EP0679765B1 - Sound-proofing element and method for the production of a sound-proofing element - Google Patents

Sound-proofing element and method for the production of a sound-proofing element Download PDF

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Publication number
EP0679765B1
EP0679765B1 EP95104051A EP95104051A EP0679765B1 EP 0679765 B1 EP0679765 B1 EP 0679765B1 EP 95104051 A EP95104051 A EP 95104051A EP 95104051 A EP95104051 A EP 95104051A EP 0679765 B1 EP0679765 B1 EP 0679765B1
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EP
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Prior art keywords
sound
absorption layer
insulation layer
sound absorption
layer
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EP95104051A
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German (de)
French (fr)
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EP0679765A1 (en
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Kurt Dr. Bitterli
Remo Bossert
Dieter Ludwig
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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
    • E01F8/0029—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 soundproofing element for soundproof walls, consisting of a sound insulation layer and at least one on one of the sides of the soundproofing layer located sound absorption layer, the Sound insulation layer and the sound absorption layer elastomer, Contain rubber and / or plastic granulate from recycled material.
  • the invention further relates to a method for manufacturing of such a soundproofing element.
  • Such soundproofing elements are usually stacked on top of one another on soundproofing segments and their rows assembled into long soundproof walls.
  • the spatial The soundproofing elements are fixed in that this between firmly anchored in the ground and in a predetermined Distance between columns or other substructures be inserted.
  • Soundproofing elements on existing components such as buildings or To fasten structures.
  • noise barriers which, for example, along railway lines, highways or set up alongside industrial facilities, can reduce the noise emissions from traffic or industrial facilities be significantly reduced so that nearby residential areas be effectively protected against disturbing noise emissions.
  • the soundproofing elements used for this must, however meet a wide variety of requirements, from acoustic and optical requirements up to fire protection Demands are enough.
  • the soundproofing elements mechanically particularly stable and high stability have, since these come as close as possible to the sound source have to be and thus possibly quite significant Differences in pressure act on this, such as this the case when a train passes by is.
  • the soundproofing elements have to be extremely stable have to be applied loads by pressure or impact, such as when a vehicle collides the case may be undamaged or largely survive without damage.
  • the noise protection element consists of a plate-shaped element made of plastic and / or elastomer granulate, which under high pressure and with addition a binder has been molded. On a flat side this plate-shaped element is resistant to aging and in particular UV-resistant protective layer applied, their composition similar to that of the plate-shaped element is.
  • This protective layer serves on the one hand to ensure that underlying plate-shaped element against environmental influences to protect and on the other hand to the back of the To give the noise protection element a pleasing appearance, by being colored and / or with any profiling is provided.
  • a layer of an elastomer and / or plastic granulate, which is bound with a binder and only with little Pressure is compression molded. Due to the low pressure this layer receives a porous structure which the desired Has sound absorption properties. These properties can be further improved if the gap between the plate-shaped element and the sound absorption layer is filled with a fiber material.
  • Noise protection walls can be made with such noise protection elements build up, the acoustic properties of the can be adapted to the respective application.
  • these noise protection elements are complicated Own structure and therefore expensive to manufacture are. Additional measures must also be taken to implement the required fire safety, which further increase manufacturing costs.
  • the mechanical stability limited, so these noise control elements damaged by high pressure waves can be.
  • the invention is therefore based on the object, an easy Soundproofing element to be handled and a method for producing it to create the same for soundproof walls is simple and cheap to manufacture, as low a weight as possible has a high mechanical strength, as well as good fire safety.
  • the object underlying the invention is in one Soundproofing element of the type mentioned above solved that the soundproofing layer as a heterogeneous solid with anisotropic mechanical properties with the addition of a mineral, plastic-coated and hydraulically setting Binder is formed that the sound absorption layer an organic binder from a lower density flame retardant polyurethane or chlorosulfonated Polyethylene is added and that the sound insulation layer and the sound absorption layer merge into one another.
  • the soundproofing element according to the invention is particularly simple built up, has a low weight and is in its Manufacture particularly cheap, because on the one hand preferably recycling materials are used and on the other hand its Manufacturing can be done in one operation. It can do that done that the individual layers one after the other filled without pressure into a corresponding form and subsequently be cured.
  • This is the soundproofing element according to the invention for the production of inexpensive soundproof walls particularly well suited.
  • one is very good sound insulation and sound absorption, where the sound absorption by changing the structure and the Mixing ratios adapted to the respective requirements can be.
  • this soundproofing element is however in its very good mechanical properties and its comparatively light weight to see what makes it it is possible to manufacture particularly low soundproof walls, as well as high soundproof walls thanks to cassette-like Stacking and lining up the soundproofing elements to realize.
  • the sound absorption layer suitably consists of a mixture largely from recycled plastic granulate and a second organic solid phase, preferably from irregular shaped fragments of porous lava clay.
  • this is heterogeneous Mixture of the sound insulation layer and the mixture of the sound absorption layer mixed in any mixing ratio, the sound insulation layer continuously into the Sound absorption layer passes over.
  • the soundproofing element is particularly favorable mechanical Receives properties, while at the same time another improvement the sound absorption properties is achieved.
  • the density of the sound absorption layer should be set Condition advantageously less than 1.1 and the density of the soundproofing layer in the set state be greater than 1.1. This makes particularly good sound absorption and sound insulation values reached.
  • a special embodiment of the invention is within the sound absorption layer and / or the sound insulation layer reinforcement to increase the mechanical stability Reinforcing iron or reinforcing nets sandwiched in two or more levels arranged.
  • This reinforcement can be used at the same time inserting the individual layers into the mold will. Because this reinforcement is on all sides of the material of the individual layers is created after curing the soundproofing element is a particularly firm sandwich-like Composite.
  • the sound absorption layer on their the sound source facing side is provided with a surface structure, those made of one piece and running lengthways or crossways Ribs or depressions may exist that are trapezoidal or have a wavy cross-sectional shape. It is also possible, integrally molded, regularly distributed projections or to provide recesses which are conical, truncated cone, pyramidal or prismatic cross-sectional structure exhibit. Because of the enlargement of the surface becomes a significant enhancement of the sound absorption effect reached.
  • the sound absorption layer can contain chemical additives to prevent flammability.
  • suitable combustible additives are also hydroxides or carbonates, for example aluminum hydroxide (Al (OH) 3 ) or halogen-containing hydrocarbons or phosphoric acid ethers. It is also possible to use granules which are difficult to combust, as is the case, for example, when recycling cables or conveyor belts.
  • the object underlying the invention will continue through a process for the manufacture of soundproofing elements for soundproof walls, consisting of a load-bearing soundproofing layer and one on one of the sides of the soundproofing layer located sound absorption layer, thereby loosened, that a first evenly mixed mixture of a flame retardant polyurethane and / or a flame-retardant binder based on chlorosol-treated Polyethylene with an elastomer and / or plastic granulate from recycled material, the sound absorption layer forming, is filled without pressure into a mold.
  • the setting of the first mixture becomes a second mixture greater density from a plastic-bonded elastomer and / or Plastic granules made from recycled material and one mineral hardened and hydraulically setting Binder, forming the soundproofing layer, into the Form filled.
  • the setting process of the first and the second Layer occurs essentially at the same time under a light layer Pressure increase.
  • the soundproofing element according to the invention can thus be used low effort and therefore cheap to manufacture. Through the in essential simultaneous setting of the sound insulation layer and the soundproofing layer becomes a particularly solid one-piece Verbund reached.
  • the shape before setting the first and the second mixture closed with a lid and before the two mixtures have set by 180 ° turned. In this way, a targeted minor Reach pressure increase, the sound absorption layer is not compressed unnecessarily, as is done by the uncontrolled Penetration of the hydraulically setting binder the second mixture into the first mixture could.
  • the first mixture can be mixed with a difficultly flammable granulate, preferably from cable or conveyor belt waste and / or Al (OH) 3 , halogen-containing hydrocarbons or phosphoric acid esters.
  • a Soundproofing element 1 produced according to the invention is shown, which consists of a sound insulation layer 2 and a solid with this connected sound absorption layer 3.
  • a protective layer not shown be provided on the opposite side of the sound absorption layer 3
  • the sound insulation layer 2 and the sound absorption layer 3 from a uniform mixed elastomer and / or plastic granulate, the sound insulation layer 2 with the addition of a mineral, Plastic-coated hydraulically setting binder, for example cement, to form a firm bond with heterogeneous structure is cured.
  • the sound insulation layer 2 is a mixture of gravel and sand to mix.
  • the density of the soundproofing layer 2 should be greater than 1.1 and the Density of the sound absorption layer 3 should be less than 1.1.
  • the density can be easily changed by changing the Set the mixing ratio.
  • the Sound absorption layer 3 additionally irregularly shaped Fragments of lavabone contain so that a special good sound absorption effect is achieved.
  • This mixture gives very good sound absorption properties achieved, including the fire protection requirements can be fulfilled very easily by chemical Additives against flammability and / or flame-retardant granules, for example from cable or conveyor belt waste or recycling material can be obtained.
  • PU binders that are difficult to burn can be used be used.
  • Reinforcement 4 made of reinforcement bars or reinforcement nets, also Glass, glass fiber materials or plastics for use can come out sandwiched in two or more levels are arranged one above the other.
  • the multi-layered reinforcements 4 can also have different distances from each other exhibit.
  • This reinforcement 4 is a significant improvement in achieved mechanical stability of the soundproofing element 1, it is of course possible, also in the soundproofing layer 2 provide a reinforcement 4.
  • the sound absorption layer 3 has a surface structure provided with molded in one piece and provided with longitudinal or transverse ribs 5 or depressions which is a trapezoidal or wavy surface structure form and on the facing the sound source Are arranged outside.
  • ribs 5 can also be integrally attached to the sound absorption layer 3 molded on or molded in, regularly distributed projections or depressions with a cross-section more conical, truncated cone, pyramid or prism shaped Shape can be provided. For visual reasons, it is advisable if the height of all the ribs 5 or protrusions are the same is, or groups of ribs or protrusions of equal heights exhibit. The same applies to deepening.
  • ribs 5 stand up the full-area sound absorption layer 3, which is a strength of about 25 mm and are integrally connected to this. Since both the sound absorption layer 3 and the from this projecting ribs 5 have a porous structure, through the use of specially blended Granules are made from recycled rubber or plastic in conjunction with the voids between each Grains of the granulate have particularly good sound absorption properties reached.
  • the grain shape of the granules can be round, be angular or varied.
  • the size of the cavities should add up to about 50% by volume, with the cavities mostly by the manufacturing process to be described are contiguous.
  • the individual granules of the granulate are separated by an organic one Binder based on, for example, polyurethane or chlorosulfonated polyetylene to form an elastic body connected with each other. Gluing the granules takes place under low pressure and at normal temperature or at a slightly elevated temperature.
  • the sound insulation layer 3 is at the same time in static Sensible part of the soundproofing element 1, the Thickness of this layer depends on the static requirements. As a rule, the sound insulation layer 3 should have a thickness about 80 - 100 mm.
  • the production of the soundproofing elements 1 is particularly simple and can be done in a few work steps. This is first a first mixture of an evenly mixed, flame-retardant PU, or a difficult flammable binder based on chlorosulfonated Polyethylene and elastomer and / or plastic granulate from recycled material to fill without pressure into a mold in order to Produce sound absorption layer 3.
  • the sound absorption layer is always on the side of the soundproofing element on which the noise emission occurs, for example from motor vehicles, the sound absorption layer should be particularly difficult to combust.
  • This can be achieved by additionally adding a granulate made from a flame-retardant material, such as cable or conveyor belt waste, to this first mixture.
  • a flame-retardant material such as cable or conveyor belt waste
  • Al (OH) 3 halogen-containing hydrocarbons or phosphoric acid esters can also be added.
  • a second mixture becomes larger Density, the sound insulation layer 2 made of a plastic-bound Elastomer and / or plastic granulate made from recycled material with an admixture of mineral, hydraulically setting Binding agents filled into the mold without pressure.
  • the filling this layer of higher density is briefly interrupted, to insert the reinforcement in the desired levels 4 to enable.
  • After filling the first and the The second mixture is the mold with an appropriate lid locked. A subsequent rotation of the mold by 180 ° can be advantageous because it prevents the penetration of mineral Avoid binders in the sound absorption layer is, which negatively affects the sound absorption ability could be.
  • the shape also additionally heated and / or steam blown into the mold will. It is also possible to cure under to apply light pressure. To do this, it is sufficient to include the shape a suitable closure or cover and this easy to press into the mold. By curing at the same time the sound insulation layer 2 and the sound absorption layer 3 under slight pressure is at the interface between the two Layers achieved a good connection. For this it is advisable if the shape has sufficient inherent rigidity, so that the hydrostatic occurring during pressing Press these can not bend.
  • the sound absorption layer 3 and the sound insulation layer 2 can also be prepared in such a way that the mixing ratios during the first and second layers the filling in the form are continuously changed.
  • a soundproofing element 1 can thus be produced at a smooth transition from the sound absorption layer 3 is given in the sound insulation layer 2.
  • the soundproofing element 1 produced according to the invention is special easy and inexpensive to manufacture and has one comparatively low weight a very good mechanical Stability on.
  • a particular advantage of this solution is also to see that mainly recycling or waste materials used to manufacture the soundproofing element 1 can be, so that because of the enormous attack this Materials is shown a meaningful utilization.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Stringed Musical Instruments (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

