EP0413295A1 - Geotextile for the reinforcement of asphalt-layers - Google Patents

Geotextile for the reinforcement of asphalt-layers Download PDF

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Publication number
EP0413295A1
EP0413295A1 EP90115547A EP90115547A EP0413295A1 EP 0413295 A1 EP0413295 A1 EP 0413295A1 EP 90115547 A EP90115547 A EP 90115547A EP 90115547 A EP90115547 A EP 90115547A EP 0413295 A1 EP0413295 A1 EP 0413295A1
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EP
European Patent Office
Prior art keywords
composite
geotextile
component
geotextile according
fabric
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EP90115547A
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German (de)
French (fr)
Inventor
Kent Von Maubeuge
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Hoechst AG
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Hoechst AG
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/009—Condensation or reaction polymers
    • D04H3/011—Polyesters
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/10—Open-work fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/005—Methods or materials for repairing pavings
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/16—Reinforcements
    • E01C11/165—Reinforcements particularly for bituminous or rubber- or plastic-bound pavings
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/024—Fabric incorporating additional compounds
    • D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
    • D10B2403/02411—Fabric incorporating additional compounds enhancing mechanical properties with a single array of unbent yarn, e.g. unidirectional reinforcement fabrics
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/024—Fabric incorporating additional compounds
    • D10B2403/0243—Fabric incorporating additional compounds enhancing functional properties
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/20—Industrial for civil engineering, e.g. geotextiles
    • D10B2505/204—Geotextiles

Definitions

  • the invention relates to a geotextile for the reinforcement of asphalt layers in road construction.
  • geotextiles have been used as an intermediate layer between the old and new road surfaces when renovating worn bituminous road surfaces.
  • geotextiles can also be used when building new roads between the road surface and the base course. The mode of operation and the advantages of such geotextiles were discussed at a conference in Liège, Belgium from March 8, 1989 to March 10, 1989 ("Reflective Cracking in Pavements", Assessment and Control).
  • nonwovens which are usually formed as spunbond from continuous filaments (spunbond) and consist of polypropylene or, due to the higher melting point, increasingly of polyester (see, for example, "Die Asphalt No” 1/88, p. 15ff or "Installation Guide for Paving Fabric in Asphalt Overlays” by Hoechst Fiber Industries, USA).
  • mesh fabrics made of high-strength polyester yarns are used (see e.g. "Bitumen, Tar, Asphalt, Peche", 25th year, April 1974).
  • grids have recently been used, which are stretched perforated films made of cast or extruded plastic, usually made of polypropylene.
  • nonwoven fabric inserted between the road surface and the subsurface lies mainly in a certain buffer effect, which should prevent or at least delay the development or propagation of cracks. Furthermore the bitumen-impregnated nonwoven acts as a water barrier to prevent surface water from penetrating the base layer.
  • nonwovens are often unsatisfactory in preventing cracking and propagation by vertical movements or very large horizontal movements, which is presumably due to their inadequate strength and elongation properties.
  • the invention has for its object to provide a geotextile for the reinforcement of asphalt layers in road construction, which particularly effectively prevents cracking and propagation in the asphalt layers, has a good sealing effect against the penetration of surface water and is easy to install.
  • This object is achieved according to the invention in that it is a composite consisting of two components, one component of which is a nonwoven fabric and the second component of which is a woven, knitted fabric, laid scrim, grid or another flat structure of a defined layer of yarn.
  • DE-GM 71 33 997 shows a composite of a nonwoven made of crimped polyamide fibers and a needled lattice fabric made of continuous filaments, which are connected to one another by a waterproof binder. This composite material is used as an erosion-preventing insulation material in dyke and sewer construction.
  • the geotextile designed according to the invention serves to reinforce asphalt layers in road construction.
  • the geotextile designed according to the invention has a surprisingly high resistance to crack formation and propagation. This should be based on a combination effect between the advantageous properties of the two components of the composite.
  • the geotextile designed according to the invention has an excellent sealing effect, which prevents the penetration of water and thus also of organic and inorganic constituents.
  • the composite material is preferably in the form of a Raschel fabric, in which the two components of the composite material are connected by weft-laying technology.
  • This is a warp knitting technique in which the nonwoven is reinforced in a direction-oriented manner by yarns, preferably high-strength yarns.
  • This warp knitting technique is carried out on so-called Raschel machines.
  • a particularly suitable Raschel machine for producing a composite material designed according to the invention is the RS 3 MSU-V from Karl Mayer, Textilmaschinenfabrik GmbH, Obertshausen.
  • the nonwoven fabric can be made from polypropylene, polyethylene, polyamide, polyacrylonitrile or other suitable raw materials; however, polyesters, in particular polyethylene terephthalate, are preferred because of their high temperature resistance.
  • the nonwoven fabric is preferably formed as a spunbonded fabric from continuous filaments, i.e. it is a so-called spunbond.
  • the nonwoven can be mechanically, thermally or chemically consolidated; mechanical strengthening is preferred because of the flexibility and bitumen absorbency of such a nonwoven.
  • the weight per unit area of the nonwoven is preferably in the range from 50 to 300 g / cm2, preferably between 100 and 180 g / m2.
  • the selection of the raw material for the second component of the composite is similar to that of the nonwoven. Both components of the composite are particularly preferably produced from the same raw material, that is to say in particular from polyesters, irrespective of whether the composite contains a fabric, scrim, grid or knitted fabric or is designed as a Raschel fabric.
  • the weight per unit area of the second component of the composite is preferably in the range from 100 to 500 g / m 2.
  • the maximum tensile force of the second component of the composite should be 10 to 200 kN / m, preferably above 25 kN / m (whereby the maximum tensile force is to be understood as the maximum tensile force of a fabric of 1 m width).
  • the elongation at break is preferably in the range between 5 and 35%, preferably between 10 and 20%.
  • the maximum tensile strength of the second component of the composite can be equated to the maximum tensile strength of the composite itself, since the nonwoven fabric, particularly due to its high elongation, makes no significant contribution to the maximum tensile strength.
  • the bond between the geotextile and the two asphalt layers is made by an adhesive, e.g. pure bitumen, achieved.
  • an adhesive e.g. pure bitumen
  • the final amount of adhesive must be determined beforehand.
  • the amount of adhesive must correspond at least to the pore content of the composite, taking into account migration into the damaged layer.
  • the nonwoven fabric consists of a Trevira spunbond, in which Trevira high-strength yarns are integrated by weft-laying technique or which is connected by sewing to a fabric made of Trevira high-strength yarns.
  • the composite material designed according to the invention has a particularly high resistance to crack formation and propagation.
  • the fleece component ensures an optimal bond between the asphalt and the geotextile; it also prevents water from penetrating and forms a buffer that absorbs forces through the cracks.
  • the composite is expediently used in such a way that the nonwoven lies on the underside.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Road Paving Structures (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)

