WO2001064599A1 - Fibre-reinforced concrete - Google Patents

Fibre-reinforced concrete Download PDF

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Publication number
WO2001064599A1
WO2001064599A1 PCT/AT2001/000054 AT0100054W WO0164599A1 WO 2001064599 A1 WO2001064599 A1 WO 2001064599A1 AT 0100054 W AT0100054 W AT 0100054W WO 0164599 A1 WO0164599 A1 WO 0164599A1
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WIPO (PCT)
Prior art keywords
fiber
fibers
reinforced concrete
section
cross
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PCT/AT2001/000054
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German (de)
French (fr)
Inventor
Hermann Stangl
Original Assignee
Dr. Hochegger Kommunikations-Beratung Ges.M.B.H.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AT3102000A external-priority patent/ATA3102000A/en
Application filed by Dr. Hochegger Kommunikations-Beratung Ges.M.B.H. filed Critical Dr. Hochegger Kommunikations-Beratung Ges.M.B.H.
Priority to AU35232/01A priority Critical patent/AU3523201A/en
Publication of WO2001064599A1 publication Critical patent/WO2001064599A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/38—Fibrous materials; Whiskers
    • C04B14/42—Glass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/022—Agglomerated materials, e.g. artificial aggregates agglomerated by an organic binder

Definitions

  • the invention relates to the reinforcement of concrete by fibers, in particular glass fibers.
  • Glass fiber reinforced concrete is known per se and is used above all where the laying of reinforcing steel (reinforcement travels) is not possible due to space or other reasons.
  • the glass fibers In the case of glass fiber reinforced concrete, the glass fibers should be distributed as homogeneously as possible in the concrete, and the orientation of the individual fibers cannot really be influenced. In practice, unfortunately, it is often the case that large clumps of glass fibers that are hooked together hang together so stably that areas with too high a glass fiber concentration and areas with a far too low glass fiber concentration are present side by side. This tendency to knead the glass fibers together is further intensified and aggravated by the mostly rolling mixing movement of the concrete when it is turned on.
  • Another disadvantage is that the concrete does not adhere very well to the individual glass fibers, and therefore the pull-out force of the glass fibers, which is an essential parameter for the strength of the concrete part produced, is far too low to obtain high-quality or heavy-duty concrete.
  • the invention now provides for the use of fiber rods, in particular glass fiber rods, in which the individual fibers are bonded or embedded in thermosetting resin systems such as polyester, vinyl ester, acrylic or epoxy resin or also in thermoplastic materials such as in particular polypropylene and related compounds available.
  • Such fiber rods are available on the market as glass fiber rods in diameters of 0.1 mm, whereby these fibers, often rolled or wound, can be regarded as being virtually infinitely long.
  • the fibers are cut to a length between 20 and 60 mm, in special cases also above or below, a special feature being that the aim is not to make the cut as smooth as possible, but rather that the fiber bundles are squeezed rather than cut. This leads to a deformation of the at the intersection or crushing point Cross section of the fiber rod, which can degenerate into proper fraying or ovalizing or flattening.
  • the smooth surface of the outer jacket of the fibers integrated into the plastic matrix does not result in the notorious and undesirable agglomeration, but rather these glass fiber rod pieces are actually evenly and homogeneously distributed in the concrete.
  • the pull-out strength of the individual reinforcing elements, the glass fiber rod sections is, however, significantly higher than that of the individually present glass fibers according to the prior art, which should be due above all to the fact that the squeezed or cut ends of the individual glass fiber rod pieces are positively held by the surrounding concrete , so that the adhesive properties of the concrete on the shell surfaces of the glass fiber rod pieces are practically meaningless.
  • the invention can be modified in various ways.
  • glass fibers other fibers (Kevlar, carbon fibers, etc.) can also be used in a corresponding plastic matrix, although the glass fibers or the glass fiber rods are preferred for reasons of cost and processing.
  • the plastic forming the matrix does not have to be selected from the above-mentioned group, but this is preferred because then commercially available and therefore very inexpensive and uniform quality pre-products can be used.
  • the production can be carried out from the continuous material by squeezing and then cutting in the squeezing area, a large number of glass fiber rods preferably being provided closely adjacent to one another in order to achieve a usable production rate. It is possible to process several hundred fiberglass rods together simultaneously.
  • the squeezing can be done by a kind of blunt sword or in another way, the cutting preferably by a coarse saw, which leads to a proper fibering of the ends.
  • the end faces of the fiber rods and possibly the adjacent jacket areas are not or not completely surrounded by the plastic of the matrix, but this does not matter for the uniform distribution or for the pull-out strength or durability of the fiber rods or the concrete surrounding them.
  • fiber rod end means not only the immediate end region (cutting region), but also any axial region that is not “in the middle”, as an approximation one can say that it is not in the middle third of the fiber rod length.
  • the different cross-section it is not necessary for the different cross-section to be present over the entire end region, but it is to be understood that the different cross-section is present at some point in the end region.
  • both end regions of a fiber rod it is not necessary for both end regions of a fiber rod to be provided with a cross section which deviates from a cross section which is axially spaced therefrom, although this is also preferred. Due to the large number of fiber rods per unit volume and their completely disordered position (in all three dimensions), the desired strength is achieved even with fiber rods according to the invention with only one side.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Nonwoven Fabrics (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

