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WO2025212311A1 - Composition d'enduit de scellement pour la technique "scrub seal", procédé et boîte d'application - Google Patents

Composition d'enduit de scellement pour la technique "scrub seal", procédé et boîte d'application

Info

Publication number
WO2025212311A1
WO2025212311A1 PCT/US2025/021193 US2025021193W WO2025212311A1 WO 2025212311 A1 WO2025212311 A1 WO 2025212311A1 US 2025021193 W US2025021193 W US 2025021193W WO 2025212311 A1 WO2025212311 A1 WO 2025212311A1
Authority
WO
WIPO (PCT)
Prior art keywords
scrub
asphalt
emulsion
sealer
premixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2025/021193
Other languages
English (en)
Inventor
Douglas Olsen
Huachun Zhai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idaho Asphalt Supply Inc
Original Assignee
Idaho Asphalt Supply Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US19/087,509 external-priority patent/US20250304794A1/en
Application filed by Idaho Asphalt Supply Inc filed Critical Idaho Asphalt Supply Inc
Publication of WO2025212311A1 publication Critical patent/WO2025212311A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/26—Bituminous materials, e.g. tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction

Definitions

  • the present disclosure relates generally to a scrub sealer composition and, more particularly, to the composition, to a method of preparing the composition, and to a scrub box advantageously used to apply the composition.
  • a road can be considered a durable surface (e.g., a route, way, path, drive, street, lane, lot, or similar thoroughfare or park) that has been prepared on land or over water to support any one or more of various types of traffic (e.g., vehicular traffic, pedestrian traffic, railway traffic, aircraft ground traffic, bicycle traffic, etc.). While roads can be constructed in a variety of different ways, most of these ways involve the application of a specialized material to an existing or newly prepared surface. [0004] Asphalt is one example of a material specially prepared for use in building roads.
  • the rubber adhesive is then compounded under high shear with an asphalt emulsion (e.g., an emulsion made from 50-70% asphalt, 30-40% water, and 0.5-4% surfactant) and formulated as a seal that can be spread or sprayed onto the road surface.
  • an asphalt emulsion e.g., an emulsion made from 50-70% asphalt, 30-40% water, and 0.5-4% surfactant
  • the addition of the crumb rubber reduces oxidative hardening that leads to cracking of the road.
  • the slurry seal of the ’445 patent may improve resistance to cracking, it is less than optimal.
  • the multi-stage process disclosed for mixing the slurry seal is complex, time consuming, expensive, and difficult to do on site. That is, the number of mixing steps and high temperatures create extreme requirements that are not easily achievable away from a plant environment.
  • the present disclosure is directed to a scrub sealer for use in filling cracks in a road.
  • the scrub sealer may include an asphalt emulsion and an aggregate premixture.
  • the asphalt emulsion may include water, asphalt, and polymer.
  • the aggregate premixture may include a first type of aggregate, and a crumb rubber.
  • machine(s) 12 may be configured to apply one or more materials 16 to an existing or newly prepared surface 18 to form, build up, treat and/or repair at least a portion of road 14.
  • the material may be known as a scrub sealer.
  • machine(s) 12 will be described in detail as land-based machines, any one or more of the disclosed machine(s) 12 could embody a non-land based machine (e.g., an aerial drone) configured to perform the same or similar operations, if desired.
  • Scrub box 12 may include components that receive the materials and apply the materials to road 14 in an equally distributed manner.
  • first machine 12 may be nothing more than a tractor configured to tow another machine.
  • second machine 12 may be an SSM having an integral or tow-behind scrub box.
  • the components of SSM 12 may include, among other things, a vehicle 20, one or more vessels 22, one or more hoppers 24, one or more mixers 26, and one or more conveyors 28 that convey the constituents of materials 16 from vessel(s) and/or hopper(s) 24 into mixer(s) 26.
  • SSM 12 includes two separate vessels (e.g., an emulsion vessel and an additive vessel) 22, a single hopper (e.g., an aggregate hopper) 24, a single mixer (e.g., a pugmill) 26, and a single conveyor 28.
  • Vehicle 20 may, itself, be an assembly of components that supports and/or powers the other components of machine 12.
  • these components may include a chassis, a power source mounted to the chassis, a drivetrain that is operatively connected to and driven by the power source, and one or more propulsion devices powered by the drivetrain.
  • the power source may include any source known in the art for powering a vehicle.
  • each vessel 22 may include an inlet to receive the liquid, an outlet to discharge the liquid, and any number of conditioning devices (e.g., mixers, agitators, heaters, coolers, recirculation circuits, sensors, valves, conduits, additive injectors, etc.) located between the inlet and outlet that serve to condition the liquid inside vessel 22.
  • conditioning devices e.g., mixers, agitators, heaters, coolers, recirculation circuits, sensors, valves, conduits, additive injectors, etc.
  • a valve or other metering device may be associated with the outlet of vessel 22 to regulate the flowrate of liquid leaving vessel 22.
  • a liquid-type of conveyor 28 e.g., a conduit with or without a conveying mechanism, such as a pump or auger
  • a conveying mechanism such as a pump or auger
  • Each hopper 24 may be equipped to receive, hold, condition, and/or discharge a non-flowable (e.g., solid) material.
  • each hopper 24 may include an opening to receive the solid and an outlet to discharge the solid. Because the solid material may not readily flow, the outlet of hopper 24 may be located at a gravitationally lowest position of hopper 24. For example, the outlet may be within a floor of hopper 24. It is contemplated that each hopper 24 could further include a conditioning device, if desired. In some applications, a gate or other metering device (not shown) may be associated with the outlet of hopper 24 to regulate a rate of solid material leaving vessel 22.
