Tack compounds and microwave method for repairing voids in asphalt pavement
AssigneeRaytheon Company
InventorsRobert F. Bowen, John S. Sklenak, Kenneth W. Dudley
Life of this patent
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Abstract
A method for repairing voids such as potholes in asphalt pavement by mixing a lossy microwave material in the tack used for the tack layer. The asphalt patch used to fill the pothole is relatively non-lossy so that a substantial portion of microwave energy applied to the upper surface penetrates through the asphalt patch and is absorbed in the tack layer. The heating of the tack layer is enhanced to improve the interface bond between the asphalt patch and the surface of the pothole.
Claims13
A method of repairing a void in asphalt pavement comprising the steps of:
- mixing a lossy microwave material with a tack to form a lossy composite tack;
- applying said composite tack to the surface of said void to form a layer having a thickness of 1/8 inch or less;
- filling said void on top of said composite tack layer with an asphalt patch which is non-lossy relative to said composite tack;
- and
- applying microwave energy for a predetermined time period to the upper surface of said asphalt patch wherein a substantial portion of said microwave energy penetrates through said asphalt path and is absorbed by said lossy microwave material in said lossy composite tack to heat said composite tack layer to form an interface bond between said asphalt patch and said surface of said void.
A method of repairing a void in asphalt pavement comprising the steps of:
- mixing a lossy microwave material comprising Fe.sub.3 O.sub.4 with a tack to form a lossy composite tack wherein said Fe.sub.3 O.sub.4 is mixed with said tack at an approximate ratio 1:1 by weight;
- applying said composite tack to the surface of said void to form a layer having a thickness of 1" or less;
- filling said void on top of said composite tack layer with an asphalt patch;
- and
- applying microwave energy for a predetermined time period to the upper surface of said asphalt patch wherein a substantial portion of said microwave energy penetrates through said asphalt patch and is absorbed by said lossy microwave material in said lossy composite tack to heat said composite tack layer to form an interface bond between said asphalt patch and said surface of said void.
A composite for paving comprising, in combination:
- a mixture of tack and a lossy microwave material dispersed in said tack for enhancing heating of said mixture when said mixture is exposed to microwave radiation, said lossy material comprising Fe.sub.3 O.sub.4 mixed with said tack at an approximate ratio of 1:1 by weight.
Dependencies are inferred from the claim text.