Method of treating a pavement surface and apparatus for performing such method

• US 6,444,258 B1
• Filed: 07/14/2000
• Issued: 09/03/2002
• Est. Priority Date: 07/14/2000
• Status: Expired due to Fees

• Current Assignee: Terry Asphalt Materials Incorporated
• Original Assignee: Highway Preservation Systems, Ltd.
• Inventors: Terry, Phillip Rand
• Primary Examiner(s): Beck, Shrive P.
• Assistant Examiner(s): Fuller, Eric B
• Application Number:
  US09/616,704
• Time in Patent Office: 781 Days
• Field of Search: 427/136, 427/138, 427/139, 427/402, 427/403, 427/413, 404/82, 404/101, 404/107, 404/108
• US Class Current: 427/138
• CPC Class Codes: E01C 19/16 for applying or spreading liquid materials, e.g. bitumen slurries E01C19/1054, E01C19/21, E01C19/45, E01C19/4813, E01C21/00, E01C23/02, E01C23/03, E01C23/065, E01C23/096, E01C23/0973, E01C23/0993 , E01C23/16 take precedence; spreading-out or smoothing-down means as parts of spraying apparatus E01C19/178
• CPC Class Codes: E01C 19/4813 the materials being simultaneously but separately applied binders and granular or pulverulent material such application per se E01C19/21
• CPC Class Codes: E01C 7/185 Isolating, separating or connecting intermediate layers, e.g. adhesive layers; Transmission of shearing force in horizontal intermediate planes, e.g. by protrusions E01C7/187 takes precedence; adhesive layers for materials E01C7/35
• CPC Class Codes: E01C 7/353 with exclusively bituminous binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively bituminous binders, e.g. for roughening or clearing
• CPC Class Codes: Y10T 428/31815 Of bituminous or tarry residue

Abstract

A method and apparatus of treating a pavement surface, including the steps of: applying a layer of bituminous sealant at a predetermined temperature and application rate on the pavement surface; applying a layer of bituminous emulsion at a predetermined temperature and application rate on the first of bituminous sealant, wherein a thermal reaction occurs between the bituminous sealant and the bituminous emulsion so as to accelerate a material break and cure time for said layers; and, providing a layer of aggregate particles at a predetermined application rate on the layers of bituminous sealant and bituminous emulsion during the thermal reaction. The steps of the method are performed successively along a particular direction of advance at a rate which permits them to be accomplished within a predetermined time period. Additional steps of compacting the layers and/or applying an asphalt layer thereon may also be performed.

Claims

1. A method of treating a pavement surface, comprising the following steps;

(a) applying a layer of bituminous sealant at a predetermined temperature within a range of approximately 250-425°

F. and at a predetermined application rate on said pavement surface;

(b) applying a layer of bituminous emulsion having approximately 20-75% by weight to water at a predetermined temperature within a range of approximately 77-210°

F. and at a predetermined application rate to said bituminous sealant layer while the temperature of said bituminous sealant layer is substantially within said predetermined range therefor, wherein a thermal reaction occurs between said bituminous sealant and said bituminous emulsion so as to cause a material break and cure time for said layers of less than approximately 30 minutes; and

(c) providing a layer of aggregate particles at a predetermined application rate on said layers of bituminous sealant and bituminous emulsion during said thermal reaction.

2. The method of claim 1, wherein said predetermined application rate of said layer of bituminous sealant is within a range of approximately 0.05-1.0 gallon per square yard.

3. The method of claim 1, wherein said predetermined application rate of said layer of bituminous emulsion is within a range of approximately 0.05-1.0 gallon per square yard.

4. The method of claim 1, wherein said layer of aggregate particles has a temperature less than approximately 300°

F.

5. The method of claim 1, wherein said application rate of said layer of aggregate particles is within a range of approximately 7-60 pounds per square yard.

6. The method of claim 1, wherein the steps of applying said layer of bituminous sealant, applying said layer of bituminous emulsion, and providing said layer of aggregate particles are performed successively along a particular direction of advance within a period of approximately 10 seconds or less.

7. The method of claim 1, wherein the steps of applying said layer of bituminous sealant, applying said layer of bituminous emulsion, and providing said layer of aggregate particles are performed along a particular direction of advance at a rate of at least approximately 60 feet per minute.

8. The method of claim 1, wherein said layer of bituminous emulsion is applied in a substantially uniform amount on said layer of bituminous sealant.

9. The method of claim 1, wherein said layer of aggregate particles is provided in a substantially uniform amount on said layer of bituminous emulsion.

10. The method of claim 1, wherein said material break and cure time of said bituminous sealant and said bituminous emulsion layers is approximately 1-10 minutes.

11. The method of claim 1, wherein said material break and cure time of said bituminous sealant and said bituminous emulsion layers is approximately 1-5 minutes.

12. The method of claim 1, wherein said layer of bituminous sealant is applied in a manner to create a turbulent flow so that contaminants along said pavement surface are lifted and mixed therein.

13. The method of claim 1, wherein said layer of bituminous sealant is applied in a thin substantially continuous layer on said pavement surface so as to provide a substantially uniform membrane between said pavement surface and said layer of bituminous emulsion.

14. The method of claim 1, wherein the steps of applying said layer of bituminous sealant, applying said layer of bituminous emulsion, and providing said layer of aggregate particles occur separately.

15. The method of claim 1, wherein the steps of applying said layer of bituminous emulsion and providing said layer of aggregate particles occur substantially simultaneously.

16. The method of claim 1, said bituminous sealant her being comprised of:

(a) approximately 80-90% by weight of asphalt cement;

(b) approximately 0-20% by weight of a polymer modifier;

(c) approximately 0-10% by weight of a reinforcement additive; and

,

(d) approximately 0-5% by weight of an adhesion promoter.

17. The method of claim 1, said bituminous emulsion further being comprised of:

(a) approximately 5-85% by weight of asphalt cement;

(b) approximately 1-10% by weight of a surfactant;

(c) approximately 0-10% by weight of a polymer modifier;

(d) approximately 0-5% by weight of a reinforcement additive; and

(e) approximately 0-3% by weight of a cross-linking agent.

18. The method of claim 1, further comprising the step of compacting said layer of bituminous sealant, said layer of bituminous emulsion, and said layer of aggregate particles at a predetermined rate.

19. The method of claim 18, wherein said compacting step occurs before said thermal reaction has been completed.

20. The method of claim 1, further comprising the step of applying an asphalt surface to said layer of bituminous emulsion and third layer of aggregate particles.

21. The method of claim 20, further comprising the step of providing a leveling course to said layer of bituminous emulsion and said layer of aggregate particles prior to applying said asphalt surface.