The invention relates to fibre-reinforced concrete, especially glass fibre-reinforced concrete. The invention is characterised in that the fibres are in the form of fibre bundles which are embedded in a plastic matrix and in that the cross-section of the axial end areas of said fibre bundles differs from the cross-section of an axial area of the fibre bundles. The invention also relates to embodiments and fibres.

Description

Faserverstärkter Beton Fiber reinforced concrete
Die Erfindung betrifft die Verstärkung von Beton durch Fasern, insbesondere Glasfasern. Glasfaserverstärkter Beton ist an sich bekannt und wird vor allem überall dort eingesetzt, wo die Verlegung von Armierstahl (Bewehreisen) aus Platzgründen oder anderen Gründen nicht möglich ist.The invention relates to the reinforcement of concrete by fibers, in particular glass fibers. Glass fiber reinforced concrete is known per se and is used above all where the laying of reinforcing steel (reinforcement travels) is not possible due to space or other reasons.
Beim glasfaserverstärkten Beton sollen die Glasfasern möglichst homogen im Beton verteilt vorliegen, wobei die Orientierung der einzelnen Fasern nicht wirklich beeinflußt werden kann. In der Praxis ist es leider oft so, daß große Knäuel der untereinander verhakten Glasfasern so stabil aneinander hängen, daß Bereiche mit zu hoher Glasfaserkonzentration und Bereiche mit bei weitem zu niedriger Glasfaserkonzentration nebeneinander vorliegen. Diese Tendenz zum Zusammenknäueln der Glasfasern untereinander wird durch die zumeist rollende Mischbewegung des Betons bei dessen Anmachen noch weiter verstärkt und verschärft.In the case of glass fiber reinforced concrete, the glass fibers should be distributed as homogeneously as possible in the concrete, and the orientation of the individual fibers cannot really be influenced. In practice, unfortunately, it is often the case that large clumps of glass fibers that are hooked together hang together so stably that areas with too high a glass fiber concentration and areas with a far too low glass fiber concentration are present side by side. This tendency to knead the glass fibers together is further intensified and aggravated by the mostly rolling mixing movement of the concrete when it is turned on.
Ein anderer Nachteil ist, daß der Beton nicht sehr gut an den einzelnen Glasfasern haftet und daß daher die Auszugskraft der Glasfasern, die ein wesentlicher Kennwert für die Festigkeit des hergestellten Betonteils ist, viel zu gering ist, um hochwertigen bzw. hochbelastbaren Beton zu erhalten.Another disadvantage is that the concrete does not adhere very well to the individual glass fibers, and therefore the pull-out force of the glass fibers, which is an essential parameter for the strength of the concrete part produced, is far too low to obtain high-quality or heavy-duty concrete.
Die Erfindung sieht nun vor, als Armierung Faserstäbe, insbesondere Glasfaserstäbe zu verwenden, bei denen die einzelnen Fasern in duroplastischen Harzsystemen wie Polyester-, Vinylester-, Akryl- bzw. Epoxydharz oder auch in thermoplastischen Kunststoffen wie insbesondere Polypropylen und verwandten Verbindungen gebunden bzw. eingebettet vorliegen. Derartige Faserstäbe sind als Glasfaserstäbe in Durchmessern von 0,1 mm aufwärts am Markt erhältlich, wobei diese Fasern oft gerollt oder gewickelt als quasi unendlich lang angesehen werden können. Zur erfindungsgemäßen Verwendung werden die Fasern auf eine Länge zwischen 20 und 60 mm, in Sonderfällen auch darüber oder darunter, geschnitten, wobei eine Besonderheit darin liegt, daß kein möglichst glatter Schnitt angestrebt wird, sondern daß die Faserbündel eher gequetscht als geschnitten werden. Dadurch kommt es an der Schnitt- oder Quetschstelle zu einer Deformation des Querschnittes des Faserstabes, die in ein richtiges Ausfransen oder Ovalisieren bzw. Flachdrücken ausarten kann.The invention now provides for the use of fiber rods, in particular glass fiber rods, in which the individual fibers are bonded or embedded