EP1925736A1 - Method for producing a sprayed layer and paving machine with spraying system - Google Patents

Abstract

The method involves producing a sprayed carpet during vehicle traveling motion. The sprayed carpet has front and rear boundaries, which are respectively parallel to a straight stationary reference line extending on a planum laterally to the traveling motion direction. A spraying facility which is in front of the traveling motion direction forms the boundaries by activating or deactivating each of the spraying facilities depending on the traveling motion at a predetermined distance from or when reaching the respective reference line. An independent claim is also included for a road finisher comprising a bonding agent spraying system.

Description

The invention relates to a method according to the preamble of patent claim 1 and to a road paver according to the preamble of patent claim 11.

The out EP 0 484 236 A Known paver has distributed over the length of the paver on several trained as ramps spraying, which are offset even across the longitudinal axis of the paver against each other, for example, to form three strip-shaped Sprühgassen that result behind the paver cross-linked spray carpet. A first spraying ramp is placed in front of the chassis and sprays the ground between the lanes of the landing gear. Second sprayers are located behind the landing gear in the rear paver area which spray the lanes. Third spraying devices are provided outside the lanes, longitudinally between the front and rear sprayers, to spray the areas outside the landing gear up to the full working width. The spray carpet, since the sprayers are moved back and forth, and the spray nozzles are deactivated upon reversal of motion, composed of individual, rectangular or parallelogram spray fields mosaic. Since all spraying devices are activated simultaneously from the start of spraying and simultaneously deactivated at the spraying end, a spraying carpet results from the displacement of the spraying devices in the direction of travel and transversely thereto, the rear and front boundaries of which do not run in a straight line and transverse to the direction of travel, but instead have a stair profile. However, since the installation start or the installation end of the built-in ceiling layer are exact and straight across the direction of travel movement, and it must be ensured that the spray carpet extends over the full working width to the installation start and end of installation, remain due to the stair profile of the rear and front boundaries of the Spray carpet left over from the ceiling layer unused sections of the stair profile. This not only means a waste of the adhesive, but also a not necessary preimpregnation of the subgrade, which is multiplied by the fact that in a new installation start and connecting a new ceiling layer to an already installed earlier, in turn adhesive is applied in excess according to the stair profile Of course, the newly installed ceiling layer again requires fresh adhesive over the working width in order to achieve a homogeneous bond. To this Disadvantage to eliminate, in practice, the respective stair profile is usually supplemented with spray lances by hand. However, this usually results in a locally too rich application of the adhesive, which then acts for the ceiling layer rather as a release layer (adhesion damage), and an undesirable environmental impact with bitumen odor and spray.

The out DE 41 01 417 A Known road paver is designed so that the spray system is also optionally degradable. Below the landing gear, the spraying system comprises spraying ramps, which not only spray the basic width of the screed but also have extension beams which can be extended or swung out laterally. The mounting and handling of the extension beams spraying the outer areas of the working width can lead to problems. In addition, it is difficult to accommodate the sprayers in this area between the rear of the paver and the transverse spreading device for the screed.

The invention has for its object to provide a method of the type mentioned above and designed for performing the process road paver, which make it possible despite the dislocations between the spraying without tedious manual labor, waste of adhesive or contamination of the subgrade a substantially ideal rectangular spray carpet with continuous to create straightforward front and rear boundaries.

The stated object is achieved with the features of claim 1 and with the paver according to claim 11.

Since, according to the method, each spraying device is only activated to move when it has reached or reaches a certain distance from the previously set reference line, the rear boundary of the sprayed carpet becomes straight and parallel to the reference line, as does the front boundary of the sprayed carpet. Thus, the front and rear boundaries close to the installation start and installation end of the ceiling layer exactly, without wasting adhesive or unnecessarily polluting the planum. Of course, in practice, some overlap is introduced, ie, the front and rear boundaries of the sprayed carpet come to lie very slightly in front of the installation beginning or behind the installation end in order to avoid with certainty that areas of the ceiling layer do not receive the desired binding. Even the most improperly dosing and polluting handwork is eliminated. The paver is with its control device, either the controller of the paver itself or a preferably communicating therewith control device for the spray system, which is designed so that it activates the spray devices sequentially or deactivated when the respective spray reaches the predetermined distance to the reference line or the reference line. This reference line is, preferably, also taken into account when installing the ceiling layer for the installation beginning and the installation end. This means that, in practice, two reference lines are set up, namely when an installation and spraying cycle starts and at the end of a fitting and spraying cycle.

