EP0018491B1 - Armature fibreuse pour éléments de construction et revêtements à liant de ciment ou de bitume - Google Patents

Armature fibreuse pour éléments de construction et revêtements à liant de ciment ou de bitume Download PDF

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Publication number
EP0018491B1
EP0018491B1 EP80101468A EP80101468A EP0018491B1 EP 0018491 B1 EP0018491 B1 EP 0018491B1 EP 80101468 A EP80101468 A EP 80101468A EP 80101468 A EP80101468 A EP 80101468A EP 0018491 B1 EP0018491 B1 EP 0018491B1
Authority
EP
European Patent Office
Prior art keywords
fibre
fibres
fibers
forms
fibrous reinforcement
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
EP80101468A
Other languages
German (de)
English (en)
Other versions
EP0018491A3 (en
EP0018491A2 (fr
Inventor
Adolf Arnheiter
Rudolf Enzler
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.)
INTER-FORTA AG
Original Assignee
Inter-Forta AG
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 Inter-Forta AG filed Critical Inter-Forta AG
Priority to AT80101468T priority Critical patent/ATE4337T1/de
Publication of EP0018491A2 publication Critical patent/EP0018491A2/fr
Publication of EP0018491A3 publication Critical patent/EP0018491A3/de
Application granted granted Critical
Publication of EP0018491B1 publication Critical patent/EP0018491B1/fr
Expired legal-status Critical Current

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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31815—Of bituminous or tarry residue
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/184—Nonwoven scrim
    • Y10T442/188—Metal or metal-coated fiber-containing scrim