  • Side walls 32 and interior frame portions 34 may provide strength and structural rigidity to scrub box 12, such as to withstand the rigors of the paving environment including uneven surfaces, the weight of people or machine being placed atop scrub box 12, impacts with objects, transport to and from a paving site, and the like.
  • Side walls 32 and interior frame portions 34 may be constructed of any suitably strong material, for example metals, plastics, and/or composites (e.g., glass, carbon, or aramid fiber-reinforced polymers).
  • a leading row 38 of brushes 36 in scrub box 12 may be angled (e.g., in one or more directions) relative to a travel direction of SSM 12 and scrub box 12. This angling may facilitate spreading of the scrub sealer from a point of deposition (e.g., from a general midline location within a leading end of scrub box 12) transversely outward to the left- and/or right-side walls 32 of scrub box 12.
  • scrub box 12 may include a deck 52.
  • Deck 52 may be any suitable structure or material (e.g., steel, aluminum, plastic, composite, etc.) configured to support the weight of one or more users.
  • deck 52 may be formed of a grate, plate, or similar structure that extends between the left- and right-side walls 32 of containment basin 30.
  • Deck 52 may be removably attached to scrub box 12, if desired.
  • Scrub box 12 may be towed behind SSM 12 (referring to Fig.1) via at least one traction element 54.
  • scrub box 12 includes two (e.g., left- and right- located) traction elements 54.
  • Each traction element 54 may embody a chain, strap, bar, tongue, hitch, or the like.
  • a control element e.g., a shaft, a bar, a post, etc. - not shown
  • a lift mechanism may be provided to raise or lower scrub box 12 relative to surface 18.
  • body 40 may support and retain spreading protrusions 42.
  • Spreading protrusions 42 may be individually distributed along an underside (i.e., a side facing surface 18) of body 40 or arranged in groups.
  • Spreading protrusions 42 may have any suitable stiffness or flexibility.
  • brush 36 may include an HDPE black plastic body 40 that is about 2.5” wide, 12” long, and 1” thick.
  • One or more through-holes may be formed in a lengthwise and widthwise center of body 40 for connection to the rest of containment basin 30.
  • Two rows of polypropylene bristles 42 may be attached to body 40 and extend in the lengthwise direction, each row having a trim length of about 6”.
  • Bristles 42 may be arranged into distinct groupings known as tufts, with a different number of tufts in each of the rows such that the tufts are staggard between the rows.
  • the tufts of each row may be arranged into two separate segments located at opposing sides of the center hole.
  • the leading row of bristles 42 includes eighteen tufts, while the trailing row of bristles 42 includes twenty tufts.
  • Each tuft of bristles 42 may extend generally perpendicular from the lower surface of body 40.
  • bristles 42 of the disclosed brushes 36 may be configured to easily flex, while still creating at least some pressure against an adjacent wave of the scrub sealer.
  • the disclosed arrangement, density, and spacing of bristles 42 may be sufficient to inhibit collection of solids within bristles 42 and/or between the tufts, while also allowing for bleed-through of the associated liquids.
  • Cleaning of the disclosed brushes 36 may be simple, because material may not stick to bristles 36 and easily fall out from between bristles 36 and the associated tufts at conclusion of a paving operation.
  • the particular brushes 36 used within the leading row 38 and the trailing row 38 may be different.
  • the brushes 36 used in the leading row 38 may have stiffer spreading protrusions 42 and/or a greater density of spreading protrusions 42 to facilitate greater movement of the scrub sealer.
  • One or more pins 48 may extend through corresponding bores 50 in rails 44 and bodies 40 to axially position brushes 36 within a given row 38.
  • This configuration of brushes 36 and rails 44 may provide certain advantages, such as enabling fast and easy replacement and/or cleaning of worn, clogged, or dirty spreading protrusions 42.
  • One or more finishing elements 60 may be associated with one or more brushes 36 and/or one or more rows 38.
  • finishing element 60 may be associated with each individual brush 36 (see Fig.4) of the trailing row 38, or a single elongated finishing element 60 may be associated with the entire trailing row 38 (not shown).
  • Each finishing element 60 may be any suitable element that applies a final texture and/or appearance to the scrub sealer as the finishing element 60 passes over the scrub sealer.
  • Finishing element 60 may be fabricated from a flexible material to take the form of a smooth sheet, strip, fabric, or screen.
  • the flexible material may be, for example, an elastomer (e.g., natural or synthetic rubber; a fiber such as cotton, wool, jute, hemp, or synthetic fibers; a metal such as steel, aluminum, etc.; or combinations of these materials (e.g., fiber-reinforced rubber).
  • finishing element 60 may be integral to brush 36.
  • finishing element 60 may be bonded to body 40 (e.g., similar to spreading protrusions 42). In these applications, finishing element 60 may be located to lead spreading protrusions 42 or trail spreading protrusions 42.
  • Acid or base may be selective added to the solution to adjust a pH, according to the category of the surfactant used.
  • a second amount of hot asphalt may be mixed with the solution and be sheared through a colloid mill rotating at high speed.
  • the asphalt emulsion is made from a minimum of 65% asphalt (e.g., a minimum of at least 70% asphalt).
  • the asphalt may be heated to about 275-325°F (135- 165°C).
  • the asphalt may be straight asphalt or a polymer-modified asphalt (i.e., straight asphalt that has been previously mixed together with a polymer). If straight asphalt is used, a polymer may be separately added to the emulsion mixing in the colloid mill.
  • the polymer may include styrene-butadiene-rubber (SBR), neoprene, oxidized polyethylene wax (OPE), acrylic, styrene–butadiene-styrene (SBS), urethane, ethylene-vinal-acetate (EVA), natural rubber, and/or styrene-isoprene- styrene (SIS).
  • SBR styrene-butadiene-rubber
  • OPE oxidized polyethylene wax
  • SBS styrene–butadiene-styrene
  • EVA ethylene-vinal-acetate
  • natural rubber and/or styrene-isoprene- styrene

