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EP0971072A1 - Method for making asphalt coverings - Google Patents

Method for making asphalt coverings Download PDF

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Publication number
EP0971072A1
EP0971072A1 EP99890230A EP99890230A EP0971072A1 EP 0971072 A1 EP0971072 A1 EP 0971072A1 EP 99890230 A EP99890230 A EP 99890230A EP 99890230 A EP99890230 A EP 99890230A EP 0971072 A1 EP0971072 A1 EP 0971072A1
Authority
EP
European Patent Office
Prior art keywords
binder
asphalt
bitumen
spray nozzles
mix
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
EP99890230A
Other languages
German (de)
French (fr)
Other versions
EP0971072B1 (en
Inventor
Johann Dipl. Ing. Dr. Bleier
Alexander Bruckbauer
Thomas Dipl. Ing. Schinkinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osterreichische Vialit-Gesellschaft Mbh
Original Assignee
Osterreichische Vialit-Gesellschaft Mbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osterreichische Vialit-Gesellschaft Mbh filed Critical Osterreichische Vialit-Gesellschaft Mbh
Priority to AT99890230T priority Critical patent/ATE239139T1/en
Publication of EP0971072A1 publication Critical patent/EP0971072A1/en
Application granted granted Critical
Publication of EP0971072B1 publication Critical patent/EP0971072B1/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
    • E01C19/48—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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/185—Isolating, separating or connecting intermediate layers, e.g. adhesive layers; Transmission of shearing force in horizontal intermediate planes, e.g. by protrusions

Definitions

  • the invention relates to a method for producing a Asphalt pavement on surfaces such as roads, paths and the like, with a binder pre-injected and immediately afterwards the asphalt surface is applied. So it's about a process for the production of the layer and layer composite in asphalt road construction.
  • the invention further relates to a device for spraying binder before applying an asphalt surface, the device from a binder tank, at least one with it connected supply line and associated spray nozzles exists, as well as a paver with a hot mix container and a binder tank.
  • the invention also relates to a road surface, which was manufactured by the method according to the invention.
  • bitumen emulsion As a binder for the purpose of improving the adhesive network of the Spray layers, the bitumen emulsion a has a high water content. Therefore, it was necessary to Bitumen emulsion a longer period of time before installation to spray the asphalt surface, so that in this period the water could evaporate. In practice it happens easily damage the binder layer, which reduces the adhesion of the asphalt surface.
  • the aim of the present invention was, inter alia, to Pre-spray to use a binder that is water- and is solvent free.
  • the pre-spraying should be done by the Paver immediately before applying the asphalt layer take place without the disadvantages described to bring oneself.
  • Liability between underground and Asphalt pavement should also be used at low ambient temperatures comply with the requirements.
  • the applicant has the so-called flux bitumen as a binder developed according to the Austrian patent application A 1161/94.
  • the bitumen is thereby flux oils, such as. Rapeseed oil, brought into a flowable, processable form, due to the low volatility of the flux oils no significant Evaporation of solvent occurs.
  • flux bitumen is excellently suited to be used as a binder for pre-spraying with a paver before applying asphalt, the amounts to be applied per unit area being significantly less than with conventional bitumen emulsions.
  • Flux bitumen had previously been regarded as completely unsuitable for spraying because a spraying agent should set as hard as possible.
  • flux bitumen was known to be relatively soft for a period of time.
  • this disadvantage does not occur if the flux bitumen layer is very thin, since the flux constituents (flux oils) are removed by diffusion from the mixed material layer applied above and the porous substrate.
  • the application amount according to the invention is preferably less than 0.5 kg / m 2 , particularly preferably between 0.1 and 0.2 kg / m 2 . Higher order quantities can be advantageous in special cases, for example if there is a heavily lean, cracked or milled surface.
  • Bituminous binders and also flux bitumen often have granular impurities on, so that relatively large nozzle openings for spraying are necessary.
  • the necessary large nozzle openings cause a relatively high order quantity of the Binder per unit area, with mobile pavers only a relatively low driving speed may have, whereby the order quantity by far gets high.
  • the method according to the invention overcomes these disadvantages in that the spray nozzles intermittently and be switched off, so that successive on the surface if necessary overlapping spray spots generated be the duty cycle of the spray nozzles is dimensioned such that the desired on the spray spot Amount of binder is applied.
  • the road surface according to the invention consisting of the substrate, binder layer and asphalt surface is characterized in that the binder layer is flux bitumen in an amount below 0.5 kg / m 2 , preferably between 0.1 and 0.2 kg / m 2 .
  • the flux bitumen used according to the invention as a binder is preferably characterized in that 50 to 99 Mass% bitumen or bitumen-like substances and as a flux component 1 to 50% by mass of vegetable oil, such as rapeseed oil or rapeseed oil derivative or suitable mineral oils mixed become.
  • Bitumen-like substances are, for example. Polymer bitumen, Tar pitches, residue residues from fatty acid distillation or synthetic and natural resins or Polymers.
  • 0.1 to 5 mass% (based on the Binder phase) of an adhesive such as those based on fatty amine be provided.
  • the viscosity of the flux bitumen is set so that it is cold roughly corresponds to the consistency of honey, which is tough of 10 Pascal seconds.
  • the flux bitumen at room temperature is made from an unheated binder tank via a feed line to the spray nozzles, the flux bitumen in the feed line to a temperature heated below 100 ° C, particularly preferably about 80 ° C becomes. The temperature increase before spraying will So made in the feed line, so that not large Volumes need to be preheated.
  • An exemplary composition of the flux bitumen exists from about 70% by weight of bitumen B 200, 25 to 29.9% by weight Flux oil and about 0.1 to 5% by weight of adhesive.
  • Varying the pulse-pause ratio can be a dosage control depending on the driving speed of the paver.
  • the control the spray nozzles can also be such that the Spray nozzles are combined into spray groups that alternate Spray flux bitumen, i.e. that e.g. only each second or third nozzle briefly splashes, so that one temporally and spatially staggered but cascading Dosage from circular placed side by side Surfaces arises. Typically they have Areas of about 20 cm in diameter, which can also be can overlap.
  • the control of the spray nozzles can e.g. also be done that the metering pump via electric solenoid valves or a corresponding pneumatic control e.g. in the Second intervals switched through on individual nozzles in sequence becomes.
  • This cascading Control has the advantage that you can with a small Pump performance gets by, each only for the supply of a few of the individual spray nozzles is sufficient.
  • the The pump could run continuously and the spray nozzles are switched through in intervals.
  • the pulsed mode of operation allows a relatively high one Spray pressure with good cleaning effect on the nozzle.
  • the driving speed is advantageously coupled of the paver with the pulse frequency or pulse / pause relation of the pump organs, or valves in order the dosing performance always optimal and fully automatic Adapt to requirements.
  • the immediate shutdown of the Dosing when the paver is at a standstill is also included no problem.
  • the binder demonstrates Room temperature preferably has a viscosity of about 10 Pa.s on. This makes the binder flowable when cold and pumpable, but only flows slowly through thin ones Tube.
  • the agent is preferred for spraying by means of nozzles heated in the supply pipe to the spray nozzles.
  • the effort is kept low if a simple one Pipe trace heating is provided, for example. an electric Heating tape.
  • Appropriate pipe routing can also be used Energy of the hot mix stored in the paver be used for preheating. In practice it turns out a temperature of 80 ° C is sufficient for one good sprayability. With an order quantity of accepted 60 kg of binder per hour is practical Conditions a heating energy requirement of only 5 KWh per Hour.
  • the binder used according to the invention with less Order quantity per unit area also solves the problem the placement of the pre-injection material on the paver. This is especially true when the spraying means placed on conventional pavers in storage tanks shall be. Since according to the invention to be applied Amounts are very small, a tank is sufficient from 50 to 100 liters, which takes about 2 hours of installation time enough. Such a small storage tank is on every ceiling paver to accommodate later. Such a retrofit is much cheaper than the purchase a combined pre-spray paver.
  • the Binder can be used together with the mix truck, for example. With every fifth load will be delivered later. To do this the truck is only equipped with a small tank his.
  • the truck gets the hot mix at the mixing plant picks up, he simultaneously couples the binder hose and fills from the flux bitumen storage tank, the is installed at a suitable location in the mixing plant, into his little tank. Arrived at the paver is during the tipping of the mix into the Finished trough also the flux bitumen supply from the small one Truck tank in the paver's flux bitumen tank through one Refilled hose.
  • the additional effort is limited to that Coupling and uncoupling the hose at the mixing plant and at the paver. A delay in construction progress does not occur.
  • aqueous bitumen emulsions e.g. 500 liter tanks
  • refilling large volumes of aqueous bitumen emulsions increased logistical and equipment-related effort, because Appropriate mix trucks and tankers in succession to the paver to be unloaded to be able to.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Road Paving Structures (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Working-Up Tar And Pitch (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Polarising Elements (AREA)

