EP2146005B1 - Noise protection element - Google Patents

Noise protection element Download PDF

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Publication number
EP2146005B1
EP2146005B1 EP09165702.3A EP09165702A EP2146005B1 EP 2146005 B1 EP2146005 B1 EP 2146005B1 EP 09165702 A EP09165702 A EP 09165702A EP 2146005 B1 EP2146005 B1 EP 2146005B1
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EP
European Patent Office
Prior art keywords
component
protection element
noise protection
slots
plastic
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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.)
Not-in-force
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EP09165702.3A
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German (de)
French (fr)
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EP2146005A3 (en
EP2146005A2 (en
Inventor
Adolf Lederer
Rudolf Fuhrmann
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Big Bau und Immobiliengesmbh
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Big Bau und Immobiliengesmbh
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Publication of EP2146005A2 publication Critical patent/EP2146005A2/en
Publication of EP2146005A3 publication Critical patent/EP2146005A3/en
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Publication of EP2146005B1 publication Critical patent/EP2146005B1/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0017—Plate-like elements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers

Definitions

  • the invention relates to a noise protection element, wherein the noise protection element comprises at least two superimposed plastic components, wherein a first component has a greater porosity than a second component, wherein the second component is formed from a pressed granules of plastic.
  • the invention relates to a use of several noise protection elements.
  • the invention relates to a use of used tires.
  • noise barriers According to the prior art noise barriers have become known, the z. B. are mounted along highways or are, as far as they pass through inhabited area. This is how the document reveals DE 42 20 547 A1 a noise protection element of the type mentioned above with a plate-shaped element of high strength, on which a layer consisting of a porous material is arranged as a sound absorbing means.
  • One problem with the known noise barriers is that they can often only be retrofitted with difficulty or not at all. In addition, an assembly is very expensive and requires heavy equipment. A reduction of the known noise barriers, which may possibly be required, is possible only with great effort. Another disadvantage is that the known noise barriers often have only an unsatisfactory sound absorption and must be built very high.
  • the object of the invention is to provide a noise protection element having a good sound absorption, easy to assemble and stable, at the same time has a certain flexibility and in particular for Mittelbetonleitance can be used so that they can be retrofitted with one or more noise protection elements if necessary.
  • the advantages achieved by the invention are, in particular, that targeted sound absorption is achieved by the different porosities of the two components made of plastic, since the two absorb at least slightly air-permeable components sound of different frequency.
  • the second component which has a lower porosity and therefore higher strength, serves as support for the first component.
  • a production of the noise protection element made of plastic makes it possible that this is not only basically lightweight, but also in a simple manner by gluing or other fastening methods, such as screwing on any objects is particularly easy to install.
  • a continuous production of plastics with certain porosities also gives the noise protection element a certain flexibility, so that this can also be arranged on tunnel walls or other locations where a curved contact or contact surface is given.
  • An inventive noise protection element can also be easily attached to a Mittelbetonleitwand or adapted to their shape.
  • the first component of a compressed fibrous plastic preferably with an average fiber length of 2 mm to 35 mm
  • the second component of a compressed granules of plastic preferably with an average granule size of 1 mm to 5 mm formed is.
  • the porosities are chosen so that sound is absorbed very well and at the same time consisting of granules component has such a strength that it considers the inherently less stable component of compressed fibrous plastic perfectly supports and therefore keeps its shape, and although even if the noise protection element is mounted bent.
  • the finished components can be produced at elevated temperature, for. B. more than 120 ° C, are pressed together. It is also possible that the first component is created first, after which the granulate of the second component is poured onto the finished first component and then compressed and simultaneously contacted with the first component. In the alternative, at least one of the plastics can also be used with one Adhesive be pressed. It is also possible to create both components in one single step by hot pressing.
  • a sound absorption can be further improved by the two components having slots, wherein the slots are arranged one above the other.
  • sound can penetrate into the plates and, depending on the shape of the slots, is also absorbed in the slots or adjacent areas of the components.
  • the slits provided in the first component are tapered in cross-section to the second component, so that as much sound as possible to be absorbed can enter and be absorbed therein.
  • the slots are formed at the transition region from the first component to the second component with the same cross section, so that sound to be absorbed penetrates as far as possible into the noise protection element, before it is absorbed by or in the noise protection element.
  • the slots provided in the second component may be rectangular in cross-section.
  • the components are formed as plates, which are preferably connected to each other by pressing at elevated temperature.
  • the plate-shaped design makes it possible that the noise protection element bent without damage and therefore can also be attached, for example, to curved tunnel walls.
  • spacers are further attached to the second component.
  • sound can partially pass through the slits of the noise protection element, is reflected by a surface to which the noise protection element is attached, and then strikes a rear side of the noise protection element, so that sound at the back the second component is absorbed.
  • the noise protection element can oscillate, which further contributes to an effective sound absorption.
  • recesses are provided in the region between the slots in the second component, wherein the recesses are preferably of different depths.
  • the recesses ensure that sound is caught at the rear of the noise protection element as it were, and when wells of different depths are provided, also sound of different frequencies can be effectively absorbed.
  • An inventive noise protection element can basically be used in all areas where high noise occurs, but is preferably applied along roads or railways, for example in Mittelbetonleit paragraphn of highways or highways.