The sound-absorption layer (3) which is placed on one of the sides of the sound-proofing layer (2) has a high proportion of elastomer, rubber and/or plastics granular recycling material. The sound- absorption layer (3) is connected integral with the sound-proofing layer (2) and has a lesser density than same. The sound-proofing layer (2) can be a heterogeneous multi-phase solid body with anisotropic mechanical properties made from recycled plastics granules, inorganic additives and a hydraulic bonding agent. The sound- absorption layer preferably has on its outer side facing the sound source integral moulded longitudinal or transversely aligned ribs (5) with trapezoidal or undulating cross-section. The bonding and setting process can be carried out at high temperature using steam for faster manufacture. <IMAGE>

Description

Die Erfindung betrifft ein Schallschutzelement für Schallschutzwände, bestehend aus einer tragfähigen Schalldämmschicht und wenigstens einer auf einer der Seiten der Schalldämmschicht befindlichen Schallabsorptionsschicht, wobei die Schalldämmschicht und die Schallabsorptionsschicht Elastomer-, Gummi- und/oder Kunststoffgranulat aus Recyclingmaterial enthalten. Die Erfindung betrifft ferner ein Verfahren zum Herstellen eines solchen Schallschutzelementes.The invention relates to a soundproofing element for soundproof walls, consisting of a sound insulation layer and at least one on one of the sides of the soundproofing layer located sound absorption layer, the Sound insulation layer and the sound absorption layer elastomer, Contain rubber and / or plastic granulate from recycled material. The invention further relates to a method for manufacturing of such a soundproofing element.

