EP1282751B1 - Fibres d'acier - Google Patents

Fibres d'acier Download PDF

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Publication number
EP1282751B1
EP1282751B1 EP01947278A EP01947278A EP1282751B1 EP 1282751 B1 EP1282751 B1 EP 1282751B1 EP 01947278 A EP01947278 A EP 01947278A EP 01947278 A EP01947278 A EP 01947278A EP 1282751 B1 EP1282751 B1 EP 1282751B1
Authority
EP
European Patent Office
Prior art keywords
wire
section
wire fibre
concrete
fiber
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.)
Revoked
Application number
EP01947278A
Other languages
German (de)
English (en)
Other versions
EP1282751A1 (fr
Inventor
René Pepin
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.)
ArcelorMittal Bissen and Bettembourg SA
Original Assignee
Trefilarbed Bissen 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19731904&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1282751(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Trefilarbed Bissen SA filed Critical Trefilarbed Bissen SA
Publication of EP1282751A1 publication Critical patent/EP1282751A1/fr
Application granted granted Critical
Publication of EP1282751B1 publication Critical patent/EP1282751B1/fr
Anticipated expiration legal-status Critical
Revoked 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

Definitions

  • the invention relates to a rod-shaped wire fiber made of metal for use for the reinforcement of moldable materials, in particular concrete.
  • steel fibers used as reinforcing elements For concrete, which will also be understood below as screed and mortar, i.a. Steel fibers used as reinforcing elements.
  • a concrete reinforced with steel fibers is improved in its properties, for example, tensile strength, breaking strength, shear strength, stretchability, toughness, dynamic strength, fatigue strength. It is therefore used more and more.
  • the steel fiber should have the following properties: It should be tough and firm. When mixing with concrete or aggregates it should not break. It should not be too short or too thick, otherwise it will be insufficient in its strength. It should not be too long or too thin, otherwise it is difficult to process and tends to form spherical cement lumps - also called hedgehogs.
  • a steel fiber cross section of 0.1 to 1.4 mm 2 In general, a steel fiber cross section of 0.1 to 1.4 mm 2, a steel fiber length of 10 to 70 mm and a weight fraction of steel fibers of 15 to 150 kg / m 3 concrete are recommended. In addition to their properties, the cost-effective production of steel fibers is the top condition.
  • Wire fibers made of steel for reinforcing concrete have long been known, in different configurations in rod form, uniform over the length corrugated shape, chip shape or surface profiling, such as in the magazine "Beton, 1989, No. 4, page 178 to 180 by Gerd Humert "Steel Wire Fibers in Practice".
  • wire fibers are corrugated uniformly over their length, as well as in the Dutch Offenlegungsschrift 8001609 a evenly distributed over their length alternately stepwise stepped (right angle waved) wire fiber.
  • wire fibers are proposed, which either have a uniformly profiled surface in the longitudinal direction or be deformed in its entirety from the bar shape into other configurations, such as S-shape, O-shape, triangular shape, loops and the like, to improve anchoring in concrete.
  • British Patent 1446855 discloses corrugated and widened-end wire fibers, as well as US Pat. No. 2,677,955 with corrugations and reinforcing fibers for concrete, all of which form fiber out of the rod shape.
  • a wire fiber is created, which has a lower rebound rate and at the same time allows a good anchoring of the fiber.
  • the wire fiber according to the invention is thus able to enable good anchoring and adhesion by a differentiated shaping in concrete, in which the aggregates are also processed with different grain sizes and degrees of fineness.
  • the wire fiber according to the invention is readily pourable and can be evenly distributed within the still flowable concrete mass.
  • the metal wire fiber has a center piece, two connected to the middle piece, bent intermediate pieces and in each case one connected to the intermediate pieces tail.
  • the tail is bent over the intermediate piece such that the tail is substantially parallel to the center piece.
  • the end pieces are flattened at least in a partial area.
  • the middle piece and the two bent intermediate pieces have a circular cross-section.
  • Wire fibers are produced in very large numbers, so that the manufacturing tolerances are relatively large.
  • the wire fibers are formed symmetrically, wherein the middle piece on the two sides each having an intermediate piece with the corresponding end piece.
  • the two end pieces and the center piece of the wire fiber are in a plan.
  • the two spacers of the filament are in one direction, i. bent to one side.
  • Wire fibers for use in reinforcing moldable materials, particularly concrete usually have a length of about 10 to 70 mm and a maximum diameter of up to about 1.3 mm.
  • the intermediate piece together with the end piece has a length of 5 to 20 times the diameter of the wire fiber
  • the flattened end piece a length (I, I ') of 2 to 10 times, preferably 3 to 5 times, the diameter of the wire fiber and a width (B) of 1.5 to 3.5 times the diameter of the wire fiber
  • the bent intermediate piece has a "height" (h, h ') of 2 to 10 times, preferably 3 to 5 times, the diameter of the wire fiber.
  • the wire fibers of the invention can be easily manufactured with the usual machines, of course, the forming parts ie rolls of these machines the form of the wire fiber must be changed accordingly
  • a wire fiber is made of a high-tensile steel having a natural size (L) of 30 mm in a diameter of 0.7 mm.
  • Wire fibers preferably in lengths of 30 to 60 mm with diameters of max. 1.3 mm, are used for the reinforcement of concrete, in which they are evenly mixed in the still flowable state of the concrete.
  • the wire fiber according to Fig. 1 has a central piece L 'and at the two ends of this center piece in each case a z-shaped double kink or hook.
  • the end pieces are partially or completely flattened, which makes the anchorage better and reduces the rebound of the wire fiber.
  • the middle piece and the intermediate pieces have a circular cross-section.
  • the flattened end pieces in this example are about 2-4 mm long (I, I ') and 1.2 to 2 mm (B) wide and dovetail-shaped.
  • the wire used to make this wire has a tensile strength of about 1100 N / mm 2.
  • Fig. 2 shows the same wire fiber in plan view whereby the flattened end pieces are better visible.
  • the fiber described above was tested in accordance with the Bündner guidelines BB2 - 711.100 (October 1998). Shotcrete with a cement content of 425 kg / m 3 according to CEM I 42.5) was used as the building material.
  • the additive used was a plasticizer (Rheobuild 3520 from MBT) in a dosage of 1.2% (based on cement paste), a stabilizer (Delvo Stabi) in a dosage of 0.2% (based on cement paste) and 35 kg / m 3 steel fibers used.
  • the ready-to-use shotcrete had a consistency of 51.0 cm determined by: Slump (according to DIN 1048), a wet chamber weight of 2372 kg / m 3 , an LP content of 1.5% and a TM value: 0.52.
  • the steel fiber content in the hardened concrete is determined by drilling cores.
  • a single value represents the mean of at least three drill cores taken within 1m 2.
  • the core length must be over 5 cm.
  • the amount of sample used to determine a single value must not be less than 5 kg.
  • test specimens each in the form of drill cores with a diameter of 100 mm were tested.
  • the tested sample has on average a steel fiber content of 30.4 kg / m 3 concrete.
  • the ready-to-use shotcrete had a consistency of 54.0 cm determined by: Slump (according to DIN 1048), a wet chamber weight of 2398 kg / m 3 , an LP content of 1.7% and a TM value: 0.50.
  • test pieces in the form of cores with a diameter of 100mm were tested.
  • the tested sample has an average steel fiber content of 37.0 kg / m 3 concrete.
  • the tested sample has on average a steel fiber content of 29.5 kg / m 3 concrete ie a loss of 26%.
  • fibers of the type HE 07/30 of the applicant were tested (40 kg / m3). These fibers comprise a central piece, two intermediate pieces connected to the middle piece and one end piece each connected to the intermediate piece, the end piece being bent relative to the intermediate piece such that the end piece is substantially parallel to the middle piece.
  • the tail is round and, unlike the fiber of the invention, not flattened.
  • the tested sample has on average a steel fiber content of 25.7 kg / m 3 of concrete ie a loss of 36%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Materials For Medical Uses (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (8)

