EP0420973B1 - Verfahren zur herstellung einer armierung für die bewehrung von stahlbetonkonstruktionen und nach diesem verfahren erhaltene armierung - Google Patents

Verfahren zur herstellung einer armierung für die bewehrung von stahlbetonkonstruktionen und nach diesem verfahren erhaltene armierung Download PDF

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Publication number
EP0420973B1
EP0420973B1 EP90907125A EP90907125A EP0420973B1 EP 0420973 B1 EP0420973 B1 EP 0420973B1 EP 90907125 A EP90907125 A EP 90907125A EP 90907125 A EP90907125 A EP 90907125A EP 0420973 B1 EP0420973 B1 EP 0420973B1
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EP
European Patent Office
Prior art keywords
reinforcement
sheet
concrete
steel
mpa
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 - Lifetime
Application number
EP90907125A
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English (en)
French (fr)
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EP0420973A1 (de
Inventor
Georges Joseph Michel Guerin
Michel Temenides
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.)
Sollac SA
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Sollac 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
Application filed by Sollac SA filed Critical Sollac SA
Priority to AT90907125T priority Critical patent/ATE78310T1/de
Publication of EP0420973A1 publication Critical patent/EP0420973A1/de
Application granted granted Critical
Publication of EP0420973B1 publication Critical patent/EP0420973B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B21H8/005—Embossing sheets or rolls
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/16—Reinforcements
    • E01C11/18—Reinforcements for cement concrete pavings
    • 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 method of manufacturing a reinforcement for the reinforcement of concrete structures and in particular of concrete slab or veil.
  • the present invention also relates to an armature obtained by this method.
  • FR A-2 579 651 a reinforcing element which can be used for any continuous work of great length and in particular for concrete roads or pavements, which while allowing rapid and easy continuous laying also provides resistance. increased at transverse cracking for a reduced reinforcement rate.
  • This reinforcing element is in the form of a relatively narrow and thin ribbon, the main faces of which are embossed or notched.
  • the embossing is in the form of alternately projecting relief, delimiting bosses and, in hollow delimiting cells.
  • These bosses and cells can be in the form of cones or pyramids possibly truncated or of any other suitable shape such as cylindrical or parallelepiped.
  • the height of the bosses or cells relative to the adjacent surface is preferably from 5 to 80% approximately of the thickness of the strip.
  • the strip is made of steel with high elastic limit, for example, having a tensile strength greater than 800 MPa and, preferably, has a thickness of 0.8 to 2.5 mm and a width of 10 to 60 mm.
  • embossing can be obtained by stamping or possibly hot notching.
  • FR-A-2 579 651 also describes a process for manufacturing an embossed or notched strip as defined above, a process which consists in passing a strip in the form of a flat strip between at least one pair of rollers the working faces respectively have recessed and projecting imprints corresponding to those which it is desired to appear on the strip.
  • said strip In order to give said strip the desired mechanical properties, it is subjected before embossing or notching a patenting treatment and, after embossing or notching, a treatment increasing the resistance to corrosion, such as pickling followed by phophatation.
  • the strip is made of steel with high elastic limit and, consequently, it is not galvanizable, which obliges for its protection against corrosion to make it undergo a phosphating treatment.
  • this steel is not weldable and therefore does not allow, for example, the manufacture of mesh.
  • the invention aims to remedy these drawbacks while retaining the advantages of a flat element for reinforcing a concrete structure.
  • the subject of the invention is a method of manufacturing a reinforcement for the reinforcement of concrete structures and in particular of concrete slab or veil, characterized in that a hot rolled sheet of thickness included is used as base material.
  • a hot rolled sheet of thickness included is used as base material.
  • a hot rolled sheet of thickness included is used as base material.
  • a hot rolled sheet of thickness included is used as base material.
  • steel with a content of carbon less than 0.9% and an elastic limit of around 500 MPa which is subjected to cold rolling at a rate of work hardening greater than 40% to obtain a sheet having on the one hand a thickness of between 0.8 and 2.5mm, and on the other hand an elastic limit greater than 700 MPa, the sheet being split to obtain a strip which is then embossed or notched continuously.
  • Steel with a low carbon content of less than 0.9% and having an elastic limit in the range 250-500 MPa can only be used in the reinforcement of concrete by excessively increasing the density of reinforcement. This is why, according to the invention, steel of low carbon content and of elastic limit of the order of 500 MPa is subjected to cold rolling at a rate of work hardening greater than 40% in order to obtain the characteristics mechanical necessary for its use, in acceptable density, in the reinforcement of concrete structures.
  • the use of low carbon steel makes it possible to obtain a weldable reinforcement for producing complex structures.
  • the cold-rolled sheet is galvanized, which provides good protection against corrosion, in particular when the sheet is subjected to pitting or scratches. This protection is superior to a phosphating treatment.
  • the galvanized sheet is subjected to a restoration annealing at a temperature between 440 ° C and 520 ° C.
