EP0418105A1 - Extensible screed for compacting and finishing roadcovering with liquid binder spreading means - Google Patents

Extensible screed for compacting and finishing roadcovering with liquid binder spreading means Download PDF

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Publication number
EP0418105A1
EP0418105A1 EP90402164A EP90402164A EP0418105A1 EP 0418105 A1 EP0418105 A1 EP 0418105A1 EP 90402164 A EP90402164 A EP 90402164A EP 90402164 A EP90402164 A EP 90402164A EP 0418105 A1 EP0418105 A1 EP 0418105A1
Authority
EP
European Patent Office
Prior art keywords
spreading
ramps
trough
ramp
finishing
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
EP90402164A
Other languages
German (de)
French (fr)
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EP0418105B1 (en
Inventor
Serge D'alimonte
Jean-Francois Patte
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SCREG Routes et Travaux Publics
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SCREG Routes et Travaux Publics
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Priority to AT90402164T priority Critical patent/ATE90751T1/en
Publication of EP0418105A1 publication Critical patent/EP0418105A1/en
Application granted granted Critical
Publication of EP0418105B1 publication Critical patent/EP0418105B1/en
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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
    • 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
    • E01C19/16—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 for applying or spreading liquid materials, e.g. bitumen slurries
    • E01C19/17—Application by spraying or throwing
    • E01C19/176—Spraying or throwing elements, e.g. nozzles; Arrangement thereof or supporting structures therefor, e.g. spray-bars
    • 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
    • E01C19/16—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 for applying or spreading liquid materials, e.g. bitumen slurries
    • E01C19/17—Application by spraying or throwing
    • E01C19/178—Elements or attachments for spreading-out or smoothing-down the applied material, e.g. brushes
    • 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
    • E01C19/22—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 consolidating or finishing laid-down unset materials
    • E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E01C19/40—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers
    • 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
    • E01C19/4833—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 with tamping or vibrating means for consolidating or finishing, e.g. immersed vibrators, with or without non-vibratory or non-percussive pressing or smoothing means
    • 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
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/10—Heated screeds
    • 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
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/14—Extendable screeds
    • E01C2301/16—Laterally slidable screeds

Definitions

  • the invention relates to a table for compacting and finishing a coating on a road construction site, of adjustable width and comprising means for spreading liquid binder.
  • the compacting and finishing table has planar shoes which are associated with heating and vibrating means and which come into contact with the upper surface of the coating layer deposited on a roadway being prepared or repair, to achieve its compaction and to obtain an upper surface constituting the rolling surface of the road as flat as possible.
  • the compacting and finishing tables are generally fixed at the rear of devices called finishers which ensure spreading over a relatively constant thickness, thanks to devices such as worm devices, of the mixture of aggregate and bitumen whose table attached to the rear of the paver ensures compaction and smoothing.
  • the mixture of aggregates and bitumen is a bituminous mix consisting of pebbles and pulverulent material mixed in predetermined amounts with bitumen.
  • a layer of liquid bituminous binder which can be constituted by a bituminous emulsion.
  • a binder spreader comprising a reserve tank and a spreading ramp is passed over the pavement, prior to the passage of the paver.
  • the binder spreading ramps have nozzles distributed along the length of the ramp arranged in the transverse direction ensuring the distribution of jets of liquid binder of flat shape which are substantially juxtaposed at the upper surface of the roadway, so as to ensure spreading a constant amount of bitumen over the entire width of the roadway.
  • the constant dosing of the binder is ensured by the servo-control of the flow rate of the dosing pump to the forward speed of the spreader.
  • finishing tables and spreaders can be used to carry out road works on pavements of variable width, the covering layer being able to be deposited in a single pass over the entire width of the pavement or in adjacent strips juxtaposed.
  • the spreaders must include ramps capable of spreading the layer of bituminous binder over a greater or lesser width.
  • the most recent adjustable width bituminous binder spreading booms are constituted by telescopic assemblies or by two half-booms arranged with a very small spacing in the longitudinal direction which are connected to displacement means allowing them to be brought closer or closer together. move away in the transverse direction to decrease or increase the spreading width of the binder.
  • bitumen flow rate substantially equal to twice the required flow rate, insofar as the nozzles of the parts of the two half-ramps coming into overlap are supplied with bitumen in the same way as the other nozzles of the two half-ramps. It is therefore necessary to ensure the automatic closing of the nozzles and the cutting of the jets, on one of the two half-ramps, in its part overlapping with respect to the other half-ramp. It is therefore necessary to provide a specific device for cutting the jets and adjusting the flow rate of the bitumen pump supplying the corresponding half-boom, as a function of the position of this half-boom.
  • Bituminous binder spreaders that can be used for variable road widths are therefore relatively complex mechanical and / or hydraulic devices.
  • These compacting tables have a central part itself consisting of one or more elements and two side parts mounted movable in the transverse direction of the table, in one direction and in the other, relative to the central part. Both the central part of the finishing table and the side parts are equipped with heating and vibrating devices for the smoothing pads.
  • These devices for producing a coating of a new type must include a spreading ramp placed in a very precise position at the rear of the device, before the praline aggregate discharge area.
  • the object of the invention is therefore to propose a table for compacting and finishing a coating on a road construction site, with adjustable working width, comprising at least one central part and two lateral parts mounted movable in the transverse direction of the table perpendicular to its direction of advance on the site, in one direction and in the other with respect to the central part and provided with vibrating means ensuring the compaction and heating means, this compaction table comprising means spreading liquid binder of simple structure allowing adjustment of the spreading width.
  • the compacting table according to the invention comprises two spreading ramps supplied with liquid bituminous binder each fixed on a movable lateral part of the table, in a transverse arrangement parallel to the table and with a certain longitudinal spacing, these ramps provided with injection nozzles distributed along their length in the transverse direction constituting a spreading assembly adjustable in width, according to the setting of the table, over the entire working width of the table.
  • FIG. 1 we can see a finishing and compacting table comprising a central part 1 made up of two elements 1a and 1b juxtaposed and equipped with means for vibrating and heating means for the flat lower plates constituting the pads of the part central 1 coming into contact with the road surface 2 which is compacted and smoothed.
  • the elements 1a and 1b of the central part of the finishing table comprise fittings 3a and 3b on which are fixed telescopic columns 4a and 4b respectively.
  • the left and right extensions 6a and 6b are identical and arranged symmetrically with respect to the median plane of the finishing table.
  • extension 6a Only the lateral extension 6a will be described below, the extension 6b being identical as regards its constituent elements and its structure.
  • the frame of the extension 6a comprises a pad 8a on which is mounted a vibration assembly 9a intended to ensure the compaction of the coating 2, by means of the pad 8a.
  • a gas heating ramp ensuring the heating of the coating 2, during its compaction and its smoothing.
  • the rod of an actuating cylinder 10a makes it possible to move in the transverse direction the lateral extension 6a, in one direction and in the other, so as to distance or bring this lateral part 6a from the central part 1, to adjust the working width of the compaction and finishing table.
  • the pads 8a and 8b of the lateral parts 6a and 6b are offset in the longitudinal direction relative to the pads of the central part, in order to allow the width to be adjusted.
  • FIG 2 there is shown schematically, a compacting and finishing table according to the invention comprising a central part 11 and two side parts 12a and 12b mounted movable in the transverse direction relative to the central part 11, in one way and the other, to vary the working width of the table.
  • Each of the lateral extensions 12a and 12b has a fitting respectively 14a and 14b fixed on its external lateral end part by a fixing lug such as 15a.
  • the fittings 14a and 14b carry, by means of suspension arms 16a and 16b, two half-ramps for injecting bituminous binder 18a and 18b.
  • the two half-ramps 18a and 18b parallel to each other are arranged in transverse directions and placed in positions slightly offset in the longitudinal direction corresponding to the direction of progress of the site defined by arrow 20.
  • Each of the ramps 18a and 18b has a set of nozzles 21 regularly distributed along the length of the ramp and each delivering a triangular flat jet 22.
  • the arrangement of the nozzles 21 along the length of the ramps 18a and 18b and the height of these ramps above the surface of the roadway to be covered corresponding to the ground clearance of the binder spreading device are such that the jets 22 are located exactly juxtaposed, when they come into contact with the upper surface of the road. A total covering of the surface of the roadway is thus obtained, by a layer of binder of constant thickness in the transverse direction.
  • the flow rate of the binder dosing pump is controlled by the speed of advancement of the table so that the binder dosage remains constant at the desired value.
  • FIGS. 2 and 3 describe the means for recovering the bitumen in the area of overlap of the two half-ramps 18a and 18b.
  • these include an overlap area of variable length L.
  • the device according to the invention comprises bitumen recovery means making it possible to avoid spreading a layer of bitumen of double thickness in the overlap zone of length L.
  • the ramp 18b carries, by means of fixing lugs 24, a bitumen recovery trough 25 which is arranged parallel to the ramps 18a and 18b and placed directly above the ramp 18a, that is to say in a position slightly shifted forward in the longitudinal direction, relative to the ramp 18b.
  • the gauge 25 has a length substantially equal to the length of the half-ramp 18b and is placed over the entire length of this half-ramp.
  • the gauge 25 includes reheating means not shown ensuring the maintenance in the liquid state of the bitumen discharged by the nozzles 21 of the ramp 18a in the overlap zone.
  • the liquid bitumen poured into the trough 25 is recovered by a pumping pipe 26 connected to a pump 27 ensuring the reinjection of the bitumen into a collection tank via an outlet pipe 28.
  • the flat jets 22 being of triangular shape, the spreading of these jets at the upper level of the roadway can produce extra thicknesses of the binder layer in certain relative arrangements of the half-ramps 18a and 18b where there is a certain overlap of the two jets 22 coming from the nozzle located at the end of the half-ramp 18b located towards the central part of the finishing table and from the first nozzle 21 of the ramp 18a whose jet is not intercepted by the trough 25 .
  • a secondary trough 30 is slidably mounted in the longitudinal direction of the trough 25 and whose displacements as a function of the displacements of the trough 25 and of the half-ramp 18b are adjusted mechanically or electronically. that so as to partially intercept the first jet 22a spilled by the ramp 18a to avoid overlapping with the last jet 22b discharged by the ramp 18b.
  • the secondary trough 30 flows inside the main trough 25 which recovers the bitumen intercepted on the jet 22a.
  • the compacting and finishing table according to the invention can be fixed to the rear of the paver and means for pouring and spreading the hot mixes are fixed on the paver so as to pour the hot mixes between the ramps 18a, 18b and the paver. In this way, the hot mixes come into contact with the bituminous emulsion before it breaks on the pavement floor.
  • praline aggregates prepared cold or hot may be poured and spread between the ramps 18a, 18b and the compaction and smoothing the table according to the invention.
  • the operations of spreading the binder, spreading the praline aggregates and compacting and smoothing the coating can be carried out in a very short time and perfectly determined by the position of the ramps relative to the smoothing elements of the table. finishing and by the speed of advancement of the table corresponding to the speed of advancement of the machine on which this table is fixed.
  • the main advantages of the compacting and finishing table according to the invention are therefore to ensure an automatic adjustment of the spreading width. dage of a bituminous binder, depending on the working width of a finishing table.
  • the pressure in the ramp elements of the device according to the invention remains constant for a given flow rate, insofar as none of the bitumen jets is cut off during the adjustment of the ramp. For the same reason, there are no irregularities in the distribution of the binder on the road.
  • finishing and compacting table according to the invention comprising an adjustable bituminous binder spreading ramp can be associated both with a conventional type finisher and with machines of any type allowing the production of a coating or '' a surface coating on a roadway.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Road Repair (AREA)
  • Catching Or Destruction (AREA)

