Void reducing asphalt membrane composition, method and apparatus for asphalt paving applications

• US 10,060,080 B2
• Filed: 07/11/2017
• Issued: 08/28/2018
• Est. Priority Date: 03/09/2015
• Status: Active Grant

• Current Assignee: Heritage Research Group, LLC
• Original Assignee: Heritage Research Group
• Inventors: Kriech, Anthony J., Wissel, Herbert L., Reece, Timothy P., Exline, Marvin Keller
• Primary Examiner(s): Addie, Raymond W
• Application Number:
  US15/646,912
• Publication Number:
  US 20170306569A1
• Time in Patent Office: 413 Days
• Field of Search: 404 17, 404 31, 404 72, 404 75, 404107, 404111
• CPC Class Codes: C08K 2003/2227 of aluminium
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 5/09 Carboxylic acids; Metal salts thereof; Anhydrides thereof
• CPC Class Codes: C08L 101/12 characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity liquid crystal materials or compositions C09K19/00
• CPC Class Codes: C08L 2555/50 Inorganic non-macromolecular ingredients
• CPC Class Codes: C08L 2555/60 Organic non-macromolecular ingredients, e.g. oil, fat, wax or natural dye
• CPC Class Codes: C08L 2555/80 Macromolecular constituents
• CPC Class Codes: C08L 2555/84 Polymers comprising styrene, e.g. , polystyrene, styrene-diene copolymers or styrene-butadiene-styrene copolymers
• CPC Class Codes: C08L 91/06 Waxes
• CPC Class Codes: C08L 93/00 Compositions of natural resins; Compositions of derivatives thereof of polysaccharides C08L1/00 - C08L5/00; of natural rubber C08L7/00
• CPC Class Codes: C08L 95/00 Compositions of bituminous materials, e.g. asphalt, tar, pitch
• CPC Class Codes: E01C 11/02 Arrangement or construction of joints for pavings consisting of prefabricated units E01C5/00; Methods of making joints machines therefor E01C23/02, E01C23/09; removable joint shutterings E01C23/021; Packing for joints sealing joints not restricted to road or airfield paving E04B1/68
• CPC Class Codes: E01C 11/24 Methods or arrangements for preventing slipperiness or protecting against influences of the weather measures taken in connection with the foundation E01C3/06; paving elements with anti-slip inlays E01C5/22; aggregates resisting to grinding E01C7/085, E01C7/142, E01C7/182; specially for surface layers E01C7/35; reinforcements extending up to the surface E01C11/16, E01C11/18, E01C11/185; drainage E01C11/22; windscreens E01F7/02; snow fences E01F7/02; combating fog E01H13/00
• CPC Class Codes: E01C 7/18 of road-metal and bituminous binders for surface treatments except for penetration coverings, or for thin surface layers E01C7/353; bituminous mixtures C08L95/00
• 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 7/30 of road-metal and other binders, e.g. synthetic material , i.e. resin
• CPC Class Codes: E01C 7/32 of courses of different kind made in situ
• CPC Class Codes: E01C 7/325 Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses sliding layers E01C7/34

Abstract

A void reducing asphalt membrane composition for asphalt pavements that includes: an asphalt binder; an elastomeric polymer; a wax modifier; and at least one of: i) fumed silica or fumed alumina; and ii) a saponified fatty acid and a resin acid gelling compound. The composition is resistant to flow when applied and migrates into hot mix asphalt in the area of the longitudinal joint to reduce air voids to 7% or less and reduce water permeability. The composition becomes tack-free quickly after application. The composition bonds to asphalt, concrete, brick, stone and metal.

Claims

1. A method of reducing air voids in a discrete portion of an asphalt pavement which comprises:

providing an asphalt membrane composition that comprises;

an asphalt binder,

an elastomeric polymer,

a wax modifier, and

at least one of fumed silica or fumed alumina;

applying a discrete band of the asphalt membrane composition on a surface to be paved with a hot mix asphalt;

paving over the surface and discrete band of asphalt membrane composition with a hot mix asphalt to form a pavement; and

allowing the asphalt membrane composition to migrate into the hot mix asphalt and reduce air voids in the pavement by migrating into the hot mix asphalt.

2. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 1, wherein the asphalt binder comprises 85 to 97 wt. % of the asphalt membrane composition.

3. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 1, wherein the surface to be paved comprises at least one of asphalt, concrete, brick, stone or metal.

4. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 1, wherein discrete band of asphalt membrane composition is positioned beneath a joint formed in the pavement.

5. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 4, wherein the pavement extends in a longitudinal direction and the joint formed in the pavement extends in the longitudinal direction.

6. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 4 wherein the joint is formed between two adjacent hot mix asphalt passes.

7. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 6, wherein the pavement extends in a longitudinal direction and the joint formed in the pavement extends in the longitudinal direction.

8. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 1, wherein the air voids are reduced to 7% or lower.

9. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 1, wherein the asphalt membrane composition further comprises at least one of a saponified fatty acid and a resin acid gelling compound.

10. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 1, wherein the discrete band of the asphalt membrane composition has a thickness that ranges from 1/16 to ⅜

inches.

11. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 1, wherein asphalt membrane composition is formulated to include 85 to 97 wt. % of the asphalt binder, 1 to 6 wt. % of the elastomeric polymer and 1 to 5 wt. % of the wax modifier.

12. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 1, wherein the total amount of fumed silica and fumed alumina in the asphalt membrane composition is 1 to 10 wt. %.

13. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 9, wherein the total amount of the saponified fatty acid and the resin acid gelling compound in the asphalt membrane composition is up to 3 wt. %.

14. A method of reducing air voids in a discrete portion of an asphalt pavement according to claim 1, wherein the asphalt membrane composition is applied to the surface to be paved by coating, rolling, spraying or a combination thereof.