EP0141795A1 - Supporting element for railway rails reinforced with a discontinuous reinforcement - Google Patents

Supporting element for railway rails reinforced with a discontinuous reinforcement Download PDF

Info

Publication number
EP0141795A1
EP0141795A1 EP84870111A EP84870111A EP0141795A1 EP 0141795 A1 EP0141795 A1 EP 0141795A1 EP 84870111 A EP84870111 A EP 84870111A EP 84870111 A EP84870111 A EP 84870111A EP 0141795 A1 EP0141795 A1 EP 0141795A1
Authority
EP
European Patent Office
Prior art keywords
matrix
fibers
reinforcement
concrete
diameter
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Withdrawn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
EP84870111A
Other languages
German (de)
French (fr)
Inventor
Kazimierz Gamski
Edward Oledzki
Etienne Berleur
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.)
Les Entreprises Sbbm Et Six Construct
Original Assignee
Les Entreprises Sbbm Et Six Construct
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
Priority claimed from BE211431A external-priority patent/BE897632A/en
Application filed by Les Entreprises Sbbm Et Six Construct filed Critical Les Entreprises Sbbm Et Six Construct
Publication of EP0141795A1 publication Critical patent/EP0141795A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
    • E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
    • E01B3/32—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement
    • 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 present invention relates to concrete elements intended to serve as a support for rail tracks.
  • the railway rail sleepers are the most representative.
  • the ratio of the loads exerted by the rails on concrete and wooden sleepers is of the order of 1.17 to 1.28.
  • the stresses measured in the ballast of a track with concrete sleepers are approximately 30 to 50% higher than the stresses measured in the ballast of a track with wooden sleepers.
  • a major drawback of concrete sleepers is that their greater flexural rigidity significantly deteriorates passenger comfort and has a negative influence on track maintenance.
  • rubber or other elastic materials are sometimes placed under the rails, but such a solution is not very economical.
  • the object of the invention is to produce a support element for reinforced concrete rails which has elastic properties such that it has a deformability in traction and in bending comparable to that of wooden sleepers and whose internal structure does not not promote deterioration due to the propagation of vibrations.
  • the composite material according to the invention that is to say a concrete reinforced with fibers dispersed in the mass, can itself serve as a second-order matrix in which another reinforcement is incorporated.
  • the advantage of the support element according to the invention is that it has a flexural rigidity of the same order of magnitude as that of traditional wooden sleepers and in addition a high resistance to dynamic stresses generated by the passage of convoys on the rails.
  • the support element according to the invention can advantageously be produced with a dimension in the axial direction of the railroad, much larger than that of traditional sleepers.
  • the support element according to the invention also has the advantage of being able to be manufactured using simple and safe technology.
  • the value of the constant C is 4 (the diameter of the fibers being expressed in centimeters).
  • the fibers can be simply added to the constituents of the matrix concrete during the mixing operation thereof, which is a relatively simple and inexpensive operation.
  • Such a manufacturing process is much simpler and more economical than conventional manufacturing processes.
  • the composite material made up, according to the invention, of a matrix and a discontinuous reinforcement formed of fibers dispersed in the mass can itself serve as a second order matrix for the incorporation of a traditional reinforcement (classic or prestressing).
  • a traditional reinforcement classic or prestressing
  • the discontinuous reinforcement dispersed in the mass before being placed in the mold constitutes at least an appreciable part (at least 30%) of the entire reinforcement of the element d 'support.
  • the concrete element according to the invention has the advantage of allowing a simplified, safe and economical manufacturing technology.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforced Plastic Materials (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The supporting element consists of a composite material comprising a concrete matrix and fibres which are dispersed virtually uniformly in the matrix in a quantity which is determined as a function of the diameter of the fibres by the relationship P*/d C, in which: P* is the content by volume of the fibres in the concrete matrix multiplied by the apparent efficiency coefficient of the fibres; d is the diameter of the fibres; C is a limiting constant characteristic of the matrix material. The reinforced matrix of the discontinuous reinforcement may constitute a second order matrix for a complementary reinforcement.

Description

La présente invention concerne de éléments en béton destinés à servir d'appui aux rails de voies ferrées. Parmi ces éléments d'appui, les traverses de rails de chemins de fer sont les plus représentatives.The present invention relates to concrete elements intended to serve as a support for rail tracks. Among these supporting elements, the railway rail sleepers are the most representative.

