Method for transporting a cementitious mixture to an underground space
AssigneeConversion Systems, Inc.
InventorCharles L. Smith
Life of this patent
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Abstract
A method for transporting a cementitious mixture to an underground space includes subjecting the mixture to high-shear mixing to render it temporarily flowable and, while the mixture remains in its flowable state, transporting the mixture to the underground space. After a period of time following the high-shear mixing, the mixture reverts to its initial viscosity and subsequently reacts to form a cementitiously hardened product. The mixture used in the present invention includes flue gas desulfurization sludge, lime, fly ash and water.
Claims11
A method for transporting a flow resistant mixture of flue-gas desulfurization sludge, fly ash, lime and water into an underground space by:
- subjecting said mixture to high-shear mixing to temporarily render said mixture flowable;
- transporting said mixture, while still in its flowable state, into the underground space;
- and
- after said transporting step, permitting said mixture to react to form a cementitiously hardened product.
A method in accordance with claim 8 wherein said mixture has a viscosity, immediately after subjected to high-shear mixing, of about 25% to 40% of its viscosity immediately after subjected to low-shear mixing.
Dependencies are inferred from the claim text.