EP0098825B1 - Fibres for the reinforcement of mouldable materials with a hydraulic or other bonding agent, and their manufacture - Google Patents

Fibres for the reinforcement of mouldable materials with a hydraulic or other bonding agent, and their manufacture Download PDF

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Publication number
EP0098825B1
EP0098825B1 EP83870069A EP83870069A EP0098825B1 EP 0098825 B1 EP0098825 B1 EP 0098825B1 EP 83870069 A EP83870069 A EP 83870069A EP 83870069 A EP83870069 A EP 83870069A EP 0098825 B1 EP0098825 B1 EP 0098825B1
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EP
European Patent Office
Prior art keywords
fiber
fibers
reinforcement
matrix
head
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Expired
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EP83870069A
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German (de)
French (fr)
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EP0098825A1 (en
Inventor
Xavier Pierre Destree
Angelo Antonio Lazzari
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Eurosteel SA
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Eurosteel SA
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Priority claimed from BE0/208508A external-priority patent/BE893726A/en
Application filed by Eurosteel SA filed Critical Eurosteel SA
Priority to AT83870069T priority Critical patent/ATE25727T1/en
Publication of EP0098825A1 publication Critical patent/EP0098825A1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/012—Discrete reinforcing elements, e.g. fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
    • B21G3/00—Making pins, nails, or the like
    • B21G3/12—Upsetting; Forming heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
    • B21G3/00—Making pins, nails, or the like
    • B21G3/18—Making pins, nails, or the like by operations not restricted to one of the groups B21G3/12 - B21G3/16
    • B21G3/30—Making pins, nails, or the like by operations not restricted to one of the groups B21G3/12 - B21G3/16 by rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete

Definitions

  • the present invention relates to a reinforcing fiber of the kind described in the preamble of the claim.
  • This behavior depends on the effect of the fibrous reinforcement in the matrix in the vicinity of a crack appeared following the brittleness of the matrix, the crack having been caused by an exceeding of the tensile stress of rupture due to dimensional variations ( thermal, hygrometric) or to bending or tensile stresses.
  • fiber reinforcement provides an increase in the breaking energy of the composite material compared to the brittle matrix material.
  • the increase in energy required for breaking corresponds to the energy required for lengthening and breaking the fibrous reinforcement.
  • the presence of hooks at the ends makes it possible to attach the fiber to the matrix.
  • the behavior of the fiber depends on the behavior of the hooks in the matrix.
  • the unfolding energy is again much lower than the breaking energy by traction of the fiber; the number of undulations along a fiber does not compensate for the too large radius of curvature of each undulation.
  • Straight smooth fibers comprising in their length flattened parts which can also be located at their ends.
  • the matrix can be sheared by the flattened parts; this results in a harmful loosening.
  • GB-A-1 446 855 also discloses fibers whose filiform body has undulations and whose two ends each have a head either flattened or thickened at the head of the nail but without symmetry of revolution.
  • Reinforcement fibers comprising a straight filiform body and at each end a spherical head are, on the other hand, known from patent FR-A-2 370 839. None of these previously known fibers is entirely satisfactory. Either the anchoring is insufficient or the fiber breaks at the point of transition between a head and the filiform body or the matrix shears.
  • the breaking energy of the composite material would be that of the fragile matrix, increased by that of the fibrous reinforcement.
  • the reinforcing fiber has the characteristics defined in the characterizing part of the claim.
  • the value of the angle between the tangent at any point of the generating curve and the axis of the filiform body depends to obtain the ideal behavior, on the nature of the material constituting the fiber.
  • steel for increasingly low mechanical qualities requires increasingly high head angles and for increasingly high mechanical qualities requires increasingly low head angles.
  • the filiform elements called “fibers described above can be manufactured by the use of several methods.
  • a filiform element of indefinite length with a diameter equal to the largest transverse dimension of the head is subjected, by passage between a pair of grooved rolling cylinders, the grooves of which are provided with notches spaced from one another. , a reduction in diameter over its entire length except that heads are formed at the locations of the notches cut along the grooves of the rolling rolls.
  • the next step in this process is to regularly cut the continuous filamentary element laminated so as to produce fibers of precise length provided at each end with a head.
  • Another method is carried out by striking a hammer on each end of a filiform element, without a head, having a diameter equal to that of the body of the fiber, each end being maintained during striking by a matrix so as to obtain a head of desired shape.
  • a third process is carried out by forming a drop at the ends of the filiform body at a temperature close to the melting point of the constituent material. After this forming, it can be quenched to improve the mechanical qualities of the fiber.
  • the wound wire generally designated by the reference notation 1 is drawn towards a rolling apparatus 2 consisting of a pair of fluted rolling cylinders regularly provided over their length with matrix slots of the fiber heads, of which FIGS. 7 and 8 give an example so as to reduce the diameter of the wire as a base material up to the diameter of the filiform body of the fiber except for. the location of the heads of these fibers.
  • This laminating device 2 provides a wire 3 of diameter smaller than the initial diameter and provided with regular spacing of swellings 7 the shearing device 4 cuts the wire thus obtained at half the volume of each swelling to create the fibers 5 provided with their heads 8.
  • the coiled wire generally designated by la.notation of reference 1 is pulled towards a shearing apparatus producing straight filiform elements 6 of short constant length to be gripped individually, pinched at their ends between two dies, as in Figure 9, generating with the help of hammers striking heads 8 desired in their exact form.
  • the fiber 5 comprises a filiform body 6 and at each end thereof a head 8 of larger diameter. At least the inner part of the head, that is to say, the part of the latter in contact with the filiform body 6, has the shape of a solid of revolution defined by a generating curve.
  • the tangent at any point of this short generatrix forms with the longitudinal axis of the filiform body 6 an angle a whose value is between 0 ° and 60 °.
  • the intersection of said tangent with said axis is always in the same volume of said inner part of the head.
  • Figure 10 shows some possible values of a as a function of the point of contact of the tangent with the generating curve.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Ropes Or Cables (AREA)
  • Moulding By Coating Moulds (AREA)
  • Reinforced Plastic Materials (AREA)
  • Nonwoven Fabrics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

