Back to results
US RE48,220 E1Granted
Embedding photocatalytic titanium dioxide in asphalt surfaces to reduce pollutants via photocatalytic reactions
AssigneeD&D Emulsions, Inc.
InventorsColin Durante, Delbert L. Dawson
Life of this patent
Estimating the term…
Abstract
Methods for embedding photocatalytic titanium dioxide in asphalt surfaces to reduce pollutants via photocatalytic reactions include applying an amount of an asphalt surface treatment compound to an upper surface of the asphalt surface, the asphalt surface treatment compound including a mixture of a liquid carrier compound with a titanium dioxide (TiO2) photocatalyst.
Claims12
A method for treating a warm mix asphalt surface, the method comprising:
- impregnating an upper surface of the warm mix asphalt surface with a mixture of a liquid asphalt carrier compound with a titanium dioxide (TiO2) photocatalyst, the liquid asphalt carrier compound carrying titanium dioxide (TiO2) nanoparticles into the upper surface of the warm mix asphalt surface, forming a photocatalytic layer within the warm mix asphalt surface that oxidizes nitrogen oxides (NOx) and other pollutants when the warm mix asphalt surface is exposed to ultraviolet sunlight and airborne water molecules, the liquid asphalt carrier compound penetrating the warm mix asphalt surface to a depth range of between approximately a quarter of an inch to approximately a half of an inch, as measured from the upper surface of the warm mix asphalt surface, so as to embed the titanium dioxide (TiO2) photocatalyst in the asphalt surface and to ensure that as the upper surface of the warm mix asphalt surface wears off, the photocatalytic layer appears on the warm mix asphalt surface.
A method, comprising:
- impregnating an upper surface of a warm mix asphalt surface with a photocatalytic compound, the photocatalytic compound including a liquid asphalt carrier compound and a titanium dioxide (TiO2) photocatalyst, the titanium dioxide TiO2) photocatalyst including titanium dioxide (TiO2) nanoparticles, the liquid asphalt carrier compound carrying the titanium dioxide (TiO2) nanoparticles into the upper surface of the warm mix asphalt surface, forming a photocatalytic layer within the warm mix asphalt surface that oxidizes nitrogen oxides (NOx) and other pollutants when the warm mix asphalt surface is exposed to ultraviolet sunlight and airborne water molecules, in which the impregnation allows the photocatalytic compound to penetrate the warm mix asphalt surface down to a depth of at least a quarter of an inch relative to the upper surface of the warm mix asphalt surface, the liquid asphalt carrier compound being combined with a the titanium dioxide (TiO2) photocatalyst so as to embed the titanium dioxide (TiO2) photocatalyst in the warm mix asphalt surface and to ensure that as the upper surface of the warm mix asphalt surface wears off, a submerged layer of the titanium dioxide (TiO2) photocatalyst appears on the warm mix asphalt surface.
A warm mix asphalt surface treatment compound, comprising:
- an amount of an asphaltic liquid carrier compound mixed with an amount of a titanium dioxide (TiO2) photocatalyst, wherein the asphaltic liquid carrier compound penetrates a warm mix asphalt surface down to a depth of at least a quarter of an inch relative to an upper surface of the warm mix asphalt surface, the liquid carrier compound impregnating the warm mix asphalt surface.
Dependencies are inferred from the claim text.