in thermosetting resin systems such as polyester, vinyl ester, acrylic or epoxy resin or also in thermoplastic materials such as in particular polypropylene and related compounds available. Such fiber rods are available on the market as glass fiber rods in diameters of 0.1 mm, whereby these fibers, often rolled or wound, can be regarded as being virtually infinitely long. For the use according to the invention, the fibers are cut to a length between 20 and 60 mm, in special cases also above or below, a special feature being that the aim is not to make the cut as smooth as possible, but rather that the fiber bundles are squeezed rather than cut. This leads to a deformation of the at the intersection or crushing point Cross section of the fiber rod, which can degenerate into proper fraying or ovalizing or flattening.
Wenn derartige Faserstabstücke dem Beton beim Mischen zugegeben werden, kommt es zufolge der glatten Oberfläche des Außenmantels der zumindest zum größten Teil ihrer Mantelfläche in der Kunststoffrnatrix eingebundenen Fasern nicht zum berüchtigten und unerwünschten Zusammenballen, sondern es verteilen sich diese Glasfaserstabstücke tatsächlich gleichmäßig und homogen im Beton. Überraschenderweise ist die Auszugsfestigkeit der einzelnen Armierungselemente, der Glasfaserstabschnitte, aber wesentlich höher als bei den einzeln vorliegenden Glasfasern gemäß dem Stand der Technik, was vor allem darauf zurückzuführen sein dürfte, daß die abgequetschten oder abgeschnittenen Enden der einzelnen Glasfaserstabstücke formschlüssig vom sie umgebenden Beton festgehalten werden, sodaß die Hafteigenschaften des Betons an den Manteloberflächen der Glasfaserstabstücke praktisch bedeutungslos sind.When such fiber rod pieces are added to the concrete during mixing, the smooth surface of the outer jacket of the fibers integrated into the plastic matrix, at least for the most part of its outer surface, does not result in the notorious and undesirable agglomeration, but rather these glass fiber rod pieces are actually evenly and homogeneously distributed in the concrete. Surprisingly, the pull-out strength of the individual reinforcing elements, the glass fiber rod sections, is, however, significantly higher than that of the individually present glass fibers according to the prior art, which should be due above all to the fact that the squeezed or cut ends of the individual glass fiber rod pieces are positively held by the surrounding concrete , so that the adhesive properties of the concrete on the shell surfaces of the glass fiber rod pieces are practically meaningless.
Die Erfindung kann verschiedentlich abgewandelt werden. So können statt Glasfasern auch andere Fasern (Kevlar, Kohlefasern, etc.) in einer entsprechenden Kunststoffmatrix verwendet werden, wenn auch aus Kosten- und Verarbeitungsgründen die Glasfasern bzw. die Glasfaserstäbe bevorzugt werden. Der die Matrix bildende Kunststoff muß nicht aus der oben genannten Gruppe gewählt sein, dies wird aber, weil dann handelsübliche und damit sehr kostengünstige und gleichmäßige Qualität aufweisende Vorprodukte verwenden werden können, bevorzugt.The invention can be modified in various ways. Instead of glass fibers, other fibers (Kevlar, carbon fibers, etc.) can also be used in a corresponding plastic matrix, although the glass fibers or the glass fiber rods are preferred for reasons of cost and processing. The plastic forming the matrix does not have to be selected from the above-mentioned group, but this is preferred because then commercially available and therefore very inexpensive and uniform quality pre-products can be used.
