EP1403435A1 - Verfahren zur Verbesserung der Oberflächenqualität von Fahrbahnen und Vorrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zur Verbesserung der Oberflächenqualität von Fahrbahnen und Vorrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP1403435A1
EP1403435A1 EP03292394A EP03292394A EP1403435A1 EP 1403435 A1 EP1403435 A1 EP 1403435A1 EP 03292394 A EP03292394 A EP 03292394A EP 03292394 A EP03292394 A EP 03292394A EP 1403435 A1 EP1403435 A1 EP 1403435A1
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EP
European Patent Office
Prior art keywords
wearing course
spreading
granular material
installation according
dispersion
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.)
Granted
Application number
EP03292394A
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English (en)
French (fr)
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EP1403435B1 (de
Inventor
Jean-Luc Aubert
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Colas SA
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Colas SA
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    • 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
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/20—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders
    • 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
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving 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

Definitions

  • the invention relates to a method for improving the surface qualities of the wearing course of a road and to a device for implementing this method.
  • the roads are carried out, usually, by spreading, on a platform, a wearing course made up of aggregates coated in a bituminous binder which can be cold or hot, natural or synthetic, depending on the process used.
  • the equipment used for this purpose is mounted on a tractor which carries a reserve bucket periodically filled with coated aggregates and which opens into a coating spreading member forming a layer of regular thickness and over a working width which depends on the device used and can be 4 to 8 meters.
  • the tractor advances continuously and a strip-like surface course of constant width is thus produced, centered on a longitudinal axis. This asphalt layer is then compacted by known means in order to produce the running surface.
  • the binder which coats the aggregates forms a relatively smooth external film, which completely covers the upper face of the wearing course.
  • the passage of vehicles gradually eliminates this external film by showing the aggregates, but it is only after a certain period, of the order of six months, that the running surface becomes sufficiently rough.
  • the invention makes it possible to solve such problems by means of a particularly simple method and installation, making it possible to spread the desired quantity of fine elements very evenly over the rolling surface, this operation being able, moreover, to be carried out in one only passes over a relatively large width, of the order of several meters, corresponding to the width covered by the asphalt spreading means for the establishment of the wearing course.
  • the subject of the invention is therefore a method of improving the surface qualities of a traffic lane produced by spreading, on a platform, a layer of aggregates coated in a bituminous binder, by means of a device for spreading moving at a forward speed along a longitudinal axis of the platform and transversely covering a certain working width.
  • a controlled quantity of fine-grained solid material is dispersed above it, which is deposited in a substantially homogeneous distribution, which is deposited on the binder film covering the upper face. of the asphalt layer, and the compaction is then carried out, the dispersion of the granular material being carried out with advancement, at a speed substantially equal to the longitudinal speed of advancement of the spreading device and at a distance low enough downstream of it so that the temperature of the binder remains high enough to allow the bonding of the dispersed grains upon contact with the binder film, said grains then being embedded in said binder film by the compaction carried out downstream, for the formation of a rough rolling surface.
  • the expression "traffic lane” applies to any platform covered with a wearing course made up of coated and compacted aggregates, the invention allowing the realization, not only roads or highways of all sizes, but also parking, taxiing, take-off / landing areas at airports, etc.
  • the dispersion of the granular material is carried out at a fairly short distance from the spreading means, above an area of the wearing course where the temperature of the binder is still at least 100 ° C. and , preferably of the order of 120 ° C to 140 °.
  • the granular material is slightly heated in order to avoid any risk of cooling of the binder film in contact with cold grains.
  • the dispersed granular material is a fine or very fine sand having, a particle size comprised between 100 and 500 ⁇ m, and the quantity of fine dispersed sand can range from 300 to 500 g / m 2 depending on the nature of the mix.
  • the granular material is dispersed, in a substantially homogeneous manner, in a closed space at least on its sides and extending downwards to a lower edge placed at a short distance from the wearing course and delimiting a rectangular orifice allowing the material dispersed in said space to be deposited regularly, as and when the wearing course is produced, over a width corresponding to the working width of the spreading device.
  • the invention also covers an installation for producing a wearing course comprising successively, in a direction of advance along a platform, means for spreading on it a layer of aggregates coated with a bituminous binder, a device for substantially homogeneous dispersion of a fine-grained solid material above the wearing course and compacting means, the device for dispersion moving substantially at the same speed as the spreading device and being kept downstream of it at a distance small enough to avoid a significant lowering of the temperature of the binder film covering the mixes and thus allow the bonding of the grains dispersed over the whole of the upper face of the wearing course then their embedding in said film by compaction.