Abstract

There is described a geotextile which is used in particular in the restoration of worn bituminous road surfaces as an interlayer between the old and the new road surface. The geotextile is a composite formed from a nonwoven and a woven, knitted, laid or otherwise constructed fabric of defined yarn position. The nonwoven is preferably constructed as a Raschel material, in which case the nonwoven and the fabric of defined yarn position are bonded together by the weft-laying Raschel technique. The geotextile described has particularly advantageous reinforcing and sealing properties and is characterised by good layability.

Description

Die Erfindung betrifft ein Geotextil für die Bewehrung von Asphaltschichten im Straßenbau.The invention relates to a geotextile for the reinforcement of asphalt layers in road construction.

Seit vielen Jahren werden Geotextilien bei der Renovierung von abgefahrenen bituminösen Fahrbahndecken als Zwischenlage zwischen der alten und neuen Fahrbahndecke verwendet. Geo­textilien können jedoch auch beim Neubau von Straßen zwi­schen Fahrbahndecke und Tragschicht eingesetzt werden. Die Wirkungsweise und die Vorteile derartiger Geotextilien wur­den auf einer Konferenz in Liège, Belgien vom 8.03.89 bis 10.03.89 diskutiert ("Reflective Cracking in Pavements", Assessment and Control).For many years, geotextiles have been used as an intermediate layer between the old and new road surfaces when renovating worn bituminous road surfaces. However, geotextiles can also be used when building new roads between the road surface and the base course. The mode of operation and the advantages of such geotextiles were discussed at a conference in Liège, Belgium from March 8, 1989 to March 10, 1989 ("Reflective Cracking in Pavements", Assessment and Control).

In der Praxis haben sich im wesentlichen zwei grundsätzliche Konzepte durchgesetzt. Zum einen werden Vliesstoffe verwen­det, die üblicherweise als Spinnvlies aus Endlosfilamenten (Spunbond) ausgebildet sind und aus Polypropylen oder, wegen des höheren Schmelzpunktes, in zunehmendem Ausmaß aus Poly­ester bestehen (vgl. z. B. "Die Asphaltstraße" 1/88, S.15ff oder "Installation Guide for Paving Fabric in Asphalt Overlays" von Hoechst Fibre Industries, USA). Zum anderen werden Gittergewebe aus hochfesten Polyestergarnen einge­setzt (vgl. z.B. "Bitumen, Teer, Asphalt, Peche", 25. Jahr­gang, April 1974). Außerdem werden in neuerer Zeit soge­nannte Grids verwendet, bei denen es sich um gereckte Loch­folien aus gegossenem bzw. extrudiertem Kunststoff, meist aus Polypropylen, handelt.In practice, two basic concepts have prevailed. On the one hand nonwovens are used, which are usually formed as spunbond from continuous filaments (spunbond) and consist of polypropylene or, due to the higher melting point, increasingly of polyester (see, for example, "Die Asphaltstraße" 1/88, p. 15ff or "Installation Guide for Paving Fabric in Asphalt Overlays" by Hoechst Fiber Industries, USA). On the other hand, mesh fabrics made of high-strength polyester yarns are used (see e.g. "Bitumen, Tar, Asphalt, Peche", 25th year, April 1974). In addition, so-called grids have recently been used, which are stretched perforated films made of cast or extruded plastic, usually made of polypropylene.