  • the restoration annealing is carried out under a controlled atmosphere of nitrogen and hydrogen.
  • the subject of the present invention is a reinforcement for reinforcing concrete structures, characterized in that it is obtained by the process mentioned above and in that it has at its ends a cutout allowing the insertion of a piece of liaison.
  • the cutout allows a mechanical connection with one end of another frame placed at the end, the connecting piece adjusting in the cutouts placed in superposition.
  • the cutout forms at least one cylindrical hole placed in the longitudinal axis of the frame, the connecting piece then being a rivet or a staple.
  • the cutout forms at least one notch, produced on the field of the frame, and into which can be inserted a connecting means formed for example of a steel strip folded in U.
  • the invention also relates to a concrete slab or veil, characterized in that the reinforcing elements consist of reinforcements according to the invention.
  • the subject of the invention is also a sub-layer of roadway in lean or serious concrete stabilized by a hydraulic binder in which are inserted, for reinforcement, reinforcements according to the invention.
  • the method of manufacturing a reinforcement 1 as shown in Figs 1 and 2 for the reinforcement of concrete structures consists of the use of a base material consisting of a hot rolled sheet of 1.5 to 6 mm thickness of cladding steel and roofing whose elastic limit is less than 500 MPa.
  • a base material consisting of a hot rolled sheet of 1.5 to 6 mm thickness of cladding steel and roofing whose elastic limit is less than 500 MPa.
  • the sheet is cold rolled under a hardening rate greater than 40%. After cold rolling, the sheet is reduced to a thickness of between 0.4 and 2.5 mm.
  • Such a sheet by the properties of the base material, is a weldable sheet, moreover the cold rolling treatment gives it mechanical properties comparable to that of a so-called hard steel whose elastic limit is between 600 and 800 MPa.
  • the cold-rolled sheet is galvanized.
  • the temperatures of the restoration annealing are between 480 and 520 ° C.
  • the duration of reprocessing under controlled atmosphere of N2 and H2 is approximately 30 seconds.
  • the corrosion protection of a galvanized steel is superior to a corrosion protection of a phosphated steel, particularly in the use of steel used in the construction of public works such as roads, such constructions undergoing between other the effects of alkaline products, widespread in winter for thawing.
  • the cold rolled sheet, then galvanized, is split into strips so as to obtain strips with a width of between 10 and 60mm approximately.
  • the frame 1 according to the invention is produced by an embossing by stamping or by a notching of the strip so as to form bosses projecting on one side, corresponding to cells on another side. This shaping can be carried out cold.
  • the thickness of the base sheet before cold rolling is represented by the thin lines 2, and after stamping the strip 3 obtained by slitting said sheet into a strip, the frame 1 has projections 4 and corresponding recesses 5 of approximately 3mm in diameter distributed uniformly over its entire surface.
  • the projections 4 have the advantage of blocking by interlocking the phenomenon of unwinding by elasticity of the wound frames.
  • the frame 1 has at its ends a cutout allowing the insertion of a connecting piece.
  • the cutout forms at least one cylindrical hole 6 placed in the longitudinal axis of the frame 1, and the connecting piece is formed by a rivet 7.
  • the rivet 7 is placed between two ends of the frame 1 so as to ensure continuity of the reinforcement, for example in a reinforced concrete slab and, for this purpose, the hole 6 is made in the two joined frames for the passage of the body of the rivet 7.
  • notches 9 are cut on the field of said reinforcements 1. These notches can be rectangular or trapezoidal and their depth is substantially equal to the thickness of a connecting means 8.
  • the notches 9 are superimposed so as to insert the connecting means 8 which, in this exemplary embodiment, is formed by a steel strip folded in a U shape.
  • the connection is ensured by crushing the two lips of the U.
  • the frame 1 thus produced can be used in particular for the construction of concrete pavements as shown in FIG. 5.
  • the frame 1 is then embedded in the concrete 10 parallel to the longitudinal axis of the road in one or more plies parallel to the surface of the latter.
  • the reinforcement rate as a percentage of straight section of the road is preferably 0.15 to 0.5%, this rate to be understood as the ratio between the steel section and the concrete section, in a plane perpendicular to the longitudinal axis of the road .
  • the reinforcements 1 can also be spot welded. Thus it is possible to make welded mesh covering large areas.
  • Reinforcement 1 can also be used to reinforce lean concrete or gravel stabilized by a hydraulic binder for an underlayment of roadway, which allows the suppression of macro-cracking and primers of degradation.
  • reinforcements according to the invention which can be unwound in great lengths without harmful permanent deformation and linked or welded together makes it possible on the one hand to obtain continuous progress of the site, consequently with improved quality, and d on the other hand to greatly reduce the length of road occupied by the site, therefore to reduce in the same way the inconvenience brought to traffic in the case of a reinforcement or a renewal of an existing road or pavement, while ensuring corrosion protection, particularly effective against alkaline products spread on pavements in winter.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Road Paving Structures (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Claims (9)