In an expedient variant of the method, a spraying device oriented at 90 ° to the direction of travel movement is activated or deactivated with a plurality of spray nozzles spaced apart in the longitudinal direction of the spraying device so that all spraying nozzles start or end spraying operations at the same time. In this way, this spraying device generates a part of the front or rear boundary of the sprayed carpet, which part is rectilinear and transverse to the driving direction of movement.

In another expedient variant of the method, each spraying device which can be aligned with the direction of travel at a different angle than 90 ° is activated or deactivated with at least one spray nozzle, preferably a plurality of spray nozzles spaced longitudinally of the spraying device, such that each spray nozzle is separated by the predetermined distance from or Upon reaching the reference line, a spraying process begins or ends. In this way, in spite of the 90 ° different orientation angle of this sprayer again a part of the front or rear boundary of the sprayed carpet is generated, which is straight and transverse to the direction of travel movement, regardless of the angle.

When activating or deactivating each spraying device oriented at 90 ° to the direction of travel movement, it is expedient to measure the path up to the reference line in order to be able to precisely control the time of activation or deactivation.

On the other hand, to activate or deactivate each spraying device orientable at an angle other than 90 ° to the traveling direction, measurement of the path up to the reference line for each spray nozzle or measurement of the alignment angle of the spray device and position detection of each spray nozzle with respect to the reference line to disable or enable at the right time. This can be carried out, expedient, automatically via the control device, so that the operator does not need to worry about control operations, or even, so to speak, manually by an operator. In this case, of course, preferably, also proceeded depending on the set over the orientation angle of the sprayer working width, because this determines the orientation angle. Appropriately, the dosage is varied so that with smaller working width and thus small orientation angle, the amount of each spray nozzle is withdrawn, as overlap at a smaller angle, the spray nozzles in the direction of travel more than at larger orientation angle.

The method is expediently carried out such that first the reference line is placed virtually but stationary on the planum. Then, in the spray control device, preferably via a screen, the respective set value for the vehicle speed, the working width, the spray quantity per unit area, and the like are input, and the spraying operation of the spray system is switched to standby. Only then the vehicle is set in motion. Once the travel has started, the spray closest to the reference line at the predetermined distance or reaching the reference line is activated automatically or by the operator. At the end of the production of the sprayed carpet, the procedure is reversed in that initially the reference line is again placed virtually, and the sprayers are again deactivated sequentially with reference to the reference line.

In this case, it is expedient if the adhesive is heated in a controlled manner before starting the vehicle and circulated in the spray devices, wherein a release signal dependent on a setting check of the setpoint values is awaited. The release signal is issued only when all settings have been checked by the controller and found to be good. Then the vehicle is started and also the spraying process is initiated in the mentioned manner.

After a spraying end, preferably after the sequential deactivation of the spraying devices, either automatically or operator-guided, a compressed-air cleaning and emptying cycle of at least the spraying devices is carried out. In this way it is prevented that the spraying devices are added during a longer installation break.

It is also useful to permanently or removably integrate the spray system in a vehicle forming, at least one screed having road paver, with which by the driving movement from a largely linear installation start to a far-reaching line-shaped installation end, which are straight and transverse to the direction of travel, continuously built a ceiling layer, the installation start or the installation end are used as the same reference line L for activating and deactivating the sprayers. Preferably, however, the rear or front boundaries of the sprayed carpet are made a predetermined distance before the installation start or behind the installation end. Also in the transverse direction, it is expedient to make the spray carpet slightly wider than the built-in ceiling layer.

In a particularly comfortable way, the respective reference line is virtually placed on a route-representing screen of the control device, and is then monitored after recording the driving movement approach of the sprayers to the reference line to the activation or deactivation. This can be done automatically by the computer or even by an operator.

An expedient embodiment of a paver is characterized in that in the spray system, a first spraying at 90 ° to the paver longitudinal axis in the front area for spraying the gap between the lanes of a chassis, two more spraying at 90 ° to the paver longitudinal axis in the rear area behind the lanes for spraying the first released lanes, and two are provided outside the lanes between the front and rear area either transversely to the paver longitudinal axis or pivotable relative to the paver longitudinal axis sprayer, each spraying device having multiple, distributed in the longitudinal direction of this spraying spray nozzles, individually, sequentially, in groups or in common and optionally clocked to operate. This distribution of spraying has the advantage of being able to use easily accessible areas on the paver for the spraying, ie to have to accommodate only very small spraying in the cramped work area between the rear of the chassis and the transverse distribution of the screed, but still from the totality of sprayers to be able to produce an arbitrarily wide spray carpet, and, advantageously, despite the proposed dislocations between the sprayers achieve rectilinear and transverse to the direction of travel movement rear and front boundaries of the sprayed carpet.