Der Vorteil des zwischen Fahrbahndecke und Untergrund einge­legten Vliesstoffes liegt hauptsächlich in einer gewissen Pufferwirkung, die das Entstehen bzw. die Fortpflanzung von Rissen verhindern oder zumindest verzögern soll. Außerdem wirkt der bitumenimprägnierte Vliesstoff als Wassersperre, der das Eindringen von Oberflächenwasser in die Tragschicht verhindern soll. Wie sich in der Praxis gezeigt hat, sind Vliesstoffe jedoch im Hinblick auf ein Verhindern von Rißbildung und -fortpflanzung durch vertikale Bewegungen oder sehr große horizontale Bewegungen häufig nicht zufrie­denstellend, was vermutlich auf ihre unzureichenden Festig­keits- und Dehnungseigenschaften zurückzuführen ist.The advantage of the nonwoven fabric inserted between the road surface and the subsurface lies mainly in a certain buffer effect, which should prevent or at least delay the development or propagation of cracks. Furthermore the bitumen-impregnated nonwoven acts as a water barrier to prevent surface water from penetrating the base layer. However, as has been shown in practice, nonwovens are often unsatisfactory in preventing cracking and propagation by vertical movements or very large horizontal movements, which is presumably due to their inadequate strength and elongation properties.

Wenn auch Gittergewebe wegen ihrer besseren Festigkeits­eigenschaften Relativbewegungen zwischen Fahrbahndecke und Tragschicht gut auffangen und somit eine bessere Wirkung beim Verhindern der Rißbildung und -fortpflanzung entfalten, haben sie jedoch den Nachteil, daß durch die groben Maschen von 20 bis 40mm Risse durchtreten können. Nachteilig ist ferner, daß sie praktisch keine Wassersperre gegen das Ein­dringen von Oberflächenwasser bilden. Auch bereiten der­artige Gittergewebe aufgrund ihrer Steifigkeit verlegetech­nische Schwierigkeiten, was oft zu einem mangelhaften Ver­bund und somit zu einem frühzeitigen Lösen der Asphalt­schicht führt.Even if lattice fabrics absorb relative movements between the road surface and the base course due to their better strength properties and thus have a better effect in preventing crack formation and propagation, they have the disadvantage that cracks can pass through the coarse meshes of 20 to 40 mm. Another disadvantage is that they form practically no water barrier against the ingress of surface water. Such lattice fabrics also cause installation difficulties due to their rigidity, which often leads to a poor bond and thus to premature loosening of the asphalt layer.

Der Erfindung liegt die Aufgabe zugrunde, ein Geotextil für die Bewehrung von Asphaltschichten im Straßenbau zu schaf­fen, das besonders wirkungsvoll die Rißbildung und -fort­pflanzung in den Asphaltschichten verhindert, eine gute Dichtungswirkung gegen das Eindringen von Oberflächenwasser besitzt und sich leicht verlegen läßt.The invention has for its object to provide a geotextile for the reinforcement of asphalt layers in road construction, which particularly effectively prevents cracking and propagation in the asphalt layers, has a good sealing effect against the penetration of surface water and is easy to install.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß es ein aus zwei Komponenten bestehender Verbundstoff ist, dessen eine Komponente ein Vliesstoff und dessen zweite Kom­ponente ein Gewebe, Gewirke, Fadengelege, Grid oder ein an­deres Flächengebilde definierter Garnlage ist.This object is achieved according to the invention in that it is a composite consisting of two components, one component of which is a nonwoven fabric and the second component of which is a woven, knitted fabric, laid scrim, grid or another flat structure of a defined layer of yarn.

Verbundstoffe aus einem Vliesstoff und einem Flächengebilde definierter Garnlage sind an sich bereits bekannt. So zeigt das DE-GM 71 33 997 einen Verbundstoff aus einem Vliesstoff aus gekräuselten Polyamidfasern und einem eingenadelten Git­tergewebe aus Endlosfilamenten, die durch ein wasserfestes Bindemittel miteinander verbunden sind. Dieser Verbundstoff wird als erosionsverhindernder Dämmstoff im Deich- und Kanalbau verwendet.Composites made of a nonwoven fabric and a flat structure of a defined yarn layer are already known per se. For example, DE-GM 71 33 997 shows a composite of a nonwoven made of crimped polyamide fibers and a needled lattice fabric made of continuous filaments, which are connected to one another by a waterproof binder. This composite material is used as an erosion-preventing insulation material in dyke and sewer construction.