  • noise protection element When producing a noise protection element according to the invention basically new materials can be used. However, it is preferred that used tires for producing a noise protection element according to the invention are used.
  • the tires which are no longer used or used tires of particular motor vehicles, can be brought by suitable machines in a fiber or granular form, which is state of the art.
  • the noise protection element 1 comprises a first component 2 made of a plastic and a second component 3, which is also formed from a plastic.
  • the two components 2, 3 are arranged one above the other and directly connected to each other, for example by pressing at high temperature and / or high pressure, without further elements for a connection of the components 2, 3 are provided.
  • Both the first component 2 and the second component 3 are formed from compressed plastic particles of small size.
  • the first component 2 consists of a fibrous plastic, which is formed of plastic fibers having an average length of 2 mm to 35 mm, preferably 5 mm to 25 mm.
  • the individual fibers which are preferably obtained by crushing waste tires, are pressed together, wherein, alternatively, an adhesive can be used to better bond the fibers.
  • the second component 3 is also made of a plastic, namely a granules of plastic, which can also be obtained by crushing waste tires.
  • the granules of plastic as the fibers in the production of the first component 2 is pressed, whereby an adhesive can be added for better bonding.
  • the second component 3 is porous.
  • the fibers used for the first component 2 as well as the granules used for the second component 3 are chosen with regard to a size of the plastic particles so that the noise protection element 1 overall has a sufficient stability, but is still flexible. Also for this reason, an average fiber length of a plastic used for the production of the first component 2 is preferably selected in a range of 2 mm to 35 mm. For larger fiber lengths there is a risk that the first component 2 too little is stable. On the other hand, shorter fiber lengths than 2 mm lead to a possibly too low porosity. For similar reasons, an average granule size for the granules of plastic for producing the second component 3 is preferably limited to 1 mm to 5 mm. In this area, there is an optimum of stability of the second component 3, which as mentioned also serves as a carrier for the first component 2, and a porosity.
  • the noise protection element 1 is fastened, for example, to a middle concrete guide wall of a highway so that the first component 2 faces a lane, while the second component 3, optionally in the region of spacers 7, is glued to a surface of an object. If, as in particular Fig. 1 and Fig. 5 it can be seen, the noise protection element 1 is additionally formed with slots 4, 5, sound can also be absorbed through the slots 4, 5.
  • the slots 4 are formed in the first component 2 in cross section to the lane out approximately with a funnel-shaped cross-section. As a result, incident sound is offered a relatively large surface, so that it can basically also be absorbed at the regions of the first component 2 defining the slots 4.
  • the noise protection element 1 As soon as sound passes through the slits 4, it strikes the slots 5 in the sequence which are formed in the transition region 6 between the first component 2 and the second component 3 with the same cross-section as the slits 4. If sound passes through the slots 5, the sound strikes a surface of an object on which the noise protection element 1 is attached, and is reflected from this surface to the back of the second component 3, wherein the sound due to the porous formation of the second Component 3 is absorbed by this. If the noise protection element 1, as already mentioned, is arranged with spacers 7 on or on a surface, then the noise protection element 1 may also vibrate when sound is applied, which additionally contributes to the absorption of sound.
  • 3 recesses 8 may additionally be provided in the second component, which lie in those areas which correspond slot-free areas 9 of the first component 2. Reflected sound catches in these recesses 8, thereby increasing further the effectiveness of sound absorption is possible.
  • the recesses 8 are preferably formed with different depths, so that sound of different frequencies is well absorbed.
  • an effective sound absorption in a wide frequency band by several mechanisms is effected: First, the porous formation of the plate-shaped noise protection element 1 of plastics or components 2, 3 different porosity causes a sound absorption. Second, the provided slots 4, 5 contribute to the sound absorption. Thirdly, sound can pass through the slits 4, 5 and impinge on an object surface at an angle due to the spacers 7 and can be reflected by this on the back side of the second component 3 and finally absorbed there. Fourth, reflected sound begins at the back of the second component 3 in the recesses 8, which are preferably formed with different height or depth, as mentioned, so that sound of different frequencies is absorbed. Fifth, the noise protection element 1 and the noise protection mat due to the provided spacers 7 and plate-shaped training in sound also swing, which also contributes to a sound absorption.
  • the first component 2 can be manufactured, for example, with a thickness of 20 mm to 50 mm.
  • the second component 3 may conveniently be formed with a thickness of 5 mm to 20 mm.
  • the spacers 7 the longest possible design of the same is basically provided. The longer the spacers 7, the greater is an air cushion between an object surface and the back of the second component 3 and the better the sound gets caught between the object surface and the back side of the second component 3. Studies have shown, however, that if the spacers are too long 7 a stability of the attached noise protection element 1 decreases.
  • the spacers 7 have a height of about 5 mm to 25 mm.
  • the spacers 7 are preferably integrally formed with the second component 3 and are formed during their production.
  • the spacers 7 may be formed instead of the feet shown in the form of extending over the longitudinal or broad side strips so that sound between the lens surface and the back of the second component 3 is effectively caught. If several noise protection elements 1 are arranged side by side in a surface, it is sufficient that the peripheral noise protection elements 1 are formed on the outside with continuous strips.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Description

Die Erfindung betrifft ein Lärmschutzelement, wobei das Lärmschutzelement zumindest zwei aufeinanderliegende Komponenten aus Kunststoff umfasst, wobei eine erste Komponente eine größere Porosität als eine zweite Komponente aufweist, wobei die zweite Komponente aus einem verpressten Granulat aus Kunststoff gebildet ist.The invention relates to a noise protection element, wherein the noise protection element comprises at least two superimposed plastic components, wherein a first component has a greater porosity than a second component, wherein the second component is formed from a pressed granules of plastic.

Des Weiteren betrifft die Erfindung eine Verwendung mehrerer Lärmschutzelemente.Furthermore, the invention relates to a use of several noise protection elements.

Schließlich betrifft die Erfindung eine Verwendung von Altreifen.Finally, the invention relates to a use of used tires.

