The Use of High Volume Fly Ash in Concrete

This paper presents data from durability studies of concretes containing up to 60% fly ash; studies include carbonation chloride resistance permeability and strength. Data are also presented from a recent construction project in Toronto where high-volume fly ash concrete was used as part of a “Green Building Strategy”. Finally the paper presents recent data from studies using ternary blends of cement with high levels of fly ash -e.g. 56%- and small levels of silica fume -3 to 4%- . It is shown that the poor early-age performance that may be associated with high-volume fly ash can be offset by the inclusion of silica fume.

Technical Report Author: M.D.A. Thomas, D.S. Hopkins, Gurinder Girn, Robert Munro, Ernese Muhl