Die Herstellung kann aus dem Endlosmaterial durch Plattquetschen und anschließendes Schneiden im Quetschbereich erfolgen, wobei bevorzugt eine große Anzahl von Glasfaserstäben parallel zueinander eng benachbart vorgesehen werden, um zu einer brauchbaren Herstellungsrate zu kommen. Dabei ist es möglich, mehrere Hundert Glasfaserstäbe gemeinsam simultan zu Verarbeiten. Das Quetschen kann durch eine Art stumpfes Schwert oder auf andere Weise erfolgen, das Schneiden bevorzugt durch eine grobe Säge, die zu einer richtiggehenden Auffaserung der Enden führt.The production can be carried out from the continuous material by squeezing and then cutting in the squeezing area, a large number of glass fiber rods preferably being provided closely adjacent to one another in order to achieve a usable production rate. It is possible to process several hundred fiberglass rods together simultaneously. The squeezing can be done by a kind of blunt sword or in another way, the cutting preferably by a coarse saw, which leads to a proper fibering of the ends.
Man erreicht aber schon hervorragende Resultate im Vergleich zum Stand der Technik, wenn man ohne Quetschen mit einer groben Säge sägt. Bei der Verwendung reicht zufolge der Härte des umgebenden Betons schon ein geringes Abweichen des Querschnittes am Faserstabende vom ungestörten Querschnitt im restlichen axialen Bereich des Faserstabes, um zu einer hohen Auszugfestigkeit und damit zu erstaunlichen Festigkeitswerten des fertigen Gegenstandes zu kommen.But you can achieve excellent results compared to the state of the art if you saw with a rough saw without squeezing. According to use enough the hardness of the surrounding concrete already shows a slight deviation of the cross-section at the end of the fiber rod from the undisturbed cross-section in the remaining axial area of the fiber rod in order to achieve a high pull-out strength and thus to astonishing strength values of the finished object.
Durch die beschriebene Herstellung sind die Endflächen der Faserstäbe und eventuell die angrenzenden Mantelbereiche nicht bzw. nicht vollständig vom Kunststoff der Matrix umgeben, doch spielt dies weder für die gleichmäßige Verteilung noch für die Auszugsfestigkeit oder Haltbarkeit der Faserstäbe oder des sie umgebenden Betons eine Rolle.As a result of the production described, the end faces of the fiber rods and possibly the adjacent jacket areas are not or not completely surrounded by the plastic of the matrix, but this does not matter for the uniform distribution or for the pull-out strength or durability of the fiber rods or the concrete surrounding them.
Der Begriff „Faserstabende" bedeutet in der vorliegenden Beschreibung und den Ansprüchen nicht nur den unmittelbaren Endbereich (Schnittbereich), sondern jeden axialen Bereich, der sich nicht „mittig" befindet, als Näherung kann man sagen, sich nicht im mittleren Drittel der Faserstablänge befindet. Dabei ist es natürlich nicht notwendig, dass der unterschiedliche Querschnitt über den gesamten Endbereich vorliegt, sondern es ist so zu verstehen, dass der unterschiedliche Querschnitt an irgendeiner Stelle im Endbereich vorliegt.In the present description and the claims, the term “fiber rod end” means not only the immediate end region (cutting region), but also any axial region that is not “in the middle”, as an approximation one can say that it is not in the middle third of the fiber rod length. Of course, it is not necessary for the different cross-section to be present over the entire end region, but it is to be understood that the different cross-section is present at some point in the end region.
Es ist nicht notwendig, dass beide Endbereiche eines Faserstabes mit einem Querschnitt versehen sind, der von einem Querschnitt, der axialen Abstand davon aufweist, abweicht, wenn dies auch bevorzugt wird. Durch die große Anzahl von Faserstäben pro Volumenseinheit und deren völlig ungeordnete Lage (in allen drei Dimensionen) wird die angestrebte Festigkeit auch bei nur einseitig erfindungsgemäßen Faserstäben erreicht. It is not necessary for both end regions of a fiber rod to be provided with a cross section which deviates from a cross section which is axially spaced therefrom, although this is also preferred. Due to the large number of fiber rods per unit volume and their completely disordered position (in all three dimensions), the desired strength is achieved even with fiber rods according to the invention with only one side.