Abstract

The screed (table) for compacting and finishing comprises a central element (11) and two lateral elements (12a, 12b) which are movable in the transverse direction relative to the central element (11). Each of the lateral parts (12a, 12b) of the compacting screed (table) carries a boom (18a, 18b) for spraying binder. The booms (18a, 18b) form a spraying assembly whose width is variable as a function of the width of the compacting screed (table). A trough (25), integral with one of the booms (18a) and arranged substantially over its entire length, makes it possible to recover the bitumen jets (22) of the boom (18a) in the overlap zone of length L between the booms (18a) and (18b). <IMAGE>

Description

L'invention concerne une table de compactage et de finissage d'un revêtement sur un chantier routier, à largeur réglable et comportant des moyens de répandage de liant liquide.The invention relates to a table for compacting and finishing a coating on a road construction site, of adjustable width and comprising means for spreading liquid binder.

On connaît des tables de compactage et de finissage d'un revêtement routier qui sont fixées à la partie arrière d'un dispositif de répandage ou d'élabo­ration du matériau de revêtement qui est généralement constitué par un mélange de granulats et de bitume.There are known compacting and finishing tables for a road surface which are fixed to the rear part of a device for spreading or preparing the coating material which generally consists of a mixture of aggregates and bitumen.

La table de compactage et de finissage compor­te des patins de forme plane qui sont associés à des moyens de chauffage et de mise en vibration et qui viennent en contact avec la surface supérieure de la couche de revêtement déposée sur une chaussée en cours d'élaboration ou de réfection, pour réaliser son compac­tage et pour obtenir une surface supérieure constituant la surface de roulement de la chaussée la plus plane possible.The compacting and finishing table has planar shoes which are associated with heating and vibrating means and which come into contact with the upper surface of the coating layer deposited on a roadway being prepared or repair, to achieve its compaction and to obtain an upper surface constituting the rolling surface of the road as flat as possible.

Les tables de compactage et de finissage sont généralement fixées à l'arrière de dispositifs appelés finisseurs qui assurent le répandage sur une épaisseur relativement constante, grâce à des dispositifs tels que des dispositifs à vis sans fin, du mélange de granulat et de bitume dont la table fixée à l'arrière du finis­seur assure le compactage et le lissage.The compacting and finishing tables are generally fixed at the rear of devices called finishers which ensure spreading over a relatively constant thickness, thanks to devices such as worm devices, of the mixture of aggregate and bitumen whose table attached to the rear of the paver ensures compaction and smoothing.

Dans la plupart des cas, le mélange de granu­lats et de bitume est un enrobé bitumineux constitué de cailloux et de matériau pulvérulent mélangés en quanti­tés déterminées avec du bitume.In most cases, the mixture of aggregates and bitumen is a bituminous mix consisting of pebbles and pulverulent material mixed in predetermined amounts with bitumen.