  • the dispersing device comprises at least one member for projecting the granular material with a homogeneous distribution, in at least one dispersion sector widely open from at least one orifice supplied with granular material with a controlled flow. .
  • the sector for dispersing the material opens about 180 ° towards the rear of the spreading means relative to the direction of advance, the flow of grains projected per unit of time in the sector dispersion being adjusted as a function of the speed of advance of the asphalt spreading device.
  • the dispersing device comprises at least one reserve enclosure associated with supply means with a controlled flow opening at the center of at least one rotary hearth driven in rotation about a substantially vertical axis to the projection by centrifugal effect of the granular material, and the speed of rotation of which is adjusted so that, taking into account its density, the granular material is distributed homogeneously in a dispersion sector covering at least part of the width of the wearing course made in one pass by the spreading device.
  • each rotating sole disperses the granular material over part of the width of the wearing course, the dispersing device comprising a sufficient number of sole rotating spaced apart from each other, in order to cover the entire width of the wearing course produced in one pass by the spreading device.
  • each rotary sole is associated with means for limiting the extent of the dispersion sector inside a dihedral opening towards the rear from the axis of rotation of the rotary sole and on an angle of around 180 °.
  • the dispersing device is associated with means for limiting a substantially rectangular space covering at least part of the wearing course and extending above this over a height of protection against external disturbances, so that the dispersed material remains confined in this space.
  • the installation comprises, in known manner, a tractor movable on the platform and carrying a reserve of coated aggregates opening into spreading means extending transversely to the longitudinal axis over a working width.
  • the device for dispersing the granular material is integral, in displacement, with the tractor in order to maintain a short distance, behind the spreading means.
  • the dispersing device can advantageously be mounted on a support frame fixed to a rear part of the tractor and extending in a cantilevered manner towards the rear thereof, above the wearing course which comes from 'be carried out by the spreading device.
  • the support frame of the dispersing device is associated with a frame-shaped part having two lateral sides extending on either side of the dispersing device, parallel to the longitudinal axis and carrying each a light partition extending vertically from the level of the wearing course over a protective height.
  • the dispersing device is supplied with a controlled flow rate from a buffer tank, the latter itself being able to be supplied from bags which are opened as required to pour into the buffer tank.
  • FIGS. 1 and 2 there is shown schematically, respectively in side view and in plan view, the whole of an installation for producing a wearing course A on a platform B, comprising a spreading machine 1 of the conventional type, preferably mounted on a self-propelled tractor 10 which can move along a longitudinal axis x'x of the platform B.
  • the tractor 10 can be provided, as usual, with a receiving hopper 11 of a mass 2 of aggregates coated with a bituminous binder and it is provided, at its rear, with means 12 for spreading, on platform B, coated aggregates 2, so as to form a centered wearing course 21 on the longitudinal axis x'x and whose width and thickness are regulated by a finishing table 13 carried by the rear part of the tractor 10.
  • Such spreading means are well known and can be of different types making it possible, in general, to produce on the platform B a wearing course of desired thickness which is then compacted, for example by means of a vibrating roller.
  • bituminous binder which completely coats each element of the aggregate forms, after the spreading of the wearing course 21, a substantially continuous film which completely covers the upper face 22 of said layer 21, constituting the running surface.
  • This external and smooth binder film is gradually eliminated by the rolling of the vehicles but, however, decreases the adhesion at the start of commissioning.
  • this fine sand must, however, be dispersed in a very homogeneous way and avoiding, not only the excess thicknesses, but also the losses of sand outside the running surface.
  • the dispersion of fine sand is carried out as soon as the wearing course is produced and over its entire width, before any compaction. Therefore, the external binder film is at a temperature high enough to determine an immediate bonding of the dispersed sand as soon as it comes into contact with the upper face 22 of the asphalt layer 21 and the compaction carried out then causes the incrustation in the binder film of grains of sand thus stuck on it.
  • a dispersing device is used which is placed as close as possible to the spreading machine and moves at substantially the same speed as the latter. In this way, the external binder film covering the asphalt layer 21 does not have the time to cool down substantially before depositing the sandy material.
  • the dispersing device is preferably mounted directly on the rear part of the spreading machine and carries out the dispersion of the sand over the entire working width (L) thereof.
  • the dispersed sand immediately sticks to the whole of the upper face 22 of the wearing course 21 as and when it is produced.
  • the compaction carrying out the incrustation of the sand can be carried out at a certain distance from the spreading machine and, possibly, by successive bands because, in the event of wind, for example, the fine dispersed sand remains stuck on the surface 22 until the moment of compaction allowing its incorporation into the binder.
  • the dispersing device 4 is mounted on a support frame 5 carried by a bracket 52 fixed directly to the rear part of the tractor 11.
  • the dispersing device 4 advantageously comprises a reserve enclosure such as a small silo 41 having a hopper-shaped bottom 42 which opens, via a conduit 43, onto a rotating floor 44 consisting of a plate provided with blades and driven in rotation at a sufficient speed about a vertical axis 40 by a motor 45 preferably located below the rotary hearth 44 and connected to the silo 41 by support means not shown.