Claims

Patentansprüche: claims:
1. Faserverstärkter, insbesondere glasfaserverstärkter, Beton, dadurch gekennzeichnet, daß die Fasern in Form von Faserbündeln, die zumindest über den größten Teil ihrer Mantelfläche in eine Matrix aus Kunststoff eingebettet sind, vorliegen und daß zumindest ein axialer Endbereich der Faserbündel einen Querschnitt aufweist, der vom Querschnitt eines Abstand vom Endbereich aufweisenden axialen Bereiches der Faserbündel abweicht.1. Fiber reinforced, in particular glass fiber reinforced, concrete, characterized in that the fibers are in the form of fiber bundles, which are embedded at least over the largest part of their outer surface in a matrix of plastic, and that at least one axial end region of the fiber bundle has a cross section that deviates from the cross-section of a distance from the axial region of the fiber bundle having the end region.
2. Faserverstärkter Beton nach Anspruch 1, dadurch gekennzeichnet, daß die Faserbündel einen Durchmesser zwischen 0,5 mm und 2,5 mm aufweisen.2. Fiber reinforced concrete according to claim 1, characterized in that the fiber bundles have a diameter between 0.5 mm and 2.5 mm.
3. Faserverstärkter Beton nach Anspruch 1, dadurch gekennzeichnet, daß die Faserbündel eine Länge zwischen 15 mm und 100 mm aufweisen.3. Fiber-reinforced concrete according to claim 1, characterized in that the fiber bundles have a length between 15 mm and 100 mm.
4. Faserverstärkter Beton nach Anspruch 2 und 3, dadurch gekennzeichnet, daß die Faserbündel eine Länge zwischen 20 mm und 60 mm und einen Durchmesser zwischen 1,0 mm und 2,0 mm aufweisen.4. Fiber reinforced concrete according to claim 2 and 3, characterized in that the fiber bundles have a length between 20 mm and 60 mm and a diameter between 1.0 mm and 2.0 mm.
5. Faserverstärkter Beton nach Anspruch 1, dadurch gekennzeichnet, daß die Fasern Glasfasern mit mindestens 800 tex sind.5. Fiber-reinforced concrete according to claim 1, characterized in that the fibers are glass fibers with at least 800 tex.
6. Faserverstärkter Beton nach Anspruch 1, dadurch gekennzeichnet, daß die Fasern in einer Matrix aus einem duroplastischen Harzsystem wie Polyester-, Vinylester-, Akryl- bzw. Epoxydharz gebunden sind.6. Fiber-reinforced concrete according to claim 1, characterized in that the fibers are bound in a matrix of a thermosetting resin system such as polyester, vinyl ester, acrylic or epoxy resin.
7. Faserverstärkter Beton nach Anspruch 1, dadurch gekennzeichnet, daß die Fasern in einer Matrix aus einem thermoplastischen Kunststoff, insbesondere in Polypropylen, gebunden sind.7. Fiber-reinforced concrete according to claim 1, characterized in that the fibers are bound in a matrix made of a thermoplastic, in particular in polypropylene.
8. Verstärkungsfasern, insbesondere Glasfasern, zur Verstärkung von Beton, dadurch gekennzeichnet, daß die Fasern in Form von Faserbündeln, die zumindest über den größten Teil ihrer Mantelfläche in eine Matrix aus Kunststoff eingebettet sind, vorliegen und daß zumindest ein axialer Endbereich der Faserbündel einen Querschnitt aufweist, der vom Querschnitt eines Abstand vom Endbereich aufweisenden axialen Bereiches der Faserbündel abweicht.8. Reinforcing fibers, in particular glass fibers, for reinforcing concrete, characterized in that the fibers are in the form of fiber bundles which are embedded at least over the major part of their outer surface in a plastic matrix, and that at least one axial end region of the fiber bundles has a cross section has that of Cross section of a distance from the end region having axial region of the fiber bundle deviates.
9. Verstärkungsfasern nach Anspruch 8, dadurch gekennzeichnet, dass jeder der beiden axialen Endbereiche etwa ein Drittel der Länge des Faserbündels aufweist. 9. Reinforcing fibers according to claim 8, characterized in that each of the two axial end regions has approximately one third of the length of the fiber bundle.
PCT/AT2001/000054 2000-02-28 2001-02-27 Fibre-reinforced concrete WO2001064599A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU35232/01A AU3523201A (en) 2000-02-28 2001-02-27 Fibre-reinforced concrete

