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US 6,387,175 B1Granted
Roadway base intermediate, roadway base, and methods of manufacture
AssigneesBethlehem Steel Corporation, Environmental Recycling Technologies, Inc.
InventorsJohn D. Lynn, Leah M. Burge, Douglas J. Koutek, John L. Sullivan
Life of this patent
Estimating the term…
Abstract
A roadway base comprises oily sludge, steelmaking slag fines, and an additive selected from the group consisting of cement, fly ash, asphaltic emulsion, and mixtures thereof
Claims29
A roadway base intermediate, comprising:
- a) oily sludge;
- and
- b) steelmaking slag fines.
A roadway base intermediate, consisting essentially of:
- a) oily sludge;
- and
- b) steelmaking slag fines.
A method of preparing a roadway base intermediate, comprising the steps of:
- a) providing a supply of water-containing oily sludge;
- b) providing a supply of lime-containing steelmaking slag fines;
- c) blending the oily sludge with the steelmaking slag fines;
- and
- d) allowing the blended oily sludge and slag fines to react for a period sufficient to hydrate the lime.
2 more elements
A roadway base, comprising:
- a) oily sludge;
- b) steelmaking slag fines;
- and
- c) an additive selected from the group consisting of cement, fly ash, asphaltic emulsion, and mixtures thereof.
1 more element
The method of preparing a roadway base, comprising the steps of
- a) providing a supply of water-containing oily sludge and a supply of lime-containing steelmaking slag fine.
- b) blending the sludge and slag fines;
- c) allowing the blended sludge and slag fines to cure for a period sufficient to hydrate the lime;
- and
- d) mixing the hydrated blended sludge and slag fines and an additive selected from the group consisting of cement, fly ash, asphaltic emulsion, and mixtures thereof.
2 more elements
Dependencies are inferred from the claim text.