EP1282751A1 - Drahtfaser - Google Patents
DrahtfaserInfo
- Publication number
- EP1282751A1 EP1282751A1 EP01947278A EP01947278A EP1282751A1 EP 1282751 A1 EP1282751 A1 EP 1282751A1 EP 01947278 A EP01947278 A EP 01947278A EP 01947278 A EP01947278 A EP 01947278A EP 1282751 A1 EP1282751 A1 EP 1282751A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piece
- wire fiber
- wire
- fibers
- concrete
- 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.)
- Granted
Links
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 in the reinforcement of moldable materials, in particular concrete.
- steel fibers are used as reinforcement elements.
- a reinforced with steel fibers concrete is in its properties, such as tensile strength, breaking strength, shear strength, Streckvermöge ⁇ , ' "strength, dynamic strength, fatigue resistance, improves therefore It is used to an ever greater extent, the steel fiber is intended to have the following characteristics:.. You should tough and firm. It should not break when mixed with concrete or aggregates. It should not be too short or too thick, otherwise it will be insufficient in strengthening.
- Steel wire fibers for reinforcing concrete have been known for a long time, namely in different configurations in the form of a rod, evenly corrugated over the length, chip form or also with surface profiling, as for example in the magazine “Beton, 1989, Issue 4, pages 178 to 180 “by Gerd Humert” Steel wire fibers in practice ".
- wire fibers are corrugated uniformly over their length, as is one in the Dutch patent application 8001609 Proposed evenly alternating stepwise (right-angled corrugated) wire fiber over its length.
- Wire fibers are known from US Pat. No. 6,045,910 which have a center piece with a Z-shaped or L-shaped hook and each consist of an intermediate piece and an end piece.
- the Z- or L-shaped hooks i.e. the intermediate pieces and the end pieces are deformed by flattening.
- DE-OS 23 05 651 also proposes wire fibers which either have a uniformly profiled surface in the longitudinal direction or are entirely deformed from the rod shape into other configurations, such as S-shape, O-shape, triangular shape, loops and the like, to improve anchorage in concrete.
- wire fibers which either have a uniformly profiled surface in the longitudinal direction or are entirely deformed from the rod shape into other configurations, such as S-shape, O-shape, triangular shape, loops and the like, to improve anchorage in concrete.
- corrugated wire fibers with widened ends as well as from US Pat. No. 2,677,955 with corrugations and reinforcing fibers designed for the whole of the rod shape shaping reinforcing fibers for concrete.
- a wire fiber is created which has a lower rebound rate and at the same time allows good anchoring of the fiber.
- the wire fiber according to the invention is thus able to allow good anchoring and adhesion in concrete, in which work is also carried out with different grain sizes and finenesses of the additives, by means of a differentiated shape.
- the wire fiber according to the invention is easy to pour and can be distributed evenly within the still flowable concrete mass.
- the metal wire fiber has a middle piece, two bent intermediate pieces connected to the middle piece and in each case one end piece connected to the intermediate pieces.
- the end piece is bent relative to the intermediate piece in such a way that the end piece is essentially parallel to the middle piece.
- the end pieces are flattened at least in a partial area
- the middle piece and the two bent intermediate pieces have a substantially circular cross section.
- Wire fibers are produced in very large numbers, so that the manufacturing tolerances are relatively large.
- the wire fibers are preferably of symmetrical design, the middle piece having an intermediate piece with the corresponding end piece on each of the two sides.
- the two end pieces and the middle piece of the wire fiber lie in one plan.
- the two intermediate pieces of the wire fiber are in one direction i.e. bent to one side.
- Wire fibers for use in the reinforcement of formable materials, in particular concrete usually have a length of approximately 10 to 70 mm and a maximum durometer of up to approximately 1.3 mm.
- a wire fiber with a maximum diameter of up to approximately 1.3 mm not only circular cross sections of the wire fiber are addressed here, but also oval or rectangular cross sections or approximately rectangular or similar cross sections, the maximum diameter then being based on the equivalent Diameter refers.
- 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 has 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 kinked 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 according to the invention can be produced without problems using the conventional machines, the shaping parts, ie the rollers of these machines, of course having to be changed in accordance with the shape of the wire fibers Description based on the figures
- Fig.1 a wire fiber in the side view
- Fig.2 a wire fiber in the top view
- Fig. 1 is a wire fiber made of a steel with high tensile strength, which in natural size has a length (L) of 30 mm with 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 mixed in evenly while the concrete is still flowing.
- 1 has a center piece L 'and at the two ends of this center piece a z-shaped double bend or hook.
- the end pieces are partially or completely flattened, which improves the anchoring and reduces the rebound of the wire fiber.
- the middle piece and the intermediate pieces have a substantially circular cross section.
- the flattened end pieces in this example are approximately 2-4 mm long (I, I ') and 1.2 to 2 mm (B) wide and are dovetail-shaped.
- the wire used to make this wire fiber has a tensile strength of approximately 1100 N / mm2.
- Fig. 2 shows the same wire fiber in plan view whereby the flattened end pieces are more visible.
- EXAMPLE 1 The fiber described above was tested according to 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. A superplasticizer (Rheobuild 3520 from MBT) in a dosage of 1.2% (based on cement mass), a stabilizer (Delvo Stabi) in a dosage of 0.2% (based on cement mass) and 35 kg / m 3 steel fibers were used as additives used.
- the ready-to-use shotcrete had a consistency of 51.0 cm determined according to: slump (according to DIN 1048), a wet room weight of 2372 kg / m 3 , an LP content of 1.5% and a tool value: 0.52.
