PAVEMENT REPAIR SYSTEM UTILIZING SOLID PHASE AUTOREGENERATIVE COHESION
First Claim
1. A method for repairing an asphalt pavement, comprising:
- preparing a surface of a damaged asphalt pavement comprising aged asphalt by filling in deviations from a uniform surface plane with dry aggregate and compacting the dry aggregate;
applying a reactive asphalt emulsion to the prepared surface, whereby the reactive emulsion penetrates into cracks and crevices in the damaged asphalt pavement and into areas filled with the dry aggregate, wherein the reactive asphalt emulsion comprises butyl rubber, a diene modified asphalt, and an environmentally hardened bioresin, and wherein the reactive asphalt emulsion contains less than 1% perflurocarbons as volatile components; and
passing an emitter over the prepared pavement, wherein the emitter radiates terahertz energy into the pavement to a depth of at least 2 inches, wherein a temperature differential throughout a top two inches of pavement is 100°
F. or less, wherein a highest temperature in the top two inches of pavement does not exceed 300°
F., and wherein a minimum temperature in the top two inches of pavement is at least 200°
F., whereby voids and interstices in the damaged pavement are disturbed without dehydrogenation of the asphalt, and whereby oligomers present in the aged asphalt are linked together into longer polymer chains, whereby ductility of the aged asphalt is improved.
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Accused Products
Abstract
A pavement repair system is provided utilizing Solid Phase Auto Regenerative Cohesion (SPARC) Homogenization by Liquid Asphalt Oligopolymerization (HALO) technologies. The SPARC-HALO system is suitable for use in repairing asphalt pavement, including pavement exhibiting a high degree of deterioration (as manifested in the presence of potholes, cracks, ruts, or the like) as well as pavement that has been subject to previous repair and may comprise a substantial amount of dirt and other debris (e.g., chipped road paint or other damaged or disturbed surfacing materials). The HALO system is suitable for rejuvenating aged asphalt, thereby improving properties of the paving material.
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Citations
11 Claims
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1. A method for repairing an asphalt pavement, comprising:
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preparing a surface of a damaged asphalt pavement comprising aged asphalt by filling in deviations from a uniform surface plane with dry aggregate and compacting the dry aggregate; applying a reactive asphalt emulsion to the prepared surface, whereby the reactive emulsion penetrates into cracks and crevices in the damaged asphalt pavement and into areas filled with the dry aggregate, wherein the reactive asphalt emulsion comprises butyl rubber, a diene modified asphalt, and an environmentally hardened bioresin, and wherein the reactive asphalt emulsion contains less than 1% perflurocarbons as volatile components; and passing an emitter over the prepared pavement, wherein the emitter radiates terahertz energy into the pavement to a depth of at least 2 inches, wherein a temperature differential throughout a top two inches of pavement is 100°
F. or less, wherein a highest temperature in the top two inches of pavement does not exceed 300°
F., and wherein a minimum temperature in the top two inches of pavement is at least 200°
F., whereby voids and interstices in the damaged pavement are disturbed without dehydrogenation of the asphalt, and whereby oligomers present in the aged asphalt are linked together into longer polymer chains, whereby ductility of the aged asphalt is improved. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for repairing an asphalt pavement, comprising:
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passing an emitter over an aged asphalt pavement, wherein the emitter radiates terahertz energy into the pavement to a depth of at least 2 inches, wherein a temperature differential throughout a top two inches of pavement is 100°
F. or less, wherein a highest temperature in the top two inches of pavement does not exceed 300°
F., and wherein a minimum temperature in the top two inches of pavement is at least 200°
F., whereby voids and interstices in the damaged pavement are disturbed without dehydrogenation of the asphalt, and whereby oligomers present in the aged asphalt are linked together into longer polymer chains, whereby ductility of the asphalt is improved;allowing the pavement to cool to below 190°
F.; andapplying a compacting roller to the asphalt pavement to minimize voids and surface irregularities, wherein the asphalt is at a temperature no lower than 150°
F., whereby a density of the compacted asphalt pavement is similar to that of virgin asphalt pavement.
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Specification