Abstract

A method for preparing asphalt paving without undue delay between preparing the base and applying the asphalt. The base is prepared by spraying a flux bitumen binder immediately before laying the asphalt. The binder is taken from a non heated tank and is heated prior to spraying by separate heaters on the supply lines to the spray heads, or by looping the supply lines through the reservoir of hot asphalt. The spray heads are applied in an alternating manner, with controlled overspray, to prevent clogging. The binder is applied with a thickness of 0.1 to 0.2 kg per square meter.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen eines Asphaltbelages auf Flächen, wie Straßen, Wege und dgl., wobei ein Bindemittel vorgespritzt und unmittelbar danach der Asphaltbelag aufgebracht wird. Es handelt sich also um ein Verfahren zur Herstellung des Schicht- und Lagenverbundes im Asphaltstraßenbau. Weiters betrifft die Erfindung eine Vorrichtung zum Versprühen von Bindemittel vor der Aufbringung eines Asphaltbelages, wobei die Vorrichtung aus einem Bindemitteltank, mindestens einer damit verbundenen Zuleitung und damit verbundenen Sprühdüsen besteht, sowie einen Deckenfertiger mit einem Heißmischgutbehälter und einem Bindemitteltank. Schließlich bezieht sich die Erfindung auch auf eine Straßendecke, die nach dem erfindungsgemäßen Verfahren gefertigt wurde.The invention relates to a method for producing a Asphalt pavement on surfaces such as roads, paths and the like, with a binder pre-injected and immediately afterwards the asphalt surface is applied. So it's about a process for the production of the layer and layer composite in asphalt road construction. The invention further relates to a device for spraying binder before applying an asphalt surface, the device from a binder tank, at least one with it connected supply line and associated spray nozzles exists, as well as a paver with a hot mix container and a binder tank. Finally The invention also relates to a road surface, which was manufactured by the method according to the invention.

Es ist seit langer Zeit bekannt, vor dem Auftragen eines Asphaltbelages auf einem Untergrund, wie z.B. einem alten Straßenbelag oder einer neuen Asphaltschicht von Straßen, Wegen, Plätzen und dgl. eine Bitumenemulsion als Bindemittel zum Zwecke der Verbesserung des Haftverbundes der Schichten aufzusprühen, wobei die Bitumenemulsion einen hohen Wasseranteil aufweist. Daher war es notwendig, die Bitumenemulsion eine längere Zeitspanne vor dem Einbauen des Asphaltbelages aufzusprühen, so daß in diesem Zeitraum das Wasser verdunsten konnte. In der Praxis kommt es dabei leicht zu einer Beschädigung der Bindemittelschicht, was die Haftung des Asphaltbelages verringert. It has been known for a long time before applying one Asphalt surface on a surface, e.g. an old one Road surface or a new asphalt layer of roads, Because of, places and the like. A bitumen emulsion as a binder for the purpose of improving the adhesive network of the Spray layers, the bitumen emulsion a has a high water content. Therefore, it was necessary to Bitumen emulsion a longer period of time before installation to spray the asphalt surface, so that in this period the water could evaporate. In practice it happens easily damage the binder layer, which reduces the adhesion of the asphalt surface.

