Biobased asphalt rejuvenating emulsion
AssigneeErgon Asphalt & Emulsions, Inc.
InventorsGaylon L. Baumgardner, Paul A. Morris, Joel B. Shealey, William E. Grubba
Life of this patent
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Abstract
A polymer-modified emulsion used for rejuvenating or repairing deteriorated asphalt pavement includes an asphalt phase containing an asphalt and a biobased rejuvenating agent, and an aqueous phase including water and an emulsifying agent, and one or more polymers included in the asphalt phase, the aqueous phase or both.
Claims20
A polymer-modified asphalt rejuvenating emulsion comprising:
- a stable liquid dispersion containing an asphalt phase comprising an asphalt composition and about 0.5% to about 15%, based on a total weight of the emulsion, of at least one biobased rejuvenating agent, the asphalt composition containing an asphalt or blend of asphalts having a penetration grade of at least 50 pen;
- an aqueous phase comprising water and an emulsifying agent;
- and
- one or more polymers included in the asphalt phase, the aqueous phase or both,
- wherein asphalt recovered from the upper 9.5 mm of a pavement having an upper surface treated with the rejuvenating emulsion has a viscosity of about 1,000 to about 3,000 centipoise at 60° C., and a decreased viscosity compared to asphalt recovered from the upper 9.5 mm of a pavement having an upper surface that has not been treated with the rejuvenating emulsion.
A method for rejuvenating deteriorated asphalt, which method comprises:
- a) providing a polymer-modified asphalt emulsion comprising a stable liquid dispersion containing an asphalt phase which includes an asphalt composition and about 0.5% to about 15%, based on a total weight of the emulsion, of at least one biobased rejuvenating agent, the asphalt composition containing an asphalt or blend of asphalts having a penetration grade of at least 50 pen, an aqueous phase which includes water and an emulsifying agent, and one or more polymers included in the asphalt phase, the aqueous phase or both;
- and
- b) applying the asphalt emulsion to a deteriorated asphalt pavement surface wherein asphalt recovered from the upper 9.5 mm of pavement to which the asphalt emulsion has been applied has a viscosity of about 1,000 to about 3,000 centipoise at 60° C., and has a decreased viscosity compared to asphalt recovered from the upper 9.5 mm of pavement to which the asphalt emulsion has not been applied.
A rejuvenated asphalt pavement comprising a polymer-modified asphalt rejuvenating emulsion atop a deteriorated asphalt pavement, the rejuvenating emulsion containing an asphalt phase comprising an asphalt composition and about 0.5% to about 15%, based on a total weight of the emulsion, of at least one biobased rejuvenating agent, the asphalt composition containing an asphalt or blend of asphalts having a penetration grade of at least bout 50 pen, an aqueous phase comprising water and an emulsifying agent, and one or more polymers included in the asphalt phase, the aqueous phase or both, wherein asphalt recovered from the upper 9.5 mm of pavement under the rejuvenating emulsion has a viscosity of about 1,000 to about 3,000 centipoise at 60° C., and has a decreased viscosity compared to asphalt recovered from the upper 9.5 mm of a pavement not under the rejuvenating emulsion.
Dependencies are inferred from the claim text.