Gemäß dem Stand der Technik sind Lärmschutzwände bekannt geworden, die z. B. entlang von Autobahnen montiert sind bzw. werden, soweit diese durch bewohntes Gebiet verlaufen. So offenbart das Dokument DE 42 20 547 A1 ein Lärmschutzelement der eingangs genannten Art mit einem plattenförmigen Element hoher Festigkeit, auf welchem eine aus einem porösen Material bestehende Schicht als Schallabsorptionsmittel angeordnet ist. Bei den bekannten Lärmschutzwänden besteht ein Problem darin, dass diese oft nur schwierig oder überhaupt nicht nachgerüstet werden können. Darüber hinaus ist eine Montage sehr aufwendig und benötigt schweres Arbeitsgerät. Auch ein Abbau der bekannten Lärmschutzwände, der gegebenenfalls erforderlich sein kann, ist nur mit großem Aufwand möglich. Ein anderer Nachteil besteht darin, dass die bekannten Lärmschutzwände oft nur eine unbefriedigende Schallabsorption aufweisen und sehr hoch gebaut werden müssen. Selbst in diesem Fall kann aber eine Lärmbeeinträchtigung in bewohntem Gebiet nicht gänzlich ausgeschlossen werden, da im Bereich vom Autobahnen häufig Mittelbetonleitwände vorgesehen sind, welche ein Querschnittsprofil mit verbreitertem bzw. schrägem Endstück aufweisen, sodass von einer Mittelbetonleitwand Schall über die an sich hohen Lärmschutzwände reflektiert werden kann.According to the prior art noise barriers have become known, the z. B. are mounted along highways or are, as far as they pass through inhabited area. This is how the document reveals DE 42 20 547 A1 a noise protection element of the type mentioned above with a plate-shaped element of high strength, on which a layer consisting of a porous material is arranged as a sound absorbing means. One problem with the known noise barriers is that they can often only be retrofitted with difficulty or not at all. In addition, an assembly is very expensive and requires heavy equipment. A reduction of the known noise barriers, which may possibly be required, is possible only with great effort. Another disadvantage is that the known noise barriers often have only an unsatisfactory sound absorption and must be built very high. Even in this case, however, a noise impairment in inhabited area can not be completely ruled out, since in the area of highways often Mittelbetonleitwände are provided which have a cross-sectional profile with widened or oblique tail so that sound from a Mittelbetonleitwand be reflected on the per se high noise barriers can.

Hier setzt die Erfindung an. Aufgabe der Erfindung ist es, ein Lärmschutzelement anzugeben, das eine gute Schallabsorption aufweist, einfach montierbar und stabil ist, gleichzeitig eine gewisse Flexibilität aufweist und insbesondere auch für Mittelbetonleitwände einsetzbar ist, sodass diese bei Bedarf auch mit einem oder mehreren Lärmschutzelementen nachgerüstet werden können.This is where the invention starts. The object of the invention is to provide a noise protection element having a good sound absorption, easy to assemble and stable, at the same time has a certain flexibility and in particular for Mittelbetonleitwände can be used so that they can be retrofitted with one or more noise protection elements if necessary.

Diese Aufgabe wird durch ein Lärmschutzelement der eingangs genannten Art gelöst" bei welchem die erste Komponente aus einem verpressten faserförmigen Kunststoff gebildet ist.This object is achieved by a noise protection element of the type mentioned "in which the first component is formed from a compressed fibrous plastic.

Die mit der Erfindung erzielten Vorteile liegen insbesondere darin, dass durch die unterschiedlichen Porositäten der zwei Komponenten aus Kunststoff eine gezielte Schallabsorption erfolgt, da die beiden zumindest wenig luftdurchlässigen Komponenten Schall unterschiedlicher Frequenz absorbieren. Gleichzeitig dient die zweite Komponente, welche eine geringere Porosität und daher eine höhere Festigkeit aufweist, als Unterstützung für die erste Komponente. Eine Fertigung des Lärmschutzelementes aus Kunststoff ermöglicht es, dass dieses nicht nur grundsätzlich leichtgewichtig ausgebildet ist, sondern auch auf einfache Weise durch Kleben oder andere Befestigungsmethoden, beispielsweise Anschrauben, an beliebigen Gegenständen besonders einfach montierbar ist. Eine durchgehende Fertigung aus Kunststoffen mit bestimmten Porositäten verleiht dem Lärmschutzelement zudem eine gewisse Flexibilität, sodass dieses auch an Tunnelwänden oder anderen Stellen angeordnet werden kann, wo eine gekrümmte Auf- bzw. Anlagefläche gegeben ist. Ein erfindungsgemäßes Lärmschutzelement kann auch auf einfache Weise an einer Mittelbetonleitwand befestigt bzw. deren Form angepasst werden.The advantages achieved by the invention are, in particular, that targeted sound absorption is achieved by the different porosities of the two components made of plastic, since the two absorb at least slightly air-permeable components sound of different frequency. At the same time, the second component, which has a lower porosity and therefore higher strength, serves as support for the first component. A production of the noise protection element made of plastic makes it possible that this is not only basically lightweight, but also in a simple manner by gluing or other fastening methods, such as screwing on any objects is particularly easy to install. A continuous production of plastics with certain porosities also gives the noise protection element a certain flexibility, so that this can also be arranged on tunnel walls or other locations where a curved contact or contact surface is given. An inventive noise protection element can also be easily attached to a Mittelbetonleitwand or adapted to their shape.