1. Verfahren zur Herstellung einer Armierung zur Verstärkung von Betonstrukturen, insbesondere von Platten- oder Schalenkonstruktionen aus Beton, welche in Form eines Stahlbandes mit gerippten oder geprägten Oberflächen ausgebildet sind, dadurch gekennzeichnet, daß ein heißgewalztes Blech mit einer Dicke zwischen 1,5 und 6 mm als Grundmaterial verwendet wird, wobei der für das Blech verwendete Stahl einen Kohlenstoffgehalt von unter 0,9 % und eine elastische Grenze von ungefähr 500 MPa aufweist, daß man es einer bei einer Kaltwalzung einem Härtungsgrad von über 40 % aussetzt, um ein Blech zu erhalten, das einerseits eine Dicke zwischen 0,8 und 2,5 mm und andererseits eine elastische Grenze oberhalb von 700 MPa aufweist, wobei zur Erhaltung eines Bandes (3), welches dann kontinuierlich gerippt oder geprägt ist, das Blech gespalten wird.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das kaltgewalzte Blech galvanisiert wird.
3. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das galvanisierte Blech einem Erholungsglühen bei einer Temperatur zwischen 480°C und 520°C ausgesetzt wird.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß das Erholungsglühen in einer kontrollierten Stickstoffund Wasserstoffatmosphäre durchgeführt wird.
5. Armierung, dadurch gekennzeichnet, daß sie durch das Verfahren nach den Ansprüchen 1 bis 4 hergestellt ist und daß sie an ihren Enden eine Ausnehmung (6, 9) aufweist, die die Einführung eines Verbindungsstücks (7, 8) ermöglicht.
6. Armierung nach Anspruch 5, dadurch gekennzeichnet, daß die Ausnehmung mindestens ein zylindrisches Loch (6) bildet, welches in der Längsachse der Armierung (1) angeordnet ist.
7. Armierung nach Anspruch 5, dadurch gekennzeichnet, daß die Ausnehmung mindestens eine Einkerbung (9) bildet, welche auf der Schmalseite der Armierung ausgebildet ist.
8. Platte oder Schale aus Beton, dadurch gekennzeichnet, daß sie zu ihrer Verstärkung Armierungen (1) aufweist, wie sie in den Ansprüchen 5 bis 7 angegeben sind.
9. Straßenunterlage aus magerem oder grobem Beton, der durch ein hydraulisches Bindemittel stabilisiert ist, dadurch gekennzeichnet, daß sie zur Verstärkung Armierungen (1) aufweist, wie sie in den Ansprüchen 5 bis 7 angegeben sind.
EP90907125A 1989-04-10 1990-04-10 Verfahren zur herstellung einer armierung für die bewehrung von stahlbetonkonstruktionen und nach diesem verfahren erhaltene armierung Expired - Lifetime EP0420973B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90907125T ATE78310T1 (de) 1989-04-10 1990-04-10 Verfahren zur herstellung einer armierung fuer die bewehrung von stahlbetonkonstruktionen und nach diesem verfahren erhaltene armierung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8904679 1989-04-10
FR8904679A FR2645562B1 (fr) 1989-04-10 1989-04-10 Procede de fabrication d'une armature pour le renforcement des structures en beton et armature obtenue selon ce procede