Avant de déposer la couche de matériaux enro­bés sur la surface supérieure de la chaussée, il est souvent nécessaire de répandre sur cette surface, une couche de liant bitumineux liquide qui peut être consti­tuée par une émulsion bitumineuse.Before depositing the layer of coated materials on the upper surface of the roadway, it is often necessary to spread on this surface, a layer of liquid bituminous binder which can be constituted by a bituminous emulsion.

Pour réaliser cette couche d'accrochage, on fait passer sur la chaussée, préalablement au passage du finisseur, une répandeuse de liant comportant une citer­ne de réserve et une rampe de répandage.To achieve this bonding layer, a binder spreader comprising a reserve tank and a spreading ramp is passed over the pavement, prior to the passage of the paver.

Il est nécessaire de déposer sur toute la lar­geur de la chaussée une couche de liant dont l'épaisseur soit la plus constante possible, aussi bien dans la di­rection transversale de la chaussée que dans la direc­tion longitudinale d'avancement du chantier.It is necessary to deposit over the entire width of the roadway a layer of binder whose thickness is as constant as possible, both in the transverse direction of the roadway and in the longitudinal direction of progress of the site.

Les rampes de répandage de liant comportent des buses réparties suivant la longueur de la rampe disposées dans la direction transversale assurant la distribution de jets de liant liquide de forme plate qui sont sensiblement juxtaposés au niveau de la surface supérieure de la chaussée, de manière à assurer le répandage d'une quantité constante de bitume sur toute la largeur de la chaussée.The binder spreading ramps have nozzles distributed along the length of the ramp arranged in the transverse direction ensuring the distribution of jets of liquid binder of flat shape which are substantially juxtaposed at the upper surface of the roadway, so as to ensure spreading a constant amount of bitumen over the entire width of the roadway.

Le dosage constant du liant est assuré par l'asservissement du débit de la pompe doseuse à la vitesse d'avancement de la répandeuse.The constant dosing of the binder is ensured by the servo-control of the flow rate of the dosing pump to the forward speed of the spreader.

Les tables de finissage et les répandeuses peuvent être utilisées pour effectuer des travaux rou­tiers sur des chaussées de largeur variable, la couche de revêtement pouvant être déposée en un seul passage sur toute la largeur de la chaussée ou suivant des bandes adjacentes juxtaposées.The finishing tables and spreaders can be used to carry out road works on pavements of variable width, the covering layer being able to be deposited in a single pass over the entire width of the pavement or in adjacent strips juxtaposed.

Il est donc nécessaire de disposer de tables de finissage dont la largeur de travail soit réglable entre certaines limites permettant d'effectuer une très large gamme de travaux routiers.It is therefore necessary to have finishing tables whose working width is adjustable between certain limits allowing a very wide range of road works to be carried out.

De même, les répandeuses doivent comporter des rampes pouvant effectuer l'étalement de la couche de liant bitumineux sur une largeur plus ou moins importan­te.Likewise, the spreaders must include ramps capable of spreading the layer of bituminous binder over a greater or lesser width.

En général, et jusqu'à présent, la variation de largeur de répandage du liant. est assurée par l'ou­verture ou la fermeture des jets de la rampe avec l'in­convénient d'une variation en "escalier".In general, and so far, the variation in the spreading width of the binder. is ensured by the opening or closing of the jets of the ramp with the disadvantage of a variation in "staircase".

Les rampes de répandage de liant bitumineux à largeur réglable les plus récentes sont constituées par des ensembles télescopiques ou par deux demi-rampes disposées avec un très faible espacement dans la direc­tion longitudinale qui sont reliées à des moyens de déplacement permettant de les rapprocher ou de les éloigner dans la direction transversale pour diminuer ou augmenter la largeur de répandage du liant.The most recent adjustable width bituminous binder spreading booms are constituted by telescopic assemblies or by two half-booms arranged with a very small spacing in the longitudinal direction which are connected to displacement means allowing them to be brought closer or closer together. move away in the transverse direction to decrease or increase the spreading width of the binder.

Pendant le déplacement des demi-rampes, leurs parties en vis-à-vis située à la partie centrale de la rampe sont susceptibles de déverser sur la chaussée un débit de bitume sensiblement égal au double du débit requis, dans la mesure où les buses des parties des deux demi-rampes venant en recouvrement sont alimentées en bitume de la même manière que les autres buses des deux demi-rampes. Il est donc nécessaire d'assurer la ferme­ture automatique des buses et la coupure des jets, sur l'une des deux demi-rampes, dans sa partie venant en recouvrement par rapport à l'autre demi-rampe. Il est donc nécessaire de prévoir un dispositif particulier de coupure des jets et de régler le débit de la pompe de bitume alimentant la demi-rampe correspondante, en fonction de la position de cette demi-rampe.During the movement of the half-ramps, their opposite parts located at the central part of the ramp are likely to pour onto the roadway a bitumen flow rate substantially equal to twice the required flow rate, insofar as the nozzles of the parts of the two half-ramps coming into overlap are supplied with bitumen in the same way as the other nozzles of the two half-ramps. It is therefore necessary to ensure the automatic closing of the nozzles and the cutting of the jets, on one of the two half-ramps, in its part overlapping with respect to the other half-ramp. It is therefore necessary to provide a specific device for cutting the jets and adjusting the flow rate of the bitumen pump supplying the corresponding half-boom, as a function of the position of this half-boom.

Les répandeuses de liant bitumineux utilisa­bles pour des largeurs de chaussée variables sont donc des dispositifs relativement complexes sur le plan mécanique et/ou hydraulique.Bituminous binder spreaders that can be used for variable road widths are therefore relatively complex mechanical and / or hydraulic devices.

Il est connu également de réaliser les tables de compactage et de finissage de revêtement routier, de manière que ces tables soient facilement réglables en largeur entre deux limites correspondant aux largeurs extrêmes des chaussées sur lesquelles on peut effectuer le compactage et le lissage d'un revêtement.It is also known to produce the compacting and finishing tables for road surfaces, so that these tables are easily adjustable in width between two limits corresponding to the widths. extremes of the pavements on which one can carry out the compaction and smoothing of a coating.

Ces tables de compactage comportent une partie centrale elle-même constituée d'un ou plusieurs éléments set deux parties latérales montées mobiles dans la direc­tion transversale de la table, dans un sens et dans l'autre, par rapport à la partie centrale. Aussi bien la partie centrale de la table de finissage que les parties latérales sont équipées de dispositifs de chauffage et de mise en vibration des patins de lissage.These compacting tables have a central part itself consisting of one or more elements and two side parts mounted movable in the transverse direction of the table, in one direction and in the other, relative to the central part. Both the central part of the finishing table and the side parts are equipped with heating and vibrating devices for the smoothing pads.

On connaît des procédés de réalisation de revêtement routier qui nécessitent d'étaler ce revête­ment constitué par des enrobés à chaud, sur le liant bitumineux, très rapidement après son répandage, avant la rupture de l'émulsion ou l'évaporation du solvant du bitume.There are known processes for producing road surfaces which require spreading this surface coating consisting of hot mixes, on the bituminous binder, very quickly after its spreading, before the emulsion breaks or the bitumen solvent evaporates.

