WO2024256686A1 - Couche intermédiaire de renforcement de chaussée en asphalte - Google Patents

Couche intermédiaire de renforcement de chaussée en asphalte Download PDF

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Publication number
WO2024256686A1
WO2024256686A1 PCT/EP2024/066662 EP2024066662W WO2024256686A1 WO 2024256686 A1 WO2024256686 A1 WO 2024256686A1 EP 2024066662 W EP2024066662 W EP 2024066662W WO 2024256686 A1 WO2024256686 A1 WO 2024256686A1
Authority
WO
WIPO (PCT)
Prior art keywords
ranging
layer
pavement
textile
structural reinforcement
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.)
Ceased
Application number
PCT/EP2024/066662
Other languages
English (en)
Inventor
Jana KALASKOVA
Stepan BOHUS
Abhijith BS
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.)
Saint Gobain Adfors SAS
Original Assignee
Saint Gobain Adfors SAS
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
Application filed by Saint Gobain Adfors SAS filed Critical Saint Gobain Adfors SAS
Publication of WO2024256686A1 publication Critical patent/WO2024256686A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/185—Isolating, separating or connecting intermediate layers, e.g. adhesive layers; Transmission of shearing force in horizontal intermediate planes, e.g. by protrusions

Definitions

  • the invention concerns an asphalt pavement reinforcing interlayer, a method of obtaining the same and of repairing or constructing a pavement.
  • Pavement usually comprises asphalt, concrete or mixtures thereof, which can be damaged by many factors such as weather and traffic loading. The latter in particular induces cracking in new and rehabilitated pavement through the transmission to the pavement through wheels of loads in the down and transverse directions.
  • a base layer that, for example in the case of the repairing of a pavement, may be an existing layer comprising asphalt or cement; and a top layer comprising asphalt.
  • a base layer that, for example in the case of the repairing of a pavement, may be an existing layer comprising asphalt or cement
  • a top layer comprising asphalt.
  • a paving textile interlayer system comprising a non-woven paving textile, made of thermoplastic fibers, and a tack coat.
  • This system may further include a fiberglass grid.
  • the known systems usually require the use of a tack coat for bonding the interlayer to at least one of the base or the top layer.
  • Said tack coat is usually an asphalt emulsion and require the curing of the water it contains before applying any further layer.
  • the present invention offers to ease the installation or the repairing of a pavement while still maintaining a good level of bonding of the whole pavement.
  • This bonding is primordial as it prevents the cracking of the pavement and thus prolongate its lifespan.
  • the known systems when including a fiberglass grid, also include a non-woven textile which brings a stress-relief function to the system
  • the present invention concerns a pavement interlayer system comprising successively:
  • the present invention relates to a process of installing or repairing a pavement comprising:
  • Asphalt layer in the sense of the present invention, should be understood as a layer comprising asphalt, such as an asphalt mixture.
  • a “cement layer” is a layer comprising cement, for example concrete.
  • the “base layer” may be semi-rigid. It may comprise a binder.
  • the binder may comprise cement and water.
  • the disposable peel off film, or foil allows to handle the system, for example in the form of a roll, by preventing the bonding of said system to an undesired surface, before being removed for the application of the system.
  • the adhesive layer ensures the cohesion of the whole system according to the invention, for example by preventing the delamination of the layers constituting the system, as well as its bonding to the repaired or new pavement.
  • the structural reinforcement layer while ensuring the reinforcement of the road, also allows the adhesive(s) layer(s) to pass through the openings of the open grid it comprises to provide an enhanced bonding thanks to its grid structure.
  • the sand of the top layer while fulfilling the same role as the disposable peel off film, i.e. allowing the handling of the system prior to its installation without said system bonding to an undesired surface, further allows vehicles, such as construction vehicles, to drive on the system of the invention, for example during the installation or repairing of a pavement, without damaging the system, for example because of the interactions between the adhesive layer and the tyres of the vehicles.
  • the combination of these features yields an interlayer system for repairing or constructing pavement that is easy to use and handle while providing an improved bonding within the layers of the new or repaired pavement, a prevention of the cracking of the pavement, and thus improve the lifespan of said pavement.
  • the system of the invention may further comprise a second adhesive layer comprising bitumen disposed between the structural reinforcement layer and the top layer.