Publications (2)

Publication Number Publication Date
EP0420973A1 EP0420973A1 (de) 1991-04-10
EP0420973B1 true EP0420973B1 (de) 1992-07-15

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EP90907125A Expired - Lifetime EP0420973B1 (de) 1989-04-10 1990-04-10 Verfahren zur herstellung einer armierung für die bewehrung von stahlbetonkonstruktionen und nach diesem verfahren erhaltene armierung

Country Status (8)

Country Link
US (1) US5154534A (de)
EP (1) EP0420973B1 (de)
JP (1) JP2704042B2 (de)
CA (1) CA2029905A1 (de)
ES (1) ES2034860T3 (de)
FR (1) FR2645562B1 (de)
WO (1) WO1990012175A1 (de)
ZA (1) ZA902755B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102869462A (zh) * 2010-04-28 2013-01-09 Dbw控股有限公司 金属制成的平的半成品及其制法和由其制成的部件

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FR2704255B1 (fr) * 1993-04-20 1995-07-13 Lorraine Laminage Armature pour le renforcement de structures en beton et procede de fabrication de cette armature.
EP0674060A1 (de) * 1994-03-04 1995-09-27 Wilhelm Modersohn GmbH & Co KG Verankerungstechnik Mauerwerksbewehrung
GB2302106B (en) * 1995-06-10 1999-08-25 Metsec Plc Metal strip
CH691691A5 (de) * 1997-01-21 2001-09-14 Varinorm Ag Stütze, insbesondere Stahlbetonstütze.
WO2005012006A1 (ja) * 2003-08-04 2005-02-10 The Yokohama Rubber Co., Ltd. 空気入りタイヤ
EP2017507B1 (de) 2007-07-16 2016-06-01 Tenaris Connections Limited Gewindeverbindungsstück mit elastischem Dichtungsring
DE102009048425A1 (de) * 2009-10-06 2011-04-07 Häussler Innovation GmbH Verfahren und Vorrichtung zur Herstellung geschweißter Verbindungen
EP2325435B2 (de) 2009-11-24 2020-09-30 Tenaris Connections B.V. Verschraubung für [ultrahoch] abgedichteten internen und externen Druck
JP2011246737A (ja) * 2010-05-24 2011-12-08 Nippon Telegr & Teleph Corp <Ntt> 複合材料
US9163296B2 (en) 2011-01-25 2015-10-20 Tenaris Coiled Tubes, Llc Coiled tube with varying mechanical properties for superior performance and methods to produce the same by a continuous heat treatment
US9970242B2 (en) 2013-01-11 2018-05-15 Tenaris Connections B.V. Galling resistant drill pipe tool joint and corresponding drill pipe
US9803256B2 (en) 2013-03-14 2017-10-31 Tenaris Coiled Tubes, Llc High performance material for coiled tubing applications and the method of producing the same
EP2789700A1 (de) 2013-04-08 2014-10-15 DALMINE S.p.A. Dickwandige vergütete und nahtlose Stahlrohre und entsprechendes Verfahren zur Herstellung der Stahlrohre
EP2789701A1 (de) 2013-04-08 2014-10-15 DALMINE S.p.A. Hochfeste mittelwandige vergütete und nahtlose Stahlrohre und entsprechendes Verfahren zur Herstellung der Stahlrohre
KR102368928B1 (ko) 2013-06-25 2022-03-04 테나리스 커넥션즈 비.브이. 고크롬 내열철강
US11124852B2 (en) 2016-08-12 2021-09-21 Tenaris Coiled Tubes, Llc Method and system for manufacturing coiled tubing
US10434554B2 (en) 2017-01-17 2019-10-08 Forum Us, Inc. Method of manufacturing a coiled tubing string

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Publication number Priority date Publication date Assignee Title
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Also Published As

Publication number Publication date
ZA902755B (en) 1991-11-27
ES2034860T3 (es) 1993-04-01
FR2645562A1 (fr) 1990-10-12
JPH03505358A (ja) 1991-11-21
JP2704042B2 (ja) 1998-01-26
CA2029905A1 (fr) 1990-10-11
US5154534A (en) 1992-10-13
EP0420973A1 (de) 1991-04-10
FR2645562B1 (fr) 1992-11-27
WO1990012175A1 (fr) 1990-10-18

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