Pour supporter les rails de roulement on utilise traditionnellement des traverses en bois, mais durant les dernière décennies on a commencé à utiliser des traverses en béton armé ou précontraint qui ont une longévité plus grande. Un inconvénient majeur des traverses en béton est leur rigidité considérablement plus élevée que celle des traverses en bois, ce qui provoque dans les traverses et le ballast des sollicitations dyna- miques beaucoup plus grandes sous l'action des charges dynamiques exercées sur les rails. D'après les essais effectués, le coefficient de suspension d'une voie est égal à K = 12.103 N/m avec des traverses en bois et K = 18.103 N/m avec des traverses en béton. Le rapport des charges exercées par les rails sur des traverses en béton et en bois est de l'ordre de 1,17 à 1,28. Les contraintes mesurées dans le ballast d'une voie avec traverses en béton sont approximativement de 30 à 50% plus élevées que les contraintes mesurées dans le ballast d'une voie avec traverses en bois.To support the running rails we traditionally use wooden sleepers, but during the last decades we have started to use reinforced or prestressed concrete sleepers which have a longer service life. A major disadvantage of concrete sleepers is their significantly higher stiffness than wooden sleepers, resulting in ties and ballast of dy- mid solicitations q ues much larger under the influence of dynamic loads on the rails . According to the tests carried out, the suspension coefficient of a track is equal to K = 12.10 3 N / m with wooden sleepers and K = 18.10 3 N / m with concrete sleepers. The ratio of the loads exerted by the rails on concrete and wooden sleepers is of the order of 1.17 to 1.28. The stresses measured in the ballast of a track with concrete sleepers are approximately 30 to 50% higher than the stresses measured in the ballast of a track with wooden sleepers.

Un inconvénient majeur des traverses en béton est que leur plus grande rigidité à la flexion détériore sensiblement le confort des voyageurs et influence de façon négative l'entretien des voies. Afin de diminuer la rigidité des voies avec traverses en béton on place parfois sous les rails, des semelles en caoutchouc ou en un autre matériau élastique, mais une telle solution est peu économique.A major drawback of concrete sleepers is that their greater flexural rigidity significantly deteriorates passenger comfort and has a negative influence on track maintenance. In order to reduce the rigidity of the tracks with concrete sleepers, rubber or other elastic materials are sometimes placed under the rails, but such a solution is not very economical.

Un autre inconvénient majeur des traverses en béton armé d'une armature continue réside dans le fait que les vibrations engendrées par les convois se déplaçant à des vitesses différentes provoquent une altération de l'adhérence entre l'armature et le béton, ce qui affecte la longévité des traverses.Another major drawback of reinforced concrete sleepers with a continuous reinforcement lies in the fact that the vibrations generated by the convoys moving at different speeds cause an alteration in the adhesion between the reinforcement and the concrete, which affects the longevity of sleepers.

L'invention a pour but de réaliser un élément d'appui de rails en béton armé qui possède des propriétés élastiques telles qu'il présente une déformabilité à la traction et à la flexion comparable à celle des traverses en bois et dont la structure interne ne favorise pas la détérioration due à la propagation des vibrations.The object of the invention is to produce a support element for reinforced concrete rails which has elastic properties such that it has a deformability in traction and in bending comparable to that of wooden sleepers and whose internal structure does not not promote deterioration due to the propagation of vibrations.

Ce but est atteint par un élément d'appui de rails de voie ferrée constitué d'un matériau composite comprenant une matrice en béton et une armature discontinue constituée de fibres dispersées quasi-uniformément dans la matrice en une quantité déterminée en fonction du diamètre des fibres par la relation

Figure imgb0001
où

  • P* est la teneur en volume des fibres dans la matrice en béton (%), multipliée par le coefficient d'efficacité apparent des fibres;
  • d est le diamètre des fibres;
  • C est une constante limite caractéristique du matériau de la matrice.
This object is achieved by a support element for rail tracks made of a composite material comprising a concrete matrix and a discontinuous reinforcement consisting of fibers dispersed almost uniformly in the matrix in a quantity determined according to the diameter of the fibers. by relationship
Figure imgb0001
 or
  • P * is the volume content of the fibers in the concrete matrix (%), multiplied by the apparent efficiency coefficient of the fibers;
  • d is the diameter of the fibers;
  • C is a limiting constant characteristic of the material of the matrix.

Dans une variante de réalisation, le matériau composite selon l'invention, c'est-à-dire un béton renforcé de fibres dispersées dans la masse, peut lui-même servir de matrice de second ordre à laquelle est incorporée une autre armature.In an alternative embodiment, the composite material according to the invention, that is to say a concrete reinforced with fibers dispersed in the mass, can itself serve as a second-order matrix in which another reinforcement is incorporated.