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

La présente invention concerne un procédé de préparation d'un enduit de scellement pour la technique "scrub seal". Le procédé comprend la préparation d'une émulsion d'asphalte, et la préparation d'un pré-mélange d'au moins deux types différents d'agrégat. Le procédé comprend également l'opération consistant à faire passer l'émulsion d'asphalte et le pré-mélange à travers un mélangeur (26) pour former l'enduit de scellement pour la technique "scrub seal".
PCT/US2025/021193 2024-04-01 2025-03-24 Composition d'enduit de scellement pour la technique "scrub seal", procédé et boîte d'application Pending WO2025212311A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US202463572764P 2024-04-01 2024-04-01
US63/572,764 2024-04-01
US19/087,509 2025-03-22
US19/087,509 US20250304794A1 (en) 2024-04-01 2025-03-22 Scrub sealer composition, method, and application box

Publications (1)

Publication Number Publication Date
WO2025212311A1 true WO2025212311A1 (fr) 2025-10-09

Family

ID=95375333

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2025/021193 Pending WO2025212311A1 (fr) 2024-04-01 2025-03-24 Composition d'enduit de scellement pour la technique "scrub seal", procédé et boîte d'application

Country Status (1)

Country Link
WO (1) WO2025212311A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8808445B2 (en) 2008-12-30 2014-08-19 William B. Coe Asphalt-rubber compositions and systems and methods for preparing same
US11753778B2 (en) 2020-08-20 2023-09-12 Idaho Asphalt Supply, Inc. Adjustable paving machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8808445B2 (en) 2008-12-30 2014-08-19 William B. Coe Asphalt-rubber compositions and systems and methods for preparing same
US11753778B2 (en) 2020-08-20 2023-09-12 Idaho Asphalt Supply, Inc. Adjustable paving machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GHENI AHMED A ET AL: "Texture and design of green chip seal using recycled crumb rubber aggregate", JOURNAL OF CLEANER PRODUCTION, ELSEVIER, AMSTERDAM, NL, vol. 166, 16 August 2017 (2017-08-16), pages 1084 - 1101, XP085197515, ISSN: 0959-6526, DOI: 10.1016/J.JCLEPRO.2017.08.127 *

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