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US 12,163,294 B2Granted
Sterol additive in asphalt pavement
AssigneesA.I.M. Holding Company, Ergon Asphalt & Emulsions, Inc.
InventorsGerald H. Reinke, Gaylon L. Baumgardner, Andrew Hanz
Life of this patent
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Abstract
Pavement aging can be reduced by applying to an asphalt-containing pavement a topcoat layer or a surface treatment containing asphalt binder with sterols.
Claims19
A method of treating an existing, aged asphalt-containing pavement comprising:
- providing a sterol-containing asphalt binder composition comprising an asphalt binder component and a sterol additive, wherein the sterol-containing asphalt binder composition comprises from 0.5 to 15 wt. % of the sterol additive based on the asphalt binder component;
- combining the sterol-containing asphalt binder composition with aggregate to form an asphalt coating material;
- applying the asphalt coating material atop the existing, aged asphalt pavement;
- and
- compacting the applied asphalt coating material to form a coated asphalt pavement having a sterol-containing topcoat layer.
2 more elements
Dependencies are inferred from the claim text.