Reinforcement of a moldable material by means of fibers comprised of a filiform body provided at each of each ends with an anchoring device consisting of one or a plurality of volumes of any shapes and of which all cross-section dimensions are larger than the diameter of the filiform body.

Description

La présente invention est relative à une fibre de renforcement du genre décrit dans le préambule de la revendication.The present invention relates to a reinforcing fiber of the kind described in the preamble of the claim.

En ce qui concerne le renforcement des matériaux moulables à liant hydraulique, la technique du renforcement du béton par fibres métalliques, éléments filiformes de courte longueur en acier par exemple, est actuellement d'utilisation courante ; les propriétés du béton renforcé par ces fibres sont désormais bien connues et plusieurs types de fibres de provenances différentes destinées à des applications bien spécifiques sont actuellement disponibles.With regard to the reinforcement of moldable materials with a hydraulic binder, the technique of reinforcing concrete with metal fibers, filiform elements of short length in steel for example, is currently in common use; the properties of concrete reinforced with these fibers are now well known and several types of fibers from different sources intended for very specific applications are currently available.

Ces différents types de fibres sont caractérisa- bles par leur effet de renforcement sur le matériau composite, effet provoqué par leurs caractéristiques géométriques et mécaniques.These different types of fibers can be characterized by their reinforcing effect on the composite material, an effect caused by their geometric and mechanical characteristics.

De manière à pouvoir objectivement comparer plusieurs types différents de fibres, il est utile de rappeler le comportement et le processus de renforcement d'un matériau composite à matrice fragile, renforcé par des fibres en matériau ductile.In order to be able to objectively compare several different types of fibers, it is useful to recall the behavior and the reinforcement process of a composite material with a brittle matrix, reinforced by fibers of ductile material.

Ce comportement dépend de l'effet du renfort fibreux dans la matrice au voisinage d'une fissure apparue suite à la fragilité de la matrice, la fissure ayant été provoquée par un dépassement de la contrainte°de traction de rupture dû à des variations dimensionnelles (thermiques, hygrométriques) ou à des sollicitations de flexion ou traction.This behavior depends on the effect of the fibrous reinforcement in the matrix in the vicinity of a crack appeared following the brittleness of the matrix, the crack having been caused by an exceeding of the tensile stress of rupture due to dimensional variations ( thermal, hygrometric) or to bending or tensile stresses.