Erfindungsgemäß ist vorgesehen, dass die erste Komponente aus einem verpressten faserförmigen Kunststoff, vorzugsweise mit einer durchschnittlichen Faserlänge von 2 mm bis 35 mm, und die zweite Komponente aus einem verpressten Granulat aus Kunststoff, vorzugsweise mit einer durchschnittlichen Granulatgröße von 1 mm bis 5 mm, gebildet ist. In diesem Fall treten die zuvor dargestellten Vorteile besonders deutlich zutage. Insbesondere sind in diesem Fall die Porositäten so gewählt, dass Schall sehr gut absorbiert wird und gleichzeitig die aus Granulat bestehende Komponente eine solche Festigkeit aufweist, dass diese die für sich alleine betrachtet wenig stabile Komponente aus verpresstem faserförmigen Kunststoff perfekt unterstützt und daher formstabil hält, und zwar auch dann, wenn das Lärmschutzelement gebogen befestigt wird.According to the invention it is provided that the first component of a compressed fibrous plastic, preferably with an average fiber length of 2 mm to 35 mm, and the second component of a compressed granules of plastic, preferably with an average granule size of 1 mm to 5 mm formed is. In this case, the advantages presented above are particularly evident. In particular, in this case, the porosities are chosen so that sound is absorbed very well and at the same time consisting of granules component has such a strength that it considers the inherently less stable component of compressed fibrous plastic perfectly supports and therefore keeps its shape, and although even if the noise protection element is mounted bent.

Bei der Herstellung des Lärmschutzelementes gemäß der Erfindung können die fertig erstellten Komponenten bei erhöhter Temperatur, z. B. mehr als 120 °C, miteinander verpresst werden. Ebenso ist es möglich, dass zuerst die erste Komponente erstellt wird, wonach auf die fertige erste Komponente das Granulat der zweiten Komponente aufgeschüttet und danach verpresst und gleichzeitig mit der ersten Komponente kontaktiert wird. Dabei kann hilfsweise zumindest einer der Kunststoffe auch mit einem Klebstoff verpresst werden. Möglich ist es auch, beide Komponenten in einem Schritt in einer einzigen Form durch Heißpressen zu erstellen.In the manufacture of the noise protection element according to the invention, the finished components can be produced at elevated temperature, for. B. more than 120 ° C, are pressed together. It is also possible that the first component is created first, after which the granulate of the second component is poured onto the finished first component and then compressed and simultaneously contacted with the first component. In the alternative, at least one of the plastics can also be used with one Adhesive be pressed. It is also possible to create both components in one single step by hot pressing.

Eine Schallabsorption kann noch weiter dadurch verbessert werden, indem die beiden Komponenten Schlitze aufweisen, wobei die Schlitze übereinander angeordnet sind. In dieser Ausführungsvariante kann Schall in die Platten eindringen und wird je nach Form der Schlitze auch in den Schlitzen bzw. den angrenzenden Bereichen der Komponenten absorbiert. Diesbezüglich ist es zweckmäßig, dass die in der ersten Komponente vorgesehenen Schlitze im Querschnitt zur zweiten Komponente hin verjüngt ausgebildet sind, damit möglichst viel zu absorbierender Schall in diese eintreten und absorbiert werden kann.A sound absorption can be further improved by the two components having slots, wherein the slots are arranged one above the other. In this embodiment, sound can penetrate into the plates and, depending on the shape of the slots, is also absorbed in the slots or adjacent areas of the components. In this regard, it is expedient that the slits provided in the first component are tapered in cross-section to the second component, so that as much sound as possible to be absorbed can enter and be absorbed therein.

In diesem Zusammenhang erweist es sich überdies als zweckmäßig, dass die Schlitze am Übergangsbereich von der ersten Komponente zur zweiten Komponente mit gleichem Querschnitt ausgebildet sind, sodass zu absorbierender Schall möglichst weit in das Lärmschutzelement eindringt, ehe dieser vom bzw. im Lärmschutzelement absorbiert wird. Dabei können die in der zweiten Komponente vorgesehenen Schlitze im Querschnitt rechteckig ausgebildet sein.In this context, it also proves to be expedient that the slots are formed at the transition region from the first component to the second component with the same cross section, so that sound to be absorbed penetrates as far as possible into the noise protection element, before it is absorbed by or in the noise protection element. In this case, the slots provided in the second component may be rectangular in cross-section.

Zweckmäßig ist es des Weiteren, dass mehrere parallele Reihen von Schlitzen vorgesehen sind, damit Schall möglichst gut absorbiert wird.It is also expedient that several parallel rows of slots are provided so that sound is absorbed as well as possible.

Um ein erfindungsgemäßes Lärmschutzelement bereitzustellen, das auch eine besonders hohe Flexibilität aufweist, kann vorgesehen sein, dass die Komponenten als Platten ausgebildet sind, die miteinander vorzugsweise durch Pressen bei erhöhter Temperatur verbunden sind. Die plattenförmige Ausbildung ermöglicht es, dass das Lärmschutzelement ohne Beschädigung gebogen und daher auch beispielsweise an gekrümmten Tunnelwänden befestigt werden kann.In order to provide an inventive noise protection element, which also has a particularly high flexibility, it can be provided that the components are formed as plates, which are preferably connected to each other by pressing at elevated temperature. The plate-shaped design makes it possible that the noise protection element bent without damage and therefore can also be attached, for example, to curved tunnel walls.

Vorzugsweise sind des Weiteren an der zweiten Komponente Abstandshalter angebracht. Dadurch kann Schall teilweise durch die Schlitze des Lärmschutzelementes treten, wird von einer Oberfläche, an welcher das Lärmschutzelement befestigt ist, reflektiert und trifft sodann auf eine Rückseite des Lärmschutzelementes, sodass Schall an der Rückseite der zweiten Komponente absorbiert wird. Dabei kann das Lärmschutzelement schwingen, was weiter zu einer effektiven Schallabsorption beiträgt.Preferably, spacers are further attached to the second component. As a result, sound can partially pass through the slits of the noise protection element, is reflected by a surface to which the noise protection element is attached, and then strikes a rear side of the noise protection element, so that sound at the back the second component is absorbed. In this case, the noise protection element can oscillate, which further contributes to an effective sound absorption.