- the steel fiber content in the hardened concrete is determined using drill cores.
- a single value represents the mean of at least three drill cores extracted within 1m 2.
- the drill core length must be over 5 cm.
- the sample quantity for determining a single value must not be less than 5 kg. Four test specimens in the form of drill cores with a diameter of 100 mm were tested.
- the sample examined has an average steel fiber content of 30.4 kg / m 3 of concrete.
- the ready-to-use shotcrete had a consistency of 54.0 cm determined according to: slump (according to DIN 1048), a wet room weight of 2398 kg / m 3 , an LP content of 1.7% and a tool value: 0.50.
- test specimens in the form of drill cores with a diameter of 100 mm were tested.
- EXAMPLE 3 Under the same conditions as in Example 2, a known FE 0730 fiber (40 kg / m3) from the applicant was tested. These fibers are essentially straight and have two flattened ends. The sample examined has an average steel fiber content of 29.5 kg / m 3 of concrete, ie a loss of 26%.
- Fibers of type HE 07/30 from the applicant were tested under very similar conditions as in Examples 2 and 3 (40kg / m3). These fibers have a middle piece, two kinked intermediate pieces connected to the middle piece and in each case one end piece connected to the intermediate piece, the end piece being kinked relative to the intermediate piece in such a way that the end piece is essentially parallel to the middle piece. However, the end piece is round and, unlike the fiber according to the invention, is not flattened.
- the sample examined has an average 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)
Description
Claims
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 (de) | 2000-05-17 | 2001-05-14 | Drahtfaser |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1282751A1 true EP1282751A1 (de) | 2003-02-12 |
EP1282751B1 EP1282751B1 (de) | 2006-09-27 |
Family
ID=19731904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01947278A Revoked EP1282751B1 (de) | 2000-05-17 | 2001-05-14 | Drahtfaser |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1282751B1 (de) |
AT (1) | ATE340903T1 (de) |
AU (1) | AU2001269008A1 (de) |
DE (1) | DE50111098D1 (de) |
DK (1) | DK1282751T3 (de) |
ES (1) | ES2272492T3 (de) |
LU (1) | LU90584B1 (de) |
PT (1) | PT1282751E (de) |
WO (1) | WO2001088301A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012080325A2 (en) | 2010-12-15 | 2012-06-21 | Nv Bekaert Sa | Steel fibre for reinforcing concrete or mortar provided with flattened sections |
WO2012080326A2 (en) | 2010-12-15 | 2012-06-21 | Nv Bekaert Sa | Steel fibre for reinforcing concrete or mortar having an anchorage end with at least two bent sections |
WO2012080323A2 (en) | 2010-12-15 | 2012-06-21 | Nv Bekaert Sa | Steel fibre for reinforcing concrete or mortar having an anchorage end with at least three straight sections |
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 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI1010734B1 (pt) | 2009-06-12 | 2019-12-03 | Bekaert Sa Nv | estrutura de concreto compreendendo concreto convencional e fibras de aço para reforçar concreto |
CA2760622C (en) | 2009-06-12 | 2017-03-28 | Nv Bekaert Sa | High elongation fibres |
Family Cites Families (8)
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 |
DE3363554D1 (en) | 1982-12-30 | 1986-06-19 | Eurosteel Sa | Filiform elements usable for reinforcing mouldable materials, particularly concrete |
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 |
-
2000
- 2000-05-17 LU LU90584A patent/LU90584B1/de active
-
2001
- 2001-05-14 EP EP01947278A patent/EP1282751B1/de not_active Revoked
- 2001-05-14 DK DK01947278T patent/DK1282751T3/da active
- 2001-05-14 AT AT01947278T patent/ATE340903T1/de active
- 2001-05-14 ES ES01947278T patent/ES2272492T3/es not_active Expired - Lifetime
- 2001-05-14 WO PCT/EP2001/005456 patent/WO2001088301A1/de active IP Right Grant
- 2001-05-14 DE DE50111098T patent/DE50111098D1/de not_active Revoked
- 2001-05-14 AU AU2001269008A patent/AU2001269008A1/en not_active Abandoned
- 2001-05-14 PT PT01947278T patent/PT1282751E/pt unknown
Non-Patent Citations (1)
Title |
---|
See references of WO0188301A1 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012080325A2 (en) | 2010-12-15 | 2012-06-21 | Nv Bekaert Sa | Steel fibre for reinforcing concrete or mortar provided with flattened sections |
WO2012080326A2 (en) | 2010-12-15 | 2012-06-21 | Nv Bekaert Sa | Steel fibre for reinforcing concrete or mortar having an anchorage end with at least two bent sections |
WO2012080323A2 (en) | 2010-12-15 | 2012-06-21 | Nv Bekaert Sa | Steel fibre for reinforcing concrete or mortar having an anchorage end with at least three straight sections |
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 |
Also Published As
Publication number | Publication date |
---|---|
AU2001269008A1 (en) | 2001-11-26 |
ES2272492T3 (es) | 2007-05-01 |
EP1282751B1 (de) | 2006-09-27 |
DE50111098D1 (de) | 2006-11-09 |
DK1282751T3 (da) | 2007-02-05 |
PT1282751E (pt) | 2007-01-31 |
LU90584B1 (de) | 2001-11-19 |
WO2001088301A1 (de) | 2001-11-22 |
ATE340903T1 (de) | 2006-10-15 |
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