Pour mettre en oeuvre un tel procédé, on a proposé de placer une rampe de répandage sur un finis­seur, dans une position située légèrement à l'avant du dispositif de répandage et d'étalement des enrobés chauds.To implement such a method, it has been proposed to place a spreading ramp on a finisher, in a position situated slightly in front of the spreading and spreading device for hot mixes.

La conception d'un tel finisseur est complexe, dans la mesure où l'on ne dispose que d'une place rédui­te pour placer la rampe de répandage de liant. En outre, la conception du finisseur est encore plus complexe lorsqu'il est nécessaire de réaliser la rampe sous une forme permettant un réglage de la largeur de répandage.The design of such a paver is complex, since there is only a reduced space for placing the binder spreading ramp. In addition, the design of the paver is even more complex when it is necessary to make the ramp in a form allowing adjustment of the spreading width.

On connaît également un procédé et des dispo­sitifs décrits dans le brevet n° 89-09893 déposé par la Société SCREG Routes et Travaux Publics le 21 juillet 1989, qui permettent de réaliser un enduit superficiel sur la surface d'une chaussée, par répandage de granu­lats pralinés, c'est-à-dire de granulats recouverts d'une couche de bitume épaissie par de la matière pulvé­rulente, sur une couche de liant bitumineux dont l'épaisseur est sensiblement supérieure à l'épaisseur d'une couche d'accrochage d'un revêtement constitué par des enrobés.There is also known a process and devices described in patent n ° 89-09893 filed by the company SCREG Routes et Travaux Publics on July 21, 1989, which make it possible to produce a surface coating on the surface of a roadway, by spreading aggregates pralines, that is to say aggregates covered with a layer of bitumen thickened by pulverulent material, on a layer of bituminous binder whose the thickness is substantially greater than the thickness of a bonding layer of a coating consisting of coated materials.

Dans un tel procédé, il est nécessaire de réaliser successivement les opérations de répandage du liant bitumineux, de répandage des granulats pralinés, de compactage et de finissage, en un temps très court (inférieur à 5 secondes) et parfaitement déterminé.In such a process, it is necessary to successively carry out the operations of spreading the bituminous binder, spreading the praline aggregates, compacting and finishing, in a very short time (less than 5 seconds) and perfectly determined.

Pour la mise en oeuvre de ce procédé, on peut utiliser un dispositif réalisant la fabrication à froid des granulats pralinés sur le chantier même ainsi que le répandage du liant, le répandage des granulats, le com­pactage et le lissage de la couche d'enduit.For the implementation of this process, it is possible to use a device carrying out the cold production of praline aggregates on the site itself as well as the spreading of the binder, the spreading of the aggregates, the compacting and the smoothing of the coating layer.

On peut également utiliser un dispositif ali­menté en granulats pralinés élaborés à chaud et effec­tuant le transport de ces granulats pralinés jusqu'à la partie du dispositif située immédiatement à l'avant d'une table de finissage portée par le châssis du dispo­sitif.One can also use a device supplied with praline aggregates prepared hot and carrying out the transport of these praline aggregates to the part of the device located immediately in front of a finishing table carried by the chassis of the device.

Ces dispositifs de réalisation d'un enduit d'un nouveau type doivent comporter une rampe de répan­dage placée dans une position bien précise à l'arrière du dispositif, avant la zone de déversement des granu­lats pralinés.These devices for producing a coating of a new type must include a spreading ramp placed in a very precise position at the rear of the device, before the praline aggregate discharge area.

Comme dans le cas des finisseurs, la concep­tion de tels dispositifs est très nettement compliquée dans la mesure où il faut utiliser des rampes à largeur de travail réglable dont la disposition sur la machine et le réglage posent des problèmes techniques difficiles à résoudre.As in the case of pavers, the design of such devices is very clearly complicated since it is necessary to use ramps with adjustable working width, the arrangement of which on the machine and the adjustment pose technical problems which are difficult to solve.

Jusqu'ici, on ne connaissait pas de table de compactage et de finissage destinée à être associée à un finisseur ou à une machine de réalisation d'enduit superficiel de chaussée qui comporte des moyens de répandage de liant bitumineux liquide suivant une lar­geur variable.Up to now, no compacting and finishing table has been known which is intended to be associated with a finisher or a machine for producing a surface coating of pavement which includes means for spreading of liquid bituminous binder according to a variable width.

Le but de l'invention est donc de proposer une table de compactage et de finissage d'un revêtement sur un chantier routier, à largeur de travail réglable, comportant au moins une partie centrale et deux parties latérales montées mobiles dans la direction transversale de la table perpendiculaire à sa direction d'avancement sur le chantier, dans un sens et dans l'autre par rap­port à la partie centrale et munies de moyens de mise en vibration assurant le compactage et de moyens de chauf­fage, cette table de compactage comportant des moyens de répandage de liant liquide de structure simple permet­tant un réglage en largeur du répandage.The object of the invention is therefore to propose a table for compacting and finishing a coating on a road construction site, with adjustable working width, comprising at least one central part and two lateral parts mounted movable in the transverse direction of the table perpendicular to its direction of advance on the site, in one direction and in the other with respect to the central part and provided with vibrating means ensuring the compaction and heating means, this compaction table comprising means spreading liquid binder of simple structure allowing adjustment of the spreading width.

Dans ce but, la table de compactage suivant l'invention comporte deux rampes de répandage alimentées en liant bitumineux liquide fixées chacune sur une partie latérale mobile de la table, dans une disposition transversale parallèle à la table et avec un certain espacement longitudinal, ces rampes munies de buses d'injection réparties suivant leur longueur dans la direction transversale constituant un ensemble de répan­dage réglable en largeur, en fonction du réglage de la table, sur toute la largeur de travail de la table.For this purpose, the compacting table according to the invention comprises two spreading ramps supplied with liquid bituminous binder each fixed on a movable lateral part of the table, in a transverse arrangement parallel to the table and with a certain longitudinal spacing, these ramps provided with injection nozzles distributed along their length in the transverse direction constituting a spreading assembly adjustable in width, according to the setting of the table, over the entire working width of the table.

Afin de bien faire comprendre l'invention, on va maintenant décrire, à titre d'exemple non limitatif, en se référant aux figures jointes en annexe, une table de compactage et de finissage suivant l'art antérieur et une table de compactage et de finissage suivant l'inven­tion comportant des rampes de répandage de liant à largeur réglable.

  • La figure 1 est une vue en perspective d'une table de finissage suivant l'art antérieur.
  • La figure 2 est une vue en perspective d'une table de finissage suivant l'invention comportant des rampes de répandage de liant à largeur réglable.
  • La figure 3 est une vue en perspective des rampes de répandage de la table de compactage et de finissage représentée sur la figure 2.
In order to clearly understand the invention, a description will now be given, by way of nonlimiting example, with reference to the appended figures, a compacting and finishing table according to the prior art and a compacting and finishing according to the invention comprising binder spreading ramps with adjustable width.
  • Figure 1 is a perspective view of a finishing table according to the prior art.
  • Figure 2 is a perspective view of a finishing table according to the invention comprising binder spreading ramps with adjustable width.
  • FIG. 3 is a perspective view of the spreading ramps of the compacting and finishing table shown in FIG. 2.

