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EP1840291A2 - Élément de renforcement pour structures en béton et élément structurel en béton utilisant cet élément de renforcement - Google Patents

Élément de renforcement pour structures en béton et élément structurel en béton utilisant cet élément de renforcement Download PDF

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Publication number
EP1840291A2
EP1840291A2 EP07006679A EP07006679A EP1840291A2 EP 1840291 A2 EP1840291 A2 EP 1840291A2 EP 07006679 A EP07006679 A EP 07006679A EP 07006679 A EP07006679 A EP 07006679A EP 1840291 A2 EP1840291 A2 EP 1840291A2
Authority
EP
European Patent Office
Prior art keywords
reinforcing element
ribs
recesses
filiform body
reinforcing
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.)
Withdrawn
Application number
EP07006679A
Other languages
German (de)
English (en)
Other versions
EP1840291A3 (fr
Inventor
Giuseppe De Rossi
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.)
La Matassina Srl
Original Assignee
La Matassina Srl
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 La Matassina Srl filed Critical La Matassina Srl
Publication of EP1840291A2 publication Critical patent/EP1840291A2/fr
Publication of EP1840291A3 publication Critical patent/EP1840291A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E04C5/073—Discrete reinforcing elements, e.g. fibres

Definitions

  • the invention concerns a reinforcing element for concrete structures and a concrete structural element using said reinforcing element.
  • reinforcing elements are usually included in the concrete mix in order to increase its mechanical characteristics.
  • Said reinforcing elements are commonly called “fibres” and are constituted by variously shaped filiform elements with reduced thickness, only a few centimetres long and made of steel or of a plastic material, which are included in the concrete mix, thus improving its resistance and its behaviour in case of shrinking and cracking.
  • the reinforcing elements deploy their characteristics of binding elements, thus improving the resistance of the mix, especially when the concrete matrix cracks.
  • a reinforcing element carried out according to the known art and widely used for making fibre-reinforced concrete is represented in Figure 1, where it is indicated as a whole by A .
  • the reinforcing elements of this kind have a smooth surface and are therefore characterized by limited resistance against the slipping effect generated in case of cracking of the concrete matrix in which they are dispersed.
  • It comprises a filiform element E with mainly longitudinal development and circular cross section, provided with a plurality of waves G that follow one another on its entire length.
  • Reinforcing elements of the type described above made of a metallic material like for example steel with low carbon percentage or a plastic material, develop higher resistance to slipping since each wave G counteracts the action of the concrete matrix M, thus generating the reactions R illustrated in Figure 2a.
  • a further reinforcing element belonging to the known art is represented in Figure 3, where it is indicated as a whole by H and where it can be observed that it is constituted by a filiform flat strap L having smooth surfaces N.
  • Reinforcing elements of the type described above made of a metallic material like for example steel with low carbon percentage or a plastic material, pose the drawback that the surfaces N, being smooth, do not develop any resistance against slipping out of the concrete matrix in case of cracking.
  • the present invention aims to overcome all the acknowledged drawbacks mentioned above, occurring in the reinforcing elements carried out according to the known art.
  • a reinforcing element for concrete structures that, according to the main claim, comprises a filiform body having at least one shaped section in the vicinity of each end and is characterized in that at least part of the external surface of the filiform body is made rough by a plurality of ribs delimiting recesses created in said filiform body.
  • the filiform body is constituted by a flat strap that defines a mainly longitudinal direction and presents external surfaces provided with a plurality of recesses and ribs that intersect one another.
  • the shaped sections are two and each one of them is created in the vicinity of one end of the filiform body, where it defines a concavity delimited by a profile having an axis of symmetry orthogonal to the surface of the flat strap and to the longitudinal direction defined by said flat strap.
  • each profile of each shaped section it is possible to identify two counteracting surfaces that generate reactions against the concrete matrix in case of cracking of the matrix itself.
  • the flat strap is made of a plastic polymeric material, but it can also be made of metal, preferably steel with low carbon percentage.
  • the reinforcing element that is the subject of the invention achieves higher anchorage capacity and higher resistance to slipping in the concrete matrix where it is immersed compared to reinforcing elements of known type with equal size, due to the presence of the ribs on its surface.
  • the reinforcing element that is the subject of the invention features higher resistance to slipping in case of cracking of the concrete matrix compared to reinforcing elements of known type and consequently it increases the resistance to cracking of the concrete structure in which it is dispersed.
  • the presence of the ribs and recesses does not modify the elasticity of the reinforcing element that thus maintains the rigidity and resistance to elongation that are typical of the initial filiform element from which it derives.
  • the reinforcing element forming the subject of the invention is shown in the axonometric view of Figure 4, where it is indicated as a whole by 1.
  • At least part of the external surface 4 of the filiform body 2 is made rough by a plurality of ribs 5 that delimit recesses 6 created in the filiform body.
  • the filiform body 2 As regards the filiform body 2, it can be observed that it consists of a flat strap 7 defining a mainly longitudinal direction X.
  • the flat strap has rectangular cross section and presents the external surface 4 provided with the ribs 5 and the recesses 6.
  • the filiform body instead of comprising a flat strap with rectangular cross section, may comprise a thread with curved or circular cross section or any filiform element having any shape and section, provided that on at least part of its external surface there are said ribs and said recesses.
  • the recesses 6 have a substantially polygonal shape, in particular the shape of a quadrilateral.
  • said recesses 6 may have any shape.
  • the ribs 5 and the recesses 6 can be obtained by forming the filiform body 2 with a shaped roller and according to the known technique.
  • each of them defines a concavity 9 delimited by a profile 10 having an axis of symmetry Y that is orthogonal to the surface of the flat strap 7, as shown in the detail of Figure 7.
  • the concavities 9 of the shaped sections 3, as shown in Figure 4, are coplanar and face the same direction, while in a construction variant of the reinforced element indicated by 20 shown in Figure 5, the shaped sections 21 are still coplanar, but their concavities 22 face opposite directions.
  • the profile 10, 23 that delimits each concavity 9, 22 has the shape of a trapezium.
  • each concavity can have another shape, for example curved or mixtilinear, not necessarily defining an axis of symmetry.
  • Reinforcing elements 1, 20 carried out according to any of the embodiments of the invention described herein are used to reinforce a concrete structural element 30 shown in Figure 8, in whose concrete matrix 31 a plurality of reinforcing elements 1, 20 subject of the invention are dispersed at random.
  • the reinforcing elements 1, 20 are firmly anchored inside the concrete matrix 31 owing to the presence of the ribs 5 and the recesses 6 that prevent any sliding and slipping when the concrete matrix 31 of the structural element 30 happens to crack as shown in Figure 8.
  • the reinforcing elements 1, 20 that are the subject of the invention feature higher resistance to slipping than the reinforcing elements of known type, which are not provided with the ribs 5 and the recesses 6.
  • the profile 10 that defines it comprises two counteracting surfaces 10a, 10b against which the reactions R are developed when, during the cracking of the matrix 31 shown in Figure 8, the filiform element is subjected to the traction force F.
  • the reinforcing element that is the subject of the invention features the shaped sections that increase resistance in the concrete matrix, compared to the reinforcing elements belonging to the known art.
  • the material of which the reinforcing element is made is preferably constituted by a polymeric plastic material that is easier to obtain and less expensive to produce.
  • the reinforcing element can also be made of any other material, for example ferrous metallic material with low carbon content.
  • the reinforcing element can be carried out with any shape and dimensions, as well as the profiles of the terminal shaped sections and of the ribs and recesses created thereon.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
EP07006679A 2006-03-31 2007-03-30 Élément de renforcement pour structures en béton et élément structurel en béton utilisant cet élément de renforcement Withdrawn EP1840291A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVI20060093 ITVI20060093A1 (it) 2006-03-31 2006-03-31 Elemento di rinforzo per strutture in calcestruzzo ed elemento strutturale in calcestruzzo che utilizza tale elemento di rinforzo

