Title:
Specifying Fly Ash for Durable Concrete
Author(s):
Roy H. Keck and Eugene H. Riggs
Publication:
Concrete International
Volume:
19
Issue:
4
Appears on pages(s):
35-38
Keywords:
alkali aggregate reactions; corrosion resistance; durability; fly ash;
heat of hydration; permeability;
DOI:
Date:
4/1/1997
Abstract:
A discussion of the benefits that the addition of Class C and Class F fly ash provides for concrete begins with the issue of durability. Among the advantages related to durability are: reduced permeability, resistance to alkali-silica reaction and sulfates, increased corrosion protection, and reduced heat of hydration. Observations on the approaches regarding the use of fly ash in mix designs are summarized. A review of the specifications used by the Departments of Transportation of several Southern states indicates how the addition of fly ash has evolved.