Solche Schallschutzelemente werden üblicherweise durch Übereinanderstapeln zu Schallschutzsegmenten und deren Aneinanderreihen zu langen Schallschutzwänden zusammengesetzt. Die räumliche Fixierung der Schallschutzelemente erfolgt dadurch, daß diese zwischen fest im Boden verankerte und in einem vorgegebenen Abstand zueinander stehende Stützen oder andere Unterkonstruktionen eingeschoben werden. Es ist auch möglich, die Schallschutzelemente an bestehenden Bauteilen, wie Bauten oder Baukörpern zu befestigen. Mit Hilfe derartiger Schallschutzwände, die beispielsweise entlang von Eisenbahntrassen, Autobahnen oder entlang von Industrieanlagen aufgestellt werden, können die Lärmemissionen von Verkehrs- oder Industrieanlagen erheblich reduziert werden, so daß naheliegende Wohngebiete wirkungsvoll vor störenden Lärmemissionen geschützt werden.Such soundproofing elements are usually stacked on top of one another on soundproofing segments and their rows assembled into long soundproof walls. The spatial The soundproofing elements are fixed in that this between firmly anchored in the ground and in a predetermined Distance between columns or other substructures be inserted. It is also possible that Soundproofing elements on existing components, such as buildings or To fasten structures. With the help of such noise barriers, which, for example, along railway lines, highways or set up alongside industrial facilities, can reduce the noise emissions from traffic or industrial facilities be significantly reduced so that nearby residential areas be effectively protected against disturbing noise emissions.

Die hierfür verwendeten Schallschutzelemente müssen jedoch die verschiedensten Anforderungen erfüllen, die von akustischen und optischen Anforderungen bis hin zu brandschutztechnischen Forderungen reichen. Außerdem müssen die Schallschutzelemente mechanisch besonders stabil sein und eine hohe Standsicherheit aufweisen, da diese möglichst nahe an die Schallquelle herangerückt werden müssen und dadurch unter Umständen ganz erhebliche Druckunterschiede auf diese einwirken, wie dies beispielsweise bei der Vorbeifahrt eines Eisenbahnzuges der Fall ist. Außerdem müssen die Schallschutzelemente eine hohe Tragsicherheit aufweisen, um einwirkende Belastungen durch Druck oder Stoß, wie dies beispielsweise beim Anprall von Fahrzeugen der Fall sein kann, beschädigungslos oder weitgehend beschädigungslos zu überstehen.The soundproofing elements used for this must, however meet a wide variety of requirements, from acoustic and optical requirements up to fire protection Demands are enough. In addition, the soundproofing elements mechanically particularly stable and high stability have, since these come as close as possible to the sound source have to be and thus possibly quite significant Differences in pressure act on this, such as this the case when a train passes by is. In addition, the soundproofing elements have to be extremely stable have to be applied loads by pressure or impact, such as when a vehicle collides the case may be undamaged or largely survive without damage.

Weitere Anforderungen an solche Schallschutzelemente sind darin zu sehen, daß diese bei deren Herstellung, beim Einsatz und bei der Entsorgung eine möglichst geringe oder keine Umweltbelstung verursachen. Ebenso ist es notwendig, dafür Sorge zu tragen, daß im Schadensfall keine gefährlichen Emissionen, wie beispielsweise giftige Substanzen im Rauch o.dgl. entstehen.Further requirements for such soundproofing elements are to be seen in the fact that these in their manufacture, in use and minimal or no environmental pollution during disposal cause. Likewise, it is necessary to take care of it to ensure that no dangerous emissions occur in the event of damage, such as toxic substances in smoke or the like. arise.

Aus der DE-A-42 20 547 ist nun ein Lärmschutzelement für Lärmschutzwände bekannt geworden, welches zum Erreichen einer guten Schalldämmung und Schallabsorption einen mehrschichtigen Aufbau aufweist. Das Lärmschutzelement besteht aus einem plattenförmigen Element aus einem Kunststoff- und/oder Elastomergranulat, welches unter hohem Preßdruck und unter Beigabe eines Bindemittels ausgeformt worden ist. Auf einer Flachseite dieses plattenförmigen Elementes ist eine alterungsbeständige und insbesondere UV-beständige Schutzschicht aufgebracht, deren Zusammensetzung ähnlich der des plattenförmigen Elementes ist. Diese Schutzschicht dient einerseits dazu, das darunter befindliche plattenförmige Element vor Umwelteinflüssen zu schützen und andererseits dazu, der Rückseite des Lärmschutzelementes ein gefälliges Aussehen zu verleihen, indem sie eingefärbt und/oder mit einer beliebigen Profilierung versehen wird.DE-A-42 20 547 is now a noise protection element for Noise protection walls have become known, which is used to achieve a good sound insulation and sound absorption a multi-layer Has structure. The noise protection element consists of a plate-shaped element made of plastic and / or elastomer granulate, which under high pressure and with addition a binder has been molded. On a flat side this plate-shaped element is resistant to aging and in particular UV-resistant protective layer applied, their composition similar to that of the plate-shaped element is. This protective layer serves on the one hand to ensure that underlying plate-shaped element against environmental influences to protect and on the other hand to the back of the To give the noise protection element a pleasing appearance, by being colored and / or with any profiling is provided.

Auf der anderen Seite des plattenförmigen Elementes befindet sich unmittelbar auf dieser oder in einem Abstand zu dieser eine Schicht aus einem Elastomer- und/oder Kunststoffgranulat, welches mit einem Bindemittel gebunden ist und nur unter geringem Druck formgepreßt ist. Durch den geringen Preßdruck erhält diese Schicht eine poröse Struktur welche die gewünschten Schallabsorptionseigenschaften besitzt. Diese Eigenschaften können noch weiter verbessert werden, wenn der Zwischenraum zwischen dem plattenförmigen Element und der Schallabsorptionsschicht mit einem Fasermaterial ausgefüllt wird.Located on the other side of the plate-shaped element directly on or at a distance from this a layer of an elastomer and / or plastic granulate, which is bound with a binder and only with little Pressure is compression molded. Due to the low pressure this layer receives a porous structure which the desired Has sound absorption properties. These properties can be further improved if the gap between the plate-shaped element and the sound absorption layer is filled with a fiber material.

Mit derartigen Lärmschutzelementen lassen sich Schallschutzwände aufbauen, deren akustische Eigenschaften sehr gut an den jeweiligen Einsatzfall angepaßt werden können. Nachteilig bei diesen Lärmschutzelementen ist jedoch, daß sie einen komplizierten Aufbau besitzen und damit in ihrer Herstellung teuer sind. Außerdem müssen zusätzliche Maßnahmen getroffen werden, um die erforderliche Brandsicherheit zu realisieren, welche die Herstellungskosten weiter erhöhen. Darüberhinaus ist die mechanische Stabilität begrenzt, so daß diese Lärmschutzelemente bei hohen Belastungen durch Druckwellen beschädigt werden können.Noise protection walls can be made with such noise protection elements build up, the acoustic properties of the can be adapted to the respective application. A disadvantage of However, these noise protection elements are complicated Own structure and therefore expensive to manufacture are. Additional measures must also be taken to implement the required fire safety, which further increase manufacturing costs. Furthermore, the mechanical stability limited, so these noise control elements damaged by high pressure waves can be.