Idéalement, le renforcement par fibres apporte un accroissement d'énergie de rupture du matériau composite par rapport au matériau matrice fragile. L'accroissement d'énergie nécessaire à la rupture correspond à l'énergie nécessaire à l'allongement et à la rupture du renfort fibreux. Cette explication de l'intervention du renfort fibreux fait bien comprendre la nécessité de réaliser une solidarisation parfaite entre les fibres ductiles et la matrice fragile.Ideally, fiber reinforcement provides an increase in the breaking energy of the composite material compared to the brittle matrix material. The increase in energy required for breaking corresponds to the energy required for lengthening and breaking the fibrous reinforcement. This explanation of the intervention of the fibrous reinforcement makes it clear the need to achieve a perfect connection between the ductile fibers and the fragile matrix.

Par application de ces principes, il est facile de caractériser les différents types de fibres disponibles actuellement, connues et représentées sur les figures 1 à 5.By applying these principles, it is easy to characterize the different types of fibers currently available, known and represented in FIGS. 1 to 5.

Les fibres longues et droites représentées en figure 1.The long, straight fibers shown in Figure 1.

Seules les tensions d'adhérence régnant le long de l'interface fibre-matrice peuvent provoquer un ancrage de la fibre dans la matrice.Only the adhesion tensions prevailing along the fiber-matrix interface can cause the fiber to anchor in the matrix.

On montre que pour pouvoir solliciter la fibre en traction jusqu'à atteindre une tension de traction voisine de la rupture de celle-ci, il faudrait que son diamètre soit au moins 200 fois plus petit que sa longueur, pour des raisons pratiques de mise en oeuvre, il est exclu d'utiliser des fibres qui auraient une telle caractéristique géométrique.It is shown that in order to be able to urge the fiber in tension until reaching a tensile tension close to the breaking of the latter, its diameter would have to be at least 200 times smaller than its length, for practical reasons of implementation. work, it is excluded to use fibers which would have such a geometric characteristic.

Les fibres longues munies de crochets en leurs extrémités.Long fibers with hooks at their ends.

Trois types différents déjà connus sont représentés en figure 2.Three different types already known are shown in Figure 2.

La présence de crochets aux extrémités permet de réaliser un accrochage de la fibre à la matrice. Le comportement de la fibre dépend de la tenue des crochets dans la matrice.The presence of hooks at the ends makes it possible to attach the fiber to the matrix. The behavior of the fiber depends on the behavior of the hooks in the matrix.

On constate expérimentalement que quelle que soit la géométrie des crochets (nombre de courbures opposées, rayon de courbure), l'énergie nécessaire à les déplier est toujours plus faible que l'énergie de rupture par traction de la fibre ; il s'ensuit que souvent les fibres munies de crochets ne sont pas amenées dans un état voisin de la rupture dans une fissure de la matrice mais sont déchaussées par dépliage des crochets.It has been found experimentally that whatever the geometry of the hooks (number of opposite curvatures, radius of curvature), the energy necessary to unfold them is always lower than the energy of rupture by traction of the fiber; it follows that often the fibers provided with hooks are not brought into a state close to rupture in a crack in the matrix but are released by unfolding the hooks.

Comme conclusion, on admet que les crochets aux extrémités, s'ils améliorent considérablement la tenue du matériau composite, ne sont pas suffisants pour obtenir le comportement idéal.As a conclusion, it is accepted that the hooks at the ends, if they considerably improve the behavior of the composite material, are not sufficient to obtain the ideal behavior.

Les fibres connues munies d'ondulations sinusoïdales réparties sur toute leur longueur.Known fibers provided with sinusoidal undulations distributed over their entire length.

Dans ce cas, l'énergie de dépliage est à nouveau bien inférieure à l'énergie de rupture par traction de la fibre ; le nombre d'ondulations le long d'une fibre ne compense pas le trop grand rayon de courbure de chaque ondulation.In this case, the unfolding energy is again much lower than the breaking energy by traction of the fiber; the number of undulations along a fiber does not compensate for the too large radius of curvature of each undulation.

Ces fibres sont représentées en figure 3.These fibers are shown in Figure 3.

Les fibres lisses droites comprenant dans leur longueur des parties aplaties pouvant également être localisées en leurs extrémités.Straight smooth fibers comprising in their length flattened parts which can also be located at their ends.

Ces fibres connues sont représentées sur la figure 4.These known fibers are shown in FIG. 4.

Dans ce cas, l'accrochage réalisé sans les pliages induisant des pertes de raideur, est limité dans ses performances parce qu'il est trop agressif pour la matrice.In this case, the attachment carried out without the folds inducing stiffness losses, is limited in its performance because it is too aggressive for the matrix.