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT3102000A ATA3102000A (en) 2000-02-28 2000-02-28 FIBER REINFORCED CONCRETE
ATA310/2000 2000-02-28
ATA1741/2000 2000-10-12
AT17412000A AT408753B (en) 2000-02-28 2000-10-12 FIBER REINFORCED CONCRETE

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WO2001064599A1 true WO2001064599A1 (en) 2001-09-07

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AU (1) AU3523201A (en)
WO (1) WO2001064599A1 (en)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
US6780367B2 (en) 2000-06-28 2004-08-24 Dow Global Technologies Inc. Method for preparing a concrete article having reinforcing fibers frayed at their ends
ITNA20080050A1 (en) * 2008-08-08 2010-02-09 Ing Domenico Brigante REINFORCED FIBER CEMENT MATERIAL FOR STRUCTURAL AND NON-STRUCTURAL APPLICATIONS.
CZ302633B6 (en) * 2008-12-29 2011-08-10 Centrum dopravního výzkumu, v. v. i. Capsules of fiber and glue for fiber-reinforced concrete, method of preparing capsules with a reinforcing fiber embedded in capsule of glue and process for preparing fiber-reinforced concrete by making use of such capsules
EP2372034A1 (en) 2010-12-16 2011-10-05 Centrum Dopravního Vyzkumu, V.v.i. Device for coiling fibres and for the production of capsules made of a coiled fibre and a wrapping of glue or frozen water
CZ302761B6 (en) * 2008-12-29 2011-10-26 Centrum dopravního výzkumu, v. v. i. Method of preparing capsules with frozen water coated reinforcing fiber and process for preparing fiber-reinforced concrete by making use of such capsules

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US4560411A (en) * 1983-05-20 1985-12-24 Bm Chemie Kunststoff Gmbh Aggregate for concrete or mortar
JPH01290545A (en) * 1988-05-16 1989-11-22 Kumagai Gumi Co Ltd Production of cement-based reinforced hardened body
NL8901214A (en) * 1989-05-16 1990-12-17 Bekaert Sa Nv Reinforcing agent for incorporation into concrete - comprising bundles of steel wire cuttings bound with a meltable water-insoluble binder
DE19713918A1 (en) * 1997-04-04 1998-10-08 Meyer Rohr & Schacht Gmbh Concrete based composite material for the relining of waste water pipes

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6780367B2 (en) 2000-06-28 2004-08-24 Dow Global Technologies Inc. Method for preparing a concrete article having reinforcing fibers frayed at their ends
ITNA20080050A1 (en) * 2008-08-08 2010-02-09 Ing Domenico Brigante REINFORCED FIBER CEMENT MATERIAL FOR STRUCTURAL AND NON-STRUCTURAL APPLICATIONS.
CZ302633B6 (en) * 2008-12-29 2011-08-10 Centrum dopravního výzkumu, v. v. i. Capsules of fiber and glue for fiber-reinforced concrete, method of preparing capsules with a reinforcing fiber embedded in capsule of glue and process for preparing fiber-reinforced concrete by making use of such capsules
CZ302761B6 (en) * 2008-12-29 2011-10-26 Centrum dopravního výzkumu, v. v. i. Method of preparing capsules with frozen water coated reinforcing fiber and process for preparing fiber-reinforced concrete by making use of such capsules
EP2372034A1 (en) 2010-12-16 2011-10-05 Centrum Dopravního Vyzkumu, V.v.i. Device for coiling fibres and for the production of capsules made of a coiled fibre and a wrapping of glue or frozen water

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ATA17412000A (en) 2001-07-15
AU3523201A (en) 2001-09-12

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