writer is much indebted to E. C. Higginson  who prepared the effort on this chapter on mineral admixtures in 1966 and to L. H. Tuthill  who wrote the chapter in ASTM STP 169B in 1978. Their work provides the background for this version. I have borrowed from their ideas and specific words. However, this chapter will present less discussion of the use of mineral admixtures in concrete and more on the characteristics of the mineral admixtures and the significance and use of their acceptance tests. For discussion of the use of mineral admixtures, the reader is referred to two reports from former Committee 226 on Admixtures for Concrete of the American Concrete Institute (ACI). These reports, ACI226.1R-87 “Ground Granulated Blast-Furnace Slag as a Cementitious Constituent of Concrete”  and ACI 226.3R-87 “Use of Fly Ash in Concrete”  were published in 1987. Updated reports on these two materials are currently being prepared by ACI Committees 233 and 232, respectively. Donald W. Lewis also made significant contributions with information and comments on the section in this chapter on slag. This chapter will deal with the following mineral admixtures: fly ash, natural pozzolans, ground granulated blast-furnace slag, and silica fume.
Board chairmanchairman, American Fly Ash Company, Naperville, IL