Diesbezüglich kann es auch günstig sein, dass in der zweiten Komponente im Bereich zwischen den Schlitzen Vertiefungen vorgesehen sind, wobei die Vertiefungen vorzugsweise unterschiedlich tief sind. Die Vertiefungen sorgen dafür, dass Schall an der Rückseite des Lärmschutzelementes gleichsam gefangen wird, wobei, wenn Vertiefungen unterschiedlicher Tiefe vorgesehen sind, auch Schall verschiedener Frequenzen effektiv absorbiert werden kann.In this regard, it may also be favorable that recesses are provided in the region between the slots in the second component, wherein the recesses are preferably of different depths. The recesses ensure that sound is caught at the rear of the noise protection element as it were, and when wells of different depths are provided, also sound of different frequencies can be effectively absorbed.

Ein erfindungsgemäßes Lärmschutzelement kann grundsätzlich in allen Bereichen eingesetzt werden, wo großer Lärm auftritt, findet jedoch bevorzugt Anwendung entlang von Straßen oder Bahnstrecken, beispielsweise bei Mittelbetonleitwänden von Schnellstraßen oder Autobahnen.An inventive noise protection element can basically be used in all areas where high noise occurs, but is preferably applied along roads or railways, for example in Mittelbetonleitwänden of highways or highways.

Beim Herstellen eines erfindungsgemäßen Lärmschutzelementes können grundsätzlich auch neuwertige Grundstoffe eingesetzt werden. Bevorzugt ist es jedoch, dass Altreifen zum Herstellen eines erfindungsgemäßen Lärmschutzelementes verwendet werden. Die Altreifen, das sind nicht mehr zu gebrauchende bzw. gebrauchte Reifen von insbesondere Kraftfahrzeugen, können durch geeignete Maschinen in eine Faser- bzw. Granulatform gebracht werden, was zum Stand der Technik zählt.When producing a noise protection element according to the invention basically new materials can be used. However, it is preferred that used tires for producing a noise protection element according to the invention are used. The tires, which are no longer used or used tires of particular motor vehicles, can be brought by suitable machines in a fiber or granular form, which is state of the art.

Weitere Merkmale, Vorteile und Wirkungen der Erfindung ergeben sich aus dem nachfolgend dargestellten Ausführungsbeispiel, anhand dessen die Erfindung noch näher erläutert ist. In der anliegenden Zeichnung, auf welche dabei Bezug genommen ist, zeigen:

  • Fig. 1 ein erfindungsgemäßes Lärmschutzelement;
  • Fig. 2 ein Lärmschutzelement gemäß Fig. 1 in einer seitlichen Ansicht;
  • Fig. 3 einen Schnitt entlang der Linie III-III in Fig. 1;
  • Fig. 4 ein erfindungsgemäßes Lärmschutzelement in stirnseitiger Ansicht;
  • Fig. 5 einen Schnitt entlang der Linie V-V in Fig. 1.
Further features, advantages and effects of the invention will become apparent from the embodiment illustrated below, by which the invention is explained in more detail. In the accompanying drawing, to which reference is made, show:
  • Fig. 1 an inventive noise protection element;
  • Fig. 2 a noise protection element according to Fig. 1 in a side view;
  • Fig. 3 a section along the line III-III in Fig. 1 ;
  • Fig. 4 an inventive noise protection element in frontal view;
  • Fig. 5 a section along the line VV in Fig. 1 ,

In Fig. 1 bis Fig. 5 ist ein erfindungsgemäßes Lärmschutzelement 1 in einer möglichen Ausführungsvariante dargestellt. Das Lärmschutzelement 1 umfasst eine erste Komponente 2 aus einem Kunststoff sowie eine zweite Komponente 3, die ebenfalls aus einem Kunststoff gebildet ist. Die beiden Komponenten 2, 3 sind aufeinanderliegend angeordnet und beispielsweise durch Pressen bei hoher Temperatur und/oder hohem Druck miteinander unmittelbar verbunden, ohne dass weitere Elemente für eine Verbindung der Komponenten 2, 3 vorgesehen sind. Sowohl die erste Komponente 2 als auch die zweite Komponente 3 sind aus verpressten Kunststoffteilchen kleiner Größe gebildet. Dabei besteht die erste Komponente 2 aus einem faserförmigen Kunststoff, der aus Kunststofffasern mit einer durchschnittlichen Länge von 2 mm bis 35 mm, bevorzugt 5 mm bis 25 mm, gebildet ist. Die einzelnen Fasern, die vorzugsweise durch Zerkleinerung von Altreifen gewonnen werden, sind dabei miteinander verpresst, wobei hilfsweise zur besseren Bindung der Fasern auch ein Klebstoff eingesetzt werden kann. Aufgrund der faserförmigen Struktur des Kunststoffes bzw. der Kunststoffteilchen wird beim Pressen der ersten Komponente 2 ein poröser Formkörper erhalten. Die zweite Komponente 3 wird ebenfalls aus einem Kunststoff hergestellt, und zwar aus einem Granulat aus Kunststoff, welches ebenfalls durch Zerkleinerung aus Altreifen gewonnen werden kann. Bei der Herstellung der zweiten Komponente 3 wird das Granulat aus Kunststoff wie die Fasern bei der Herstellung der ersten Komponente 2 verpresst, wobei auch ein Klebstoff zur besseren Bindung beigemengt werden kann. Ebenso wie die erste Komponente 2 ist die zweite Komponente 3 porös. Allerdings ergibt sich aufgrund des Einsatzes von Granulat bei der Herstellung der zweiten Komponente 3 eine höhere Dichte bzw. geringere Porosität derselben, da das Granulat dichter packt. Dies führt auch dazu, dass die zweite Komponente 3 stabiler als die erste Komponente 2 ist, mit dem Nebeneffekt, dass die zweite Komponente 3 als Träger für die für sich alleine wenig stabile erste Komponente 2 dient.In Fig. 1 to Fig. 5 an inventive noise protection element 1 is shown in a possible embodiment. The noise protection element 1 comprises a first component 2 made of a plastic and a second component 3, which is also formed from a plastic. The two components 2, 3 are arranged one above the other and directly connected to each other, for example by pressing at high temperature and / or high pressure, without further elements for a connection of the components 2, 3 are provided. Both the first component 2 and the second component 3 are formed from compressed plastic particles of small size. In this case, the first component 2 consists of a fibrous plastic, which is formed of plastic fibers having an average length of 2 mm to 35 mm, preferably 5 mm to 25 mm. The individual fibers, which are preferably obtained by crushing waste tires, are pressed together, wherein, alternatively, an adhesive can be used to better bond the fibers. Due to the fibrous structure of the plastic or the plastic particles, a porous shaped body is obtained during pressing of the first component 2. The second component 3 is also made of a plastic, namely a granules of plastic, which can also be obtained by crushing waste tires. In the production of the second component 3, the granules of plastic as the fibers in the production of the first component 2 is pressed, whereby an adhesive can be added for better bonding. Like the first component 2, the second component 3 is porous. However, due to the use of granules in the production of the second component 3, a higher density or lower porosity of the same results because the granules packs more tightly. This also leads to the second component 3 being more stable than the first component 2, with the secondary effect that the second component 3 serves as a carrier for the first component 2 which is less stable on its own.

