Method and composition, including particular additive for hydraulic cement, for fixing waste matter
AssigneesTakenaka Komuten Co., Ltd., Takenaka Doboku Co., Ltd.
InventorsIchiro Katayama, Hirosuke Kubota, Mitsuo Mochizuki, Kuniyoshi Sakane, Toshimichi Mihara, Tokuzo Kitawaki
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Abstract
Solidification or consolidation, for fixation of various kinds of waste matter, soil etc. containing toxic contaminants affecting ecological system of the environment, by use of composition made up of hydraulic cement and particular additive. The additive essentially contains at least one sulfate, such as aluminum sulfate, alum or iron sulfate, and at least one alkaline metal salt, such as carbonate, bicarbonate or silicate.
Claims21
A method for solidifying or consolidating noxious waste comprising admixing said noxious waste with hydraulic cement, and additive mixture consisting of (A) and (B) wherein:
- (A) is at least one sulfate selected from the group consisting of aluminum sulfate, alum, ferrous sulfate and ferric sulfate;
- (B) is at least one alkaline metal salt selected from the group consisting of alkaline metal carbonate, bicarbonate and silicate;
- water as needed to cause solidification or consolidation of the resulting mixture;
- and
- (A) and (B) being present in an amount substantially corresponding to the mutual stoichio metric proportions.
A composition for solidifying or consolidating noxious wastes consisting of hydraulic cement, and
- (A) at least one sulfate selected from the group consisting of aluminum sulfate, alum, ferrous sulfate and ferric sulfate;
- and
- (B) at least one alkaline metal salt selected from the group consisting of alkaline metal carbonate, bicarbonate and silicate (A) and (B) being present in an amount substantially corresponding to these mutual stoichiometric porportions.
A composition for solidifying or consolidating noxious wastes consisting of
- (A) at least one sulfate selected from the group consisting of aluminum sulfate, alum, ferrous sulfate and ferric sulfate;
- and
- (B) at least one alkaline metal salt selected from the group consisting of alkaline metal carbonate, bicarbonate and silicate, (A) and (B) being present in an amount substantially corresponding to these mutual stoichiometric proporations.
Dependencies are inferred from the claim text.