Der Erfindung liegt deshalb die Aufgabe zugrunde, ein leicht zu handhabendes Schallschutzelement und ein Verfahren zum Herstellen desselben für Schallschutzwände zu schaffen, welches einfach und billig zu fertigen ist, ein möglichst geringes Gewicht aufweist und das eine hohe mechanische Belastbarkeit, sowie eine gute Brandsicherheit besitzt.The invention is therefore based on the object, an easy Soundproofing element to be handled and a method for producing it to create the same for soundproof walls is simple and cheap to manufacture, as low a weight as possible has a high mechanical strength, as well as good fire safety.

Die der Erfindung zugrundeliegende Aufgabe wird bei einem Schallschutzelement der eingangs genannten Art dadurch gelöst, daß die Schalldämmschicht als heterogener Festkörper mit anisotropen mechanischen Eigenschaften unter Zusatz eines mineralischen, kunststoffvergüteten und hydraulisch abbindenden Bindemittels gebildet ist, daß der Schallabsorptionsschicht mit geringerer Dichte ein organisches Bindemittel aus einem schwer brennbar eingestellten Polyurethan oder chlorsulfoniertem Polyethylen beigemischt ist und daß die Schalldämmschicht und die Schallabsorptionsschicht einstückig ineinander übergehen.The object underlying the invention is in one Soundproofing element of the type mentioned above solved that the soundproofing layer as a heterogeneous solid with anisotropic mechanical properties with the addition of a mineral, plastic-coated and hydraulically setting Binder is formed that the sound absorption layer an organic binder from a lower density flame retardant polyurethane or chlorosulfonated Polyethylene is added and that the sound insulation layer and the sound absorption layer merge into one another.

Das erfindungsgemäße Schallschutzelement ist besonders einfach aufgebaut, weist ein geringes Gewicht auf und ist in seiner Herstellung besonders billig, da einerseits vorzugsweise Recyclingmaterialien zum Einsatz kommen und andererseits dessen Herstellung in einem Arbeitsgang erfolgen kann. Das kann dadurch erfolgen, daß die einzelnen Schichten nacheinander drucklos in eine entsprechende Form eingefüllt und nachfolgend ausgehärtet werden. Damit ist das erfindungsgemäße Schallschutzelement für die Herstellung kostengünstiger Schallschutzwände besonders gut geeignet. Weiterhin ist eine sehr gute Schalldämmung und Schallabsorption zu verzeichnen, wobei die Schallabsorption durch Veränderung der Struktur und der Mischungsverhältnisse an die jeweiligen Anforderungen angepaßt werden kann. Der besondere Vorzug dieses Schallschutzelementes ist jedoch in seinen sehr guten mechanischen Eigenschaften und seinem vergleichsweise geringen Gewicht zu sehen, wodurch es möglich ist, sowohl besonders niedrige Schallschutzwände herzustellen, als auch hohe Schallschutzwände durch kassettenartiges Übereinanderstapeln und Aneinanderreihen der Schallschutzelemente zu realisieren.The soundproofing element according to the invention is particularly simple built up, has a low weight and is in its Manufacture particularly cheap, because on the one hand preferably recycling materials are used and on the other hand its Manufacturing can be done in one operation. It can do that done that the individual layers one after the other filled without pressure into a corresponding form and subsequently be cured. This is the soundproofing element according to the invention for the production of inexpensive soundproof walls particularly well suited. Furthermore, one is very good sound insulation and sound absorption, where the sound absorption by changing the structure and the Mixing ratios adapted to the respective requirements can be. The special advantage of this soundproofing element is however in its very good mechanical properties and its comparatively light weight to see what makes it it is possible to manufacture particularly low soundproof walls, as well as high soundproof walls thanks to cassette-like Stacking and lining up the soundproofing elements to realize.

Die Schallabsorptionsschicht besteht zweckmäßig aus einem Gemenge aus Recycling-Kunststoffgranulat und einer zweiten weitgehend organischen Feststoffphase, vorzugsweise aus unregelmäßig geformten Bruchstücken aus porösem Lavabeton.The sound absorption layer suitably consists of a mixture largely from recycled plastic granulate and a second organic solid phase, preferably from irregular shaped fragments of porous lava clay.

In einer weiteren Fortbildung der Erfindung ist das heterogene Gemenge der Schalldämmschicht und das Gemenge der Schallabsorptionsschicht in einem beliebigen Mischungsverhältnis gemischt, wobei die Schalldämmschicht kontinuierlich in die Schallabsorptionsschicht übergeht. Das hat den besonderen Vorteil, daß das Schalldämmelement besonders günstige mechanische Eigenschaften erhält, wobei gleichzeitig eine weitere Verbesserung der Schallabsorptionseigenschaften erreicht wird. In a further development of the invention, this is heterogeneous Mixture of the sound insulation layer and the mixture of the sound absorption layer mixed in any mixing ratio, the sound insulation layer continuously into the Sound absorption layer passes over. This has the particular advantage that the soundproofing element is particularly favorable mechanical Receives properties, while at the same time another improvement the sound absorption properties is achieved.

Die Dichte der Schallabsorptionsschicht sollte im abgebundenen Zustand vorteilhaft kleiner als 1,1 und die Dichte der Schalldämmschicht im abgebundenen Zustand größer als 1,1 betragen. Dadurch wirden besonders gute Schallabsorptions- und Schalldämmwerte erreicht.The density of the sound absorption layer should be set Condition advantageously less than 1.1 and the density of the soundproofing layer in the set state be greater than 1.1. This makes particularly good sound absorption and sound insulation values reached.

In einer besonderen Ausgestaltung der Erfindung ist innerhalb der Schallabsorptionsschicht und/oder der Schalldämmschicht zur Erhöhung der mechanischen Stabilität eine Armierung aus Armiereisen oder Armiernetzen in zwei oder mehr Ebenen sandwichartig angeordnet. Diese Armierung kann gleichzeitig mit dem Einbringen der einzelnen Schichten in die Form eingelegt werden. Da diese Armierung dadurch allseitig von dem Material der einzelnen Schichten umgeben wird, entsteht nach dem Aushärten des Schallschutzelementes ein besonders fester sandwichartiger Verbund.In a special embodiment of the invention is within the sound absorption layer and / or the sound insulation layer reinforcement to increase the mechanical stability Reinforcing iron or reinforcing nets sandwiched in two or more levels arranged. This reinforcement can be used at the same time inserting the individual layers into the mold will. Because this reinforcement is on all sides of the material of the individual layers is created after curing the soundproofing element is a particularly firm sandwich-like Composite.

Dadurch, daß die einzelnen Ebenen der Armierung unterschiedliche Abstände zueinander aufweisen können, läßt sich eine den jeweiligen Anforderungen entsprechende Statik des Schallschutzelementes realisieren.Because the individual levels of reinforcement are different Can have distances from each other, one can Static of the soundproofing element corresponding to the respective requirements realize.