Die für die erste Komponente 2 eingesetzten Fasern sowie das für die zweite Komponente 3 eingesetzte Granulat werden hinsichtlich einer Größe der Kunststoffteilchen so gewählt, dass das Lärmschutzelement 1 insgesamt eine hinreichende Stabilität aufweist, aber dennoch biegsam ist. Auch aus diesem Grund ist eine durchschnittliche Faserlänge eines für die Herstellung der ersten Komponente 2 eingesetzten Kunststoffes vorzugsweise in einem Bereich von 2 mm bis 35 mm gewählt. Bei größeren Faserlängen besteht die Gefahr, dass die erste Komponente 2 zu wenig stabil ist. Geringere Faserlängen als 2 mm führen hingegen zu einer unter Umständen zu geringen Porosität. Aus ähnlichen Gründen ist eine durchschnittliche Granulatgröße für das Granulat aus Kunststoff zur Herstellung der zweiten Komponente 3 bevorzugt auf 1 mm bis 5 mm begrenzt. In diesem Bereich ist ein Optimum aus Stabilität der zweiten Komponente 3, die wie erwähnt auch als Träger für die erste Komponente 2 dient, und einer Porosität gegeben.The fibers used for the first component 2 as well as the granules used for the second component 3 are chosen with regard to a size of the plastic particles so that the noise protection element 1 overall has a sufficient stability, but is still flexible. Also for this reason, an average fiber length of a plastic used for the production of the first component 2 is preferably selected in a range of 2 mm to 35 mm. For larger fiber lengths there is a risk that the first component 2 too little is stable. On the other hand, shorter fiber lengths than 2 mm lead to a possibly too low porosity. For similar reasons, an average granule size for the granules of plastic for producing the second component 3 is preferably limited to 1 mm to 5 mm. In this area, there is an optimum of stability of the second component 3, which as mentioned also serves as a carrier for the first component 2, and a porosity.

Wegen der unterschiedlichen Porositäten der Komponenten 2, 3 absorbieren diese Schall unterschiedlicher Frequenzen, sodass bereits aufgrund dieser Ausgestaltung eine gute Schallabsorption gegeben ist.Because of the different porosities of the components 2, 3, these absorb sound of different frequencies, so that a good sound absorption is already given due to this configuration.