Sur la figure 1, on voit une table de finis­sage et de compactage comportant une partie centrale 1 constituée de deux éléments 1a et 1b juxtaposés et équi­pés de moyens de mise en vibration et de moyens de chauffage des plaques inférieures planes constituant les patins de la partie centrale 1 venant en contact avec le revêtement routier 2 dont on effectue le compactage et le lissage.In FIG. 1, we can see a finishing and compacting table comprising a central part 1 made up of two elements 1a and 1b juxtaposed and equipped with means for vibrating and heating means for the flat lower plates constituting the pads of the part central 1 coming into contact with the road surface 2 which is compacted and smoothed.

Les éléments 1a et 1b de la partie centrale de la table de finissage comportent des ferrures 3a et 3b sur lesquelles sont fixées des colonnes télescopiques respectivement 4a et 4b.The elements 1a and 1b of the central part of the finishing table comprise fittings 3a and 3b on which are fixed telescopic columns 4a and 4b respectively.

A l'extrémité extérieure des parties mobiles des colonnes télescopiques 4a et 4b sont fixées des ferrures 5a et 5b respectivement constituant une partie de l'armature des extensions gauche et droite de la table de finissage désignées respectivement par les repères 6a et 6b.At the outer end of the mobile parts of the telescopic columns 4a and 4b are fixed fittings 5a and 5b respectively constituting a part of the frame of the left and right extensions of the finishing table designated respectively by the references 6a and 6b.

Les extensions gauche et droite 6a et 6b sont identiques et disposées de manière symétrique par rap­port au plan médian de la table de finissage.The left and right extensions 6a and 6b are identical and arranged symmetrically with respect to the median plane of the finishing table.

On décrira ci-dessous uniquement l'extension latérale 6a, l'extension 6b étant identique quant à ses éléments constitutifs et à sa structure.Only the lateral extension 6a will be described below, the extension 6b being identical as regards its constituent elements and its structure.

L'armature de l'extension 6a comporte un patin 8a sur lequel est monté un ensemble de mise en vibration 9a destiné à assurer le compactage du revêtement 2, par l'intermédiaire du patin 8a.The frame of the extension 6a comprises a pad 8a on which is mounted a vibration assembly 9a intended to ensure the compaction of the coating 2, by means of the pad 8a.

A l'intérieur du patin 8a est également monté une rampe de chauffage à gaz assurant le réchauffage du revêtement 2, pendant son compactage et son lissage.Inside the pad 8a is also mounted a gas heating ramp ensuring the heating of the coating 2, during its compaction and its smoothing.

La tige d'un vérin d'actionnement 10a permet de déplacer dans la direction transversale l'extension latérale 6a, dans un sens et dans l'autre, de manière à éloigner ou à rapprocher cette partie latérale 6a de la partie centrale 1, pour effectuer un réglage de la largeur de travail de la table de compactage et de finissage.The rod of an actuating cylinder 10a makes it possible to move in the transverse direction the lateral extension 6a, in one direction and in the other, so as to distance or bring this lateral part 6a from the central part 1, to adjust the working width of the compaction and finishing table.

Les patins 8a et 8b des parties latérales 6a et 6b sont décalés dans la direction longitudinale par rapport aux patins de la partie centrale, afin de per­mettre le réglage en largeur.The pads 8a and 8b of the lateral parts 6a and 6b are offset in the longitudinal direction relative to the pads of the central part, in order to allow the width to be adjusted.

Sur la figure 2, on a représenté de manière schématique, une table de compactage et de finissage suivant l'invention comportant une partie centrale 11 et deux parties latérales 12a et 12b montées mobiles dans la direction transversale par rapport à la partie cen­trale 11, dans un sens et dans l'autre, afin de faire varier la largeur de travail de la table.In Figure 2, there is shown schematically, a compacting and finishing table according to the invention comprising a central part 11 and two side parts 12a and 12b mounted movable in the transverse direction relative to the central part 11, in one way and the other, to vary the working width of the table.

Chacune des extensions latérales 12a et 12b comporte une ferrure respectivement 14a et 14b fixée sur sa partie d'extrémité latérale externe par une patte de fixation telle que 15a.Each of the lateral extensions 12a and 12b has a fitting respectively 14a and 14b fixed on its external lateral end part by a fixing lug such as 15a.

Les ferrures 14a et 14b portent, par l'inter­médiaire de bras de suspension 16a et 16b deux demi-­rampes d'injection de liant bitumineux 18a et 18b. Les deux demi-rampes 18a et 18b parallèles l'une par rapport à l'autre sont disposées dans des directions transversa­les et placées dans des positions légèrement décalées dans la direction longitudinale correspondant à la di­rection d'avancement du chantier définie par la flèche 20.The fittings 14a and 14b carry, by means of suspension arms 16a and 16b, two half-ramps for injecting bituminous binder 18a and 18b. The two half-ramps 18a and 18b parallel to each other are arranged in transverse directions and placed in positions slightly offset in the longitudinal direction corresponding to the direction of progress of the site defined by arrow 20.

Chacune des rampes 18a et 18b comporte un jeu de buses 21 régulièrement réparties suivant la longueur de la rampe et délivrant chacune un jet plat de forme triangulaire 22.Each of the ramps 18a and 18b has a set of nozzles 21 regularly distributed along the length of the ramp and each delivering a triangular flat jet 22.

La disposition des buses 21 suivant la lon­gueur des rampes 18a et 18b et la hauteur de ces rampes au-dessus de la surface de la chaussée à recouvrir correspondant à la garde au sol du dispositif de répan­dage de liant sont telles que les jets 22 se trouvent exactement juxtaposés, au moment où ils entrent en contact avec la surface supérieure de la chaussée. On obtient ainsi un recouvrement total de la surface de la chaussée, par une couche de liant d'épaisseur constante suivant la direction transversale.The arrangement of the nozzles 21 along the length of the ramps 18a and 18b and the height of these ramps above the surface of the roadway to be covered corresponding to the ground clearance of the binder spreading device are such that the jets 22 are located exactly juxtaposed, when they come into contact with the upper surface of the road. A total covering of the surface of the roadway is thus obtained, by a layer of binder of constant thickness in the transverse direction.

Le débit de la pompe doseuse à liant est asservi à la vitesse d'avancement de la table de telle sorte que le dosage en liant reste constant à la valeur désirée.The flow rate of the binder dosing pump is controlled by the speed of advancement of the table so that the binder dosage remains constant at the desired value.

On va maintenant se reporter aux figures 2 et 3 pour décrire les moyens de récupération du bitume dans la zone de recouvrement des deux demi-rampes 18a et 18b.We will now refer to FIGS. 2 and 3 to describe the means for recovering the bitumen in the area of overlap of the two half-ramps 18a and 18b.

Suivant la position relative des rampes 18a et 18b, celles-ci comportent une zone de recouvrement d'une longueur L variable.Depending on the relative position of the ramps 18a and 18b, these include an overlap area of variable length L.

Le dispositif suivant l'invention comporte des moyens de récupération de bitume permettant d'éviter l'étalement d'une couche de bitume d'épaisseur double dans la zone de recouvrement de longueur L.The device according to the invention comprises bitumen recovery means making it possible to avoid spreading a layer of bitumen of double thickness in the overlap zone of length L.