Definitions

  • the invention relates to a fibrous reinforcement for cement and bitumen-bonded components and coverings, with at least two different groups of fiber structures according to the preamble of claim 1.
  • fibers for the reinforcement and reinforcement of materials, the so-called fiber reinforcement, is generally known.
  • the following fibers in particular, in the form of monofilament fibers are considered to be expedient for the use mentioned: steel fibers, glass fibers, plastic fibers (e.g. polypropylene, polyethylene, polyamide, aramid (highly aromatic polyamide), PVC, carbon fibers, asbestos fibers, Natural fibers.
  • plastic fibers e.g. polypropylene, polyethylene, polyamide, aramid (highly aromatic polyamide), PVC, carbon fibers, asbestos fibers, Natural fibers.
  • the fibrous reinforcement is designed according to the characterizing part of claim 1.
  • the distribution of the percentages of the groups of fiber structures of different fiber lengths is equal to the distribution of the percentages of the aggregates used of different grain sizes.
  • the reinforcement elements which are evenly distributed over the cross-section of the reinforced component, do not aggregate. They are so evenly distributed and proportionately present in the mix that they can be regarded as additional additives.
  • This reinforcement element has the shape of a closed fiber network made of polypropylene and is shown in FIGS. 1 and 2.
  • This fiber network is a one-piece structure, two different fiber thicknesses being present in the embodiment shown.
  • First fibers 1 are each connected to one another by second fibers 2, the cross section of the second fibers 2 being smaller than the cross section of the first fibers 1.
  • the fine polypropylene fibers are resilient, for example all the second fibers 2 act as springs which keep the first fibers 1 at a distance from one another, overcoming the mutual attraction forces, so that the fibers self-distribute in the mix or in the concrete.
  • individual fiber ends 3 loop around the grains of the material to be mixed, which additionally counteract the agglomeration of the fiber network during mixing and immediately afterwards.
  • the net-shaped reinforcement element in the final state does not describe the flat plane shown in FIG. 1, but is deformed in space in all three dimensions. ' a
  • the state of the reinforcement element before it is introduced into the mix is shown in FIG. 2.
  • the reinforcement element is wound wound in a string, the number of turns being predetermined.
  • the reinforcement element in the gathered form shown in FIG. 2 is entered together with the material to be mixed into the concrete mixing machine, and the mixing is then carried out in the usual manner and during the standardized period of time. During this period, the cord shape of the reinforcement element is opened and after this time period the reinforcement element is in the three-dimensionally distributed network form.
  • the mixing farmer is standardized in the production of concrete. Therefore, the number of turns of the cord piece to obtain a three-dimensional network after mixing can be determined exactly. If the mesh is not completely open after the mixing process has ended, its effect on the reinforcement is limited.
  • the mesh If the mesh is fully open before mixing is complete, it will be torn apart during the remaining mixing period, take the form of the known split fibers, and also lose its effect as a reinforcement element.
  • the reinforcement element in the present gathered form according to FIG. 2, it is now possible to use the reinforcement element in practice without difficulty, since it does not require any additional devices for introducing it into the mix (in particular it does not have to be sprinkled in) and, in addition, there is no additional monitoring of time periods necessary.
  • the insertion form twisted into the cord is only pure, for example.
  • the gathered form can be formed by other deformations, and water-soluble adhesives can also be arranged to hold the gathered form together.
  • Such a uniform distribution can now be achieved when using such self-distributing mesh reinforcement elements, this together, i. H. in combination with other known fibrous reinforcement elements in the form of individual fibers such.
  • One or more of these types of fibers can be used together with the reticular reinforcement element, the fiber lengths can be different, as will be explained in more detail below.
  • reinforcing fibers which are individual fibers
  • the fiber network self-distributing during mixing, the single fibers are evenly distributed by the spreading networks.
  • the nets also prevent the individual fibers from clumping together, since the nets prevent the individual fibers from doing so purely mechanically.
  • the individual fibers are thus guided through the networks in such a way that a uniform distribution of the individual fibers, and obviously also the fiber networks, is achieved in the reinforced concrete piece.
  • a test specimen was first made from unreinforced concrete. A bending tensile strength of approximately 32 kg / cm 2 was measured for this concrete body, which value is a common average value for concrete. Then another concrete test piece was produced, to which a calculated optimal amount of steel fibers, namely 144 kg, was added. A bending tensile strength of this concrete steel specimen, which was reinforced only with steel fibers, was measured at approximately 68 kp / cm 2 . The steel fibers thus improved the bending tensile strength by approximately 36 kp / cm 2. Another concrete test piece was produced in which a calculated optimal amount of 1 kg of the reticular polypropylene fiber reinforcement was added. A bending tensile strength of a concrete test piece reinforced with plastic mesh was measured at approximately 36 kp / cm 2 . So the improvement in bending tensile strength was 4 kp / cm 2.
  • the quality of the concrete also depends on the even distribution of the aggregates with different grain sizes. It is not only important how evenly a certain grain size (i.e., e.g. gravel bodies with a diameter of only 5 mm) is distributed in the poured concrete, but also what the proportions of the different grain sizes are.
  • a certain grain size i.e., e.g. gravel bodies with a diameter of only 5 mm
  • the aggregates for the production of concrete have to follow certain rules, among other things with regard to the grain sizes.
  • the aggregate grain build-up curve i. That is, the so-called sieve curve lies within predetermined limits and demonstrates a predetermined course, as is stipulated in Switzerland, for example, in Article 2.02 of the SIA standards, which sieve curve also corresponds to the DIN standard 1045 with regard to the aggregates for concrete .
  • A denotes the residue in percent by weight
  • B the mesh size or round hole size in mm
  • C passage in percent by weight.
  • curve S indicates mean values with respect to permissible scatter ranges, which is known to the person skilled in the art. (The corresponding curve S according to DIN 1045 is defined as "particularly good”.)
  • This sieve curve which is based on purely technical facts and knowledge, determines the percentage distribution of the aggregates of different grain sizes in order to obtain a (unreinforced) high-quality concrete.
  • fiber length instead of using only a predetermined length of the respective fibers, fibers of the same material with different lengths are used, however, analogously to the different grain sizes of the additives.
  • the percentage distribution of the amounts of the respective fiber lengths with respect to the grain sizes of the additives follows the recognized law.
  • Another property to be considered for reinforcement fibers is the modulus of elasticity of the materials from which the fibers are made. This means that the fiber reinforcement not only has to consist of only two fiber groups according to the above (but which can also be used in practice), but the polypropylene network together with steel fibers and / or glass fibers and / or carbon fibers and / or asbestos fibers and / or other plastic fibers, e.g. B. aramid etc. is to be used.
  • the known sieve curve S according to FIG. 3 forms the basis of the percentage quantity distribution of the fiber reinforcements with respect to the elastic modulus, as shown in FIG. 5.
  • F means the amount in%
  • G the modulus of elasticity in kp / cm 2 , representing different substances
  • curve U again corresponds to curve S in FIG. 3.
  • the regularity of the quantity distribution with respect to the fiber length according to curve T of FIG. 4 is now combined with the regularity of the quantity distribution with regard to the elastic modulus according to curve U of FIG. This means that predetermined proportions of fibers with regard to fiber length and modulus of elasticity of the different materials are selected for optimal reinforcement.
  • the fibers are usually produced by dividing or cutting a film (for example in the case of plastic fibers), so that either the closed fiber network, open fiber networks or individual fibers are produced, or continuously (for example in the case of steel fibers or glass fibers) manufactured wires are cut.
  • the fiber structures can now be twisted before cutting to produce the fibers of a predetermined length (the wires are twisted before cutting or are connected to one another by means of adhesives), so that there are several cord-shaped structures different in terms of the material. All these cord-like structures are then twisted together again, so that a thicker cord made of the different reinforcement materials is present, which cord is then finally cut into individual pieces.
  • these pieces of cord retain their shape due to the pretension, friction etc. imparted during twisting, or water-soluble adhesives are used.
  • the number of twists, the adhesive, etc. is predetermined from tests and selected such that the reinforcement cords can be entered into the concrete mixing machine together with the additives, and after the standardized concrete mixing time has ended due to the self-distributing fiber network that is always present, uniform over the Cross section of the reinforced concrete body are distributed.
  • the fiber reinforcement described also for tar and Bitumen coverings can be used to prevent large cracks from forming and to generate a crack pattern from fine cracks, into which cracks no water can enter and freeze therein, so that frost damage can largely be prevented on roads etc.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Reinforced Plastic Materials (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Road Paving Structures (AREA)