En effet, comme il est constaté expérimentalement lorsque la fibre est soumise à un effort de traction, la matrice peut être cisaillée par les parties aplaties ; il en résulte un déchaussement néfaste.Indeed, as it is experimentally observed when the fiber is subjected to a tensile force, the matrix can be sheared by the flattened parts; this results in a harmful loosening.

Les fibres rugueuses droites ou non.Rough fibers, straight or not.

Ces fibres connues sont représentées sur la figure 5.These known fibers are shown in FIG. 5.

Dans ce cas, la rugosité et/ou les courbures sont insuffisantes pour réaliser un accrochage.In this case, the roughness and / or the curvatures are insufficient to achieve a hooking.

Le brevet GB-A-1 446 855 divulgue par ailleurs des fibres dont le corps filiforme présente des ondulations et dont les deux extrémités comportent chacune une tête soit aplatie soit épaissie en tête de clou mais sans symétrie de révolution.GB-A-1 446 855 also discloses fibers whose filiform body has undulations and whose two ends each have a head either flattened or thickened at the head of the nail but without symmetry of revolution.

Des fibres de renforcement comportant un corps filiforme droit et à chaque extrémité une tête sphérique sont, d'autre part, connues par le brevet FR-A-2 370 839. Aucune de ces fibres antérieurement connues ne donne entière satisfaction. Ou bien l'ancrage est insuffisant ou bien la fibre se rompt à l'endroit de transition entre une tête et le corps filiforme ou encore la matrice se cisaille.Reinforcement fibers comprising a straight filiform body and at each end a spherical head are, on the other hand, known from patent FR-A-2 370 839. None of these previously known fibers is entirely satisfactory. Either the anchoring is insufficient or the fiber breaks at the point of transition between a head and the filiform body or the matrix shears.

La comparaison raisonnée des différentes fibres disponibles actuellement aide à bien comprendre le problème posé :

  • Concevoir une fibre s'accrochant parfaitement à la matrice c'est-à-dire ne se déchaussant jamais ni du fait de la fibre elle-même, ni du fait d'une rupture de la matrice au voisinage du moyen d'ancrage.
The reasoned comparison of the various fibers currently available helps to understand the problem posed:
  • Design a fiber that clings perfectly to the matrix, that is to say, never takes off either because of the fiber itself, or because of a rupture of the matrix in the vicinity of the anchoring means.

Avec un tel type de fibre, l'énergie de rupture du matériau composite serait celle de la matrice fragile, augmentée de celle du renfort fibreux.With such a type of fiber, the breaking energy of the composite material would be that of the fragile matrix, increased by that of the fibrous reinforcement.

La présente invention vise à réaliser une fibre du genre décrit dans le 1.6 = GB-A-1 446 855 ou le FR-A-2370839 conformément au préambule de la revendication, destinée à renforcer un matériau-matrice, le béton par exemple, en ne se déchaussant jamais hors de celui-ci, ni du fait de la fibre elle-même, ni du fait de la matrice par rupture de celle-ci, au voisinage de l'ancrage.The present invention aims to produce a fiber of the kind described in 1.6 = GB-A-1 446 855 or FR-A-2370839 in accordance with the preamble of the claim, intended to reinforce a matrix material, concrete for example, by never taking off outside of it, neither due to the fiber itself, nor due to the matrix by breaking thereof, in the vicinity of the anchor.

A cet effet, la fibre de renforcement présente les caractéristiques définies dans la partie carac- térisante de la revendication.To this end, the reinforcing fiber has the characteristics defined in the characterizing part of the claim.

La valeur de l'angle entre la tangente en tout point de la courbe génératrice et l'axe du corps filiforme, dépend pour obtenir le comportement idéal, de la nature du matériau constituant la fibre.The value of the angle between the tangent at any point of the generating curve and the axis of the filiform body, depends to obtain the ideal behavior, on the nature of the material constituting the fiber.

Comme exemple, l'acier pour des qualités mécaniques de plus en plus faibles exige des angles de tête de plus en plus élevés et pour des qualités mécaniques de plus en plus élevées exige des angles de tête de plus en plus faibles.As an example, steel for increasingly low mechanical qualities requires increasingly high head angles and for increasingly high mechanical qualities requires increasingly low head angles.