  • a reserve enclosure such as a small silo 41 having a hopper-shaped bottom 42 which opens, via a conduit 43, onto a rotating floor 44 consisting of a plate provided with blades and driven in rotation at a sufficient speed about a vertical axis 40 by a motor 45 preferably located below the rotary hearth 44 and connected to the silo 41 by support means not shown.
  • the silo 41 is filled with fine sand and, preferably, permanently supplied from a buffer tank 51 placed on the tractor 1 above the silo 41 which is fed by gravity.
  • the delivery of sand to silo 41 can also be done using a conveyor screw.
  • the sand can also be fed in the form of bags which are open above the buffer tank 5, the outlet of which is provided with a grid preventing accidental passage of paper.
  • the sand thus introduced into the silo 41 is poured through the conduit 43 onto the rotary hearth 44 driven in rotation at high speed and is therefore dispersed by centrifugal effect above the upper face 22 of the wearing course 21.
  • the supply channel 43 is provided with an adjustable shutter 46 with timed electronic control 47 making it possible to adjust the flow of sand falling on the floor 44 as a function of the speed of advance of the machine 1.
  • the material thus sprayed disperses, by contrifying effect, in a circular sector 61 centered on the vertical axis of the rotary hearth 44.
  • the dispersion sector 61 To bring the dispersion axis as close as possible to the finishing table 13, it is preferable for the dispersion sector 61 to open only towards the rear, at an angle of approximately 180 °.
  • the dispersing device 4 is advantageously provided with a deflector 48 placed at the level of the rotating hearth 44 and comprising two arms provided with orientable blades whose opening can be adjusted according to the speed and the dosage, in order to limit the projection of the sand onto a sector 61 of variable opening, of the order of 180 °.
  • the sand thus dispersed in a circular sector which moves longitudinally, is deposited on the surface 22 by forming a strip parallel to the axis x'x and the width of which depends on the centrifugal effect of the rotating hearth and can be, for example. example, 4 meters, which corresponds to a normal working width of a spreading machine.
  • Each rotating sole 44 must imperatively be designed to adapt to the relatively small mass of the very fine granular material which must be sprayed.
  • the dispersing means are placed in an enclosed space, sheltered from external disturbances.
  • the chassis 5 for supporting the dispersing means 4 comprises a platform 51 fixed on the bracket 52 and on which are mounted, on the one hand, the dispersing devices 4 and, on the other hand, a rectangular frame 54 extending horizontally towards the rear and carrying a light partition such as a tarpaulin 53 which extends vertically over a protective height h, substantially up to the upper face 22 of the wearing course 21.
  • the rectangular frame 54 can be covered with a tarpaulin or horizontal partition 55.
  • a closed space 50 which entirely covers a rectangular area of the upper face 22 of the wearing course extending over the entire width (L) produced in one pass by the device. spreading 12, 13 and over a length L 'corresponding to the maximum distance of projection of the grains of sand, taking into account their density and the centrifugal effect of the rotary hearth 44.
  • the sprayed grains therefore remain confined inside this closed space 50 which moves at the same speed as the spreading means 50.
  • Part of the sprayed grains is immediately deposited on the rolling surface 22 and another part can strike the longitudinal or transverse sides of the vertical wall 53 and is randomly returned towards the interior of the space 50 by dividing substantially homogeneously.
  • the dispersed material thus forms, inside the space 50, a cloud of grains in suspension which advances with the tractor 10 at the speed of spreading of the wearing course and whose lower part is denser and tends to stick to the upper face 22 covered with a binder film which has not had time to cool and is still at a temperature between 120 ° and 140 ° C.
  • Another advantage of the invention lies in the fact that this thin layer of fine sand encrusted in the binder film covering the wearing course reduces the brightness of the latter and thus the risk of dazzling motorists.
  • the binder film with the grains of sand incorporated therein, is gradually eliminated by the movement of vehicles, but by revealing the upper, irregular face, of the aggregates of the wearing course.
  • the invention therefore makes it possible to give the coating, as soon as it is produced and put into circulation, very clearly improved adhesion properties, in particular at moderate speed.
  • the spreading device 5 could bear directly, by wheels, on the asphalt layer 21 and be coupled to the rear of the tractor 11 or else constitute an independent self-propelled vehicle following the tractor 11 and placed a little behind the finisher 13, but at a distance small enough that the binder film covering the wearing course has not had time to cool down significantly.
  • the device for dispersing fine sand could consist of a hopper fixed to the rear of the tractor 10 and extending transversely over the entire width (L) of the asphalt layer produced by the spreading means. 12, 13, the bottom of this hopper being equipped with a screw making it possible to regularly distribute the fine sand poured into the hopper, above an elongated slot allowing a sand flow rate adjusted as a function of the forward speed tractor 10.
  • bituminous mixes can be obtained either hot or cold.
  • the proportion of fine dispersed sand must be adapted to the nature of the mix and can range, for example, from 300 +/- 50g / m 2 for a draining mix up to 500 +/- 50g / m 2 for a mix not draining.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Road Repair (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Road Paving Structures (AREA)
EP03292394A 2002-09-30 2003-09-29 Verfahren zur Verbesserung der Oberflächenqualität von Fahrbahnen und Vorrichtung zur Durchführung des Verfahrens Expired - Lifetime EP1403435B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0212092A FR2845100B1 (fr) 2002-09-30 2002-09-30 Procede d'amelioration des qualites de surface d'une voie de circulation et dispositif pour sa mise en oeuvre
FR0212092 2002-09-30