In the case of swiveling spray devices, these angle sensors are appropriately assigned to the control device in order to be able to regulate the pivoting adjustment cleanly, and on the other hand vary the dosage dependent on the angle and be able to determine the position of each spray nozzle with respect to a reference line exactly.

Furthermore, a distance measuring device connected to the control device is expedient, which is used for activating and deactivating the spraying devices.

Finally, a driving speed setting and detection device connected to or incorporated in the control device should also be provided, since, of course, the activation and deactivation of the spraying devices is dependent on driving speed, and the dosage should also take into account the driving speed.

Reference to the drawings, embodiments of the subject invention will be explained.

Fig. 1

eine schematische Seitenansicht eines Straßenfertigers mit anmontierten Sprühmodulen für den Einbau einer bituminösen Decke mit Hilfe eines durchgehenden Haftschicht-Sprühteppichs aus eines aufgesprühten Bitumenemulsion,

Fig. 2

eine schematische Draufsicht zu Fig. 1,

Fig. 3

eine schematische Draufsicht zu Fig. 1, zur Erläuterung des Verfahrens zur Herstellung des Sprühteppichs, und

Fig. 4

eine Draufsicht auf die auf den Sprühteppich eingebaute Decke.

Show it:

Fig. 1

a schematic side view of a paver with mounted spray modules for the installation of a bituminous ceiling using a continuous adhesive layer sprayed carpet of a sprayed bitumen emulsion,

Fig. 2

a schematic plan view to Fig. 1 .

Fig. 3

a schematic plan view to Fig. 1 to illustrate the process for preparing the sprayed carpet, and

Fig. 4

a plan view of the built-in spray mat ceiling.

A paver F, namely a standard paver, for example, for smaller working widths, has a chassis 1, to the bottom of a chassis 2 (either a crawler chassis as shown, or as not shown a wheel gear) is mounted. At the front end of the chassis 1 a Gutbunker is provided, from which a bottom conveyor 8 (for example, a scraper belt or two adjacent scraper belts) leads to the rear end of the chassis 1. On the chassis a primary drive source M with an electronic control device C at an operating platform 4 is provided. Behind the rear end of the chassis 1, a transverse distribution device 5 is mounted, for example a distribution screw, behind which a screed 6 is arranged, which is articulated with Holmen 7 on the chassis 1 and towed.

It should be noted that the screed 6 as a so-called Ausziehbohle (as in Fig. 2 shown) has a base screed part and Ausziehbohlenteile 6a, so that the working width B is variable.

The paver F is complemented by a removably mounted spray S, if an adhesive layer of a bitumen emulsion is applied to the subgrade. If the paver F is used for installation work in which no adhesive layer is required, then the spray device S is either inoperative or will be partially or completely dismantled.

The spraying device S comprises a first spraying module M1 on the operating platform 4, e.g. offset from the center of the control platform 4 to the side. The first spray module M1 contains components and the like. for storing, heating, filtering, circulating and discharging the bitumen emulsion and for a compressed-air cleaning cycle and is designed, for example, as block 13. In the first spray module M1, a spray control CU, e.g. an electric spraying device may be provided. Alternatively, the spray control CU could also be mounted elsewhere in the paver F or integrated into the control device C. The first spray module M1 is connected via connecting lines, not shown, with the drive supply of the paver F, to obtain hydraulic and / or mechanical and / or electrical and / or electronic drive power from the paver itself. In one embodiment, not shown, the first spray module M1, however, could be designed to be self-sufficient with its own drive supply.

A second spray module M2 is attached to the chassis below the Gutbunkers 3, more precisely in the region of the front end of the conveyor device 8 with fasteners 10. The fasteners 10 may optionally be prepared on the paver M. The second spray module M has as spraying a transverse Sprühampe 11 with spray nozzles 12 and is connected via a laid inside or outside the paver line 9 with the first spray module M1. The spray ramp 11 only applies the bitumen emulsion to the surface within the lane width, so that the chassis 2 does not travel in the bitumen emulsion.

