Fly Ash Utilized in Concrete—Technology Updateby Jamshid Sajadi, Mason-DeVertvil Geotechnical, Services, Columbus, OH, USA,
William J. Head, Mason-DeVertvil Geotechnical, Services, Columbus, OH, USA,
Abstract: Fly ash is frequently utilized as a pozzolanic substance in Portland cement concrete. Levels of such utilization, a reflection of current practice/technology, seem to have stabilized at about 15 to 25 percent replacement of cement by fly ash. Results of recent work in ash utilization indicate that such guidelines no longer necessarily apply. Concretes with very high fly ash contents and concretes incorporating high carbon content fly ash may be feasible, economical, and durable with respect to freezing and thawing.
Subject Headings: Fly ash | Recycling | Carbon fibers | Freeze and thaw | Portland cement
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