Fly Ash Utilized in Concrete?Technology Update

by Jamshid Sajadi, Mason-DeVertvil Geotechnical, Services, Columbus, OH, USA,
William J. Head, Mason-DeVertvil Geotechnical, Services, Columbus, OH, USA,

Document Type: Proceeding Paper

Part of: Disposal and Utilization of Electric Utility Wastes


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 | Concrete | Freeze and thaw | Recycling | Cement | Portland cement | Carbon fibers

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