  1. Fibre de fil en métal destinée à une utilisation pour le renfort de matériaux façonnables, en particulier du béton, qui présente une pièce centrale, deux pièces intermédiaires coudées et reliées à la pièce centrale et respectivement une pièce d'extrémité reliée à la pièce intermédiaire, la pièce d'extrémité étant coudée par rapport à la pièce intermédiaire de telle sorte que la pièce d'extrémité est sensiblement parallèle à la pièce centrale, la pièce centrale et la pièce intermédiaire présentant une section circulaire, caractérisée en ce que la pièce d'extrémité est en partie ou complètement aplatie
  2. Fibre de fil selon la revendication 1, caractérisée en ce que les pièces d'extrémité et la pièce centrale se situent dans un plan.
  3. Fibre de fil selon la revendication 1 ou 2, caractérisée en ce que les pièces intermédiaires sont coudées dans une direction
  4. Fibre de fil selon l'une quelconque des revendications précédentes, caractérisée en ce que la fibre de fil présente une longueur d'environ 10 à 70 mm, un diamètre maximum allantjusqu'à environ 1,3 mm
  5. Fibre de fil selon l'une quelconque des revendications précédentes, caractérisée en ce que la pièce intermédiaire et la pièce d'extrémité ont une longueur égale à 5 à 20 fois le diamètre de la fibre de fil.
  6. Fibre de fil selon l'une quelconque des revendications précédentes, caractérisée en ce que la pièce d'extrémité a une longueur (l, l') égale à 2 à 10 fois le diamètre de la fibre de fil
  7. Fibre de fil selon l'une quelconque des revendications précédentes, caractérisée en ce que la pièce d'extrémité aplatie a une largeur (B) représentant 1,5 à 3,5 fois le diamètre de la fibre de fil.
  8. Fibre de fil selon l'une quelconque des revendications précédentes, caractérisée en ce que la pièce intermédiaire a une hauteur (h, h') représentant 2 à 10 fois le diamètre de la fibre de fil
EP01947278A 2000-05-17 2001-05-14 Fibres d'acier Revoked EP1282751B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU90584 2000-05-17
LU90584A LU90584B1 (de) 2000-05-17 2000-05-17 Drahtfaser
PCT/EP2001/005456 WO2001088301A1 (fr) 2000-05-17 2001-05-14 Fibres d'acier