Weiters sind z.B. aus der DE 41 01 417 C Deckenfertiger zum maschinellen Einbauen eines Asphaltbelages bekannt geworden, die im gleichen Arbeitsgang die bekannte wässrige Bitumenemulsion aufsprühen. Durch den hohen Wasseranteil der Emulsion kommt es jedoch in nachteiliger Weise, vor allem bei dünnen Lagen, zu einer erheblichen Abkühlung des aufgetragenen Asphalt-Mischgutes zufolge der Verdunstungswärme. Weiters kann es zu Dampfblasenbildungen kommen. Dadurch wird die Haftung zwischen Untergrund und Asphaltbelag nachteilig beeinflußt. Überdies weist dieser Deckenfertiger den Nachteil auf, daß für die wässrige Bitumenemulsion hohe Tankvolumen nötig sind, die auf herkömmlichen Konstruktionen für Deckenfertiger nicht untergebracht werden können. Somit war es notwendig, eine völlig neue Deckenfertiger-Konstruktion zu konzipieren, was kostenmäßige Nachteile hat.Furthermore, e.g. from DE 41 01 417 C paver known for the mechanical installation of an asphalt surface become the well-known watery in the same operation Spray on bitumen emulsion. Due to the high water content the emulsion, however, disadvantageously especially in thin layers, to a considerable cooling of the applied asphalt mix according to the Evaporation heat. Furthermore, it can lead to vapor bubble formation come. This will cause liability between the subsurface and asphalt surface adversely affected. Moreover, points this paver has the disadvantage that for the watery Bitumen emulsion high tank volumes that are necessary conventional structures for pavers not accommodated can be. So it was necessary to to design a completely new paver construction, which has cost disadvantages.

Ziel der vorliegenden Erfindung war es unter anderem, zum Vorsprühen ein Bindemittel zu verwenden, welches wasser- und lösungsmittelfrei ist. Das Vorsprühen soll durch den Deckenfertiger unmittelbar vor dem Auftragen der Asphaltschicht erfolgen, ohne die beschriebenen Nachteile mit sich zu bringen. Die Haftung zwischen Untergrund und Asphaltbelag soll auch bei niedrigen Umgebungstemperaturen den Anforderungen entsprechen.The aim of the present invention was, inter alia, to Pre-spray to use a binder that is water- and is solvent free. The pre-spraying should be done by the Paver immediately before applying the asphalt layer take place without the disadvantages described to bring oneself. Liability between underground and Asphalt pavement should also be used at low ambient temperatures comply with the requirements.

Die Anmelderin hat als Bindemittel das sogenannte Fluxbitumen entwickelt, gemäß österreichischer Patentanmeldung A 1161/94. Dabei wird das Bitumen durch Fluxöle , wie zB. Rapsöl, in eine fließfähige verarbeitbare Form gebracht, wobei durch die Schwerflüchtigkeit der Fluxöle keine nennenswerte Lösungsmittelverdunstung eintritt.The applicant has the so-called flux bitumen as a binder developed according to the Austrian patent application A 1161/94. The bitumen is thereby flux oils, such as. Rapeseed oil, brought into a flowable, processable form, due to the low volatility of the flux oils no significant Evaporation of solvent occurs.

Gemäß vorliegender Erfindung hat sich überraschend gezeigt, daß derartiges Fluxbitumen hervorragend geeignet ist, als Bindemittel zum Vorspritzen vor dem Auftragen eines Asphaltes mit einem Deckenfertiger verwendet zu werden, wobei die aufzutragenden Mengen pro Flächeneinheit wesentlich geringer sind, als bei herkömmlichen Bitumenemulsionen. Fluxbitumen war bisher als zum Vorspritzen völlig ungeeignet angesehen worden, weil ein Vorspritzmittel möglichst hart abbinden soll. Demgegenüber war Fluxbitumen dafür bekannt, für einen bestimmten Zeitraum relativ weich zu sein. Dieser Nachteil tritt jedoch dann nicht auf, wenn die Fluxbitumenschicht sehr dünn ist, da die Fluxbestandteile (Fluxöle) von der darüber aufgebrachten Mischgutschicht und den porösen Untergrund durch Diffusion abgezogen werden. Die erfindungsgemäße Auftragmenge liegt bevorzugt unter 0,5 kg/m2, besonders bevorzugt zwischen 0,1 und 0,2 kg/m2. Höhere Auftragsmengen können in Sonderfällen vorteilhaft sein, z.B. wenn eine stark ausgemagerte, rissige oder gefräste Unterlage vorliegt.According to the present invention, it has surprisingly been found that such flux bitumen is excellently suited to be used as a binder for pre-spraying with a paver before applying asphalt, the amounts to be applied per unit area being significantly less than with conventional bitumen emulsions. Flux bitumen had previously been regarded as completely unsuitable for spraying because a spraying agent should set as hard as possible. In contrast, flux bitumen was known to be relatively soft for a period of time. However, this disadvantage does not occur if the flux bitumen layer is very thin, since the flux constituents (flux oils) are removed by diffusion from the mixed material layer applied above and the porous substrate. The application amount according to the invention is preferably less than 0.5 kg / m 2 , particularly preferably between 0.1 and 0.2 kg / m 2 . Higher order quantities can be advantageous in special cases, for example if there is a heavily lean, cracked or milled surface.