  • a second adhesive layer to the system further enhances the bonding of the layers and the cohesion of the repaired or new pavement that comprises the system of the invention.
  • the grid comprised in the structural reinforcement layer may be formed of at least two sets of substantially parallel strands of continuous filament glass fibres, each set having openings between adjacent strands and the sets being oriented at a substantial angle, in particular at a substantially right angle, so as to define openings within the grid.
  • this grid structure allows the bitumen comprised in the adhesive(s) layer(s) through, in order to provide a better bonding of the layer constituting both the system of the invention and a pavement comprising it.
  • the adhesive(s) layer(s) may contain fillers, the size of which must allow said adhesive(s) layer(s) to intertwine with the structural reinforcement layer.
  • the adhesive layer and/or the second adhesive layer may further comprise fillers having a D 50 ranging from 50 ⁇ m to 150 ⁇ m, in particular ranging from 65 ⁇ m to 120 ⁇ m and preferably from 80 ⁇ m to 100 ⁇ m, and/or having a D 90 ranging from 200 ⁇ m to 300 ⁇ m, in particular from 220 ⁇ m to 280 ⁇ m, and preferably from 230 ⁇ m to 270 ⁇ m
  • Such fillers may be such as CaCO 3 and SiO 2 .
  • the openings of said grid may have dimensions, in particular lengths and/or widths, ranging from 15 mm to 50 mm, in particular ranging from 20 mm to 40 mm and preferably ranging from 22 mm to 30 mm.
  • a grid with such dimensions is particularly adapted to provide a good compromise between the enhancement of the bonding of the system as recited herein and the structural reinforcement of the system.
  • the open grid in a system according to the invention may have a weight ranging from 200 g/m2 to 700 g/m2, in particular ranging from 300 g/m2 to 650 g/m2, preferably ranging from 400 g/m2 to 600 g/m2.
  • the structural reinforcement layer in a system according to the invention may have a tensile strength ranging from 30 to 250 kN/m, in particular from 50 to 200 kN/m.
  • system of the invention is devoid of any non-woven textile.
  • the system of the invention offers an improved bonding and thus better prevents the cracking of the road.
  • the structural reinforcement layer further comprises a non-woven textile, in particular a non-woven polymer textile, and preferably a non-woven thermoplastic textile, such as a non-woven polyethylene and/or polyester textile.
  • the system of the invention further provides a stress-relief function to the pavement.
  • the non-woven textile may consist essentially of fibers of at least one material, for example chosen from polymers, minerals and carbon fibers.
  • Amongst mineral fibers that may be used as a non-woven textile in the structural reinforcement layer of a system according to the invention may be cited glass fibers and basalt fibers.
  • thermoplastic fibers such as polyester fibers, polypropylene fibers, polyethylene fibers, polyamide fibers and acrylic fibers.
  • the non-woven textile may have a weight ranging from 5 g/m2 to 150 g/m2, in particular ranging from 10 g/m2 to 100 g/m2 and preferably ranging from 15 g/m2 to 50 g/m2.
  • the system according to the invention may have a top layer essentially consisting of sand particles having a size ranging from 0.05 mm to 3.00 mm, in particular from 0.06 mm to 2.50 mm.
  • the system according to the invention may have a top layer having a weight ranging from 100 g/m2 to 600 g/m2, in particular ranging from 120 g/m2 to 500 g/m2, and preferably ranging from 150 g/m2 to 450 g/m2.
  • the top layer of a system according to the invention has a weight of 150 g/m2 or 400 g/m2.
  • the weight of the top layer is chosen according to both the softness and the impregnation capacity of the bitumen comprised in the adhesive layer(s) of a system according to the invention.
  • a disposable peel-off non-stick film is affixed to the lower surface of the adhesive layer comprising bitumen and is removed prior to application.
  • system according to the invention comprises only the listed recited herein.
  • the system according to the invention consists of the following layers, said layers being as defined herein:
  • system according to the invention consists of the following layers, said layers being as defined herein:
  • the system of the invention may be provided in the form of a roll.
  • a base layer comprising for example asphalt or cement, such as an asphalt mixture or concrete may be laid.
  • the system of the invention for example as a roll, may then be placed upon that base layer, after removal of the disposable peel off film of the bottom layer as defined herein.
  • a surface layer comprising asphalt may then be paved on top of the system according to the invention to provide a road comprising said system.
  • the base layer may consist of existing materials of the road, comprising for example asphalt or cement, such as an asphalt mixture or concrete.
  • the present invention relates to a process of installing or repairing a pavement comprising:
  • the base layer is an asphalt layer or a cement layer.
  • said layer may consist of materials from said existing pavement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