Claims (6)

1. Armature fibreuse pour éléments de construction et revêtements à liant de ciment ou de bitume, cette armature comportant au moins deux groupes de structures fibreuses ayant des fibres de longueurs différentes, et l'un de ces groupes étant constitué par un certain nombre de réseaux fibreux ayant chacun la forme d'un réseau fermé, en fibres de polypropylène élastiques ayant une première longueur; les groupes de structures fibreuses se présentant sous une forme ramassée avant leur introduction dans le mélange de préparation de l'élément considéré; cette armature étant caractérisée en ce que l'autre groupe de structures fibreuses est constitué par des fibres séparées ayant une seconde longueur, ou par un autre ensemble de réseaux fibreux séparés, formés de fibres ayant une seconde longueur; cette seconde longueur des fibres étant différente de la première longueur; et en ce que la répartition en pourcentage des structures fibreuses ayant des fibres des différentes longueurs est identique à la répartition en pourcentage des granulats de différents calibres utilisés dans le mélange de préparation.
2. Armature fibreuse selon la revendication 1, caractérisée en ce que les structures fibreuses présentent différents modules d'élasticité, et ce que la répartition en pourcentage des groupes de structures fibreuses ayant différents modules d'élasticité est identique à la répartition en pourcentage des granulats de différents calibres utilisés dans le mélange de préparation.
3. Armature fibreuse selon la revendication 1, caractérisée en ce qu'elle comporte deux groupes de structures fibreuses, le premier groupe étant constitué par un réseau fermé en fibres élastiques de polypropylène et le second groupe contenant des fibres d'acier.
4. Armature fibreuse selon la revendication 1, dans laquelle l'un des groupes de structures fibreuses est constitué par un réseau fermé en fibres élastiques de polypropylène, caractérisée en ce qu'au moins un autre groupe de structures fibreuses contient des fibres de verre, et/où des fibres d'acier, et/ou des fibres en matière synthétique, et/ou des fibres de carbone, et/ou des fibres d'amiante, et/ou des fibres naturelles.
5. Armature fibreuse selon la revendication 1, caractérisée en ce que tous les groupes de structures fibreuses sont reliés entre eux avant leur introduction dans le mélange de préparation.
6. Armature fibreuse selon la revendication 5, caractérisée en ce que les structures fibreuses sont torsadées ensemble.
EP80101468A 1979-05-03 1980-03-20 Armature fibreuse pour éléments de construction et revêtements à liant de ciment ou de bitume Expired EP0018491B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80101468T ATE4337T1 (de) 1979-05-03 1980-03-20 Faserfoermige bewehrung fuer zement- und bitumengebundene bauteile und belaege.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH415379A CH640593A5 (de) 1979-05-03 1979-05-03 Faserfoermige bewehrung fuer zement- und bitumengebundene bauteile.
CH4153/79 1979-05-03