L'avantage de l'élément d'appui selon l'invention est qu'il présente une rigidité à la flexion du même ordre de grandeur que celle des traverses en bois traditionnelles et en outre une résistance élevée aux sollicitations dynamiques engendrées par le passage des convois sur les rails. En outre, en raison de ses propriétés de déformabilité et de résistance, l'élément d'appui selon l'invention peut être avantageusement réalisé avec une dimension suivant la direction axiale de la voie ferrée, largement plus grande que celle des traverses traditionnelles.The advantage of the support element according to the invention is that it has a flexural rigidity of the same order of magnitude as that of traditional wooden sleepers and in addition a high resistance to dynamic stresses generated by the passage of convoys on the rails. In addition, because of its deformability and strength properties, the support element according to the invention can advantageously be produced with a dimension in the axial direction of the railroad, much larger than that of traditional sleepers.

L'élément d'appui selon l'invention a également pour avantage de pouvoir être fabriqué moyennant une technologie simple et sûre.The support element according to the invention also has the advantage of being able to be manufactured using simple and safe technology.

L'invention est exposée plus en détails dans ce qui suit.The invention is set out in more detail below.

Après avoir choisi la composition du béton devant constituer la matrice de l'élément d'appui en fonction de la résistance à la traction souhaitée, on en mélange les composants et les fibres de l'armature discontinue en sorte de former un matériau composite macroscopi- quement homogène et isotrope. La quantité de fibres dispersées est déterminée en fonction du diamètre des fibres par la relation :

Figure imgb0002
où

  • P* est la teneur en volume des fibres dans la matrice en béton (%) multipliée par le coefficient d'efficacité apparent des fibres;
  • d est le diamètre des fibres;
  • C est une constante limite caractéristique du matériau de la matrice.
After having chosen the composition of the concrete which should constitute the matrix of the support element as a function of the desired tensile strength, the components and the fibers of the discontinuous reinforcement are mixed so as to form a macroscopic composite material. only homogeneous and isotropic. The amount of fiber dispersed is determined according to the diameter of the fibers by the relation:
Figure imgb0002
 or
  • P * is the volume content of the fibers in the concrete matrix (%) multiplied by the apparent efficiency coefficient of the fibers;
  • d is the diameter of the fibers;
  • C is a limiting constant characteristic of the material of the matrix.

Le coefficient d'efficacité apparent des fibres est défini comme étant une fonction de la forme des fibres et de leur état de surface (décisif pour leur ancrage dans la matrice), du rapport diamètre/longueur des fibres, de leur nombre par unité de volume, de leur orientation par rapport à la direction des sollicitations et de l'armature complémentaire caractérisée par sa nature, son diamètre, sa quantité et son orientation. Le coefficient d'efficacité apparent e des fibres est le rapport des efforts repris par les fibres:

Figure imgb0003
où

  • n' est le nombre effectif de fibres dans la section considérée A perpendiculaire à la direction de l'effort;
  • F' iγ est l'effort repris par une fibre i inclinée d'un angle γ par rapport à la direction de l'effort;
  • F' o est l'effort repris par une fibre inclinée d'un angle γ = o;
  • nA est le nombre nominal de fibres dans la section considérée A perpendiculaire à la direction de l'effort
    Figure imgb0004
    où A' est la section transversale d'une fibre).
The apparent efficiency coefficient of the fibers is defined as being a function of the shape of the fibers and their surface condition (decisive for their anchoring in the matrix), the diameter / length ratio of the fibers, their number per unit of volume. , their orientation relative to the direction of the stresses and the additional reinforcement characterized by its nature, its diameter, its quantity and its orientation. The apparent efficiency coefficient of the fibers is the ratio of the forces taken up by the fibers:
Figure imgb0003
 or
  • n 'is the effective number of fibers in the section considered A perpendicular to the direction of the force;
  • F ' iγ is the effort taken up by a fiber i inclined at an angle γ with respect to the direction of the effort;
  • F ' o is the force taken up by a fiber inclined at an angle γ = o;
  • n A is the nominal number of fibers in the section considered A perpendicular to the direction of the effort
    Figure imgb0004
     where A 'is the cross section of a fiber).

Pour des fibres d'acier dispersées dans une matrice en béton, par exemple, il a été déterminé que la valeur de la constante C est 4 (le diamètre des fibres étant exprimé en centimètres).For steel fibers dispersed in a concrete matrix, for example, it has been determined that the value of the constant C is 4 (the diameter of the fibers being expressed in centimeters).

La relation indiquée ci-dessus n'est économiquement valable que pour une armature discontinue de petit diamètre (d < 1 cm). De plus, il est indispensable que l'accroissement de la déformabilité en flexion du matériau composite soit accompagné d'une résistance adéquate à la fissuration et à la fatigue. La dispersion de fines fibres métalliques et la composition adéquate du béton constituant la matrice contribuent aussi à l'augmentation de la résistance aux sollicitations dynamiques et aux chocs.The relation indicated above is economically valid only for a discontinuous reinforcement of small diameter (d <1 cm). In addition, it is essential that the increase in the flexural deformability of the composite material is accompanied by adequate resistance to cracking and fatigue. The dispersion of fine metallic fibers and the appropriate composition of the concrete constituting the matrix also contribute to the increase in resistance to dynamic stresses and impacts.

