Hot asphalt pavement installation method utilizing solid phase autoregenerative cohesion

Patent metadata

Field	Value
Publication number	US-10081920-B2
Application number	US-201615280945-A
Country	US
Kind code	B2
Filing date	Sep 29, 2016
Priority date	Mar 15, 2013
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

A method for installing hot asphalt pavement includes heating an aggregate to a temperature of from about 350° F. to about 400° F. using an emitter comprising a birefringent material, the emitter generating electromagnetic radiation having a wavelength of from 2 microns to 1 millimeter, wherein the aggregate is a recycled asphalt pavement; adding the aggregate to an asphalt in a mill to yield a mixture of aggregate with baked-on asphalt; laying the mixture down over a base to form a first layer of lift; and compacting the first layer.

First claim

What is claimed is:

1. A method for installing hot asphalt pavement, comprising:
providing an aggregate, wherein the aggregate comprises recycled asphalt pavement;
heating the aggregate to a temperature of from about 350° F. to about 400° F. using an emitter, wherein the emitter comprises a birefringent material through which electromagnetic radiation generated by the emitter passes, wherein the emitter generates electromagnetic radiation having a wavelength of from about 1 nm to 5 mm;
adding the aggregate to an asphalt in a mill to yield a mixture of aggregate with baked-on asphalt;
laying the mixture down over a base to form a first layer of lift; and
compacting the first layer, whereby a hot asphalt pavement is installed.

2. The method of claim 1 , wherein a temperature of the mixture when laid down to form the first layer is about 140° F.

3. The method of claim 1 , further comprising laying down and compacting one or more additional layers of lift atop the first layer of lift.

4. The method of claim 3 , wherein the first layer of lift and the one or more additional layers of lift have a thickness of approximately 12 inches.

5. The method of claim 3 , wherein no primer or additional material is put between the layers of lift.

6. The method of claim 1 , wherein the base is an existing asphalt or concrete pavement in need of repair.

7. The method of claim 1 , wherein the base is an earthen base covered with gravel that has been graded and compacted.

8. The method of claim 1 , wherein the mixture comprises 95% aggregate and 5% asphalt.

9. The method of claim 1 , wherein the aggregate comprises particles having a diameter of from ¼ inches to ⅜ inches.

10. The method of claim 1 , wherein the first layer provides a 2 inch to 3 inch lift.

11. The method of claim 1 , wherein the asphalt comprises a rubber polymer.

12. The method of claim 1 , wherein the asphalt added to the aggregate is in a form of an elastomer composition comprising butyl rubber, diene modified asphalt, and an environmentally hardened bioresin.

13. The method of claim 1 , wherein the elastomer composition comprises less than 1% perflurocarbons as a volatile component.

14. The method of claim 1 , wherein the elastomer composition comprises no perflurocarbons as a volatile component.

15. The method of claim 1 , wherein the emitter is a panel comprising a serpentine wire and wherein the birefringent material is a micaceous material.

16. The method of claim 1 , wherein the emitter produces electromagnetic radiation with a power density of from 0.47 to 2.33 W/cm 2 or from 133 to 664 (ft·lb f /min)/in 2 .

17. The method of claim 1 , wherein the electromagnetic radiation has a wavelength of 2 microns to 1 millimeter.

18. The method of claim 1 , wherein the emitter panel is configured to emit electromagnetic radiation at a wavelength of from about 20 nm to about 100 microns.

19. The method of claim 1 , wherein the emitter panel is configured to emit electromagnetic radiation at a wavelength of from about 20 microns to about 100 microns.

Assignees

• Coe William B

Inventors

• Coe William B

Classifications

• G21K5/02

  having no beam-forming means · CPC title

• E01C11/16

  Reinforcements ({as anchoring elements between layers E01C7/145, E01C7/185, E01C7/325} ; for building in general E04C) · CPC title

• C09D123/22

  Copolymers of isobutene; Butyl rubber {; Homo- or copolymers of other iso-olefines} · CPC title

• E01C23/065 Primary

  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 title

• E01C23/14

  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) · CPC title