Das Auftragen niedriger Dosiermengen auf Straßenoberflächen stellt jedoch ein Problem dar. Bituminöse Bindemittel und auch Fluxbitumen weisen häufig körnige Verunreinigungen auf, sodaß relativ große Düsenöffnungen zum Vorspritzen nötig sind. Die notwendigen großen Düsenöffnungen verursachen jedoch eine relativ hohe Auftragmenge des Bindemittels pro Flächeneinheit, wobei fahrbare Deckenfertiger nur eine relativ geringe Fahrgeschwindigkeit aufweisen können, wodurch die Auftragmenge bei weitem zu hoch wird.Applying low doses to road surfaces however, is a problem. Bituminous binders and also flux bitumen often have granular impurities on, so that relatively large nozzle openings for spraying are necessary. The necessary large nozzle openings cause a relatively high order quantity of the Binder per unit area, with mobile pavers only a relatively low driving speed may have, whereby the order quantity by far gets high.

Das erfindungsgemäße Verfahren überwindet diese Nachteile dadurch, daß die Sprühdüsen zeitlich intermittierend ein- und ausgeschaltet werden, sodaß auf der Fläche aufeinanderfolgende gegebenenfalls überlappende Sprühflecken erzeugt werden, wobei die Einschaltdauer der Sprühdüsen derart bemessen ist, daß auf dem Sprühfleck die gewünschte Bindemittelmenge aufgetragen wird.The method according to the invention overcomes these disadvantages in that the spray nozzles intermittently and be switched off, so that successive on the surface if necessary overlapping spray spots generated be the duty cycle of the spray nozzles is dimensioned such that the desired on the spray spot Amount of binder is applied.

Die erfindungsgemäße Straßendecke bestehend aus Untergrund, Bindemittelschicht und Asphaltdecke ist dadurch gekennzeichnet, daß die Bindemittelschicht Fluxbitumen in einer Menge unter 0,5 kg/m2, bevorzugt zwischen 0,1 und 0,2 kg/m2 ist.The road surface according to the invention consisting of the substrate, binder layer and asphalt surface is characterized in that the binder layer is flux bitumen in an amount below 0.5 kg / m 2 , preferably between 0.1 and 0.2 kg / m 2 .

Das erfindungsgemäß als Bindemittel eingesetzte Fluxbitumen ist bevorzugt dadurch gekennzeichnet daß 50 bis 99 Masse % Bitumen oder bitumenähnliche Stoffe und als Fluxkomponente 1 bis 50 Masse % pflanzliches Öl, wie Rapsöl oder Rapsölderivat oder auch geeignete Mineralöle vermischt werden. Bitumenähnliche Stoffe sind zB. Polymerbitumen, Teerpeche, Rückstandspeche aus der Fettsäuredestillation oder synthetische und natürliche Harze oder Polymere. Weiters kann 0,1 bis 5 Masse % (bezogen auf die Bindemittelphase) eines Haftmittels wie solche auf Fettaminbasis vorgesehen sein. Die Viskosität des Fluxbitumens wird derart eingestellt, daß es in kaltem Zustand etwa der Konsistenz von Honig entspricht, was einer Zähigkeit von 10 Pascalsekunden entspricht. Bei Erwärmung auf eine Temperatur unter 100 °C, bevorzugt etwa 80° C verringert sich die Viskosität, sodaß es verdüsbar ist. Diese Viskositätswerte sind leicht handzuhaben. Es ist in wirtschaftlicher Weise möglich, das Fluxbitumen bei Raumtemperatur zu lagern und zu transportieren. Erfindungsgemäß wird das Fluxbitumen aus einem ungeheizten Bindemitteltank über eine Zuleitung zu den Sprühdüsen geleitet, wobei das Fluxbitumen in der Zuleitung auf eine Temperatur unter 100°C, insbesondere bevorzugt etwa 80°C, erwärmt wird. Die Temperaturerhöhung vor dem Verdüsen wird also in der Zuleitung vorgenommen, so daß nicht große Volumina vorgeheizt werden müssen.The flux bitumen used according to the invention as a binder is preferably characterized in that 50 to 99 Mass% bitumen or bitumen-like substances and as a flux component 1 to 50% by mass of vegetable oil, such as rapeseed oil or rapeseed oil derivative or suitable mineral oils mixed become. Bitumen-like substances are, for example. Polymer bitumen, Tar pitches, residue residues from fatty acid distillation or synthetic and natural resins or Polymers. Furthermore, 0.1 to 5 mass% (based on the Binder phase) of an adhesive such as those based on fatty amine be provided. The viscosity of the flux bitumen is set so that it is cold roughly corresponds to the consistency of honey, which is tough of 10 Pascal seconds. When warming to a temperature below 100 ° C, preferably about 80 ° C the viscosity decreases so that it can be sprayed. These viscosity values are easy to use. It is in Economically possible, the flux bitumen at room temperature to store and transport. According to the invention the flux bitumen is made from an unheated binder tank via a feed line to the spray nozzles, the flux bitumen in the feed line to a temperature heated below 100 ° C, particularly preferably about 80 ° C becomes. The temperature increase before spraying will So made in the feed line, so that not large Volumes need to be preheated.

Eine beispielhafte Zusammensetzung des Fluxbitumens besteht aus etwa 70 Gew.% Bitumen B 200, 25 bis 29,9 Gew.% Fluxöl und etwa 0,1 bis 5 Gew.% Haftmittel.An exemplary composition of the flux bitumen exists from about 70% by weight of bitumen B 200, 25 to 29.9% by weight Flux oil and about 0.1 to 5% by weight of adhesive.