Im Einsatz wird das Lärmschutzelement 1 beispielsweise an einer Mittelbetonleitwand einer Autobahn so befestigt, dass die erste Komponente 2 einem Fahrstreifen zugewandt ist, während die zweite Komponente 3, gegebenenfalls im Bereich von Abstandshaltern 7, an eine Oberfläche eines Objektes geklebt ist. Wenn, wie insbesondere aus Fig. 1 und Fig. 5 ersichtlich ist, das Lärmschutzelement 1 zusätzlich mit Schlitzen 4, 5 ausgebildet ist, kann Schall auch durch die Schlitze 4, 5 absorbiert werden. Dabei sind die Schlitze 4 in der ersten Komponente 2 im Querschnitt zum Fahrstreifen hin etwa mit einem trichterförmigen Querschnitt ausgebildet. Dadurch wird auftreffendem Schall eine relativ große Oberfläche geboten, sodass dieser grundsätzlich auch an den die Schlitze 4 definierenden Bereichen der ersten Komponente 2 absorbiert werden kann. Sobald Schall durch die Schlitze 4 hindurchtritt, trifft dieser in der Folge auf die Schlitze 5, die im Übergangsbereich 6 zwischen erster Komponente 2 und zweiter Komponente 3 mit gleichem Querschnitt wie die Schlitze 4 ausgebildet sind. Passiert Schall die Schlitze 5, so trifft der Schall auf eine Oberfläche eines Objektes, auf bzw. an welchem das Lärmschutzelement 1 befestigt ist, und wird von dieser Oberfläche auf die Rückseite der zweiten Komponente 3 reflektiert, wobei der Schall aufgrund der porösen Ausbildung der zweiten Komponente 3 von dieser absorbiert wird. Ist das Lärmschutzelement 1 wie bereits erwähnt mit Abstandshaltern 7 auf bzw. an einer Oberfläche angeordnet, so kann das Lärmschutzelement 1 bei Schallbeaufschlagung auch in Schwingungen geraten, was zusätzlich zur Absorption von Schall beiträgt. Darüber hinaus können zusätzlich in der zweiten Komponente 3 Vertiefungen 8 vorgesehen sein, welche in jenen Bereichen liegen, welche schlitzfreien Bereichen 9 der ersten Komponente 2 entsprechen. In diesen Vertiefungen 8 verfängt sich reflektierter Schall, sodass dadurch eine weitere Steigerung der Effektivität der Schallabsorption möglich ist. Dabei sind die Vertiefungen 8 vorzugsweise mit unterschiedlicher Tiefe ausgebildet, damit Schall unterschiedlicher Frequenzen gut absorbiert wird.In use, the noise protection element 1 is fastened, for example, to a middle concrete guide wall of a highway so that the first component 2 faces a lane, while the second component 3, optionally in the region of spacers 7, is glued to a surface of an object. If, as in particular Fig. 1 and Fig. 5 it can be seen, the noise protection element 1 is additionally formed with slots 4, 5, sound can also be absorbed through the slots 4, 5. The slots 4 are formed in the first component 2 in cross section to the lane out approximately with a funnel-shaped cross-section. As a result, incident sound is offered a relatively large surface, so that it can basically also be absorbed at the regions of the first component 2 defining the slots 4. As soon as sound passes through the slits 4, it strikes the slots 5 in the sequence which are formed in the transition region 6 between the first component 2 and the second component 3 with the same cross-section as the slits 4. If sound passes through the slots 5, the sound strikes a surface of an object on which the noise protection element 1 is attached, and is reflected from this surface to the back of the second component 3, wherein the sound due to the porous formation of the second Component 3 is absorbed by this. If the noise protection element 1, as already mentioned, is arranged with spacers 7 on or on a surface, then the noise protection element 1 may also vibrate when sound is applied, which additionally contributes to the absorption of sound. In addition, 3 recesses 8 may additionally be provided in the second component, which lie in those areas which correspond slot-free areas 9 of the first component 2. Reflected sound catches in these recesses 8, thereby increasing further the effectiveness of sound absorption is possible. The recesses 8 are preferably formed with different depths, so that sound of different frequencies is well absorbed.

Bei dem in Fig. 1 bis Fig. 5 dargestellten Lärmschutzelement 1 bzw. alternativen Ausführungsvarianten wird eine wirksame Schallabsorption in einem breiten Frequenzband durch mehrere Mechanismen bewirkt: Zum Ersten bewirkt die poröse Ausbildung des plattenförmigen Lärmschutzelementes 1 aus Kunststoffen bzw. Komponenten 2, 3 verschiedener Porosität eine Schallabsorption. Zum Zweiten tragen die vorgesehenen Schlitze 4, 5 zur Schallabsorption bei. Zum Dritten kann Schall durch die Schlitze 4, 5 durchtreten und aufgrund der Abstandshalter 7 in einem Winkel auf eine Objektoberfläche treffen sowie von dieser auf die Rückseite der zweiten Komponente 3 reflektiert und dort schließlich absorbiert werden. Zum Vierten fängt sich reflektierter Schall an der Rückseite der zweiten Komponente 3 in den Vertiefungen 8, die wie erwähnt vorzugsweise mit unterschiedlicher Höhe bzw. Tiefe ausgebildet sind, damit Schall unterschiedlicher Frequenzen absorbiert wird. Zum Fünften kann das Lärmschutzelement 1 bzw. die Lärmschutzmatte aufgrund der vorgesehenen Abstandshalter 7 und plattenförmigen Ausbildung bei Schallbeaufschlagung auch schwingen, was ebenfalls zu einer Schallabsorption beiträgt.At the in Fig. 1 to Fig. 5 an effective sound absorption in a wide frequency band by several mechanisms is effected: First, the porous formation of the plate-shaped noise protection element 1 of plastics or components 2, 3 different porosity causes a sound absorption. Second, the provided slots 4, 5 contribute to the sound absorption. Thirdly, sound can pass through the slits 4, 5 and impinge on an object surface at an angle due to the spacers 7 and can be reflected by this on the back side of the second component 3 and finally absorbed there. Fourth, reflected sound begins at the back of the second component 3 in the recesses 8, which are preferably formed with different height or depth, as mentioned, so that sound of different frequencies is absorbed. Fifth, the noise protection element 1 and the noise protection mat due to the provided spacers 7 and plate-shaped training in sound also swing, which also contributes to a sound absorption.