La rampe 18b porte, par l'intermédiaire de pattes de fixation 24, une auge de récupération de bitume 25 qui est disposée parallèlement aux rampes 18a et 18b et placée à l'aplomb de la rampe 18a, c'est-à-­dire dans une position légèrement décalée vers l'avant dans la direction longitudinale, par rapport à la rampe 18b.The ramp 18b carries, by means of fixing lugs 24, a bitumen recovery trough 25 which is arranged parallel to the ramps 18a and 18b and placed directly above the ramp 18a, that is to say in a position slightly shifted forward in the longitudinal direction, relative to the ramp 18b.

L'auge 25 présente une longueur sensiblement égale à la longueur de la demi-rampe 18b et se trouve placée sur toute la longueur de cette demi-rampe.The gauge 25 has a length substantially equal to the length of the half-ramp 18b and is placed over the entire length of this half-ramp.

De cette manière, les jets plats 22a déversés par la rampe 18a dans la zone de recouvrement de lon­gueur L sont interceptés par l'auge 25 qui évite leur répandage sur la surface de la chaussée et assure leur récupération. L'auge 25 comporte des moyens de réchauf­fage non représentés assurant le maintien à l'état liquide du bitume déversé par les buses 21 de la rampe 18a dans la zone de recouvrement.In this way, the flat jets 22a discharged by the ramp 18a into the overlap zone of length L are intercepted by the trough 25 which prevents their spreading over the surface of the roadway and ensures their recovery. The gauge 25 includes reheating means not shown ensuring the maintenance in the liquid state of the bitumen discharged by the nozzles 21 of the ramp 18a in the overlap zone.

Le bitume liquide déversé dans l'auge 25 est récupéré par une tuyauterie de pompage 26 reliée à une pompe 27 assurant la réinjection du bitume dans un réservoir de recueil par l'intermédiaire d'une tuyaute­rie de sortie 28.The liquid bitumen poured into the trough 25 is recovered by a pumping pipe 26 connected to a pump 27 ensuring the reinjection of the bitumen into a collection tank via an outlet pipe 28.

Les jets plats 22 étant de forme triangulaire, l'étalement de ces jets au niveau supérieur de la chaus­sée peut produire des surépaisseurs de la couche de liant dans certaines dispositions relatives des demi-­rampes 18a et 18b où il se produit un certain chevauche­ment des deux jets 22 provenant de la buse située à l'extrémité de la demi-rampe 18b située vers la partie centrale de la table de finissage et de la première buse 21 de la rampe 18a dont le jet n'est pas intercepté par l'auge 25.The flat jets 22 being of triangular shape, the spreading of these jets at the upper level of the roadway can produce extra thicknesses of the binder layer in certain relative arrangements of the half-ramps 18a and 18b where there is a certain overlap of the two jets 22 coming from the nozzle located at the end of the half-ramp 18b located towards the central part of the finishing table and from the first nozzle 21 of the ramp 18a whose jet is not intercepted by the trough 25 .

Il n'est pas possible d'éviter de tels recou­vrements grâce à un dispositif d'interception placé au voisinage du niveau supérieur de la chaussée, à cause de la garde au sol réduite du dispositif.It is not possible to avoid such overlaps thanks to an interception device placed in the vicinity of the upper level of the road, because of the reduced ground clearance of the device.

Pour éviter de tels recouvrements, on utilise une auge secondaire 30 montée coulissante dans la direc­tion longitudinale de l'auge 25 et dont les déplacements en fonction des déplacements de l'auge 25 et de la demi-­rampe 18b sont réglés de manière mécanique ou électroni­ que de façon à intercepter partiellement le premier jet 22a déversé pàr la rampe 18a pour éviter un recouvrement avec le dernier jet 22b déversé par la rampe 18b.To avoid such overlaps, a secondary trough 30 is slidably mounted in the longitudinal direction of the trough 25 and whose displacements as a function of the displacements of the trough 25 and of the half-ramp 18b are adjusted mechanically or electronically. that so as to partially intercept the first jet 22a spilled by the ramp 18a to avoid overlapping with the last jet 22b discharged by the ramp 18b.

L'auge secondaire 30 s'écoule à l'intérieur de l'auge principale 25 qui effectue la récupération du bitume intercepté sur le jet 22a.The secondary trough 30 flows inside the main trough 25 which recovers the bitumen intercepted on the jet 22a.

Dans le cas d'un finisseur utilisé pour dépo­ser une couche d'enrobés chauds sur une couche d'émul­sion bitumineuse très rapidement après son répandage, la table de compactage et de finissage suivant l'invention peut être fixée à l'arrière du finisseur et des moyens de déversement et d'étalement des enrobés chauds sont fixés sur le finisseur de manière à déverser les enrobés chauds entre les rampes 18a, 18b et le finisseur. De cette manière, les enrobés chauds entrent en contact avec l'émulsion bitumineuse avant sa rupture sur le sol de la chaussée.In the case of a paver used to deposit a layer of hot mixes on a layer of bituminous emulsion very quickly after spreading, the compacting and finishing table according to the invention can be fixed to the rear of the paver and means for pouring and spreading the hot mixes are fixed on the paver so as to pour the hot mixes between the ramps 18a, 18b and the paver. In this way, the hot mixes come into contact with the bituminous emulsion before it breaks on the pavement floor.

Dans le cas d'un dispositif de pose d'un enduit superficiel selon la technique nouvelle mention­née ci-dessus, des granulats pralinés élaborés à froid ou à chaud pourront être déversés et étalés entre les rampes 18a, 18b et les éléments de compactage et de lissage de la table selon l'invention. Dans ce cas, les opérations de répandage du liant, de répandage des granulats pralinés et de compactage et lissage de l'en­duit pourront être réalisées en un temps très court et parfaitement déterminé par la position des rampes par rapport aux éléments de lissage de la table de finissage et par la vitesse d'avancement de la table correspondant à la vitesse d'avancement de la machine sur laquelle est fixée cette table.In the case of a device for applying a surface coating according to the new technique mentioned above, praline aggregates prepared cold or hot may be poured and spread between the ramps 18a, 18b and the compaction and smoothing the table according to the invention. In this case, the operations of spreading the binder, spreading the praline aggregates and compacting and smoothing the coating can be carried out in a very short time and perfectly determined by the position of the ramps relative to the smoothing elements of the table. finishing and by the speed of advancement of the table corresponding to the speed of advancement of the machine on which this table is fixed.

Les principaux avantages de la table de com­pactage et de finissage suivant l'invention sont donc d'assurer un réglage automatique de la largeur de répan­ dage d'un liant bitumineux, en fonction de la largeur de travail d'une table de finissage.The main advantages of the compacting and finishing table according to the invention are therefore to ensure an automatic adjustment of the spreading width. dage of a bituminous binder, depending on the working width of a finishing table.

La pression dans les éléments de rampe du dispositif suivant l'invention reste constante pour un débit donné, dans la mesure où aucun des jets de bitume ne se trouve coupé pendant le réglage de la rampe. Pour la même raison, la répartition du liant sur la chaussée ne comporte pas d'irrégularités.The pressure in the ramp elements of the device according to the invention remains constant for a given flow rate, insofar as none of the bitumen jets is cut off during the adjustment of the ramp. For the same reason, there are no irregularities in the distribution of the binder on the road.