Bei dem erfindungsgemäßen Auftragen des Fluxbitumens werden die Sprühdüsen nicht kontinuierlich gespeist, sondern nur kurzzeitig mit einer nachgeschalteten Ruhepause. Durch steuerungstechnisch relativ einfach durchzuführende Variation des Puls-Pausenverhältnisses kann eine Dosiermengenregelung in Abhängigkeit von der Fahrgeschwindigkeit des Deckenfertigers vorgenommen werden. Die Ansteuerung der Sprühdüsen kann auch so beschaffen sein, daß die Sprühdüsen zu Sprühgruppen zusammengefaßt sind, die abwechselnd Fluxbitumen versprühen, d.h., daß z.B. nur jede zweite oder dritte Düse kurzzeitig spritzt, so daß eine zeitlich und räumlich versetzte aber flächendeckende kaskadenförmige Dosierung aus nebeneinander gesetzten kreisförmigen Flächen entsteht. Typischerweise haben diese Flächen einen Durchmesser von etwa 20 cm, die sich auch überlappen können.When applying the flux bitumen according to the invention the spray nozzles are not continuously fed, but only briefly with a subsequent break. Due to the control technology being relatively easy to carry out Varying the pulse-pause ratio can be a dosage control depending on the driving speed of the paver. The control the spray nozzles can also be such that the Spray nozzles are combined into spray groups that alternate Spray flux bitumen, i.e. that e.g. only each second or third nozzle briefly splashes, so that one temporally and spatially staggered but cascading Dosage from circular placed side by side Surfaces arises. Typically they have Areas of about 20 cm in diameter, which can also be can overlap.

Bei einer Einbaubreite des Deckenfertigers von 4 m und einer Fahrgeschwindigkeit von 2 m pro Minute wären z.B. eine Fläche von 8 m2 pro Minute mit insgesamt ca 1 kg Bindemittel zu besprühen. Sind die Düsen in einem Abstand von 20 cm angeordnet, sind 20 Düsen erforderlich, von denen jede nur 50 g pro Minute sprühen darf. Dies entspricht also einer Dosierleistung von weniger als 1 g Bindemittel pro Sekunde pro Düse. Der Fertiger bewegt sich pro Sekunde nur 1,7 cm fort. Beträgt der Düsenkegelkreisdurchmesser die genannten 20 cm, dann genügt es, wenn die Düse eine Sekunde sprüht und danach 10 Sekunden Pause macht. Die beiden Sprühflecken überlappen sich dann gerade noch um 3 cm. Diese geringe Dosierung pro Flächeneinheit wird dabei mit einer Düse erzielt, die einem Durchsatz von 500 g je Minute entspricht. With a paving width of 4 m and a driving speed of 2 m per minute, an area of 8 m 2 per minute would have to be sprayed with a total of approx. 1 kg of binding agent. If the nozzles are spaced 20 cm apart, 20 nozzles are required, each of which may only spray 50 g per minute. This corresponds to a dosing rate of less than 1 g of binder per second per nozzle. The paver only moves 1.7 cm per second. If the nozzle cone circle diameter is 20 cm, then it is sufficient if the nozzle sprays for one second and then pauses for 10 seconds. The two spray spots then just overlap by 3 cm. This low dosage per unit area is achieved with a nozzle that corresponds to a throughput of 500 g per minute.

Die Ansteuerung der Sprühdüsen kann z.B. auch so erfolgen, daß die Dosierpumpe über elektrische Magnetventile oder eine entsprechende pneumatische Steuerung z.B. im Sekundenabstand auf einzelne Düsen der Reihe nach durchgeschaltet wird. Die Reihe Sprühdüsen des Deckenfertigers werden in diesem Fall nicht gleichzeitig, sondern in rascher Abfolge nacheinander gespeist. Diese kaskadenartige Ansteuerung hat den Vorteil, daß man mit einer kleinen Pumpenleistung auskommt, die jeweils nur für die Versorgung von wenigen der einzelnen Sprühdüsen ausreicht. Die Pumpe könnte im Dauerlauf betrieben werden und die Sprühdüsen werden intervallweise nacheinander durchgeschaltet. Die impulsartige Betriebsweise erlaubt einen relativ hohen Sprühdruck mit gutem Reinigungseffekt auf die Düse.The control of the spray nozzles can e.g. also be done that the metering pump via electric solenoid valves or a corresponding pneumatic control e.g. in the Second intervals switched through on individual nozzles in sequence becomes. The range of spray nozzles from the paver finisher in this case, not at the same time, but more quickly Sequence fed one after the other. This cascading Control has the advantage that you can with a small Pump performance gets by, each only for the supply of a few of the individual spray nozzles is sufficient. The The pump could run continuously and the spray nozzles are switched through in intervals. The pulsed mode of operation allows a relatively high one Spray pressure with good cleaning effect on the nozzle.

Alternativ ist es auch möglich, jede Sprühdüse mit einer eigenen Kolben- oder Membrandosierpumpe anzusteuern und zu speisen.Alternatively, it is also possible to use a spray nozzle control your own piston or diaphragm metering pump and to dine.

In vorteilhafter Weise erfolgt eine Kopplung der Fahrgeschwindigkeit des Deckenfertigers mit der Impulsfrequenz oder Puls/Pausenrelation der Pumporgane, oder Ventile, um die Dosierleistung stets optimal und vollautomatisch den Erfordernissen anzupassen. Das unmittelbare Abstellen der Dosierung bei Stillstand des Fertigers ist dabei ebenfalls kein Problem.The driving speed is advantageously coupled of the paver with the pulse frequency or pulse / pause relation of the pump organs, or valves in order the dosing performance always optimal and fully automatic Adapt to requirements. The immediate shutdown of the Dosing when the paver is at a standstill is also included no problem.

