Sulfate Wastes

Sulfate Wastes

INTRODUCTION:

Sulfate wastes, in particular, fluorogypsum and phosphogypsum, can be used in stabilized base and/or subbase applications. These materials are stabilized using either lime and pozzolanic fly ash, Portland cement, or self-cementing fly ash. The stabilized base material is produced, placed, and compacted in essentially the same manner as other lime-fly ash or cement-stabilized base materials. Stabilized base mixtures containing sulfate wastes have strength development and durability characteristics that are comparable to those of conventional stabilized base materials. Any proposed use of phosphogypsum requires special petition to the EPA to demonstrate that the proposed practices will not result in any adverse health or environmental impacts.(1)


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