Dagegen dient das erfindungsgemäß ausgebildete Geotextil zur Bewehrung von Asphaltschichten im Straßenbau. Wie sich gezeigt hat, besitzt das erfindungsgemäß ausgebildete Geo­textil eine überraschend hohe Widerstandsfähigkeit gegen Rißbildung und -fortpflanzung. Dies dürfte auf einer Kombi­nationswirkung zwischen den vorteilhaften Eigenschaften der beiden Komponenten des Verbundstoffes beruhen. Darüberhinaus besitzt das erfindungsgemäß ausgebildete Geotextil eine aus­gezeichnete Dichtungswirkung, die das Durchdringen von Wasser und somit auch von organischen und anorganischen Bestandteilen verhindert.In contrast, the geotextile designed according to the invention serves to reinforce asphalt layers in road construction. As has been shown, the geotextile designed according to the invention has a surprisingly high resistance to crack formation and propagation. This should be based on a combination effect between the advantageous properties of the two components of the composite. In addition, the geotextile designed according to the invention has an excellent sealing effect, which prevents the penetration of water and thus also of organic and inorganic constituents.

Vorzugsweise ist der Verbundstoff als Raschelware ausge­bildet, bei der die beiden Komponenten des Verbundstoffes durch Schußlegerascheltechnik verbunden sind. Hierbei han­delt es sich um eine Kettenwirktechnik, bei der der Vlies­stoff richtungsorientiert durch Garne, vorzugsweise hoch­feste Garne verstärkt ist. Diese Kettenwirktechnik wird auf sogenannten Raschelmaschinen durchgeführt. Eine besonders geeignete Raschelmaschine zur Herstellung eines erfindungs­gemäß ausgebildeten Verbundstoffes ist die RS 3 MSU-V der Firma Karl Mayer, Textilmaschinenfabrik GmbH, Obertshausen. Bei der in Schußlegetechnik hergestellten Raschelware mit Vlieseinlage ergibt sich ein besonders fester Verbund zwischen den beiden Komponenten des Verbundstoffes.The composite material is preferably in the form of a Raschel fabric, in which the two components of the composite material are connected by weft-laying technology. This is a warp knitting technique in which the nonwoven is reinforced in a direction-oriented manner by yarns, preferably high-strength yarns. This warp knitting technique is carried out on so-called Raschel machines. A particularly suitable Raschel machine for producing a composite material designed according to the invention is the RS 3 MSU-V from Karl Mayer, Textilmaschinenfabrik GmbH, Obertshausen. The Raschel fabric with fleece insert, which is manufactured using the weft-laying technique, results in a particularly strong bond between the two components of the composite.

Gute Ergebnisse ergeben sich aber auch, wenn die beiden Kom­ponenten des Verbundstoffes durch Nadeln, Kleben oder Nähen miteinander verbunden sind. Der Verbund der beiden Komponen­ten muß gewährleisten, daß keine Schwächung des Geotextils durch eine Delaminierung des Verbundstoffes entsteht.Good results also result if the two components of the composite are connected to one another by needling, gluing or sewing. The combination of the two components must ensure that the geotextile is not weakened by delamination of the composite.

Der Vliesstoff kann aus Polypropylen, Polyethylen, Polyamid, Polyacrylnitril oder anderen geeigneten Rohstoffen herge­stellt werden; bevorzugt sind jedoch Polyester, insbesondere Polyethylenterephthalat, wegen ihrer hohen Temperaturbe­ständigkeit.The nonwoven fabric can be made from polypropylene, polyethylene, polyamide, polyacrylonitrile or other suitable raw materials; however, polyesters, in particular polyethylene terephthalate, are preferred because of their high temperature resistance.

Der Vliesstoff ist vorzugsweise als Spinnvlies aus Endlos­filamenten ausgebildet, d.h. er ist ein sogenanntes Spun­bond. Der Vliesstoff kann mechanisch, thermisch oder chemisch verfestigt sein; bevorzugt wird eine mechanische Verfestigung wegen der Flexibilität und der Bitumensaug­fähigkeit eines derartigen Vliesstoffes. Das Flächengewicht des Vliesstoffes liegt vorzugsweise im Bereich von 50 bis 300 g/cm², vorzugsweise zwischen 100 und 180 g/ m².The nonwoven fabric is preferably formed as a spunbonded fabric from continuous filaments, i.e. it is a so-called spunbond. The nonwoven can be mechanically, thermally or chemically consolidated; mechanical strengthening is preferred because of the flexibility and bitumen absorbency of such a nonwoven. The weight per unit area of the nonwoven is preferably in the range from 50 to 300 g / cm², preferably between 100 and 180 g / m².