Wie zuvor bereits ausgedrückt, weist das Bindemittel bei Raumtemperatur bevorzugt eine Viskosität von etwa 10 Pa.s auf. Damit ist das Bindemittel in kaltem Zustand fließfähig und pumpfähig, fließt aber nur langsam durch dünne Rohre. Zum Versprühen mittels Düsen wird das Mittel bevorzugt im Zuleitungsrohr zu den Sprühdüsen aufgeheizt. Der Aufwand wird gering gehalten, wenn eine einfache Rohrbegleitheizung vorgesehen wird, zB. ein elektrisches Heizband. Durch entsprechende Rohrführung kann auch die Energie des im Deckenfertiger gelagerten Heißmischgutes zur Vorwärmung mitgenutzt werden. In der Praxis erweist sich eine Temperatur von 80° C als ausreichend für eine gute Versprühbarkeit. Bei einer Auftragmenge von angenommen 60 kg Bindemittel pro Stunde, ist unter praktischen Bedingungen ein Heizenergiebedarf von lediglich 5 KWh pro Stunde anzunehmen.As previously stated, the binder demonstrates Room temperature preferably has a viscosity of about 10 Pa.s on. This makes the binder flowable when cold and pumpable, but only flows slowly through thin ones Tube. The agent is preferred for spraying by means of nozzles heated in the supply pipe to the spray nozzles. The effort is kept low if a simple one Pipe trace heating is provided, for example. an electric Heating tape. Appropriate pipe routing can also be used Energy of the hot mix stored in the paver be used for preheating. In practice it turns out a temperature of 80 ° C is sufficient for one good sprayability. With an order quantity of accepted 60 kg of binder per hour is practical Conditions a heating energy requirement of only 5 KWh per Hour.

Das erfindungsgemäß verwendete Bindemittel mit geringer Auftragsmenge pro Flächeneinheit löst auch das Problem der Unterbringung des Vorpritzmaterials am Deckenfertiger. Dies gilt insbesondere dann, wenn das Vorspritzmittel auf herkömmlichen Deckenfertigern in Lagertanks untergebracht werden soll. Da gemäß Erfindung die aufzutragenden Mengen sehr klein sind, genügt bereits ein Tank von 50 bis 100 Liter, was für etwa 2 Stunden Einbauzeit genügt. Ein derart kleiner Lagertank ist auf jedem Dekkenfertiger nachträglich unterzubringen. Eine solche Umrüstung ist wesentlich kostengünstiger als die Anschaffung eines kombinierten Vorspritz-Deckenfertigers. Das Bindemittel kann gemeinsam mit dem Mischgut - LKW zB. mit jeder fünften Fuhre nachgeliefert werden. Dazu braucht der LKW lediglich mit einem kleinen Tank ausgestattet sein. Wenn der LKW das heiße Mischgut bei der Mischanlage abholt, koppelt er gleichzeitig den Bindemittelschlauch an und füllt aus dem Fluxbitumen- Vorratslagertank, der bei der Mischanlage an geeigneter Stelle aufgestellt ist, in seinen kleinen Tank nach. Angekommen beim Deckenfertiger wird während des Einkippens des Mischgutes in die Fertigermulde auch der Fluxbitumenvorrat aus dem kleinen LKW-Tank in den Fluxbitumentank des Fertigers durch einen Schlauch nachgefüllt.The binder used according to the invention with less Order quantity per unit area also solves the problem the placement of the pre-injection material on the paver. This is especially true when the spraying means placed on conventional pavers in storage tanks shall be. Since according to the invention to be applied Amounts are very small, a tank is sufficient from 50 to 100 liters, which takes about 2 hours of installation time enough. Such a small storage tank is on every ceiling paver to accommodate later. Such a retrofit is much cheaper than the purchase a combined pre-spray paver. The Binder can be used together with the mix truck, for example. With every fifth load will be delivered later. To do this the truck is only equipped with a small tank his. When the truck gets the hot mix at the mixing plant picks up, he simultaneously couples the binder hose and fills from the flux bitumen storage tank, the is installed at a suitable location in the mixing plant, into his little tank. Arrived at the paver is during the tipping of the mix into the Finished trough also the flux bitumen supply from the small one Truck tank in the paver's flux bitumen tank through one Refilled hose.

Der zusätzliche Aufwand beschränkt sich alleine auf das An- und Abkoppeln des Schlauches bei der Mischanlage und beim Deckenfertiger. Eine Verzögerung des Baufortschrittes tritt nicht ein.The additional effort is limited to that Coupling and uncoupling the hose at the mixing plant and at the paver. A delay in construction progress does not occur.

Demgegenüber erfordert das Nachfüllen großer Volumen von wässrigen Bitumenemulsionen (zB. 500 Liter Tanks) einen erhöhten logistischen und apparatemäßigen Aufwand, da entsprechende Mischgut-LKW und Tankfahrzeuge nacheinander an den Deckenfertiger herangeführt werden müssen, um entladen zu können.In contrast, refilling large volumes of aqueous bitumen emulsions (e.g. 500 liter tanks) increased logistical and equipment-related effort, because Appropriate mix trucks and tankers in succession to the paver to be unloaded to be able to.