Eine Verstärkung der Schallabsorption wird dadurch erreicht, daß die Schallabsorptionsschicht auf ihrer der Schallquelle zugewandten Seite mit einer Oberflächenstruktur versehen ist, die aus einstückig angeformten und längs oder quer verlaufenden Rippen oder Vertiefungen bestehen kann, die eine trapezoder wellenförmige Querschnittsgestalt aufweisen. Es ist auch möglich, einstückig angeformte, regelmäßig verteilte Vorsprünge oder Vertiefungen vorzusehen, die eine kegel-, kegelstumpf-, pyramiden oder prismenförmige Querschnittsstruktur aufweisen. Durch die damit erreichte Vergrößerung der Oberfläche wird eine beträchtliche Verstärkung der Schallabsorptionswirkung erreicht.An increase in sound absorption is achieved that the sound absorption layer on their the sound source facing side is provided with a surface structure, those made of one piece and running lengthways or crossways Ribs or depressions may exist that are trapezoidal or have a wavy cross-sectional shape. It is also possible, integrally molded, regularly distributed projections or to provide recesses which are conical, truncated cone, pyramidal or prismatic cross-sectional structure exhibit. Because of the enlargement of the surface becomes a significant enhancement of the sound absorption effect reached.

Weiterhin kann die Schallabsorptionsschicht chemische Zusätze gegen Brennbarkeit enthalten. Als Zusätze gegen Brennbarkeit eignen sich neben schwer brennbar eingestelltem Polyurethan oder chlorsulfoniertem Polyethylen auch Hydroxyde oder Carbonate, beispielsweise Aluminiumhydroxyd (Al(OH)3) oder halogenhaltige Kohlenwasserstoffe, bzw. auch Phosphorsäureesther. Es ist auch möglich, zusätzlich schwer brennbares Granulat zu verwenden, wie es beispielsweise beim Recycling von Kabeln oder Transportbändern anfällt.Furthermore, the sound absorption layer can contain chemical additives to prevent flammability. In addition to the flame-retardant polyurethane or chlorosulfonated polyethylene, suitable combustible additives are also hydroxides or carbonates, for example aluminum hydroxide (Al (OH) 3 ) or halogen-containing hydrocarbons or phosphoric acid ethers. It is also possible to use granules which are difficult to combust, as is the case, for example, when recycling cables or conveyor belts.

Die der Erfindung zugrundeliegende Aufgabe wird weiterhin durch ein Verfahren zur Herstellung von Schallschutzelementen für Schallschutzwände, bestehend aus einer tragfähigen Schalldämmschicht und einer auf einer der Seiten der Schalldämmschicht befindlichen Schallabsorptionsschicht, dadurch gelöst, daß eine erste gleichmäßig durchmischte Mischung aus einem schwer brennbar eingestellten Polyurethan und/oder einem schwer brennbaren Bindemittel auf der Basis von chlorsolfoniertem Polyethylen mit einem Elastomer- und/oder Kunststoffgranulat aus Recyclingmaterial, die Schallabsorptionsschicht bildend, drucklos in eine Form eingefüllt wird. Vor dem Abbinden der ersten Mischung wird eine zweite Mischung größerer Dichte aus einem kunststoffgebundenen Elastomerund/oder Kunststoffgranulat aus Recyclingmaterial und einem mineralischen kunststoffvergütetem und hydraulisch abbindenden Bindemittel, die Schalldämmschicht bildend, drucklos in die Form eingefüllt. Der Abbindevorgang der ersten und der zweiten Schicht erfolgt im wesentlichen zeitgleich unter einer leichten Druckerhöhung.The object underlying the invention will continue through a process for the manufacture of soundproofing elements for soundproof walls, consisting of a load-bearing soundproofing layer and one on one of the sides of the soundproofing layer located sound absorption layer, thereby loosened, that a first evenly mixed mixture of a flame retardant polyurethane and / or a flame-retardant binder based on chlorosol-treated Polyethylene with an elastomer and / or plastic granulate from recycled material, the sound absorption layer forming, is filled without pressure into a mold. In front the setting of the first mixture becomes a second mixture greater density from a plastic-bonded elastomer and / or Plastic granules made from recycled material and one mineral hardened and hydraulically setting Binder, forming the soundproofing layer, into the Form filled. The setting process of the first and the second Layer occurs essentially at the same time under a light layer Pressure increase.

Damit läßt sich das erfindungsgemäße Schallschutzelement mit geringem Aufwand und damit billig fertigen. Durch das im wesentlichen zeitgleiche Abbinden der Schalldämmschicht und der Schallschutzschicht wird ein besonders fester einstückiger Verbund erreicht.The soundproofing element according to the invention can thus be used low effort and therefore cheap to manufacture. Through the in essential simultaneous setting of the sound insulation layer and the soundproofing layer becomes a particularly solid one-piece Verbund reached.

In Fortführung der Erfindung wird die Form vor dem Abbinden der ersten und der zweiten Mischung mit einem Deckel verschlossen und vor dem Abbinden der beiden Mischungen um 180 ° gewendet. Auf diese Weise läßt sich eine gezielte geringfügige Druckerhöhung erreichen, wobei die Schallabsorptionsschicht nicht unnötig verdichtet wird, wie dies durch das unkontrollierte Eindringen des hydraulisch abbindenden Bindemittels der zweiten Mischung in die erste Mischung der Fall sein könnte.In a continuation of the invention, the shape before setting the first and the second mixture closed with a lid and before the two mixtures have set by 180 ° turned. In this way, a targeted minor Reach pressure increase, the sound absorption layer is not compressed unnecessarily, as is done by the uncontrolled Penetration of the hydraulically setting binder the second mixture into the first mixture could.

Zur weiteren Verringerung der Brennbarkeit kann der ersten Mischung ein schwer brennbares Granulat, vorzugsweise aus Kabel- oder Transportbandabfällen und/oder Al(OH)3, halogenhaltige Kohlenwasserstoffe oder Phosphorsäreester beigemischt werden.In order to further reduce the flammability, the first mixture can be mixed with a difficultly flammable granulate, preferably from cable or conveyor belt waste and / or Al (OH) 3 , halogen-containing hydrocarbons or phosphoric acid esters.

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden. In der zugehörigen Zeichnung ist ein erfindungsgemäß hergestelltes Schallschutzelement 1 dargestellt, welches aus einer Schalldämmschicht 2 und einer fest mit dieser verbundenen Schallabsorptionsschicht 3 besteht. Zusätzlich kann auf der der Schallabsorptionsschicht 3 gegenüberliegenden Seite eine nicht dargestellte Schutzschicht vorgesehen werden. Dabei bestehen sowohl die Schalldämmschicht 2 als auch die Schallabsorptionsschicht 3 aus einem gleichmäßig durchmischten Elastomer- und/oder Kunststoffgranulat, wobei die Schalldämmschicht 2 unter Beigabe eines mineralischen, Kunststoffvergüteten hydraulisch abbindenden Bindemittels, beispielsweise Zement, zu einem festen Verbund mit heterogenem Gefüge ausgehärtet ist. Darüberhinaus ist es möglich, der Schalldämmschicht 2 eine Mischung aus Kies und Sand beizumischen.The invention is intended to be based on an exemplary embodiment are explained in more detail. In the accompanying drawing is a Soundproofing element 1 produced according to the invention is shown, which consists of a sound insulation layer 2 and a solid with this connected sound absorption layer 3. In addition, on the opposite side of the sound absorption layer 3 Side a protective layer, not shown be provided. There is both the sound insulation layer 2 and the sound absorption layer 3 from a uniform mixed elastomer and / or plastic granulate, the sound insulation layer 2 with the addition of a mineral, Plastic-coated hydraulically setting binder, for example cement, to form a firm bond with heterogeneous structure is cured. In addition, it is possible the sound insulation layer 2 is a mixture of gravel and sand to mix.