Die Auswahl des Rohstoffs für die zweite Komponente des Ver­bundstoffes, also etwa für das Gewebe, ist ähnlich wie beim Vliesstoff. Besonders bevorzugt werden beide Komponenten des Verbundstoffes aus dem gleichen Rohstoff hergestellt, also insbesondere aus Polyestern, unabhängig davon, ob der Ver­bundstoff ein Gewebe, Gelege, Gitter oder Gewirke enthält oder als Raschelware ausgebildet ist. Das Flächengewicht der zweiten Komponente des Verbundstoffes liegt vorzugsweise im Bereich von 100 bis 500 g/m². Die Höchstzugkraft der zwei­ten Komponente des Verbundstoffes soll bei 10 bis 200 kN/m liegen, vorzugsweise über 25 kN/m (wobei unter Höchstzug­kraft die Höchstzugkraft eines Flächengebildes von 1m Breite zu verstehen ist). Die Bruchdehnung liegt vorzugsweise im Bereich zwischen 5 und 35%, vorzugsweise zwischen 10 und 20%.The selection of the raw material for the second component of the composite, for example for the fabric, is similar to that of the nonwoven. Both components of the composite are particularly preferably produced from the same raw material, that is to say in particular from polyesters, irrespective of whether the composite contains a fabric, scrim, grid or knitted fabric or is designed as a Raschel fabric. The weight per unit area of the second component of the composite is preferably in the range from 100 to 500 g / m 2. The maximum tensile force of the second component of the composite should be 10 to 200 kN / m, preferably above 25 kN / m (whereby the maximum tensile force is to be understood as the maximum tensile force of a fabric of 1 m width). The elongation at break is preferably in the range between 5 and 35%, preferably between 10 and 20%.

Falls der Verbundstoff als Raschelware mit Vliesstoffeinlage ausgebildet ist, kann man die Höchstzugkraft der zweiten Komponente des Verbundstoffes der Höchstzugkraft des Ver­bundstoffes selbst gleichsetzen, da der Vliesstoff, insbe­sondere aufgrund seiner hohen Dehnung, keinen nennenswerten Beitrag zur Höchstzugkraft leistet.If the composite is designed as a Raschel fabric with a nonwoven insert, the maximum tensile strength of the second component of the composite can be equated to the maximum tensile strength of the composite itself, since the nonwoven fabric, particularly due to its high elongation, makes no significant contribution to the maximum tensile strength.

Der Verbund zwischen dem Geotextil und den beiden Asphalt­schichten wird durch ein Haftmittel, z.B. reines Bitumen, erreicht. Bei Verwendung von anderen Haftmitteln ist die endgültige Haftmittelmenge vorher zu ermitteln. Die Haftmit­telmenge muß mindestens dem Porengehalt des Verbundstoffes entsprechen, wobei ein Abwandern in die beschädigte Schicht mitzuberücksichtigen ist. Im Specification Guide for Paving Fabrics der TASK FORCE 25 sind die entsprechenden Anforde­rungen zusammengefaßt.The bond between the geotextile and the two asphalt layers is made by an adhesive, e.g. pure bitumen, achieved. When using other adhesives, the final amount of adhesive must be determined beforehand. The amount of adhesive must correspond at least to the pore content of the composite, taking into account migration into the damaged layer. The corresponding requirements are summarized in the TASK FORCE 25 Specification Guide for Paving Fabrics.

Bei einer besonders bevorzugten Ausführungsform besteht der Vliesstoff aus einem Trevira-Spunbond, in das durch Schuß­legerascheltechnik Trevira-Hochfestgarne integriert sind oder das durch Nähen mit einem Gewebe aus Trevira-Hochfest­garnen verbunden ist.In a particularly preferred embodiment, the nonwoven fabric consists of a Trevira spunbond, in which Trevira high-strength yarns are integrated by weft-laying technique or which is connected by sewing to a fabric made of Trevira high-strength yarns.

Wie bereits erwähnt, besitzt der erfindungsgemäß ausgebil­dete Verbundstoff eine besonders hohe Widerstandsfähigkeit gegen Rißbildung und -weiterleitung. Hierbei sorgt die Vlieskomponente für einen optimalen Verbund zwischen dem Asphalt und dem Geotextil; sie verhindert auch ein Durch­dringen von Wasser und bildet einen Puffer, der Kräfte durch die Risse absorbiert. Zweckmäßigerweise wird der Verbund­stoff so eingesetzt, daß der Vliesstoff auf der Unterseite liegt.As already mentioned, the composite material designed according to the invention has a particularly high resistance to crack formation and propagation. The fleece component ensures an optimal bond between the asphalt and the geotextile; it also prevents water from penetrating and forms a buffer that absorbs forces through the cracks. The composite is expediently used in such a way that the nonwoven lies on the underside.