The third spray module M3 is mounted behind the chassis 2 below the chassis 1 and has as spray two spraying ramps 11 'with spray nozzles 12, which spray only the lanes of the chassis 2, so that extends in the region of the transverse distribution device 5, an adhesive layer on the planum covers the working width B of the road paver interruption-free, or extends on both sides even slightly beyond.

Because of the extendable screed 6, 6a with the variable working width B, a fourth spray module M4 can be mounted which is arranged within the length of the chassis 1 between the second and third spray modules M1, M2, structurally separate therefrom, and with spraying ramps 14 as further spraying means the outside of the chassis 2 is fitted, which are mounted either on the chassis 2 or on the chassis. The fourth spray module M4 points per side according to Fig. 2 a spray ramp 14 which is pivotally adjustable about a substantially vertical axis 15 between a largely folded to the outside position and a deployed position by an actuator 16. The fourth spray module M4 applies the bitumen emulsion to the remaining part of the working width B, ie to areas B3 and B3 'lying outside the landing gear 2.

The spray nozzles 12 at least in the spray ramps 14 are conveniently provided with shutters or valves 17, e.g. operated clocked. The spray nozzles 12 can be clocked simultaneously or cascade-like. The valves or closure elements 17 could also be arranged in the lines 9, or even in the first spray module M1. Optionally, the spray ramps 11, 11 ', 14 are only carriers of the spray nozzles 12, which are fed individually or in groups.

The spray control CU is designed so that, depending on the folding position of each spray ramp 14 is individually metered, ie, that the strongest dose is applied when the spray ramp 14 is farthest outward, and vice versa. Incidentally, the metering is carried out in dependence on the driving speed of the paver in Einbaufahrt to produce a uniform cohesive and thin as possible adhesive layer. This type of metering is expedient because the spray nozzles 12 overlap transversely to the working direction more strongly, the farther the spray ramp 14 is folded to the outside of the chassis 2, and then aufbrächten more adhesive per unit area than the other spray ramps 11, 11 '. For this purpose, also connected to the controller angle sensors 18 are installed.

In a modified, in Fig. 2 Dashed lines indicated embodiment instead of a spray ramp 14 per side in the fourth spray module M4 as sprayers per two spray ramps 14 'per page provided, which are unfolded and collapsed in the manner of a scissors mechanism. The substantially vertical axes X of the spraying ramps 14 are mounted as close as possible to the chassis 1. Since the spray nozzles 12 are arranged on the spraying ramps 14 of the fourth spray module with fixed intervals in the longitudinal direction of the spray ramps, and their distance to each other transversely to the direction of travel changes depending on the folding position, compensates the spray control CU in the dosage a consequent change in the output amount per Area unit depending on the folding angle.

The clocking of the spray nozzles 12, for example by valves, is carried out so that each spray nozzle is either fully open or fully closed, wherein the time ratio of closing time to opening time for influencing the application rate per unit area can be changed. Alternatively, even the degree of opening could be varied. Thanks to this refined spray control, the sprayed carpet can be produced very uniformly and precisely with the correct, just sufficient dosage per unit area. This considerably increases the acceptance of the spray paver even among the building authorities, who have so far rejected the use of adhesives on account of their environmental impact and, above all, of the local loss of liability of the ceiling layer due to overdosing or underdosing.

In the Fig. 2 sprayers 14 shown (spray bars or spraying ramps with nozzles 12, or nozzle carriers with supply lines to the nozzles) could in an alternative embodiment be arranged transversely to the direction of travel R and be reciprocable.

Fig. 3 illustrated as a schematic plan view of the vehicle, such as the paver of Fig. 1 and 2 How to control the spraying system either manually or automatically to get an in Fig. 4 for example, produce a relatively straight rectangular spray carpet T for a straight track. Fig. 4 illustrates a completed construction section, in which on a prepared by the spray system S spray carpet T a ceiling covering D has been installed. The sprayed carpet T has in this example straight track as well as the top layer D exact rectangular shape, which, preferably and not absolutely necessary, the sprayed carpet T over the outline of the ceiling layer D has an excess Y, so that the edge regions of the top layer D adhere properly. The sprayed carpet T has a front boundary V, which transverses the direction of travel R and straight over the working width B, and a rear boundary H, which also passes straight across the working width and transverse to the direction of travel. Similarly, the ceiling layer D has a mounting beginning A, the straight across the working width B and transversely to the direction of travel R passes, as well as a similar installation end E.

