EP0098825B1 - Fibres de renforcement de matériaux moulables à liant hydraulique ou non et leur fabrication - Google Patents

Fibres de renforcement de matériaux moulables à liant hydraulique ou non et leur fabrication 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
Authority
EP
European Patent Office
Prior art keywords
fiber
fibers
reinforcement
matrix
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83870069A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0098825A1 (fr
Inventor
Xavier Pierre Destree
Angelo Antonio Lazzari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eurosteel SA
Original Assignee
Eurosteel SA
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 BE0/208508A external-priority patent/BE893726A/fr
Application filed by Eurosteel SA filed Critical Eurosteel SA
Priority to AT83870069T priority Critical patent/ATE25727T1/de
Publication of EP0098825A1 publication Critical patent/EP0098825A1/fr
Application granted granted Critical
Publication of EP0098825B1 publication Critical patent/EP0098825B1/fr
Expired legal-status Critical Current

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Classifications

    • 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.

Landscapes

  • 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)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Nonwoven Fabrics (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Reinforced Plastic Materials (AREA)
EP83870069A 1982-07-01 1983-06-30 Fibres de renforcement de matériaux moulables à liant hydraulique ou non et leur fabrication Expired EP0098825B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83870069T ATE25727T1 (de) 1982-07-01 1983-06-30 Armierungsfasern fuer giessfaehige baustoffe mit hydraulischem oder sonstigem bindemittel und ihre herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE0/208508A BE893726A (fr) 1982-07-01 1982-07-01 Fibres de renforcement de materiaux moulables a liant hydraulique ou non et leur fabrication.
BE208508 1982-07-01

Publications (2)

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

Family

ID=3843542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83870069A Expired EP0098825B1 (fr) 1982-07-01 1983-06-30 Fibres de renforcement de matériaux moulables à liant hydraulique ou non et leur fabrication

Country Status (6)

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

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
DE58906325D1 (de) * 1988-01-29 1994-01-20 Heribert Hiendl Rückbiegefähiger Betonstahl.
DE3816930A1 (de) * 1988-05-11 1989-11-23 Heribert Hiendl Rueckbiegefaehiger betonstahl
SU1679008A1 (ru) * 1989-07-26 1991-09-23 Производственно Промышленное Объединение "Железобетон" Арматурный элемент дл дисперсного армировани бетона
FR2655035B1 (fr) * 1989-11-30 1993-08-20 France Etat Ponts Chaussees Fibre discontinue en acier trefile et composite fibre contenant ladite fibre.
IT1241027B (it) * 1990-09-12 1993-12-27 Ilm Tps S P A Fibra metallica per il rinforzo di calcestruzzo ed apparecchiatura per la sua fabbricazione.
FR2684397B1 (fr) * 1991-11-29 1997-04-25 Eurosteel Sa Procede de realisation de chaussees ou aires industrielles continues en beton compacte renforce de fibres.
BE1008191A3 (fr) * 1991-11-29 1996-02-13 Eurosteel Sa Procede de realisation de chaussees ou aires industrielles continues en beton compacte renforce de fibres.
DE9202767U1 (de) * 1992-03-02 1992-06-11 Weiß, Wolfgang, O-9273 Oberlungwitz Endliches Bewehrungselement zur Bewehrung von Betonteilen, sowie Vorrichtung zu dessen Herstellung
DE4226744A1 (de) * 1992-08-13 1994-02-17 Vulkan Harex Stahlfasertech Faser zur Bewehrung von Beton oder dergleichen aus Draht oder Flachband und Einrichtung zum Herstellen solcher Fasern
FR2808522B1 (fr) 2000-05-03 2003-01-10 Chaussees Tech Innovation Composition de beton roule compacte renforce de fibres et procede de realisation d'une chaussee a partir de ladite composition
NL1016105C2 (nl) * 2000-09-05 2002-03-07 Harex Nederland B V Vezelmengsel voor beton.
EP1375773A3 (en) * 2002-06-05 2004-02-04 van Laer, Marcel Metal fibres for use in fibre-reinforced concrete
CA2685998C (en) 2007-05-04 2012-06-05 Karl-Hermann Stahl A method of making a strip comprising a plurality of wires arranged parallel to each other, and a strip made according to the method
DE102008034250A1 (de) 2008-07-23 2010-01-28 Karl-Hermann Stahl Verfahren zur Herstellung von Stahlfasern
DE102011112037A1 (de) * 2011-08-31 2013-02-28 Hacanoka Gmbh Ankermetallstift

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE237185C (da) *
FR497840A (fr) * 1918-04-27 1919-12-18 Domenico Calderoni Procédé de fabrication des couverts
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 (de) * 1960-06-14 1965-10-07 Friedrich Meissner Bewehrungsstab mit verdickten Enden fuer aus erhaertenden Gussmassen bestehende Baukoerper
FR1382336A (fr) * 1963-11-08 1964-12-18 Dispositif d'ancrage pour un câble d'acier soumis à des efforts dynamiques
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 (fr) * 1976-11-12 1978-06-09 Michelin & Cie Fils metalliques courts pour renforcer des materiaux

Also Published As

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

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