Bei größeren Rissen, die insbesondere durch Abbrüche von Anbauten und/oder Bodensetzungen, Frosthebungen oder sonstige Belastungen bedingt sind, erfolgt die Kraftaufnahme vor allem durch die hochfeste zweite Komponente des Verbund­stoffes.In the case of larger cracks, which are due in particular to the demolition of attachments and / or subsidence, frost elevations or other loads, the force is primarily absorbed by the high-strength second component of the composite.

Claims (12)

1. Geotextil für die Bewehrung von Asphaltschichten im Straßenbau, dadurch gekennzeichnet, daß es ein aus zwei Komponenten bestehender Verbundstoff ist, dessen eine Kompo­nente ein Vliesstoff und dessen zweite Komponente ein Ge­webe, Gewirke, Fadengelege, Grid oder anderes Flächengebilde definierter Garnlage ist.1. Geotextile for the reinforcement of asphalt layers in road construction, characterized in that it is a two-component composite material, one component of which is a nonwoven fabric and the second component of which is a woven, knitted fabric, laid scrim, grid or other flat structure of a defined layer of yarn. 2. Geotextil nach Anspruch 1, dadurch gekennzeichnet, daß der Verbundstoff als Raschelware ausgebildet ist, bei der die beiden Komponenten durch Schußlegerascheltechnik ineinander integriert sind.2. Geotextile according to claim 1, characterized in that the composite material is designed as a Raschelware, in which the two components are integrated into one another by weft-laying technique. 3. Geotextil nach Anspruch 1,dadurch gekennzeichnet, daß die beiden Komponenten des Verbundstoffes durch Nadeln, Kleben oder Nähen miteinander verbunden sind.3. Geotextile according to claim 1, characterized in that the two components of the composite are connected to one another by needling, gluing or sewing. 4. Geotextil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die zweite Komponente des Verbundstoffes aus hochfesten Garnen besteht.4. Geotextile according to at least one of the preceding claims, characterized in that the second component of the composite consists of high-strength yarns. 5. Geotextil nach mindestens einem der vorherge­henden Ansprüche, dadurch gekennzeichnet, daß der Vliesstoff als Spinnvlies aus Endlosfilamenten (Spunbond) ausgebildet ist.5. Geotextile according to at least one of the preceding claims, characterized in that the nonwoven fabric is formed as a spunbonded fabric from continuous filaments (spunbond). 6. Geotextil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Vliesstoff aus Polyester, insbesondere Polyethylenterephthalat, besteht.6. Geotextile according to at least one of the preceding claims, characterized in that the nonwoven fabric consists of polyester, in particular polyethylene terephthalate. 7. Geotextil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die beiden Komponen­ten des Verbundstoffes aus dem gleichen Rohstoff bestehen.7. Geotextile according to at least one of the preceding claims, characterized in that the two components of the composite consist of the same raw material. 8. Geotextil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Vliesstoff mecha­nisch verfestigt ist.8. Geotextile according to at least one of the preceding claims, characterized in that the nonwoven fabric is mechanically consolidated. 9. Geotextil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Flächengewicht des Vliesstoffes im Bereich zwischen 50 und 300g/cm², vor­zugsweise zwischen 100 und 180 g/ m² liegt.9. Geotextile according to at least one of the preceding claims, characterized in that the basis weight of the nonwoven fabric is in the range between 50 and 300g / cm², preferably between 100 and 180 g / m². 10. Geotextil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Flächengewicht der zweiten Komponente des Verbundstoffes im Bereich zwischen 100 und 500 g/ m² liegt.10. Geotextile according to at least one of the preceding claims, characterized in that the basis weight of the second component of the composite is in the range between 100 and 500 g / m². 11. Geotextil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Höchstzugkraft der zweiten Komponente des Verbundstoffes im Bereich zwi­schen 10 und 200 kN/m, vorzugsweise zwischen 25 und 200 kN/m liegt.11. Geotextile according to at least one of the preceding claims, characterized in that the maximum tensile force of the second component of the composite is in the range between 10 and 200 kN / m, preferably between 25 and 200 kN / m. 12. Geotextil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Bruchdehnung der zweiten Komponente des Verbundstoffes im Bereich zwischen 5 und 35%, vorzugsweise zwischen 10 und 20%, liegt.12. Geotextile according to at least one of the preceding claims, characterized in that the elongation at break of the second component of the composite is in the range between 5 and 35%, preferably between 10 and 20%.
EP90115547A 1989-08-16 1990-08-14 Geotextile for the reinforcement of asphalt-layers Withdrawn EP0413295A1 (en)

