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US 8,962,071 B2Granted
Process for cold-in-place recycling using foamed asphalt and lubrication additive
AssigneeA.L.M. Holding Company
InventorsGerald H. Reinke, David Lange, Gaylon L. Baumgardner, Ervin Dukatz
Life of this patent
Estimating the term…
Abstract
Cold-in-place asphalt recycling is disclosed. A foamed asphalt may be produced by injecting water and optionally compressed air into a hot asphalt stream. A lubricating surfactant may be added to the hot asphalt stream to improve performance. The foamed asphalt may be mixed with reclaimed material to provide a uniformly coated paving material that can compacted to a desired density.
Claims20
A cold-in-place asphalt recycling method, which method comprises:
- milling an existing pavement surface to a desired depth to provide milled bituminous material on-site;
- combining the milled bituminous material with a foamed asphalt binder formed from a lubricating cationic surfactant in an amount of about 0.05 to about 3 weight percent of the foamed asphalt binder, water, and liquid asphalt binder heated to a temperature sufficient to produce the foamed asphalt binder, to produce a paving material on-site;
- and
- compacting the paving material on-site to provide a recycled pavement surface.
1 more element
A cold-in-place asphalt recycling method to prepare a recycled asphalt pavement surface, which method comprises:
- producing a foamed asphalt binder by combining about 0.5 to about 5 weight percent water and about 0.05 to about 3 weight percent lubricating cationic surfactant, and optionally compressed air, with a liquid asphalt binder heated to a temperature greater than about 300° F. to provide a foamed asphalt binder;
- in a continuous mixing process, milling an existing pavement surface to provide milled bituminous material and combining the foamed asphalt binder with the milled bituminous material to produce a recycled bituminous mix;
- conveying the recycled bituminous mix into a paver;
- laying the recycled bituminous mix onto an existing grade;
- and
- compacting the recycled bituminous mix to form a recycled asphalt pavement surface.
3 more elements
Dependencies are inferred from the claim text.