Die Dichte der Schalldämmschicht 2 sollte größer 1,1 und die Dichte der Schallabsorptionsschicht 3 sollte kleiner 1,1 betragen. Die Dichte läßt sich problemlos durch Veränderung des Mischungsverhältnisses einstellen. Beispielsweise kann die Schallabsorptionsschicht 3 zusätzlich unregelmäßig geformte Bruchstücke aus Lavabeton enthalten, so daß eine besonders gute Schallabsorptionswirkung erreicht wird. The density of the soundproofing layer 2 should be greater than 1.1 and the Density of the sound absorption layer 3 should be less than 1.1. The density can be easily changed by changing the Set the mixing ratio. For example, the Sound absorption layer 3 additionally irregularly shaped Fragments of lavabone contain so that a special good sound absorption effect is achieved.

Durch diese Mischung werden sehr gute Schallabsorptionseigenschaften erreicht, wobei auch die brandschutztechnischen Anforderungen sehr leicht erfüllt werden können, indem chemische Zusätze gegen Brennbarkeit und/oder schwer brennbares Granulat, das beispielsweise aus Kabel- oder Transportbandabfällen oder Recyclingmaterial gewonnen werden kann, beigemischt werden. Zusätzlich können schwer brennbar eingestellte PU-Bindemittel verwendet werden.This mixture gives very good sound absorption properties achieved, including the fire protection requirements can be fulfilled very easily by chemical Additives against flammability and / or flame-retardant granules, for example from cable or conveyor belt waste or recycling material can be obtained. In addition, PU binders that are difficult to burn can be used be used.

Weiterhin befindet sich innerhalb der Schalldämmschicht 2 eine Armierung 4 aus Armiereisen oder Armiernetzen, wobei auch Glas, Glasfasermaterialien oder Kunststoffe zur Anwendung kommen können, die in zwei oder mehr Ebenen sandwichartig übereinander angeordnet sind. Die mehrlagig angeordneten Armierungen 4 können auch unterschiedliche Abstände zueinander aufweisen.Furthermore, there is a within the sound insulation layer 2 Reinforcement 4 made of reinforcement bars or reinforcement nets, also Glass, glass fiber materials or plastics for use can come out sandwiched in two or more levels are arranged one above the other. The multi-layered reinforcements 4 can also have different distances from each other exhibit.

Durch diese Armierung 4 wird eine erhebliche Verbesserung der mechanischen Stabilität des Schallschutzelementes 1 erreicht, wobei es selbstverständlich möglich ist, auch in der Schalldämmschicht 2 eine Armierung 4 vorzusehen.This reinforcement 4 is a significant improvement in achieved mechanical stability of the soundproofing element 1, it is of course possible, also in the soundproofing layer 2 provide a reinforcement 4.

Zusätzlich ist die Schallabsorptionsschicht 3 mit einer Oberflächenstruktur versehen, die mit einstückig angeformten und längs oder quer verlaufenden Rippen 5 oder Vertiefungen versehen ist, die eine trapez- oder wellenförmige Oberflächenstruktur bilden und auf der der Schallquelle zugewandten Außenseite angeordnet sind.In addition, the sound absorption layer 3 has a surface structure provided with molded in one piece and provided with longitudinal or transverse ribs 5 or depressions which is a trapezoidal or wavy surface structure form and on the facing the sound source Are arranged outside.

Anstelle der Rippen 5 können auch einstückig an die Schallabsorptionsschicht 3 angeformte oder in diese eingeformte, regelmäßig verteilte Vorsprünge oder Vertiefungen mit im Querschnitt kegel-, kegelstumpf-, pyramiden- oder prismenförmiger Gestalt vorgesehen werden. Aus optischen Gründen ist es zweckmäßig, wenn die Höhe aller Rippen 5 oder Vorsprünge gleich ist, oder Gruppen der Rippen oder Vorsprünge gleiche Höhen aufweisen. Für Vertiefungen gilt Entsprechendes. Instead of the ribs 5 can also be integrally attached to the sound absorption layer 3 molded on or molded in, regularly distributed projections or depressions with a cross-section more conical, truncated cone, pyramid or prism shaped Shape can be provided. For visual reasons, it is advisable if the height of all the ribs 5 or protrusions are the same is, or groups of ribs or protrusions of equal heights exhibit. The same applies to deepening.

Aus den Erfordernissen der Schallabsorption erweist sich jedoch die Anordnung der erwähnten Rippen 5, bzw. entsprechender Vertiefungen, als besonders günstig. Diese Rippen 5 stehen auf der vollflächigen Schallabsorptionsschicht 3, die eine Stärke von etwa 25 mm aufweist und sind mit dieser einstückig verbunden. Da sowohl die Schallabsorptionsschicht 3, als auch die aus dieser hervorstehenden Rippen 5 eine poröse Struktur aufweisen, die durch die Verwendung von speziell abgemischtem Granulat aus Recycling-Gummi oder -Kunststoff besteht, werden in Verbindung mit den Hohlräumen zwischen den einzelnen Körnern des Granulates besonders gute Schallabsorptionseigenschaften erreicht. Die Kornform des Granulates kann rund, eckig oder verschiedenförmig sein. Die Größe der Hohlräume sollte zusammen etwa 50 Vol-% ergeben, wobei die Hohlräume durch das noch zu beschreibende Herstellungsverfahren mehrheitlich zusammenhängend sind.However, from the requirements of sound absorption it turns out the arrangement of the mentioned ribs 5, or corresponding Recesses, as particularly cheap. These ribs 5 stand up the full-area sound absorption layer 3, which is a strength of about 25 mm and are integrally connected to this. Since both the sound absorption layer 3 and the from this projecting ribs 5 have a porous structure, through the use of specially blended Granules are made from recycled rubber or plastic in conjunction with the voids between each Grains of the granulate have particularly good sound absorption properties reached. The grain shape of the granules can be round, be angular or varied. The size of the cavities should add up to about 50% by volume, with the cavities mostly by the manufacturing process to be described are contiguous.

Die einzelnen Körner des Granulates werden durch ein organisches Bindemittel auf der Basis beispielsweise von Polyurethan oder chlorsulfoniertem Polyetylen zu einem elastischen Körper miteinander verbunden. Die Verklebung der Körner des Granulates erfolgt unter geringem Druck und bei Normaltemperatur oder bei geringfügig erhöhter Temperatur.The individual granules of the granulate are separated by an organic one Binder based on, for example, polyurethane or chlorosulfonated polyetylene to form an elastic body connected with each other. Gluing the granules takes place under low pressure and at normal temperature or at a slightly elevated temperature.