Les éléments filiformes appelés «fibres décrits ci-avant peuvent se fabriquer par l'utilisation de plusieurs procédés.The filiform elements called “fibers described above can be manufactured by the use of several methods.

En effet, suivant un procédé, un élément filiforme de longueur indéfinie de diamètre égal à la plus grande dimension transversale de tête subit, par passage entre un couple de cylindres de laminage rainurés, dont les rainures sont pourvues d'encoches espacées les unes des autres, une réduction de diamètre sur toute sa longueur sauf que des têtes se forment aux emplacements des encoches taillées le long des rainures des cylindres de laminage..In fact, according to a method, a filiform element of indefinite length with a diameter equal to the largest transverse dimension of the head is subjected, by passage between a pair of grooved rolling cylinders, the grooves of which are provided with notches spaced from one another. , a reduction in diameter over its entire length except that heads are formed at the locations of the notches cut along the grooves of the rolling rolls.

L'étape suivante de ce procédé consiste à couper régulièrement l'élément filiforme continu laminé de manière à produire des fibres de longueur précise munies à chaque extrémité d'une tête.The next step in this process is to regularly cut the continuous filamentary element laminated so as to produce fibers of precise length provided at each end with a head.

Un autre procédé se réalise par frappe d'un marteau sur chaque extrémité d'un élément filiforme, sans tête, ayant un diamètre égal à celui du corps de la fibre, chaque extrémité étant maintenue lors de la frappe par une matrice de manière à obtenir une tête de forme souhaitée.Another method is carried out by striking a hammer on each end of a filiform element, without a head, having a diameter equal to that of the body of the fiber, each end being maintained during striking by a matrix so as to obtain a head of desired shape.

Un troisième procédé se réalise par formation d'une goutte aux extrémités du corps filiforme à une température voisine du point de fusion de la matière constituante. Après ce formage, il peut succéder une trempe pour améliorer les qualités mécaniques de la fibre.A third process is carried out by forming a drop at the ends of the filiform body at a temperature close to the melting point of the constituent material. After this forming, it can be quenched to improve the mechanical qualities of the fiber.

L'invention est maintenant décrite de manière plus détaillée en faisant référence aux dessins ci- annexés dans lesquels :The invention is now described in more detail with reference to the accompanying drawings in which:

les figures 1 à 5 représentent des fibres de formes déjà connues

  • les figures 6A et 6B représentent schématiquement un appareil utilisé pour faire la fibre suivant l'invention ;
  • la figure 7 représente le détail X de la figure 6A;
  • la figure 8 représente en vue frontale le couple de cylindres de la figure 6A ;
  • la figure 9 représente en coupe le détail Y de la figure 6B ;
  • la figure 10 représente en perspective quelques exemples de fibres conformes à l'invention obtenus à l'issue des procédés utilisés.
Figures 1 to 5 show fibers of shapes already known
  • Figures 6A and 6B schematically show an apparatus used for making the fiber according to the invention;
  • FIG. 7 represents the detail X of FIG. 6A;
  • 8 shows in front view the pair of cylinders of Figure 6A;
  • Figure 9 shows in section the detail Y of Figure 6B;
  • FIG. 10 shows in perspective some examples of fibers in accordance with the invention obtained at the end of the processes used.

Dans ces différentes figures, les mêmes notations de référence désignent les mêmes éléments.In these different figures, the same reference notations designate the same elements.

Comme illustré en figure 6A, le fil bobiné désigné généralement par la notation de référence 1 est tiré vers un appareil de laminage 2 constitué d'un couple de cylindres de laminage à canelures pourvues régulièrement sur leur longueur d'encoches matrices des têtes de fibre dont les figures 7 et 8 donnent un exemple de manière à réduire le diamètre du fil comme matériau de base jusqu'au diamètre du corps filiforme de la fibre excepté à . l'endroit des têtes de ces fibres.As illustrated in FIG. 6A, the wound wire generally designated by the reference notation 1 is drawn towards a rolling apparatus 2 consisting of a pair of fluted rolling cylinders regularly provided over their length with matrix slots of the fiber heads, of which FIGS. 7 and 8 give an example so as to reduce the diameter of the wire as a base material up to the diameter of the filiform body of the fiber except for. the location of the heads of these fibers.