Das in Fig. 1 bis Fig. 5 dargestellte Lärmschutzelement 1 soll insbesondere für eine Befestigung desselben auf gekrümmten Auflageflächen eine gewisse Flexibilität aufweisen. Hierfür kann die erste Komponente 2 beispielsweise mit einer Stärke von 20 mm bis 50 mm gefertigt sein. Die zweite Komponente 3 kann zweckmäßigerweise mit einer Stärke von 5 mm bis 20 mm ausgebildet sein. Hinsichtlich der Abstandshalter 7 ist grundsätzlich eine möglichst lange Ausbildung derselben vorgesehen. Je länger die Abstandshalter 7, desto größer ist ein Luftpolster zwischen einer Objektoberfläche und der Rückseite der zweiten Komponente 3 und umso besser verfängt sich Schall zwischen der Objektoberfläche und der Rückseite der zweiten Komponente 3. Untersuchungen haben jedoch gezeigt, dass bei allzu langer Ausbildung der Abstandshalter 7 eine Stabilität des befestigten Lärmschutzelementes 1 abnimmt. Aus praktischen Gründen ist es daher bevorzugt, dass die Abstandshalter 7 eine Höhe von etwa 5 mm bis 25 mm aufweisen. Die Abstandshalter 7 sind dabei bevorzugt mit der zweiten Komponente 3 integral ausgebildet und werden bei deren Herstellung angeformt. Die Abstandshalter 7 können anstelle der dargestellten Füßchen auch in Form von über die Längs- bzw. Breitseite verlaufenden Leisten ausgebildet sein, damit Schall zwischen der Objektivoberfläche und der Rückseite der zweiten Komponente 3 wirksam gefangen wird. Sofern mehrere Lärmschutzelemente 1 in einer Fläche nebeneinander angeordnet werden, ist es ausreichend, dass die umfangsseitigen Lärmschutzelemente 1 außenseitig mit durchgängigen Leisten ausgebildet sind.This in Fig. 1 to Fig. 5 illustrated noise protection element 1 should have a certain flexibility in particular for fixing the same on curved bearing surfaces. For this purpose, the first component 2 can be manufactured, for example, with a thickness of 20 mm to 50 mm. The second component 3 may conveniently be formed with a thickness of 5 mm to 20 mm. With regard to the spacers 7, the longest possible design of the same is basically provided. The longer the spacers 7, the greater is an air cushion between an object surface and the back of the second component 3 and the better the sound gets caught between the object surface and the back side of the second component 3. Studies have shown, however, that if the spacers are too long 7 a stability of the attached noise protection element 1 decreases. For practical reasons, it is therefore preferred that the spacers 7 have a height of about 5 mm to 25 mm. The spacers 7 are preferably integrally formed with the second component 3 and are formed during their production. The spacers 7 may be formed instead of the feet shown in the form of extending over the longitudinal or broad side strips so that sound between the lens surface and the back of the second component 3 is effectively caught. If several noise protection elements 1 are arranged side by side in a surface, it is sufficient that the peripheral noise protection elements 1 are formed on the outside with continuous strips.

Claims (14)

  1. Noise protection element (1), wherein the noise protection element (1) comprises at least two components (2, 3) made of plastic, which lie one on top of the other, wherein a first component (2) has a greater porosity that a second component (3), wherein the second component (3) is formed from a pressed granular material made of plastic, characterized in that the first component (2) is formed from a pressed fibrous plastic.
  2. The noise protection element (1) according to claim 1, characterized in that the first component (2) is formed from a pressed fibrous plastic having an average fibre length of 2 mm to 35 mm and the second component (3) is formed from a pressed granular material made of plastic having an average granular material size of 1 mm to 5 mm.
  3. The noise protection element (1) according to claim 2, characterized in that at least one of the plastics is pressed with an adhesive.
  4. The noise protection element (1) according to claim 2 or 3, characterized in that the two components (2, 3) have slots (4, 5), wherein the slots (4, 5) are arranged above one another.
  5. The noise protection element (1) according to claim 4, characterized in that the slots (4) provided in the first component (2) are configured to taper in cross-section towards the second component (3).
  6. The noise protection element (1) according to claim 5, characterized in that the slots (4, 5) at the transition region (6) from the first component (2) to the second component (3) are formed with the same cross-section.
  7. The noise protection element (1) according to claim 6, characterized in that the slots (5) provided in the second component (3) are configured to be rectangular in cross-section.
  8. The noise protection element (1) according to any one of claims 4 to 7, characterized in that a plurality of parallel rows of slots (4, 5) are provided.
  9. The noise protection element (1) according to any one of claims 1 to 8, characterized in that the components (2, 3) are configured as plates which are preferably connected to one another by pressing at elevated temperature.
  10. The noise protection element (1) according to any one of claims 1 to 9, characterized in that spacers (7) are attached to the second component (3).
  11. The noise protection element (1) according to claim 10, characterized in that recesses (8) are provided in the second component (3) in the region between the slots (5).
  12. The noise protection element (1) according to claim 11, characterized in that the recesses (8) have various depths.
  13. Use of a plurality of noise protection elements (1) according to any one of claims 1 to 12 along roads or railway tracks.
  14. Use of old tyres to produce a noise protection element (1) according to any one of claims 1 to 12.
EP09165702.3A 2008-07-18 2009-07-16 Noise protection element Not-in-force EP2146005B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT11182008A AT507116B1 (en) 2008-07-18 2008-07-18 NOISE ELEMENT

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EP2146005A2 EP2146005A2 (en) 2010-01-20
EP2146005A3 EP2146005A3 (en) 2014-01-01
EP2146005B1 true EP2146005B1 (en) 2015-07-08

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EP09165702.3A Not-in-force EP2146005B1 (en) 2008-07-18 2009-07-16 Noise protection element

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EP (1) EP2146005B1 (en)
AT (1) AT507116B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT509717B1 (en) 2010-12-23 2011-11-15 Big Bau Und Immobilienges M B H NOISE ELEMENT
CN105544418A (en) * 2016-02-03 2016-05-04 江阴市人人达科技有限公司 Efficient sound-absorption sound-proof wall used for metro or light rail
CN106758900B (en) * 2016-12-27 2022-05-13 中国铁道科学研究院节能环保劳卫研究所 Damping system of damping type railway metal sound barrier

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52148917A (en) * 1976-06-03 1977-12-10 Chiyoda Chem Eng Construct Co Sound adsorbing material
SE402142B (en) * 1976-06-03 1978-06-19 Becker Wilhelm Ab LAMINATED SOUND ABSORBENT
CH684279A5 (en) * 1991-07-05 1994-08-15 Umb Trading Ltd A noise protection element for noise barriers.

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EP2146005A3 (en) 2014-01-01
EP2146005A2 (en) 2010-01-20
AT507116B1 (en) 2010-09-15
AT507116A1 (en) 2010-02-15

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