Publications (3)

Publication Number Publication Date
EP0018491A2 EP0018491A2 (fr) 1980-11-12
EP0018491A3 EP0018491A3 (en) 1981-01-07
EP0018491B1 true EP0018491B1 (fr) 1983-07-27

Family

ID=4270796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101468A Expired EP0018491B1 (fr) 1979-05-03 1980-03-20 Armature fibreuse pour éléments de construction et revêtements à liant de ciment ou de bitume

Country Status (5)

Country Link
US (1) US4346135A (fr)
EP (1) EP0018491B1 (fr)
AT (1) ATE4337T1 (fr)
CH (1) CH640593A5 (fr)
DE (1) DE3064358D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4662946A (en) * 1982-10-05 1987-05-05 Mercer Frank B Strengthening a matrix
US7168232B2 (en) * 2001-02-21 2007-01-30 Forta Corporation Fiber reinforcement material, products made thereform, and method for making the same
US6753081B1 (en) 2001-02-21 2004-06-22 Forta Corporation Fiber reinforcement material, products made therefrom, and method for making the same
US20090075073A1 (en) * 2006-11-13 2009-03-19 Biddle Daniel T Light weight concrete product containing synthetic fibers
US8114514B1 (en) * 2009-08-12 2012-02-14 Forta Corporation Reinforcement composition and method thereof
US9321686B2 (en) 2013-03-15 2016-04-26 Forta Corporation Reinforcement fiber coating compositions, methods of making and treating, and uses for improved adhesion to asphalt and portland cement concrete
KR102003670B1 (ko) * 2018-08-03 2019-07-25 한국건설기술연구원 텍스타일 그리드 고정장치를 이용한 텍스타일 보강 콘크리트 구조물 및 그 시공방법
AU2019240725B1 (en) * 2019-10-07 2020-08-27 Duy Huu Nguyen Fiber-reinforced concrete – guided distribution methods for fibers in conventional construction

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133928A (en) * 1972-03-22 1979-01-09 The Governing Council Of The University Of Toronto Fiber reinforcing composites comprising portland cement having embedded therein precombined absorbent and reinforcing fibers
GB1429167A (en) * 1972-03-22 1976-03-24 Univ Toronto fibre reinforced composites
US4021258A (en) * 1972-09-25 1977-05-03 Teijin Limited Concrete structure and method of preparing same
CH574025A5 (fr) * 1974-01-24 1976-03-31 Arnheiter Ag Forta Seilwerke
CA1056178A (fr) * 1976-01-19 1979-06-12 Morris Schupack Panneaux armes de construction et methode de fabrication connexe
NO781562L (no) * 1977-05-05 1978-11-07 Eternit Fab Dansk As Fiberarmerte bygningsprodukter.

Also Published As

Publication number Publication date
EP0018491A3 (en) 1981-01-07
EP0018491A2 (fr) 1980-11-12
CH640593A5 (de) 1984-01-13
US4346135A (en) 1982-08-24
ATE4337T1 (de) 1983-08-15
DE3064358D1 (en) 1983-09-01

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