PAVING MACHINE MEMBRANE DISPENSER

• US 20180258594A1
• Filed: 03/05/2018
• Published: 09/13/2018
• Est. Priority Date: 03/03/2017
• Status: Active Grant

• Current Assignee: Pavegard Products Inc.
• Original Assignee: Pavegard Products Inc.
• Inventors: Harco, Peter
• Granted Patent: US 10,538,884 B2
• Time in Patent Office: Days
• CPC Class Codes: E01C 19/20 Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders E01C19/21, E01C19/4813, E01C19/482, E01C23/098, E01C23/166 take precedence; fertiliser distributors A01C15/00 ; permanently-installed devices for applying gritting or thawing materials E01H10/005; mobile spreaders specially adapted for treating wintry roads E01H10/007
• CPC Class Codes: E01C 19/48 for laying-down the materials and consolidating them, or finishing the surface , e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ E01C19/002, E01C23/065 take precedence; devices for guiding or controlling the machines along a predetermined path E01C19/004
• CPC Class Codes: E01C 19/522 Apparatus for laying the elements by rolling or unfolding, e.g. for temporary pavings
• CPC Class Codes: E01C 2019/2055 Details not otherwise provided for
• CPC Class Codes: E01C 23/04 Devices for laying inserting or positioning reinforcing elements or dowel bars with or without joint bodies installing or inserting joint bodies per se E01C23/023, E01C23/026; Removable supports for reinforcing or load transfer elements non- removable supports therefor E01C11/02 E01C11/16; side forms adapted to supporting reinforcement E01C19/50; Devices, e.g. removable forms, for making essentially horizontal ducts in paving, e.g. for prestressed reinforcements
• CPC Class Codes: E01C 7/16 Prestressed concrete paving prestressed coverings from prefabricated concrete units E01C5/10; prestressed joint constructions E01C11/04; prestressed reinforcements E01C11/20
• 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

The present invention is directed to an improved design and improved method of installation of stress absorbing membrane interlayers, commonly known as SAMIs, used for strengthening and waterproofing asphalt pavements in road or highway surfacing operations. By a novel method of modifying a standard paving machine the present invention makes it easier and more convenient to install SAMI membranes beneath a layer of new asphalt pavement, thus providing greater resistance to pavement cracking resulting in lower overall maintenance costs.

Claims

1. Modifications made to an asphalt paving machine which modifications consists of one or a plurality of mounted membrane dispensing shafts which said shafts can hold and allow the dispensing of a pavement reinforcing membrane continuously beneath a paving machine as it moves forward.

2. Membrane dispensing shafts in accordance with claim 1, wherein the said shafts are mounted on the front, or leading, portion of the paving machine or may also be mounted on the sides or center area of the said paving machine.

3. Membrane dispensing shafts in accordance with claim 2, wherein the said shafts are positioned such that they can allow dispensing of the said membrane in multiple strips to cover the center width between the machine'"'"'s two tracks, and concurrently to cover the area beneath each of the machines two support tracks, and concurrently to cover the lateral area on the outer side of each of the machines two tracks, with or without the side edges of each membrane overlapping each adjacent membrane edge.

4. Membrane dispensing shafts in accordance with claim 3, where the shafts are positioned in a manner so that the edges of the said pavement reinforcing membrane strips dispensed from each shaft will overlap the edge of each adjacent dispensed membrane strip.

5. A Novel Method of asphalt paving whereby an asphalt paving machine with special membrane dispensing can continuously dispense a pavement reinforcing membrane onto a surface and concurrently dispense hot paving mix onto the said membrane as it moves forward.

6. A Novel pavement reinforcing membrane supplied as rolls and produced by hot-coating and sand surfacing both faces of a non-woven polymer fiber reinforcement sheet with an elastomeric modified asphalt bitumen coating which is formulated to have a heat-activated bonding surface.

7. A Novel pavement reinforcing membrane in accordance with claim 6, wherein the elastomeric modified asphalt bitumen coating contains the elastomeric Styrene Butadiene Styrene polymer modifier commonly known as SBS polymer.

8. Elastomeric modified asphalt bitumen coating in accordance with claim 7, wherein the said polymer modifier may be a Styrene Isoprene Styrene polymer, commonly known as SIS, alone or combined with an SBS polymer, or otherwise suitable polymers.

9. A novel pavement reinforcing membrane according to claim 8, wherein the said elastomeric asphalt coating may contain polymer modifier percentages ranging from 0% to 25% with a preferred total percentage of 10%.

10. A novel pavement reinforcing membrane according to claim 9 wherein, the non-woven polymer reinforcement sheet may be made of polyester fibers.

11. A novel pavement reinforcing membrane according to claim 10, wherein the non-woven polymer reinforcement sheet may be made of other suitable polymer fibers such as polypropylene, or a combination of other suitable fibers.

12. A novel pavement reinforcing membrane in accordance with claim 9, wherein the preferred asphalt bitumen utilized to blend with polymer modifier to coat the membrane is a standard paving grade of asphalt bitumen commonly known as 80/100 penetration grade, however other penetration or roofing grades of asphalt bitumen may be utilized also with or without added tackifying agents.