Process for cold-in-place recycling using foamed asphalt and lubrication additive
AssigneesA.L.M. Holding Company, Ergon Asphalt & Emulsions, Inc.
InventorsGerald H. Reinke, David Lange, Gaylon L. Baumgardner, Ervin Dukatz
Life of this patent
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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 using a foamed asphalt binder, the method comprising the steps of:
- combining water and a lubricating surfactant, and optionally compressed air, with an asphalt binder heated to a reduced temperature of about 300° F. to about 380° F. to provide a foamed asphalt binder;
- and
- combining milled bituminous material with the foamed asphalt binder to provide a coated cold-in-place recycled paving material;
- and
- compacting the coated cold-in-place recycled paving material.
A cold-in-place asphalt recycling method for paving a recycled asphalt pavement surface, which method comprises:
- producing a foamed asphalt binder by injecting water and a lubricating surfactant and optionally compressed air into a stream of an asphalt binder at a reduced temperature of about 300° F. to about 380° F.;
- milling an existing pavement surface to provide milled bituminous material;
- 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.
Dependencies are inferred from the claim text.