Effect of Fly Ash on the Durability of Air-Entrained Concrete


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Title: Effect of Fly Ash on the Durability of Air-Entrained Concrete

Author(s): S. H. Gebler and P. Klieger

Publication: Special Publication

Volume: 91


Appears on pages(s): 483-520

Keywords: admixtures; air-entrained concretes; chlorides; cold weather construction; concrete durability; corrosion; curing; deicers; fly ash; freeze-thaw durability; mineral admixtures; permeability; pozzolans; scaling+.

Date: 2/1/1986

Concretes containing fly ash were evaluated to establish the effect of the fly ash on freeze-thaw resistance, resistance to deicer scaling, and chloride ion penetration. The effects of low temperature curing and moisture availability during curing were also evaluated. These tests indicated that the freeze-thaw resistance of air-entrained concrete was reduced by the use of certain fly ashes when cured at low temperature. For other conditions there was no significant influence of fly ash . Deicer scaling resistance tests showed that air-entrained concrete without fly ash generally performed somewhat better than concrete with fly ash, regardless of the type of curing provided. Air-entrained concretes made with some fly ashes were as resistant to chloride ion penetration as air-entrained concrete without fly ash. The class of fly ash did not significantly influence the degree of chloride ion penetration.