Stabilization Of FGD Byproduct Using Fly Ash

Fixated or stabilized flue gas desulfurization (FGD) scrubber material can be used as a stabilized base or subbase material in the same manner as lime-fly ash or cement-stabilized base materials.  Fixated FGD scrubber material may be used in an “as produced” condition, provided the material meets specifications, or the FGD scrubbermaterial can be modified with additional reagents such as Portland cement, lime, fly ash,etc. to improve characteristics. In addition to adding fixation reagents, an aggregate material (sometimes coal bottom ash) can be blended with the fixated FGD scrubbermaterial to improve material performance.  Properly designed fixated FGD scrubbermaterial has comparable strength development and durability characteristics to that of conventional stabilized base materials.

More information may be found in the following file:

FGD-study-report

Summary