Die Schalldämmschicht 3 ist gleichzeitig der im statischen Sinne tragende Teil des Schallschutzelementes 1, wobei die Dicke dieser Schicht von den statischen Erfordernissen abhängt. In der Regel sollte die Schalldämmschicht 3 eine Dicke von etwa 80 - 100 mm aufweisen.The sound insulation layer 3 is at the same time in static Sensible part of the soundproofing element 1, the Thickness of this layer depends on the static requirements. As a rule, the sound insulation layer 3 should have a thickness about 80 - 100 mm.

Die Herstellung der Schallschutzelemente 1 ist besonders einfach und kann in wenigen Arbeitsgängen erfolgen. Hierzu ist zunächst eine erste Mischung aus einem gleichmäßig durchmischten, schwer brennbar eingestellten PU-, oder einem schwer brennbaren Bindemittel auf der Basis von chlorsulfoniertem Polyethylen und Elastomer- und/oder Kunststoffgranulat aus Recyclingmaterial drucklos in eine Form einzufüllen, um die Schallabsorptionsschicht 3 herzustellen. The production of the soundproofing elements 1 is particularly simple and can be done in a few work steps. This is first a first mixture of an evenly mixed, flame-retardant PU, or a difficult flammable binder based on chlorosulfonated Polyethylene and elastomer and / or plastic granulate from recycled material to fill without pressure into a mold in order to Produce sound absorption layer 3.

Da sich die Schallabsorptionsschicht immer auf der Seite des Schallschutzelementes befindet, auf der die Lärmemission, beispielsweise durch Kraftfahrzeuge, stattfindet, sollte die Schallabsorptionsschicht besonders schwer brennbar sein. Das kann dadurch erreicht werden, daß dieser ersten Mischung zusätzlich ein Granulat aus einem schwer entflammbaren Material, wie beispielsweise Kabel- oder Transportbandabfällen, beigemischt wird. Außerdem kann noch Al(OH)3, halogenhaltige Kohlenwasserstoffe oder Phosphorsäureester beigemischt werden.Since the sound absorption layer is always on the side of the soundproofing element on which the noise emission occurs, for example from motor vehicles, the sound absorption layer should be particularly difficult to combust. This can be achieved by additionally adding a granulate made from a flame-retardant material, such as cable or conveyor belt waste, to this first mixture. Al (OH) 3 , halogen-containing hydrocarbons or phosphoric acid esters can also be added.

Unmittelbar anschließend, d.h. vor dem Aushärten dieser ersten Schicht geringerer Dichte, wird eine zweite Mischung größerer Dichte, die Schalldämmschicht 2 aus einem kunststoffgebundenen Elastomer und/oder Kunststoffgranulat aus Recyclingmaterial mit einer Beimischung von mineralischen, hydraulisch abbindenden Bindemitteln drucklos in die Form eingefüllt. Das Einfüllen dieser Schicht höherer Dichte wird kurzzeitig unterbrochen, um in den gewünschten Ebenen das Einlegen der Armierung 4 zu ermöglichen. Nach dem Einfüllen der ersten und der zweiten Mischung wird die Form mit einem entsprechenden Deckel verschlossen. Eine anschließende Drehung der Form um 180 ° kann von Vorteil sein, da dadurch das Eindringen von mineralischem Bindemittel in die Schallabsorptionsschicht vermieden wird, wodurch die Schallabsorptionsfähigkeit negativ beeinflußt werden könnte.Immediately afterwards, i.e. before curing this first Layer of lower density, a second mixture becomes larger Density, the sound insulation layer 2 made of a plastic-bound Elastomer and / or plastic granulate made from recycled material with an admixture of mineral, hydraulically setting Binding agents filled into the mold without pressure. The filling this layer of higher density is briefly interrupted, to insert the reinforcement in the desired levels 4 to enable. After filling the first and the The second mixture is the mold with an appropriate lid locked. A subsequent rotation of the mold by 180 ° can be advantageous because it prevents the penetration of mineral Avoid binders in the sound absorption layer is, which negatively affects the sound absorption ability could be.

Ist eine zusätzliche Schutzschicht vorgesehen, so ist diese vor dem endgültigen Aushärten der ersten und der zweiten Schicht aufzubringen und gemeinsam mit den anderen Schichten auszuhärten. Zur Beschleunigung dieses Vorganges kann die Form auch zusätzlich erwärmt und/oder Wasserdampf in die Form geblasen werden. Weiterhin ist es möglich, das Aushärten unter leichtem Druck vorzunehmen. Hierzu genügt es, die Form mit einem geeigneten Verschluß oder Deckel zu versehen und diesen leicht in die Form zu drücken. Durch das gleichzeitige Aushärten der Schalldämmschicht 2 und der Schallabsorptionsschicht 3 unter leichtem Druck wird an der Grenzfläche zwischen beiden Schichten eine gute Verbindung erreicht. Hierzu ist es zweckmäßig, wenn die Form eine ausreichende Eigensteifigkeit aufweist, so daß die beim Pressen auftretenden hydrostatischen Drücke diese nicht verbiegen können.If an additional protective layer is provided, this is before the final curing of the first and the second Apply layer and together with the other layers harden. To speed up this process, the shape also additionally heated and / or steam blown into the mold will. It is also possible to cure under to apply light pressure. To do this, it is sufficient to include the shape a suitable closure or cover and this easy to press into the mold. By curing at the same time the sound insulation layer 2 and the sound absorption layer 3 under slight pressure is at the interface between the two Layers achieved a good connection. For this it is advisable if the shape has sufficient inherent rigidity, so that the hydrostatic occurring during pressing Press these can not bend.

Außerdem ist es zweckmäßig, die Innenseite der Form vor dem Einfüllen der Mischungen mit einem auf die Bindemittel abgestimmten geeigneten Trennmittel zu versehen.In addition, it is appropriate to the inside of the mold before Pour the mixtures in with a suitable one for the binding agent suitable release agent.

Die Schallabsorptionsschicht 3 und die Schalldämmschicht 2 können auch in der Weise hergestellt werden, daß die Mischungsverhältnisse der ersten und der zweiten Schicht während des Einfüllens in die Form kontinuierlich verändert werden. Damit kann ein Schallschutzelement 1 hergestellt werden, bei dem ein fließender Übergang von der Schallabsorptionsschicht 3 in die Schalldämmschicht 2 gegeben ist. Außerdem kann der ersten und der zweiten Mischung Farbe beigemischt werden, um die Farbgebung des Schallschutzelementes an die Umgebung des vorgesehenen Aufstellortes anzupassen.The sound absorption layer 3 and the sound insulation layer 2 can also be prepared in such a way that the mixing ratios during the first and second layers the filling in the form are continuously changed. A soundproofing element 1 can thus be produced at a smooth transition from the sound absorption layer 3 is given in the sound insulation layer 2. In addition, the first and second blends to be mixed the coloring of the soundproofing element to the environment of the to adapt the intended installation site.

Das erfindungsgemäß hergestellte Schallschutzelement 1 ist besonders einfach und billig herzustellen und weist bei einem vergleichsweise geringen Gewicht eine sehr gute mechanische Stabilität auf. Ein besonderer Vorteil dieser Lösung ist auch darin zu sehen, daß in der Hauptsache Recycling- oder Abfallmaterialien zur Herstellung des Schallschutzelementes 1 verwendet werden können, so daß wegen des enormen Anfalls dieser Materialien eine sinnvolle Verwertung aufgezeigt wird.The soundproofing element 1 produced according to the invention is special easy and inexpensive to manufacture and has one comparatively low weight a very good mechanical Stability on. A particular advantage of this solution is also to see that mainly recycling or waste materials used to manufacture the soundproofing element 1 can be, so that because of the enormous attack this Materials is shown a meaningful utilization.