Enfin, il n'est pas nécessaire, lorsqu'on utilise le dispositif suivant l'invention, d'ajuster le débit de la pompe doseuse de liant bitumineux en faisant varier sa vitesse pour conserver le dosage lorsque la largeur de répandage varie ; en effet, l'ensemble des jets des éléments de rampe sont constamment en service.Finally, it is not necessary, when using the device according to the invention, to adjust the flow rate of the bituminous binder metering pump by varying its speed to maintain the dosage when the spreading width varies; indeed, all the jets of the ramp elements are constantly in service.

La table de finissage et de compactage suivant l'invention comportant une rampe réglable de répandage de liant bitumineux peut être associée aussi bien à un finisseur de type classique qu'à des machines d'un type quelconque permettant la réalisation d'un revêtement ou d'un enduit superficiel sur une chaussée.The finishing and compacting table according to the invention comprising an adjustable bituminous binder spreading ramp can be associated both with a conventional type finisher and with machines of any type allowing the production of a coating or '' a surface coating on a roadway.

Claims (7)

1.- Table de compactage et de finissage d'un revêtement sur un chantier routier, à largeur de travail réglable, comportant au moins une partie centrale (11) et deux parties latérales (12a, 12b) montées mobiles dans la direction transversale de la table perpendicu­laire à sa direction d'avancement (20) sur le chantier, dans un sens et dans l'autre par rapport à la partie centrale (11) et munies de moyens de mise en vibration assurant le compactage et de moyens de chauffage, carac­térisée par le fait qu'elle comporte deux rampes de répandage (18a, 18b) alimentées en liant bitumineux liquide fixées chacune sur une partie latérale mobile (12a, 12b) de la table et avec un certain espacement longitudinal, ces rampes (18a, 18b) munies de buses d'injection (21) réparties suivant leur longueur dans la direction transversale constituant un ensemble de répan­dage réglable en largeur, en fonction du réglage de la table, sur toute la largeur de travail de la table.1.- Compacting and finishing table for a coating on a road construction site, with adjustable working width, comprising at least one central part (11) and two lateral parts (12a, 12b) mounted movable in the transverse direction of the table perpendicular to its direction of advance (20) on the construction site, in one direction and in the other with respect to the central part (11) and provided with vibrating means ensuring the compaction and heating means, characterized by the fact that it comprises two spreading ramps (18a, 18b) supplied with liquid bituminous binder each fixed on a movable lateral part (12a, 12b) of the table and with a certain longitudinal spacing, these ramps (18a, 18b) provided with injection nozzles (21) distributed along their length in the transverse direction constituting a spreading assembly adjustable in width, according to the table setting, over the entire working width of the table. 2.- Table suivant la revendication 1, caracté­risée par le fait que l'une des rampes (18a, 18b) porte, sensiblement sur toute sa longueur, une auge de récupé­ration de bitume (25) ouverte vers le haut dans une disposition parallèle aux rampes (18a et 18b) et dispo­sée à l'aplomb et à un niveau inférieur au niveau des buses d'injection (21) de la rampe (18a), de manière que les jets (22) des buses (21) de la rampe (18a) soient interceptés par l'auge (25) dans la zone transversale de recouvrement L des rampes (18a, 18b) de longueur varia­ble, lors de leurs déplacements relatifs, l'auge (25) comportant des moyens (26, 27, 28) de récupération du bitume déversé par les buses (21) de la rampe (18a) dans la zone de recouvrement L.2.- Table according to claim 1, characterized in that one of the ramps (18a, 18b) carries, substantially over its entire length, a bitumen recovery trough (25) open upwards in an arrangement parallel to the ramps (18a and 18b) and arranged vertically and at a level below the level of the injection nozzles (21) of the ramp (18a), so that the jets (22) of the nozzles (21) of the ramp (18a) are intercepted by the trough (25) in the transverse overlapping area L of the ramps (18a, 18b) of variable length, during their relative movements, the trough (25) comprising means (26, 27, 28) for recovering the bitumen spilled by the nozzles (21) of the boom (18a) in the overlap zone L. 3.- Table suivant la revendication 2, carac­térisée par le fait qu'une auge secondaire (30) est montée mobile à l'intérieur de l'auge (25), dans sa direction longitudinale, au voisinage de son extrémité située en vis-à-vis de l'extrémité de la rampe (18b) portant l'auge (25) située vers la partie centrale de la table de finissage, l'auge secondaire (30) étant reliée à des moyens de déplacement par rapport à l'auge (25) permettant de la disposer de manière à intercepter au moins partiellement le jet (22a) déversé par la première buse de la rampe (18a) disposée à l'extérieur de la zone de recouvrement avec la seconde rampe (18b).3.- Table according to claim 2, characterized in that a secondary trough (30) is movable mounted inside the trough (25), in its longitudinal direction, near its end located opposite the end of the ramp (18b) carrying the trough (25) located towards the central part of the finishing table, the secondary trough (30) being connected to displacement means relative to the trough (25) making it possible to arrange it so as to at least partially intercept the jet (22a) poured out by the first nozzle of the ramp (18a) disposed outside the overlap zone with the second ramp (18b). 4.- Table suivant l'une quelconque des reven­dications 2 et 3, caractérisée par le fait que l'auge principale (25) comporte des moyens de chauffage du bitume récupéré à la sortie des buses (21) de la rampe (18a).4.- Table according to any one of claims 2 and 3, characterized in that the main trough (25) comprises means for heating the bitumen recovered at the outlet of the nozzles (21) of the ramp (18a). 5.- Table suivant l'une quelconque des reven­dications 1 à 4, caractérisée par le fait que les rampes (18a, 18b) sont reliées à des ferrures respectivement (14a, 14b) fixées sur les extrémités extérieures des parties latérales (12a, 12b) de la table de finissage.5.- Table according to any one of claims 1 to 4, characterized in that the ramps (18a, 18b) are connected to fittings respectively (14a, 14b) fixed on the outer ends of the lateral parts (12a, 12b ) from the finishing table. 6.- Table suivant l'une quelconque des reven­dications 1 à 5, caractérisée par le fait qu'elle com­porte de plus un dispositif de déversement et d'étale­ment d'enrobés bitumineux d'un finisseur de revêtement routier sur lequel la table est fixée, ce dispositif de déversement et d'étalement étant placé entre les rampes de répandage de liant (18a, 18b) et la table de finis­sage proprement dite (11, 12a, 12b).6.- Table according to any one of claims 1 to 5, characterized in that it further comprises a device for pouring and spreading bituminous mixes of a road surface finisher on which the table is fixed , this pouring and spreading device being placed between the binder spreading ramps (18a, 18b) and the actual finishing table (11, 12a, 12b). 7.- Table suivant l'une quelconque des reven­dications 1 à 5, caractérisée par le fait qu'elle com­porte un dispositif de déversement et d'étalement de granulats revêtus de bitume disposé entre les rampes de répandage de liant (18a, 18b) et la table de finissage proprement dite (11, 12a, 12b), la table de finissage étant fixée sur un dispositif de réalisation d'un enduit superficiel à partir de granulats enrobés.7.- Table according to any one of claims 1 to 5, characterized in that it comprises a device for discharging and spreading aggregates coated with bitumen disposed between the binder spreading ramps (18a, 18b) and the actual finishing table (11, 12a, 12b), the finishing table being fixed on a device for producing a surface coating from coated aggregates.
EP90402164A 1989-09-15 1990-07-26 Extensible screed for compacting and finishing roadcovering with liquid binder spreading means Expired - Lifetime EP0418105B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90402164T ATE90751T1 (en) 1989-09-15 1990-07-26 EXTENDABLE SCREED FOR COMPACTING AND FINISHING ROAD SURFACE LAYERS WITH SPRAYING DEVICE FOR LIQUID BINDER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912132A FR2652098B1 (en) 1989-09-15 1989-09-15 COMPACTION AND FINISHING TABLE FOR A ROAD COVER WITH ADJUSTABLE WORKING WIDTH INCLUDING MEANS FOR SPREADING LIQUID BINDER.
FR8912132 1989-09-15