La présente invention concerne un système de couche intermédiaire de chaussée comprenant successivement : une couche inférieure comprenant un film pelable jetable, une couche adhésive comprenant du bitume, une couche de renforcement structural comprenant une grille ouverte de fibres de verre à filament continu, et une couche supérieure constituée essentiellement de sable. L'invention concerne en outre un procédé d'installation et de réparation d'une chaussée.
PCT/EP2024/066662 2023-06-14 2024-06-14 Couche intermédiaire de renforcement de chaussée en asphalte Ceased WO2024256686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23305948.4 2023-06-14
EP23305948.4A EP4477799A1 (fr) 2023-06-14 2023-06-14 Couche intermédiaire de renforcement de chaussée en asphalte

Publications (1)

Publication Number Publication Date
WO2024256686A1 true WO2024256686A1 (fr) 2024-12-19

Family

ID=87060291

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/066662 Ceased WO2024256686A1 (fr) 2023-06-14 2024-06-14 Couche intermédiaire de renforcement de chaussée en asphalte

Country Status (2)

Country Link
EP (1) EP4477799A1 (fr)
WO (1) WO2024256686A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5592403A (en) * 1978-12-31 1980-07-12 Nichireki Chem Ind Co Paving of floor board
KR100463914B1 (ko) * 2002-08-23 2004-12-30 (주)에스엔건설 아스팔트 보강재 제조방법 및 그 보강방법
KR101174256B1 (ko) * 2012-07-05 2012-08-14 김문정 지하차도 구조물의 신축이음부 포장층 연결부재 및 포장층 시공방법
KR101612491B1 (ko) * 2015-09-23 2016-04-14 (주)에스엔건설 바잘트 섬유 그리드를 이용한 아스팔트 포장 내구성 증대공법
EP3686344A1 (fr) 2018-01-23 2020-07-29 Propex Operating Company, LLC Système imperméable de couches intercalaires pour chaussée et procédé d'imperméabilisation, réparation ou construction d'une route

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5592403A (en) * 1978-12-31 1980-07-12 Nichireki Chem Ind Co Paving of floor board
KR100463914B1 (ko) * 2002-08-23 2004-12-30 (주)에스엔건설 아스팔트 보강재 제조방법 및 그 보강방법
KR101174256B1 (ko) * 2012-07-05 2012-08-14 김문정 지하차도 구조물의 신축이음부 포장층 연결부재 및 포장층 시공방법
KR101612491B1 (ko) * 2015-09-23 2016-04-14 (주)에스엔건설 바잘트 섬유 그리드를 이용한 아스팔트 포장 내구성 증대공법
EP3686344A1 (fr) 2018-01-23 2020-07-29 Propex Operating Company, LLC Système imperméable de couches intercalaires pour chaussée et procédé d'imperméabilisation, réparation ou construction d'une route

Also Published As

Publication number Publication date
EP4477799A1 (fr) 2024-12-18

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