Der Einsatz von Fluxbitumen als Bindemittel erlaubt einen vereinfachten Zutransport mittels schon vorhandener Geräte infrastruktur, bestehend aus Asphaltmischanlage, Mischgut-LKW und Asphaltfertiger. Bisher braucht man zusätzlich einen separaten LKW oder Tankwagen, der die begrenzt lagerfähige und frostempfindliche Bitumenemulsion (im Frühjahr und Herbst oft ein nicht unerhebliches Problem) zur Baustelle befördert, ein separates Spritzgerät mit Personal, das termingerecht und mehrere Stunden vor der Bauausführung die Bitumenemulsion auf die Unterlage aufspritzt und erst wenn der Vorspritzfilm trocken ist, darf der Fertiger die Asphaltschicht einbauen. Damit, daß dabei der Mischgut-LKW häufig den Vorspritzfilm zerstört, mußte man sich bisher weltweit abfinden. Bei Verwendung von Fluxbitumen als Bindemittel kann die Logistik des Vorspritzmittels völlig neu gestaltet werden:

  • Anlieferung einmal jährlich (z.B. in der arbeitsfreien Winterzeit) in einen großen Standtank bei der Mischanlage (das Fluxbitumen ist nicht frostempfindlich und unbegrenzt lagerfähig).
  • Durch die im kalten Zustand fließfähige Fluxbitumenkonsistenz braucht der Standtank nicht beheizt zu werden und der Mischgut-LKW kann bei der Abholung des Mischgutes an der Mischanlage jederzeit seinen kleinen "Zupendlertank" (z.B. in Form einer tankartig ausgeführten doppelwandigen Bordwand) füllen (50 bis 100 Liter reichen aus) und beim Einkippen des Mischgutes in die Mulde des Fertigers wieder abgeben. Die heiße Mischgutladung wärmt das Fluxbitumen etwas vor, so daß es in erwünschter Weise dünnflüssig wird.
  • Es müssen lediglich Schläuche angekuppelt werden, aber es ist kein zusätzlicher Geräte-, Personal- oder Organisationsaufwand erforderlich.
The use of flux bitumen as a binder enables simplified transport using the existing equipment infrastructure, consisting of an asphalt mixing plant, a mix truck and an asphalt paver. So far, a separate truck or tanker has been required to transport the bitumen emulsion, which can be stored for a limited time and is sensitive to frost (often a not inconsiderable problem in spring and autumn), a separate spraying device with personnel that applies the bitumen emulsion to the site on time and several hours before construction begins The surface is sprayed on and only when the pre-spray film is dry can the paver install the asphalt layer. So far, that the mix truck often destroys the pre-sprayed film, one had to accept that worldwide. When using flux bitumen as a binding agent, the logistics of the pre-spraying agent can be completely redesigned:
  • Delivery once a year (e.g. in the non-working winter period) in a large standing tank at the mixing plant (the flux bitumen is not sensitive to frost and can be stored indefinitely).
  • Due to the flow bituminous consistency, the standing tank does not need to be heated and the mixed goods truck can fill its small "commuter tank" (e.g. in the form of a double walled side wall) (50 to 100 liters are sufficient) and return when the mix is poured into the paver of the paver. The hot mix load preheats the flux bitumen somewhat so that it becomes thin in the desired manner.
  • Only hoses need to be connected, but no additional equipment, personnel or organizational effort is required.

Claims (14)

