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Construction Of Highway Base And Subbase Layers Containing Residue From An Atmospheric Fluidized Bed Combustion Process, David Q. Hunsucker, R. Clark Graves

Kentucky Transportation Center Research Report

This report summarizes findings of laboratory and construction evaluations of using residue from an atmospheric fluidized bed combustion (AFBC) process as a component in an experimental road base and subbase application. The base mixture contains pulverized fuel ash, AFBC residue, and limestone aggregates used as bulk filler. The subbase mixture contains AFBC residue and pond ash (ponded fly ash and bottom ash). Mixtures containing various proportions of each component were evaluated in the laboratory relative to maximum dry density, optimum moisture content, and compressive strength development.

Two 750-foot test sections of a 22-foot wide roadway, containing the experimental mixtures, were …