An die Montage derartiger Schallschutzelemente werden keine besonderen Anforderungen gestellt. Es ist lediglich dafür Sorge zu tragen, daß die beim Vorbeifahren von Fahrzeugen o.dgl. entstehenden Kräfte, die auf das Schallschutzelement einwirken, vollständig vom Fundament oder der Unterkonstruktion aufgenommen werden.None of these elements are installed special requirements. It is only for that To ensure that the passing of vehicles or the like arising forces on the soundproofing element act completely from the foundation or the substructure be included.

So ist es beispielsweise möglich, relativ niedrige Schallschutzelemente zu fertigen, die unmittelbar neben den Bahngleisen aneinandergereiht montiert werden können. Das hat den entscheidenden Vorteil, daß einerseits der größte Teil des bei der Vorbeifahrt eines Eisenbahnzuges entstehende Lärm absorbiert werden kann und andererseits die freie Sicht der Passagiere nicht behindert wird.For example, it is possible to have relatively low soundproofing elements to manufacture that right next to the train tracks can be mounted in a row. That has the decisive advantage that on the one hand the majority of the noise generated when a train passes by and on the other hand the free view of the passengers is not hindered.

Claims (10)

  1. Sound protection element for sound protection walls, consisting of a sound insulation layer (2) capable of bearing and, at least on one side of the sound insulation layer (2), a sound absorption layer (3), whereat the sound insulation layer (2) and the sound absorption layer (3) contain elastomer, rubber or plastics granulate made from recycled material, characterized by the fact
    that the sound insulation layer (2) is constructed as a heterogeneous solid with anisotropic mechanical properties under addition of a mineral, plastics-improved and hydraulically setting binding agent,
    that an organic binding agent made from hardly combustible polyurethane or chlorosulfonated polyethylene is added to the low-density sound insulation layer (3),
    that the sound insulation layer (2) and the sound absorption layer (3) are joined to turn into one piece.
  2. Sound protection element in accordance with Claim 1, characterized by the fact that the sound absorption layer (3) consists of a mixture of recycled plastics granulate and a second anorganic solid phase, preferably consisting of irregularly shaped fragments of porous lava concrete.
  3. Sound protection element in accordance with Claim 1, characterized by the fact that the heterogeneous mixture of the sound insulation layer (2) and the mixture of the sound absorption layer (3) are each mixed in a random mixing ratio and that the sound insulation layer (2) gradually turns into the sound absorption layer (3).
  4. Sound protection element in accordance with one of the Claims 1 to 4, characterized by the fact that the density of the sound absorption layer (3) is less than 1.1 in the set condition and that the density of the sound insulation layer (2) is greater than 1.1 in the set condition.
  5. Sound protection element in accordance with one of the Claims 4, characterized by the fact that a reinforcement of metal, plastic or glass is arranged sandwich-like in one or more levels within the sound insulation layer (2) and/or the sound absorption layer (3).
  6. Sound protection element in accordance with one of the Claims 1 to 7, characterized by the fact that the sound absorption layer (3) is equipped with a geometric surface structure on the side towards the source of sound, consisting of one-piece formed longitudinal or transverse ribs (5) with trapeze or wave shaped cross sections or of regularly spaced projecting and recessed parts with a cone, truncated cone, pyramid or prism shaped cross section structure.
  7. Sound protection element in accordance with one of the Claims 1 to 6, characterized by the fact that, in order to reduce the combustibility, Al(OH)3 and/or halogenated hydrocarbons and/or phosphoric ester are added to the sound absorption layer (3).
  8. Process to manufacture a sound protection element for sound protection walls, consisting of a sound insulation layer (2) capable of bearing and a sound absorption layer (3) on one side of the sound insulation layer (2), characterized by the fact that
    a first, evenly mixed mixture of a hardly combustible polyurethane and/or a hardly combustible binding agent on the basis of chlorosulfonated polyethylene with an elastomer and/or plastics granulate made from recycled material, forming the sound absorption layer (3), is poured into a mould unpressurized,
    that, prior to setting of the first mixture, a second mixture of plastic-bonded elastomer and/or plastics granulate made from recycled material and a mineral plastic-improved and hydraulically setting binding agent, forming the sound insulation layer (2), is poured into the mould unpressurized, and
    that the setting process of the first and second layers takes place under slightly increased pressure essentially at the same time.
  9. Process in accordance with Claim 8, characterized by the fact that the mould is closed with a cover prior to setting of the first and the second mixture and that the closed mould is reversed by 180° prior to setting of the first and second mixtures.
  10. Process in accordance with Claim 8, characterized by the fact that a hardly combustible granulate, preferably consisting of cable and transport conveyor belt waste and/or Al(OH)3, halogenated hydrocarbons or phosphoric ester is added to the first mixture.
EP95104051A 1994-03-30 1995-03-20 Sound-proofing element and method for the production of a sound-proofing element Expired - Lifetime EP0679765B1 (en)

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AT (1) ATE166682T1 (en)
DE (2) DE4411003C2 (en)

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EP0825302A1 (en) * 1996-08-20 1998-02-25 Alpha Brevet S.A. Sound absorption device, particularly along roads
WO1998026131A1 (en) * 1996-12-10 1998-06-18 Paul Andermatt Sound-proofing wall
WO2003008711A1 (en) 2001-07-16 2003-01-30 Paul Andermatt Soundproofing wall
DE10141265B4 (en) * 2001-08-22 2005-02-24 Hans-Peter Bock Modified composite panel
AT8069U1 (en) * 2004-10-20 2006-01-15 Joro System Ges M B H COMPONENT FOR NOISE PROTECTION WALL
EP2311900B1 (en) 2005-09-07 2015-03-11 Nippon Soda Co., Ltd. Star polymer and method for producing the same
DE102008060102A1 (en) * 2008-11-28 2010-06-02 Betonwerk Schuster Gmbh Noise control installation comprises a carrier layer formed from reinforced or unreinforced concrete, and an absorber layer provided on the carrier layer and formed from a mineral binder and a mineral aggregate
ITRM20100049A1 (en) * 2010-02-11 2011-08-12 Francesco Lipari ARMADILLO ENERGY-RESISTANT BARRIER OR AN INTEGRATED SYSTEM FOR THE PRODUCTION OF CLEAN ENERGY FROM THE PASSAGE OF VEHICLES WITH A DECREASE OF THE ROAD NOISE
DE102010014130A1 (en) * 2010-04-07 2011-10-13 Conradi + Kaiser Gmbh Soundproofing panel, soundproofing wall and method of making a soundproofing panel
DE102010053612A1 (en) * 2010-12-07 2012-06-14 Conradi + Kaiser Gmbh Soundproofing element, soundproof wall, shutter and method for producing a soundproofing element

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DE4411003A1 (en) 1995-10-05
ATE166682T1 (en) 1998-06-15
DE4411003C2 (en) 1996-01-25
EP0679765A1 (en) 1995-11-02
DE59502306D1 (en) 1998-07-02

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