Cet appareil de laminage 2 fournit un fil 3 de diamètre inférieur au diamètre initial et muni à espacement régulier d'enflures 7 le dispositif 4 de cisaillage sectionne le fil ainsi obtenu à mi- volume de chaque enflure pour créer les fibres 5 munies de leurs têtes 8.This laminating device 2 provides a wire 3 of diameter smaller than the initial diameter and provided with regular spacing of swellings 7 the shearing device 4 cuts the wire thus obtained at half the volume of each swelling to create the fibers 5 provided with their heads 8.

Comme illustré en figure 6B selon une forme de réalisation préférée, le fil bobiné désigné généralement par la.notation de référence 1 est tiré vers un appareil de cisaillage produisant des éléments filiformes 6 droits de courte longueur constante devant être saisis individuellement, pincés à leurs extrémités entre deux matrices, comme en figure 9, engendrant avec l'aide des marteaux de frappe les têtes 8 désirées dans leur forme exacte. Comme représenté sur la figure 10 la fibre 5 comporte un corps filiforme 6 et à chaque extrémité de celui-ci une tête 8 de plus grand diamètre. Au moins la partie intérieure de la tête, c'est-à-dire, la partie de celle-ci en contact avec le corps filiforme 6, a la forme d'un solide de révolution défini par une courbe génératrice. La tangente en tout point de cette courte génératrice forme avec l'axe longitudinal du corps filiforme 6 un angle a dont la valeur est comprise entre 0° et 60°. L'intersection de ladite tangente avec ledit axe se trouve toujours dans le volume même de ladite partie intérieure de la tête.As illustrated in FIG. 6B according to a preferred embodiment, the coiled wire generally designated by la.notation of reference 1 is pulled towards a shearing apparatus producing straight filiform elements 6 of short constant length to be gripped individually, pinched at their ends between two dies, as in Figure 9, generating with the help of hammers striking heads 8 desired in their exact form. As shown in FIG. 10, the fiber 5 comprises a filiform body 6 and at each end thereof a head 8 of larger diameter. At least the inner part of the head, that is to say, the part of the latter in contact with the filiform body 6, has the shape of a solid of revolution defined by a generating curve. The tangent at any point of this short generatrix forms with the longitudinal axis of the filiform body 6 an angle a whose value is between 0 ° and 60 °. The intersection of said tangent with said axis is always in the same volume of said inner part of the head.

La figure 10 montre quelques valeurs possibles de a en fonction du point de contact de la tangente avec la courbe génératrice.Figure 10 shows some possible values of a as a function of the point of contact of the tangent with the generating curve.

Claims (1)

  1. Fiber for the reinforcement of a mouldable material such as concrete, said fiber (5) being made of steel and comprising a rectilinear filiform body (6) and at each end thereof a head (8) having at least one transverse dimension greater than the diameter of the filiform body (6), characterized in that at least the inner part of the head (8) i.e. that part in contact with the filiform body (6), is in the shape of a solid of revolution defined by a generating curve so that the angle (a) between the tangent at any point of the generating curve and the axis of the filiform body (6) has a value between 0° and 60°, the intersection of said tangent with said axis being always within the volume of said inner part of the head (8).
EP83870069A 1982-07-01 1983-06-30 Fibres for the reinforcement of mouldable materials with a hydraulic or other bonding agent, and their manufacture Expired EP0098825B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83870069T ATE25727T1 (en) 1982-07-01 1983-06-30 REINFORCEMENT FIBERS FOR PASTABLE BUILDING MATERIALS WITH HYDRAULIC OR OTHER BINDERS AND THEIR PRODUCTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE0/208508A BE893726A (en) 1982-07-01 1982-07-01 Fibres for reinforcing concrete - extend between mountings with transverse dimensions greater than fibre diameter
BE208508 1982-07-01

Publications (2)

Publication Number Publication Date
EP0098825A1 EP0098825A1 (en) 1984-01-18
EP0098825B1 true EP0098825B1 (en) 1987-03-04

Family

ID=3843542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83870069A Expired EP0098825B1 (en) 1982-07-01 1983-06-30 Fibres for the reinforcement of mouldable materials with a hydraulic or other bonding agent, and their manufacture

Country Status (6)