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DE3926991 1989-08-16
DE3926991A DE3926991A1 (en) 1989-08-16 1989-08-16 GEOTEXTIL FOR REINFORCING ASPHALT LAYERS

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0572891A1 (en) * 1992-05-30 1993-12-08 Hoechst Aktiengesellschaft Non-woven sheet and saim
EP0656254A1 (en) * 1993-11-06 1995-06-07 Hoechst Aktiengesellschaft Textile composite material, method for its manufacture and use
FR2713253A3 (en) * 1993-12-02 1995-06-09 Chomarat & Cie Material complex for reinforcing bitumen roads
FR2716905A1 (en) * 1994-03-03 1995-09-08 Chomarat & Cie Process for making a composite material for reinforcing tarmac roads
WO1998027282A1 (en) * 1996-12-17 1998-06-25 Huesker Synthetic Gmbh & Co. Textile netting for reinforcing layers connected by bitumen
FR2767543A1 (en) * 1997-08-25 1999-02-26 6D Solutions Grid type framework, used on roads
BG64730B1 (en) * 2003-12-30 2006-01-31 Иван КАЛЧЕВ Reinforced water impermeable civil engineering product
US7059800B2 (en) 2001-02-28 2006-06-13 Owens Corning Fiberglas Technology, Inc. Method of reinforcing and waterproofing a paved surface
EP1693517A2 (en) 2005-02-22 2006-08-23 REHAU AG + Co Reinforcement layer system
US7207744B2 (en) 2001-02-28 2007-04-24 Owens Corning Fiberglas Technology, Inc. Mats for use in paved surfaces
RU2540178C1 (en) * 2013-07-17 2015-02-10 Геннадий Витальевич Котишевский Geogrid for road surfaces and method of its manufacturing
CN104612014A (en) * 2015-01-12 2015-05-13 青海富腾生态科技有限公司 Asphalt pavement crack-preventing base fabric construction method
RU203346U1 (en) * 2020-10-21 2021-04-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Саратовский государственный технический университет имени Гагарина Ю.А." (СГТУ имени Гагарина Ю.А.) Reinforcing polymer-composite mesh

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4340174C2 (en) * 1993-11-25 2000-06-21 Saechsisches Textilforsch Inst Multi-layer, voluminous geotextile
DE10008431A1 (en) * 2000-02-23 2001-09-20 Oekologische Bausysteme B I Mo Sheet material used e.g. under tiles and in wall construction and based on plastic mesh, is penetrated transversely by fibers
DE10138000B4 (en) * 2001-08-02 2005-12-22 Sächsisches Textilforschungsinstitut e.V. Use of a foil nonwoven fabric as geotextile
DE102005054235A1 (en) * 2005-11-14 2007-05-24 FITR-Gesellschaft für Innovation im Tief- und Rohrleitungsbau Weimar mbH Joint-less circulation surface forming method for use during manufacturing concrete floor, involves applying and hardening fresh concrete in fixed mat, and providing connection of concrete layer with mat by form of mat
FR2907132B1 (en) * 2006-10-17 2010-02-26 Mdb Texinov Sa COMPOSITE GEOTEXTILE FOR CIVIL ENGINEERING AND METHOD FOR MANUFACTURING THE SAME

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2639840A1 (en) * 1975-09-08 1977-03-17 Efes Bv LAMINATE-LIKE TEXTILE PRODUCT, INCLUDING A WOVEN TEXTILE MATERIAL AND A NON-WOVEN TEXTILE MATERIAL ASSOCIATED WITH THIS, AS WELL AS ANY WHOLE OR PART OF SUCH TEXTILE PRODUCT
DE2621592A1 (en) * 1976-05-14 1977-11-17 Bayerische Wollfilzfabriken Kg Three-ply sandwich textile - comprises two independent outer net plies with interposed needled nonwoven fabric core
DE2648716A1 (en) * 1976-10-27 1978-05-03 Claus Kolckmann CARPET INTERLAYER
US4472086A (en) * 1981-02-26 1984-09-18 Burlington Industries Inc. Geotextile fabric construction
US4540311A (en) * 1981-02-26 1985-09-10 Burlington Industries, Inc. Geotextile fabric construction
EP0176847A2 (en) * 1984-09-28 1986-04-09 Hoechst Aktiengesellschaft Multilayered fabric
DE3642586A1 (en) * 1985-12-26 1987-07-02 Rhone Poulenc Fibres METHOD AND MEANS FOR THE PROTECTION OF SURFACE COVERINGS FROM ROADS AND GEOTEXTILE INTERMEDIATE LAYER THEREFOR