Publications (2)

Publication Number Publication Date
EP1403435A1 true EP1403435A1 (de) 2004-03-31
EP1403435B1 EP1403435B1 (de) 2008-08-27

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EP03292394A Expired - Lifetime EP1403435B1 (de) 2002-09-30 2003-09-29 Verfahren zur Verbesserung der Oberflächenqualität von Fahrbahnen und Vorrichtung zur Durchführung des Verfahrens

Country Status (5)

Country Link
EP (1) EP1403435B1 (de)
AT (1) ATE406480T1 (de)
DE (1) DE60323193D1 (de)
DK (1) DK1403435T3 (de)
FR (1) FR2845100B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103790096A (zh) * 2014-01-17 2014-05-14 青岛林川工程技术咨询有限公司 一种道路施工物料的布撒方法
CN109989324A (zh) * 2019-04-23 2019-07-09 嘉兴劲境电子商务有限公司 一种沥青浇筑碾压一体机
CN110208093A (zh) * 2019-06-28 2019-09-06 新密市万力实业发展有限公司 旋转式颗粒样品铺置器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1409840A1 (de) * 1961-11-01 1969-01-30 Anton Scheuerer Verfahren zum Aufbringen von Abstreumaterial auf bituminoese Fahrbahndecken
DE2027297A1 (de) * 1970-06-03 1971-12-16 Deutsche Asphalt GmbH, 6000 Frank fürt Gußasphalt Einbauvorrichtung
DE2740667A1 (de) * 1977-09-09 1979-03-15 Voegele Ag J Verfahren und vorrichtung zur erneuerung von beschaedigten fahrbahn- deckschichten
DE3834313A1 (de) * 1988-10-08 1990-04-12 Hermann Kirchner Gmbh & Co Kg Verfahren und vorrichtung zur herstellung eines gleisschotterplanums

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1409840A1 (de) * 1961-11-01 1969-01-30 Anton Scheuerer Verfahren zum Aufbringen von Abstreumaterial auf bituminoese Fahrbahndecken
DE2027297A1 (de) * 1970-06-03 1971-12-16 Deutsche Asphalt GmbH, 6000 Frank fürt Gußasphalt Einbauvorrichtung
DE2740667A1 (de) * 1977-09-09 1979-03-15 Voegele Ag J Verfahren und vorrichtung zur erneuerung von beschaedigten fahrbahn- deckschichten
DE3834313A1 (de) * 1988-10-08 1990-04-12 Hermann Kirchner Gmbh & Co Kg Verfahren und vorrichtung zur herstellung eines gleisschotterplanums

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103790096A (zh) * 2014-01-17 2014-05-14 青岛林川工程技术咨询有限公司 一种道路施工物料的布撒方法
CN109989324A (zh) * 2019-04-23 2019-07-09 嘉兴劲境电子商务有限公司 一种沥青浇筑碾压一体机
CN110208093A (zh) * 2019-06-28 2019-09-06 新密市万力实业发展有限公司 旋转式颗粒样品铺置器

Also Published As

Publication number Publication date
DK1403435T3 (da) 2008-12-15
FR2845100B1 (fr) 2004-12-17
FR2845100A1 (fr) 2004-04-02
EP1403435B1 (de) 2008-08-27
DE60323193D1 (de) 2008-10-09
ATE406480T1 (de) 2008-09-15

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