Publications (2)

Publication Number Publication Date
EP1282751A1 EP1282751A1 (fr) 2003-02-12
EP1282751B1 true EP1282751B1 (fr) 2006-09-27

Family

ID=19731904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01947278A Revoked EP1282751B1 (fr) 2000-05-17 2001-05-14 Fibres d'acier

Country Status (9)

Country Link
EP (1) EP1282751B1 (fr)
AT (1) ATE340903T1 (fr)
AU (1) AU2001269008A1 (fr)
DE (1) DE50111098D1 (fr)
DK (1) DK1282751T3 (fr)
ES (1) ES2272492T3 (fr)
LU (1) LU90584B1 (fr)
PT (1) PT1282751E (fr)
WO (1) WO2001088301A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2440717A1 (fr) 2009-06-12 2012-04-18 NV Bekaert SA Fibres à haut allongement
US8962150B2 (en) 2010-12-15 2015-02-24 Nv Bekaert Sa Steel fibre for reinforcing concrete or mortar having an anchorage end with at least two bent sections
US9045901B2 (en) 2009-06-12 2015-06-02 Nv Bekaert Sa High elongation fibre with good anchorage
US9435122B2 (en) 2010-12-15 2016-09-06 Nv Bekaert Sa Steel fibre for reinforcing concrete or mortar having an anchorage end with at least three straight sections

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012080325A2 (fr) 2010-12-15 2012-06-21 Nv Bekaert Sa Fibre d'acier comprenant des segments aplatis, destinée au renforcement du béton ou du mortier
DE202023100215U1 (de) 2023-01-17 2023-02-06 Cbg Composites Gmbh Faserbetonprodukt auf Basis von Basaltfasern mit plastifizierender Wirkung
DE202023103900U1 (de) 2023-08-23 2023-08-25 Cbg Composites Gmbh Faserbetonprodukt, verstärkt mit gehackten Basaltfasern, beschichtet mit unterschichtigem Graphen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677955A (en) 1943-02-12 1954-05-11 Constantinesco George Reinforced concrete
US3942955A (en) * 1969-09-12 1976-03-09 N. V. Bekaert S. A. Reinforcing wire element
DE2305651A1 (de) 1973-02-06 1974-08-08 Josef Helmut Danzer Verstaerkungs- und stabilisierungsteile und deren herstellungsverfahren insbes. fuer giess-beton und dergl
WO1984002732A1 (fr) 1982-12-30 1984-07-19 Eurosteel Sa Elements filiformes utilisables pour le renforcement de materiaux moulables en particulier pour le beton
DE8815120U1 (de) 1988-12-05 1989-03-30 Hermann Gloerfeld -Metallwaren- GmbH & Co. KG, 5860 Iserlohn Armierungsfaser aus Metall, insbesondere aus Stahldraht, zur Armierung von Beton, insbesondere von Spritzbeton
DE9006524U1 (de) 1990-06-09 1990-08-09 Hermann Gloerfeld GmbH & Co KG, 5860 Iserlohn Armierungsfaser aus Metall für die Bewehrung von Beton
BE1009638A3 (nl) * 1995-09-19 1997-06-03 Bekaert Sa Nv Staaldraadelement voor het mengen in achteraf verhardende materialen.
FR2832262A1 (fr) 2001-11-09 2003-05-16 France Telecom Procede et dispositif d'alimentation en energie electrique d'un appareil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2440717A1 (fr) 2009-06-12 2012-04-18 NV Bekaert SA Fibres à haut allongement
US8871020B2 (en) 2009-06-12 2014-10-28 Nv Bekaert Sa High elongation fibres
US9045901B2 (en) 2009-06-12 2015-06-02 Nv Bekaert Sa High elongation fibre with good anchorage
US8962150B2 (en) 2010-12-15 2015-02-24 Nv Bekaert Sa Steel fibre for reinforcing concrete or mortar having an anchorage end with at least two bent sections
US9435122B2 (en) 2010-12-15 2016-09-06 Nv Bekaert Sa Steel fibre for reinforcing concrete or mortar having an anchorage end with at least three straight sections

Also Published As

Publication number Publication date
EP1282751A1 (fr) 2003-02-12
DE50111098D1 (de) 2006-11-09
WO2001088301A1 (fr) 2001-11-22
PT1282751E (pt) 2007-01-31
ATE340903T1 (de) 2006-10-15
LU90584B1 (de) 2001-11-19
ES2272492T3 (es) 2007-05-01
DK1282751T3 (da) 2007-02-05
AU2001269008A1 (en) 2001-11-26

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