Publications (2)

Publication Number Publication Date
EP1840291A2 true EP1840291A2 (fr) 2007-10-03
EP1840291A3 EP1840291A3 (fr) 2008-07-30

Family

ID=38134870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07006679A Withdrawn EP1840291A3 (fr) 2006-03-31 2007-03-30 Élément de renforcement pour structures en béton et élément structurel en béton utilisant cet élément de renforcement

Country Status (2)

Country Link
EP (1) EP1840291A3 (fr)
IT (1) ITVI20060093A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100885962B1 (ko) 2007-07-05 2009-02-26 재단법인 포항산업과학연구원 콘크리트 무량판 구조의 전단 보강용 밴드
WO2010009687A1 (fr) * 2008-07-23 2010-01-28 Karl-Hermann Stahl Procédé de production de fibres métalliques
WO2012080323A3 (fr) * 2010-12-15 2012-11-08 Nv Bekaert Sa Fibre d'acier destinée au renforcement du béton ou du mortier, dotée d'une extrémité d'ancrage comprenant au moins trois segments droits
WO2012080326A3 (fr) * 2010-12-15 2012-11-15 Nv Bekaert Sa Fibre d'acier destinée au renforcement du béton ou du mortier, dotée d'une extrémité d'ancrage comprenant au moins deux segments incurvés
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
KR101711843B1 (ko) * 2015-09-11 2017-03-07 주식회사 금강 콘크리트용 보강재를 혼입한 트러스데크 슬래브
KR101711842B1 (ko) * 2015-09-11 2017-03-07 주식회사 금강 콘크리트용 보강재
EP3419947A4 (fr) * 2016-02-22 2019-10-16 ABC Polymer Industries, LLC Fibres de renfort pour béton

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0608013A2 (fr) 1993-01-21 1994-07-27 Robert Hugo Jacob Over Fibre de renforcement pour le renforcement du béton
US6060163A (en) 1996-09-05 2000-05-09 The Regents Of The University Of Michigan Optimized geometries of fiber reinforcement of cement, ceramic and polymeric based composites