Verfahren zum Herstellen eines Asphaltbelages auf Flächen, wie Straßen, Wege und. dgl., wobei ein Bindemittel vorgespritzt und unmittelbar danach der Asphaltbelag aufgebracht wird, dadurch gekennzeichnet, daß als Bindemittel Fluxbitumen verwendet wird, welches wasserfrei und im wesentlichen lösungsmittelfrei ist.Process for producing asphalt covering on surfaces, like roads, paths and. Like., With a binder pre-sprayed and immediately applied the asphalt surface is characterized in that as a binder Fluxbitumen is used, which is anhydrous and in is essentially solvent-free. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß Fluxbitumen in einer Menge unter 0,5 kg/m2, bevorzugt zwischen 0,1 und 0,2 kg/m2 aufgespritzt wird.Process according to Claim 1, characterized in that flux bitumen is sprayed on in an amount of less than 0.5 kg / m 2 , preferably between 0.1 and 0.2 kg / m 2 . Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Fluxbitumen in an sich bekannter Weise durch Sprühdüsen verspritzt wird, die über die Fläche bewegt und zeitlich intermittierend ein- und ausgeschaltet werden, sodaß auf der Fläche aufeinanderfolgende, gegebenenfalls überlappende Sprühflecken erzeugt werden, wobei die Einschaltdauer der Sprühdüsen derart bemessen ist, daß auf dem Sprühfleck die gewünschte Bindemittelmenge aufgetragen wird.A method according to claim 1 or 2, characterized in that that the flux bitumen in a manner known per se Spray nozzles is sprayed that moves across the surface and are switched on and off intermittently, so that successive on the surface, if necessary overlapping spray spots are generated, the Duty cycle of the spray nozzles is such that the desired amount of binder is applied to the spray stain becomes. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Sprühdüsen zu Sprühgruppen zusammengefaßt sind, die abwechselnd Fluxbitumen versprühen und eine zeitlich und räumlich versetzte aber flächendeckende kaskadenförmige Dosierung des Fluxbitumens ergeben.A method according to claim 3, characterized in that the spray nozzles are combined into spray groups, the alternately spray flux bitumen and a time and spatially offset but area-wide cascade-shaped Dosage of the flux bitumen result. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Fluxbitumen aus einem ungeheizten Bindemitteltank über eine Zuleitung zu den Sprühdüsen geleitet wird, wobei das Fluxbitumen in der Zuleitung auf eine Temperatur unter 100°C, insbesondere bevorzugt etwa 80°C erwärmt wird. Method according to one of the preceding claims, characterized characterized in that the flux bitumen from an unheated Binder tank via a feed line to the spray nozzles is conducted, the flux bitumen in the feed line to a temperature below 100 ° C, particularly preferred is heated to about 80 ° C. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die Erwärmung des Fluxbitumens durch eine Heizung in oder an der Zuleitung und/oder durch Abwärme des mit der Zuleitung in Wärmekontakt stehenden Asphaltmischgutes erwärmt wird.A method according to claim 5, characterized in that the heating of the flux bitumen by heating in or on the supply line and / or by waste heat from the supply line heated asphalt mix becomes. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß vor dem Aufspritzen des Fluxbitumens und dem Einbau des Asphaltbelages in an sich bekannter Weise Asphaltmischgut aus einer Mischgutanlage in einen Mischgut-LKW geladen wird und daß gleichzeitig Fluxbitumen aus einem unbeheizten Standtank in einen Bindemitteltank am Mischgut-LKW geladen wird und daß nach dem Transport zum Einbauort, das Asphaltmischgut in die Mulde eines Asphaltfertigers und gleichzeitig das Fluxbitumen in den Bindemitteltank des Asphaltfertigers umgeladen werden.Method according to one of the preceding claims, characterized characterized that before spraying the flux bitumen and the installation of the asphalt surface in a known manner Way asphalt mix from a mix plant in a mix truck is loaded and that at the same time Flux bitumen from an unheated standing tank into a binder tank is loaded on the mix truck and that after the transport to the installation site, the asphalt mix in the Trough of an asphalt paver and at the same time the flux bitumen transferred to the asphalt paver's binder tank become. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß das Fluxbitumen während des Transportes im Bindemitteltank des Mischgut-LKWs durch die Wärme des Asphaltmischgutes erwärmt wird.A method according to claim 7, characterized in that the flux bitumen during transport in the binder tank of the mix truck due to the warmth of the asphalt mix is heated. Vorrichtung zum Versprühen von Bindemittel vor der Aufbringung eines Asphaltbelages, wobei die Vorrichtung aus einem Bindemitteltank, mindestens einer damit verbundenen Zuleitung und damit verbundenen Sprühdüsen besteht, dadurch gekennzeichnet, daß der Bindemitteltank unbeheizt und die Zuleitung beheizt ist.Device for spraying binder in front of the Application of an asphalt surface, the device from a binder tank, at least one connected to it Supply line and associated spray nozzles, characterized in that the binder tank is unheated and the supply line is heated. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Sprühdüsen z.B. durch Öffnen und Schließen von Ventilen in den Sprühdüsen oder in der Zuleitung vor den Sprühdüsen, intermittierend angesteuert werden. Apparatus according to claim 9, characterized in that the spray nozzles e.g. by opening and closing Valves in the spray nozzles or in the supply line in front of the Spray nozzles can be controlled intermittently. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß benachbarte Sprühdüsen nacheinander ansteuerbar sind, sodaß eine zeitlich und räumlich versetzte aber flächendeckende kaskadenförmige Dosierung vorhanden ist.Apparatus according to claim 10, characterized in that neighboring spray nozzles can be activated one after the other, so that it covers a wide area in terms of time and space cascaded dosage is present. Deckenfertiger mit einem Heißmischgutbehälter und einem Bindemitteltank, dadurch gekennzeichnet, daß der Dekkenfertiger ein herkömmlicher Asphaltfertiger ist der mit einer Sprühvorrichtung mit Bindemitteltank nach einem der Ansprüche 9 bis 11 aus- bzw. nachgerüstet ist.Paving machine with one hot mix container and one Binder tank, characterized in that the blanket maker a conventional asphalt paver is the one with a spray device with a binder tank according to one of the Claims 9 to 11 is equipped or retrofitted. Deckenfertiger nach Anspruch 12, dadurch gekennzeichnet, daß die Zuleitung für das Bindemittel vom Bindemitteltank zu den Sprühdüsen in Wärmekontakt mit dem Heißmischgutbehälter steht, so daß es zum Wärmetausch zwischen dem Heißmischgut und dem Bindemittel in der Zuleitung kommt.Paving machine according to claim 12, characterized in that the feed line for the binder from the binder tank to the spray nozzles in thermal contact with the hot mix container stands so that it is used for heat exchange between the hot mix and the binder in the feed line is coming. Straßendecke bestehend aus Untergrund, Bindemittelschicht und Asphaltdecke, dadurch gekennzeichnet, daß die Bindemittelschicht Fluxbitumen in einer Menge unter 0,5 kg/m2, bevorzugt zwischen 0,1 und 0,2 kg/m2 ist.Road surface consisting of subsoil, binder layer and asphalt surface, characterized in that the binder layer is flux bitumen in an amount of less than 0.5 kg / m 2 , preferably between 0.1 and 0.2 kg / m 2 .
EP99890230A 1998-07-10 1999-07-07 Method for making asphalt coverings Expired - Lifetime EP0971072B1 (en)

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AT99890230T ATE239139T1 (en) 1998-07-10 1999-07-07 METHOD FOR PRODUCING AN ASPHALT PAVING

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AT119898 1998-07-10
AT0119898A AT407717B (en) 1998-07-10 1998-07-10 METHOD FOR SPRAYING SURFACES

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EP1323867A1 (en) * 2001-12-27 2003-07-02 Appia Process for preparing a bituminous aggregate for roads
EP1489232A2 (en) 2003-06-12 2004-12-22 Strassmayr Maschinenbaugesellschaft m.b.H. & Co. KG Apparatus for applying a binder for an asphaltic paving on a traffic surface
EP3156544A1 (en) * 2015-10-14 2017-04-19 Bornit-Werk Aschenborn GmbH Method and device for applying bitumen-containing and solvent-free porous filling material for sealing asphalt streets

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EP1489232A2 (en) 2003-06-12 2004-12-22 Strassmayr Maschinenbaugesellschaft m.b.H. & Co. KG Apparatus for applying a binder for an asphaltic paving on a traffic surface
EP3156544A1 (en) * 2015-10-14 2017-04-19 Bornit-Werk Aschenborn GmbH Method and device for applying bitumen-containing and solvent-free porous filling material for sealing asphalt streets

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AT407717B (en) 2001-05-25
EP0971072B1 (en) 2003-05-02
DE59905286D1 (en) 2003-06-05
ATA119898A (en) 2000-10-15
DK0971072T3 (en) 2003-08-25
ATE239139T1 (en) 2003-05-15
ES2198877T3 (en) 2004-02-01

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