Country Link
EP (1) EP0098825B1 (en)
JP (1) JPS59501220A (en)
AT (1) ATE25727T1 (en)
DE (1) DE3370041D1 (en)
DK (1) DK152935C (en)
WO (1) WO1984000186A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8517152D0 (en) * 1985-07-05 1985-08-14 Vidal H Metal strip
DE3816930A1 (en) * 1988-05-11 1989-11-23 Heribert Hiendl REVERSIBLE CONCRETE STEEL
EP0326157B1 (en) * 1988-01-29 1993-12-08 Heribert Hiendl Concrete reinforcing steel bar able to be bent back
SU1679008A1 (en) * 1989-07-26 1991-09-23 Производственно Промышленное Объединение "Железобетон" Reinforcement member for continuously reinforcing concrete
FR2655035B1 (en) * 1989-11-30 1993-08-20 France Etat Ponts Chaussees DISCONTINUOUS FIBER IN STEEL WIRE AND FIBER COMPOSITE CONTAINING THE SAME.
IT1241027B (en) * 1990-09-12 1993-12-27 Ilm Tps S P A METAL FIBER FOR CONCRETE REINFORCEMENT AND EQUIPMENT FOR ITS MANUFACTURE.
BE1008191A3 (en) * 1991-11-29 1996-02-13 Eurosteel Sa Method for producing continuous roads or industrial areas made offibre-reinforced compact concrete
FR2684397B1 (en) * 1991-11-29 1997-04-25 Eurosteel Sa PROCESS FOR PRODUCING CONTINUOUS INDUSTRIAL PAVEMENTS OR AREAS IN FIBER REINFORCED COMPACTED CONCRETE.
DE9202767U1 (en) * 1992-03-02 1992-06-11 Weiß, Wolfgang, O-9273 Oberlungwitz Finite reinforcement element for reinforcing concrete parts, as well as device for its production
DE4226744A1 (en) * 1992-08-13 1994-02-17 Vulkan Harex Stahlfasertech Fiber for reinforcing concrete or the like from wire or flat ribbon and device for producing such fibers
FR2808522B1 (en) 2000-05-03 2003-01-10 Chaussees Tech Innovation FIBER REINFORCED COMPACT ROUND CONCRETE COMPOSITION AND METHOD FOR MAKING A PAVEMENT FROM SAID COMPOSITION
NL1016105C2 (en) * 2000-09-05 2002-03-07 Harex Nederland B V Fiber mixture for concrete.
EP1375773A3 (en) * 2002-06-05 2004-02-04 van Laer, Marcel Metal fibres for use in fibre-reinforced concrete
PL2144721T3 (en) 2007-05-04 2010-12-31 Stahl Karl Hermann Method for the production of a wire strip comprising a plurality of wires arranged parallel to each other and wire strip produced according to said method
DE102008034250A1 (en) 2008-07-23 2010-01-28 Karl-Hermann Stahl Process for the production of steel fibers
DE102011112037A1 (en) * 2011-08-31 2013-02-28 Hacanoka Gmbh Anchor metal pin

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE237185C (en) *
FR497840A (en) * 1918-04-27 1919-12-18 Domenico Calderoni Cutlery manufacturing process
US2518029A (en) * 1943-12-20 1950-08-08 Western Electric Co Article forming apparatus
GB772103A (en) * 1954-08-20 1957-04-10 Franz Koehler Method for forming heads on the ends of steel rods
DE1202461B (en) * 1960-06-14 1965-10-07 Friedrich Meissner Reinforcing bar with thickened ends for building structures made of hardening cast compounds
FR1382336A (en) * 1963-11-08 1964-12-18 Anchoring device for a steel cable subjected to dynamic forces
US3684474A (en) * 1970-11-12 1972-08-15 Dow Chemical Co Conveying and forming methods and apparatus for fibers having bulbous ends
GB1446855A (en) * 1972-08-16 1976-08-18 Gkn Somerset Wire Ltd Metal reinforcing elements
FR2370839A1 (en) * 1976-11-12 1978-06-09 Michelin & Cie SHORT METAL WIRES FOR REINFORCING MATERIALS

Also Published As

Publication number Publication date
DK152935C (en) 1988-10-24
JPS59501220A (en) 1984-07-12
DE3370041D1 (en) 1987-04-09
DK101484A (en) 1984-02-24
WO1984000186A1 (en) 1984-01-19
EP0098825A1 (en) 1984-01-18
JPH0326266B2 (en) 1991-04-10
DK152935B (en) 1988-05-30
ATE25727T1 (en) 1987-03-15
DK101484D0 (en) 1984-02-24

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