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3680640D1 (de) * 1985-11-07 1991-09-05 Akzo Nv Bewehrungselement aus kunststoff, verwendbar in armiertem beton, insbesondere in vorgespanntem beton, armierter beton versehen mit solchen bewehrungselementen und verfahren zur herstellung von bewehrungselementen und armiertem und vorgespanntem beton.
CA1307677C (fr) * 1987-11-25 1992-09-22 Susumu Takata Fibres metalliques utilisees pour le renforcement du beton
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.
FR2680780B1 (fr) * 1991-08-28 1994-04-08 Hutchinson Adjuvant pour materiau a base de liant, comme du beton, mortier enduit ou analogue, utilisation d'un tel adjuvant et materiau l'incorporant.
BE1009638A3 (nl) * 1995-09-19 1997-06-03 Bekaert Sa Nv Staaldraadelement voor het mengen in achteraf verhardende materialen.
DE29901676U1 (de) * 1999-02-01 1999-08-12 Vulkan-Harex Stahlfasertechnik GmbH & Co. KG, 44653 Herne Bewehrungsfaser zur Bewehrung von Stahlfaserbeton

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0608013A2 (fr) 1993-01-21 1994-07-27 Robert Hugo Jacob Over Fibre de renforcement pour le renforcement du béton
US6060163A (en) 1996-09-05 2000-05-09 The Regents Of The University Of Michigan Optimized geometries of fiber reinforcement of cement, ceramic and polymeric based composites

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100885962B1 (ko) 2007-07-05 2009-02-26 재단법인 포항산업과학연구원 콘크리트 무량판 구조의 전단 보강용 밴드
EA018742B1 (ru) * 2008-07-23 2013-10-30 Цент Унд Цент Гмбх Унд Ко. Кг Способ изготовления стальных волокон
WO2010009687A1 (fr) * 2008-07-23 2010-01-28 Karl-Hermann Stahl Procédé de production de fibres métalliques
US9630226B2 (en) 2008-07-23 2017-04-25 Cent & Cent Gmbh & Co. Kg Method for producing steel fibers
US9045901B2 (en) 2009-06-12 2015-06-02 Nv Bekaert Sa High elongation fibre with good anchorage
US8871020B2 (en) 2009-06-12 2014-10-28 Nv Bekaert Sa High elongation fibres
CN103261544A (zh) * 2010-12-15 2013-08-21 贝卡尔特公司 用于强化混凝土或砂浆强化的且具有带有至少三个直部分的锚固端的钢纤维
EA024218B1 (ru) * 2010-12-15 2016-08-31 Нв Бекаэрт Са Стальная фибра для армирования бетона или строительного раствора, имеющая анкерный конец по меньшей мере с тремя прямыми секциями
CN103261542A (zh) * 2010-12-15 2013-08-21 贝卡尔特公司 用于强化混凝土或砂浆的、具有带有至少两个弯曲部的锚固端的钢纤维
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
WO2012080326A3 (fr) * 2010-12-15 2012-11-15 Nv Bekaert Sa Fibre d'acier destinée au renforcement du béton ou du mortier, dotée d'une extrémité d'ancrage comprenant au moins deux segments incurvés
AU2011343412B2 (en) * 2010-12-15 2016-04-14 Nv Bekaert Sa Steel fibre for reinforcing concrete or mortar having an anchorage end with at least two bent sections
CN103261544B (zh) * 2010-12-15 2016-06-01 贝卡尔特公司 用于强化混凝土或砂浆强化的且具有带有至少三个直部分的锚固端的钢纤维
JP2014506223A (ja) * 2010-12-15 2014-03-13 ナムローゼ・フェンノートシャップ・ベーカート・ソシエテ・アノニム 少なくとも２つの屈曲区域を備える定着端を有するコンクリートまたはモルタルを補強するための鋼繊維
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
EA025712B1 (ru) * 2010-12-15 2017-01-30 Нв Бекаэрт Са Стальное волокно для армирования бетона или цементного раствора, имеющее анкерный конец по меньшей мере с двумя изогнутыми секциями
WO2012080323A3 (fr) * 2010-12-15 2012-11-08 Nv Bekaert Sa Fibre d'acier destinée au renforcement du béton ou du mortier, dotée d'une extrémité d'ancrage comprenant au moins trois segments droits
KR101711842B1 (ko) * 2015-09-11 2017-03-07 주식회사 금강 콘크리트용 보강재
KR101711843B1 (ko) * 2015-09-11 2017-03-07 주식회사 금강 콘크리트용 보강재를 혼입한 트러스데크 슬래브
EP3419947A4 (fr) * 2016-02-22 2019-10-16 ABC Polymer Industries, LLC Fibres de renfort pour béton

Also Published As

Publication number Publication date
ITVI20060093A1 (it) 2007-10-01
EP1840291A3 (fr) 2008-07-30

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