In order to be able to produce the sprayed carpet T in this form and in spite of the spraying devices 11, 11 ', 14, 14' displaced in the direction of travel R and transversely thereto, the method according to the invention is carried out either automatically or operator-guided. This is based on Fig. 3 explained.

Before the paver forming the vehicle with the spraying system is started, a spraying device 11 is placed on the surface in front of the foremost driving direction (possibly directly below the same) a reference line L running exactly transversely to the direction of travel movement. This is done, for example, on a screen in the control device C, CU. Previously, set values for, for example, the traveling speed at installation, the working width B, and the spraying amount per unit area, and the like have been input to the control device. If the adhesive, e.g. a bitumen emulsion, should not be heated, then the heating takes place, expediently with a control of the processing temperature. Subsequently, a circulation of the adhesive is switched on in the spray system and also the activation release of the spraying operation takes place. Then, for example, by the control device, a review of all previous settings, such as the temperature, the pressure, the circulation of the adhesive, the amount of dose, and the set travel speed, the positive result of this review is a release signal, which is displayed to the operator , Thereafter, the vehicle F is started or, if already started, set in motion. Then, the spraying operation is started, but still no spraying operations are performed.

Only when the spray device 11, which is at the forefront in the direction of travel, reaches a predetermined distance from the reference line L, or the reference line L, do the spraying operations begin from the nozzles of the sprayer 11. The other sprayers 11 ', 14, 14' are still disabled while the vehicle continues to run.

Depending on the driving speed, e.g. is carried out by a gear pulse count on the hydraulic motor of the traction drive, or via another displacement measuring system or GPS-based, and also depending on the set working width B, the position of each spray nozzle 12 of the sprayers 14, also taking advantage of the information of the angle sensors, when reaching the reference line L or the predetermined distance before or behind detected and the individual spray nozzles 12 are each activated so that each spraying process begins exactly at the reference line L. The sprayers 11 'are still disabled. If, then, when proceeding, sprayers 11 'have finally reached the predetermined distance to or from reference line L, which is monitored, for example, by a displacement measuring system, sprayers 11' are also activated, so that they determine exactly at the reference line with the spraying processes.

In this way, a spray width corresponding to the working width B is laid. The start of work of the screed 6, 6a is relocated to the reference line L, namely expedient so that the installation start A, as in Fig. 4 shown shortly before the front boundary V of the sprayed carpet comes to rest.

If the route is processed and an operation stop or abort is scheduled, then the sprayers 11, 11 ', 14, 14' are deactivated in the reverse order, with the reverse sequence to form the rear boundary H. Finally, the installation in the ceiling layer D stops where the installation end E comes to rest slightly in the working travel direction of movement within the rear boundary H of the sprayed carpet T.

The method can automatically via the control device, z. B. computer-controlled, or by the operator who monitors the processes visually, for example on the screen, and in parallel in nature, and then manually enters the appropriate commands to the respective correct times.

After the end of work all sprayers are expediently blown out and cleaned by a manually initiated or automatic compressed air cleaning cycle as part of a program routine.

Claims (15)

