Road repair systems

• US 20060104716A1
• Filed: 08/14/2003
• Published: 05/18/2006
• Est. Priority Date: 08/16/2002
• Status: Abandoned Application

• Current Assignee: Nu-Phalt Limited
• Original Assignee: Nu-Phalt Limited
• Inventors: Jones, Mark Richard
• Application Number:
  US10/524,678
• Publication Number:
  US 20060104716A1
• Time in Patent Office: Days
• US Class Current: 404/77
• CPC Class Codes: E01C 23/065 Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving in situ mixing of hydraulic cement concrete E01C19/025; apparatus for in-plant recycling E01C19/1004, E01C19/1036
• CPC Class Codes: E01C 23/14 for heating or drying foundation, paving, or materials thereon, e.g. paint E01C23/03 takes precedence; heating or drying devices incorporated in the paving E01C11/26; surface soil stabilisation by fusing, calcining or burning soil in situ E01C21/02; for street cleaning E01H1/08; melting snow or ice on surfacing E01H5/10

Abstract

A range of various sized attachments of infrared heaters powered by liquid petroleum gas (LPG) for installation to a number of current styles of vehicles. These infrared heaters are designed to heat asphalt and other road and structure surfaces for subsequent repair. The vehicles may be an adaptation to existing designs of medium to heavy road going flat bed trucks or to various types of construction loaders. The attachments to construction loaders may be installed as adaptions to front end loader quick-change systems or back hoe bucket mount positions. The whole attachment and its support operating and control assembly may be easily removed for addition to other vehicles of similar types. With the area heated to an appropriate temperature to release the bound surface structure it can then be raked and combined with minimal amounts of new surface fill if required to the previously damaged area. A rejuvenating liquid is then sprayed onto the mix, prior to compaction to provide a fast, economic, quiet and more environmentally friendly means of road repair than traditional methodology.

Claims

1-20. -20. (canceled)

21. Equipment for the repair of asphalt surfaces comprising a single vehicle road repair system with means for supplying infrared heat to the surface to be repaired, means for storing and supplying hot new asphalt, means for storing and supplying a rejuvenation liquid, and means for storage and supply of gas for heating.

22. Equipment according to claim 21, in which the single vehicle is a truck which optionally is fitted at the rear with an infrared heater system that is adapted to be moved towards and away from the surface to be repaired.

23. Equipment according to claim 21 fitted with a hot box that contains replacement asphalt and optionally an adjacent tank for rejuvenation liquid wherein the hotbox residual heat is used to maintain the working temperature of the rejuvenation liquid.

24. Equipment according to claim 21, provided with a tow bar for towing a trailer-mounted compaction roller.

25. Equipment according to claim 21 in which the infrared heating system is hinged so that it may be folded up against the back of the truck.

26. Equipment according to claim 21, in which the vehicle is a tractor backhoe or wheeled or skid-steer loader and optionally wherein the attachment that forms the infrared heater is fixed to the dipper arm (of a backhoe loader) or the front loader quick change system (of a skid steer) so that it may be moved towards and away from the surface to be repaired.

27. Equipment according to claim 26, provided with an attachment fitted to the rear of the vehicle containing a hot box for new asphalt, an adjoining tank for rejuvenation liquid that uses the hotbox residual heat to maintain a good working temperature, and a spray lance for its application to the raked area.

28. Equipment according to claim 21 provided with a control system for the heater and optionally wherein the control system enables independent on/off control of each burner or set of burners within the heater.

29. Equipment according to claim 21 in which the heater blanket is made of Fecralloy®

.

30. A process for repairing damaged asphalt in which the damaged area to be repaired is heated using one or more LPG powered infrared heaters to a depth of 10 mm to 100 mm from the surface wherein the average heating temperature is from 50 to 200°

C., and the heating is for from 5 to 20 minutes, once heated, the damaged area is raked and/or scarified, the rejuvenating liquid comprising emulsified oils high in aromatics with high levels of polar compounds is then applied to the raked and/or scarified area, the surface is then compacted, optionally, wherein, precoated chippings are added on hot rolled asphalt and compacted into the surface to give road texture, and the surface is allowed to cool and harden for at least one hour.

31. A process according to claim 30 in which the rejuvenating liquid contains from 30 to 80 parts by weight in total of a heavy paraffin distillation solvent extract and a heavy naphthenic distillate solvent extract, from 10 to 60 parts by weight of water, and from 1 to 5 parts by weight of the emulsifier.

32. A process according to claim 30 in which a topcoat of a sealer/binder is also applied and/or in which a dusting of fine aggregate is added to ensure good initial skid resistance.