Publications (2)

Publication Number Publication Date
EP0418105A1 true EP0418105A1 (en) 1991-03-20
EP0418105B1 EP0418105B1 (en) 1993-06-16

Family

ID=9385540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402164A Expired - Lifetime EP0418105B1 (en) 1989-09-15 1990-07-26 Extensible screed for compacting and finishing roadcovering with liquid binder spreading means

Country Status (6)

Country Link
EP (1) EP0418105B1 (en)
AT (1) ATE90751T1 (en)
DE (1) DE69001973T2 (en)
DK (1) DK0418105T3 (en)
ES (1) ES2043316T3 (en)
FR (1) FR2652098B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509877A1 (en) * 1991-04-17 1992-10-21 Screg Device for resurfacing a road by successive spreading of an adhesive layer and a hot asphalt layer on the road surface
FR2681885A1 (en) * 1991-10-01 1993-04-02 Colas Sa DEVICE FOR SPREADING AN EMULSION FOR HANGING BUTUMINOUS COATINGS OR THE LIKE, AND PAVEMENT CONSTRUCTION MACHINE COMPRISING SUCH A DEVICE.
EP0560360A2 (en) * 1992-03-13 1993-09-15 Caterpillar Paving Products Inc. Screed assembly for an asphalt paving machine
EP0566752A1 (en) * 1992-03-26 1993-10-27 Joseph Vögele AG Extendable roughening screed
AT412735B (en) * 2003-06-12 2005-06-27 Strassmayr Maschb Ges M B H & DEVICE FOR APPLYING A BINDING AGENT FOR AN ASPHALT BEARING ON A TRAFFIC SURFACE
EP2699732A1 (en) * 2011-04-19 2014-02-26 Volvo Construction Equipment AB Asphalt pavement constructing machine and method of operation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110725186A (en) * 2019-11-21 2020-01-24 中海外交通建设有限公司 Road construction trimming device tamped after loosening soil

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Publication number Priority date Publication date Assignee Title
US3559543A (en) * 1969-02-27 1971-02-02 Richard Schwoebel Jr Apparatus for applying a fluid substance to a surface
DE3534295A1 (en) * 1985-09-26 1987-04-02 Pietsch Max Kg Gmbh & Co Device for distributing mixes on traffic surfaces
US4702642A (en) * 1986-07-25 1987-10-27 Cedarapids, Inc. Extensible screed assembly for a bituminous paver
FR2611766A1 (en) * 1987-02-24 1988-09-09 Screg Routes & Travaux BITUMINOUS EMULSION SPREADING DEVICE ON THE SURFACE OF A ROAD WITHOUT TRUCK TRAFFIC ON THE HANGING LAYER MADE BY EMULSION SPREADING
EP0325533A1 (en) * 1988-01-19 1989-07-26 A C M A R Société à Responsabilité Limitée Spray bars for bitumen

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GB1570839A (en) * 1977-11-11 1980-07-09 Hoes K G Devices for adjusting the working width of road making machines

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
US3559543A (en) * 1969-02-27 1971-02-02 Richard Schwoebel Jr Apparatus for applying a fluid substance to a surface
DE3534295A1 (en) * 1985-09-26 1987-04-02 Pietsch Max Kg Gmbh & Co Device for distributing mixes on traffic surfaces
US4702642A (en) * 1986-07-25 1987-10-27 Cedarapids, Inc. Extensible screed assembly for a bituminous paver
FR2611766A1 (en) * 1987-02-24 1988-09-09 Screg Routes & Travaux BITUMINOUS EMULSION SPREADING DEVICE ON THE SURFACE OF A ROAD WITHOUT TRUCK TRAFFIC ON THE HANGING LAYER MADE BY EMULSION SPREADING
EP0325533A1 (en) * 1988-01-19 1989-07-26 A C M A R Société à Responsabilité Limitée Spray bars for bitumen

Non-Patent Citations (1)

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Title
THE CONSULTING ENGINEER, vol. 35, no. 4, mai 1971, page 73; "Aid to read maintenance" *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509877A1 (en) * 1991-04-17 1992-10-21 Screg Device for resurfacing a road by successive spreading of an adhesive layer and a hot asphalt layer on the road surface
FR2675522A1 (en) * 1991-04-17 1992-10-23 Screg Routes & Travaux DEVICE FOR PRODUCING A ROAD COVERING BY SUCCESSIVE SPREADING ONTO THE ROAD SURFACE TO BE COVERED, A HANGING LAYER AND A LAYER OF HOT BITUMINOUS MATERIAL.
FR2681885A1 (en) * 1991-10-01 1993-04-02 Colas Sa DEVICE FOR SPREADING AN EMULSION FOR HANGING BUTUMINOUS COATINGS OR THE LIKE, AND PAVEMENT CONSTRUCTION MACHINE COMPRISING SUCH A DEVICE.
EP0536052A1 (en) * 1991-10-01 1993-04-07 Colas S.A. Device for distributing a bonding emulsion for bituminous coated materials or similar fluids, and road making machine comprising such a device
US5354148A (en) * 1991-10-01 1994-10-11 Colas Apparatus for spreading a bonding emulsion, or similar fluids, and road-building machine
EP0560360A2 (en) * 1992-03-13 1993-09-15 Caterpillar Paving Products Inc. Screed assembly for an asphalt paving machine
EP0560360A3 (en) * 1992-03-13 1994-01-05 Caterpillar Paving Prod
EP0566752A1 (en) * 1992-03-26 1993-10-27 Joseph Vögele AG Extendable roughening screed
AT412735B (en) * 2003-06-12 2005-06-27 Strassmayr Maschb Ges M B H & DEVICE FOR APPLYING A BINDING AGENT FOR AN ASPHALT BEARING ON A TRAFFIC SURFACE
EP2699732A1 (en) * 2011-04-19 2014-02-26 Volvo Construction Equipment AB Asphalt pavement constructing machine and method of operation
EP2699732A4 (en) * 2011-04-19 2015-03-25 Volvo Constr Equip Ab Asphalt pavement constructing machine and method of operation

Also Published As

Publication number Publication date
ES2043316T3 (en) 1993-12-16
DK0418105T3 (en) 1993-11-15
DE69001973T2 (en) 1993-10-28
FR2652098A1 (en) 1991-03-22
FR2652098B1 (en) 1991-12-13
ATE90751T1 (en) 1993-07-15
DE69001973D1 (en) 1993-07-22
EP0418105B1 (en) 1993-06-16

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