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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: High Content of Fly Ash (Class F) in Extruded
Author(s): Alva Peled, Michele F. Cyr, and Surendra P. Shah
Publication: Materials Journal
Appears on pages(s): 509-517
Keywords: durability; fly ash; rheology
Abstract:This paper presents mechanical properties and durability of extruded fiber-reinforced cement composites that contain a high percentage of Class F fly ash. The fly ash was examined as a replacement for cement in a plain cement matrix and composites containing polyvinyl alcohol (PVA), glass, acrylic (PAN), polypropylene (PP), or cellulose fibers. Accelerated aging was used to study the effect of fly ash on the durability of the different systems. It is shown that fly ash improves the flexural performance of the extruded composite. The extent of this improvement varies with fiber type. PAN, glass, and cellulose fibers were most affected by the use of fly ash. The greatest improvement in both flexural strength and ductility was obtained for 28-day moist-cured com-posites containing PAN fibers when as much as 70%, by volume, of the cement was replaced with fly ash. In this case, a five-fold increase in toughness and an approximately 20% improvement in strength were observed for steam-cured composites.
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