Abstract A hardenable cementitious mixture comprised of lime, fly ash, and sulfite salts in predetermined portions may be produced from a combination of the fly ash product from combustion equipment and the slurry produced in scrubbing stack gases from such equipment to remove sulfur oxides therefrom. Generally, the cementitious mixture comprises a water solids mixture with about 30 - 90 weight percent solids. Further, the solids comprise 0.25 - 70 percent by weight alkaline earth metal hydroxide, 10 - 99.5 weight percent fly ash, and 0.25 - 70 percent by weight of alkaline earth metal sulfite of which some portion thereof may be replaced by alkaline earth metal sulfates. This cementitious mixture may be used either by itself or with a filler or aggregate material.
The cementitious mixture of claim 1, wherein said solids content is 30 - 60 weight percent of said suspension.
Claim 2
Dependent Claim
19 words
The cementitious mixture of claim 1, wherein said solids content is 50 - 90 weight percent of said suspension.
Claim 3
Dependent Claim
17 words
The cementitious mixture of claim 1, wherein said alkaline earth metal hydroxides consist essentially of calcium hydroxide.
Claim 4
Dependent Claim
28 words
The cementitious mixture of claim 1, wherein said alkaline earth metal hydroxides consist essentially of calcium hydroxide and said alkaline earth metal sulfite consists essentially of calcium sulfite.
Claim 5
Dependent Claim
13 words
Hardenable material consisting of the cementitious mixture of claim 1 admixed with aggregate.