Method for producing a continuous adhesive sprayed carpet (T), in particular from a bitumen emulsion, comprising a vehicle having a spray system (S) with at least two spray devices (11, 11 ', 14, 14') and a spray control device (CU, C) ( F) on a flat surface, wherein the spraying devices in and transverse to the direction of travel (R) are offset from each other and each have at least one spray nozzle (12) and a controllable member (17) at least for activating and deactivating a spraying process, characterized in that during a Driving movement of the sprayed carpet (T) with rear and front boundaries (V, H) passing through the spray carpet width parallel to one respective reference line (L) placed in front of the foremost spraying device (R) in the direction of travel (R) transverse to the direction of travel (R). is made by each spray (11, 11 ', 14, 14') only driving motion dependent in a vorbest distance from or when reaching the respective reference line (L) is activated or deactivated. Method according to Claim 1, characterized in that a spray device (11, 11 ') oriented at 90 ° to the direction of travel (R) is activated or deactivated with a plurality of spray nozzles (12) spaced apart in the longitudinal direction of the spray device such that all spray nozzles (12) Start or stop spraying at the same time. Method according to claim 1, characterized in that a spraying device (14, 14 ') which can be oriented relative to the travel direction (R) at an angle (α) different from 90 ° is provided with at least one spray nozzle, preferably a plurality of spray nozzles (12) spaced apart in the longitudinal direction of the spraying device, is activated or deactivated so that each spray nozzle for itself at the predetermined distance from or when reaching the reference line (L) starts or stops a spraying process. A method according to claim 1, characterized in that the activation or deactivation of each under a 90 ° to the direction of travel (R) aligned spray (11, 11 ') via a measurement of the path to the reference line (L) is made. Method according to claim 1, characterized in that the activation or deactivation of each spraying device (14, 14 ') which can be oriented at a different angle (α) than 90 ° to the direction of travel movement (R) is determined by measuring the path to the reference line and a measurement of the orientation angle (α) of the spraying device or a position determination of each spray nozzle itself with respect to the reference line (L) is carried out automatically or operator-controlled, preferably depending on the working width (B) set via the alignment angle (α) of the spraying device. Method according to at least one of the preceding claims, characterized in that first the reference line (L) is placed virtually,
in the spray control device (CU, C), preferably via a screen, set values such as the travel speed, the working width, the spraying amount per unit area, and the like, are entered and the spraying operation is switched to standby,
that the vehicle (F) is set in motion,
and that each of the reference line (L) closest to the predetermined distance or the reference line reaching spray (11, 11 ', 14, 14') is activated automatically or by the operator. A method according to claim 6, characterized in that prior to starting the vehicle (F), the adhesive is heated in a controlled manner and circulated in the spray and wait for a dependent of a setting verification release signal. Method according to at least one of the preceding claims, characterized in that after the sequential deactivation of the spraying devices (11, 11 ', 14, 14') a compressed air cleaning and emptying cycle of at least the spraying devices is carried out. Method according to at least one of the preceding claims, wherein the spray system (S) is permanently or detachably integrated in a road paver comprising the vehicle, at least one screed (6, 6a, 6b), with which, during a travel movement starting from a largely linear installation start (A) up to a largely line-shaped installation end (E) transversely to the direction of travel movement (R), continuously a ceiling layer (D) is installed, characterized in that the installation start (A) or the installation end (E) as the respective reference line (L) for Activating or deactivating the spray devices (11, 11 ', 14, 14') are used, and that, preferably, the rear or front boundaries (H, V) of the sprayed carpet (T) by a predetermined distance (Y) before the installation start (A) or behind the installation end (E) are produced. A method according to claim 9, characterized in that the respective reference line (L) is placed virtually on a route representing screen of the control device (C, CU), and that after recording the driving movement, the approach of the spray means (11, 11 ', 14, 14 ') to the reference line is monitored until activation or deactivation, preferably automatically under computer control or by an operator. Paver with a spraying system (S), in particular for a bitumen emulsion, and a controller (C, CU) for the road paver (H, V) and the spraying system, the spraying system for producing a continuous spraying mat (T) on a surface with at least two Spraying devices (11, 11 ', 14, 14') is provided, which are offset in and transverse to the direction of travel (R) against each other and each have at least one spray nozzle (12) and a controllable member (17) at least for activating and deactivating a spraying operation , characterized in that the control device (C, CU) is designed such that the sprayed carpet (T) with rear and front boundaries (H, V) passing through the spray carpet width is parallel to one in each direction of travel (R) in front of the foremost spraying device ( 11) transversely to the direction of travel (R) on the planum placed reference line (L) is made, and that each spray fah Depending on the movement is only activated or deactivated upon reaching a predetermined distance from or when reaching the respective reference line (L). Road finisher according to claim 11, characterized in that in the spray system, a first spraying device (11) at 90 ° to the paver longitudinal axis in the front area for spraying the gap between the lanes of a chassis (2), two further sprayers (11 ') at 90 ° to the paver longitudinal axis Rear area behind the lanes for spraying the lanes, and two outside the lanes between the front and the rear of either transversely movable to the paver longitudinal axis or relative to the paver longitudinal axis pivotable sprayers (14, 14 ') are provided, and that each spraying device distributed more in the longitudinal direction of the sprayer , individually, sequentially or jointly operable, and if necessary. Tactable spray nozzles (12). Road paver according to claim 12, characterized in that associated with the pivotable spray devices (14, 14 ') to the control device (C, CU) associated angle sensors (18). Paver according to claim 11, characterized in that a device connected to the control device Wegmessvorrichtung (W) is provided. Road paver according to claim 11, characterized in that an attached to the control device or incorporated into this Fahrgeschwindigkeits adjustment and detection device is provided.

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