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2639840A1 (en) * 1975-09-08 1977-03-17 Efes Bv LAMINATE-LIKE TEXTILE PRODUCT, INCLUDING A WOVEN TEXTILE MATERIAL AND A NON-WOVEN TEXTILE MATERIAL ASSOCIATED WITH THIS, AS WELL AS ANY WHOLE OR PART OF SUCH TEXTILE PRODUCT
DE2621592A1 (en) * 1976-05-14 1977-11-17 Bayerische Wollfilzfabriken Kg Three-ply sandwich textile - comprises two independent outer net plies with interposed needled nonwoven fabric core
DE2648716A1 (en) * 1976-10-27 1978-05-03 Claus Kolckmann CARPET INTERLAYER
US4472086A (en) * 1981-02-26 1984-09-18 Burlington Industries Inc. Geotextile fabric construction
US4540311A (en) * 1981-02-26 1985-09-10 Burlington Industries, Inc. Geotextile fabric construction
EP0176847A2 (en) * 1984-09-28 1986-04-09 Hoechst Aktiengesellschaft Multilayered fabric
DE3435643A1 (en) * 1984-09-28 1986-04-10 Hoechst Ag, 6230 Frankfurt LAMINATE
DE3642586A1 (en) * 1985-12-26 1987-07-02 Rhone Poulenc Fibres METHOD AND MEANS FOR THE PROTECTION OF SURFACE COVERINGS FROM ROADS AND GEOTEXTILE INTERMEDIATE LAYER THEREFOR

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6235657B1 (en) 1992-05-30 2001-05-22 Johns Manville International, Inc. Laminate with web and laid components
EP0572891A1 (en) * 1992-05-30 1993-12-08 Hoechst Aktiengesellschaft Non-woven sheet and saim
EP0656254A1 (en) * 1993-11-06 1995-06-07 Hoechst Aktiengesellschaft Textile composite material, method for its manufacture and use
US5612114A (en) * 1993-11-06 1997-03-18 Hoechst Aktiengesellschaft Textile composite, production thereof and use thereof
FR2713253A3 (en) * 1993-12-02 1995-06-09 Chomarat & Cie Material complex for reinforcing bitumen roads
FR2716905A1 (en) * 1994-03-03 1995-09-08 Chomarat & Cie Process for making a composite material for reinforcing tarmac roads
EP1158098A1 (en) 1996-12-17 2001-11-28 Huesker Synthetic GmbH & Co. Textile mesh for reinforcing bituminous layers
EP1318240A3 (en) * 1996-12-17 2003-08-13 Huesker Synthetic GmbH Textile mesh for reinforcing bituminous layers
AU724371B2 (en) * 1996-12-17 2000-09-21 Huesker Synthetic Gmbh Textile lattice for reinforcing bitumen-bonded layers
EP1318240A2 (en) 1996-12-17 2003-06-11 Huesker Synthetic GmbH Textile mesh for reinforcing bituminous layers
WO1998027282A1 (en) * 1996-12-17 1998-06-25 Huesker Synthetic Gmbh & Co. Textile netting for reinforcing layers connected by bitumen
US6503853B1 (en) 1996-12-17 2003-01-07 Huesker Synthetic Gmbh & Co. Textile netting for reinforcing layers connected by bitumen
FR2767543A1 (en) * 1997-08-25 1999-02-26 6D Solutions Grid type framework, used on roads
WO1999010600A1 (en) * 1997-08-25 1999-03-04 6D Solutions Grid-type reinforcement for strengthening road structures, in particular made of bitumen
US7059800B2 (en) 2001-02-28 2006-06-13 Owens Corning Fiberglas Technology, Inc. Method of reinforcing and waterproofing a paved surface
US7207744B2 (en) 2001-02-28 2007-04-24 Owens Corning Fiberglas Technology, Inc. Mats for use in paved surfaces
BG64730B1 (en) * 2003-12-30 2006-01-31 Иван КАЛЧЕВ Reinforced water impermeable civil engineering product
EP1693517A2 (en) 2005-02-22 2006-08-23 REHAU AG + Co Reinforcement layer system
RU2540178C1 (en) * 2013-07-17 2015-02-10 Геннадий Витальевич Котишевский Geogrid for road surfaces and method of its manufacturing
CN104612014A (en) * 2015-01-12 2015-05-13 青海富腾生态科技有限公司 Asphalt pavement crack-preventing base fabric construction method
RU203346U1 (en) * 2020-10-21 2021-04-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Саратовский государственный технический университет имени Гагарина Ю.А." (СГТУ имени Гагарина Ю.А.) Reinforcing polymer-composite mesh

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IE902957A1 (en) 1991-02-27
PT94995A (en) 1991-04-18
DE3926991A1 (en) 1991-02-28

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