Les fibres peuvent être simplement ajoutées aux constituants du béton de le matrice pendant l'opération de malaxage de celui-ci, ce qui est une opération relativement simple et peu coùteuse. Le mélange du matériau de la matrice et des fibres étant effectué, on le met en place dans un moule, puis on procède au compactage. Un tel procédé de fabrication est bien plus simple et plus économique que les procédés de fabrication classiques.The fibers can be simply added to the constituents of the matrix concrete during the mixing operation thereof, which is a relatively simple and inexpensive operation. The mixing of the matrix material and the fibers being carried out, it is placed in a mold, then the compaction is carried out. Such a manufacturing process is much simpler and more economical than conventional manufacturing processes.

Le matériau composite constitué, selon l'invention, d'une matrice et d'une armature discontinue formée de fibres dispersées dans la masse, peut lui-même servir de matrice de second ordre pour l'incorporation d'une armature traditionnelle (classique ou précontrainte). Dans ce cas, il est avantageux ou nécessaire que l'armature discontinue dispersée dans la masse avant la mise en place dans le moule constitue au moins une partie appréciable (au moins 30%) de la totalité de l'armature de l'élément d'appui.The composite material made up, according to the invention, of a matrix and a discontinuous reinforcement formed of fibers dispersed in the mass, can itself serve as a second order matrix for the incorporation of a traditional reinforcement (classic or prestressing). In this case, it is advantageous or necessary that the discontinuous reinforcement dispersed in the mass before being placed in the mold constitutes at least an appreciable part (at least 30%) of the entire reinforcement of the element d 'support.

A titre d'exemple, des traverses de voie ferrée ont été réalisées expérimentalement selon l'invention avec les particularités suivantes :

  • a. la matrice de premier ordre est constituée de béton conçu de façon à obtenir une résistance à la traction élevée;
  • b. l'armature discontinue est constituée de fibres d'acier Bekaert type ZC-60/80;
  • c. l'armature complémentaire est constituée d'acier Be-50 de 1cm de diamètre;
  • d. les traverses ont comme dimensions principales :
    Figure imgb0005
By way of example, railway sleepers have been made experimentally according to the invention with the following particularities:
  • at. the first-order matrix is made of concrete designed to achieve high tensile strength;
  • b. the discontinuous reinforcement consists of Bekaert steel fibers type ZC-60/80;
  • vs. the additional reinforcement is made of Be-50 steel 1cm in diameter;
  • d. the sleepers have as main dimensions:
    Figure imgb0005

Le tableau ci-dessous donne à titre de comparaison la rigidité à la flexion des traverses selon l'invention et la rigidité de traverses classiques :

Figure imgb0006
The table below gives by comparison the bending stiffness of the crosspieces according to the invention and the stiffness of conventional crosspieces:
Figure imgb0006

Ces résultats montrent que la déformabilité d'un élément d'appui en béton armé de fibres selon l'invention est du même ordre de grandeur que celle d'un élément en bois.These results show that the deformability of a fiber reinforced concrete support element according to the invention is of the same order of magnitude as that of a wooden element.

Outre ses avantages de déformabilité comparable à celle des traverses en bois et de résistance accrue aux sollicitations dynamiques, l'élément en béton selon l'invention a l'avantage de permettre une technologie de fabrication simplifiée, sûre et économique.Besides its advantages of deformability comparable to that of wooden sleepers and increased resistance to dynamic stresses, the concrete element according to the invention has the advantage of allowing a simplified, safe and economical manufacturing technology.

Claims (5)

1. Elément d'appui pour rails de voie ferrée constitué d'un matériau composite comprenant une matrice en béton et des fibres dispersées quasi-uniformément dans la matrice, caractérisé en ce que les fibres sont dispersées en une quantité déterminée en fonction du diamètre des fibres par la relation
Figure imgb0007
où P* est la teneur en volume des fibres dans la matrice en béton (%) multipliée par le coefficient d'efficacité apparent des fibres; d est le diamètre des fibres; C est une constante limite caractéristique du matériau de la matrice. 1. Support element for rail tracks made of a composite material comprising a concrete matrix and fibers dispersed almost uniformly in the matrix, characterized in that the fibers are dispersed in an amount determined according to the diameter of the fibers by relationship
Figure imgb0007
 or P * is the volume content of the fibers in the concrete matrix (%) multiplied by the apparent efficiency coefficient of the fibers; d is the diameter of the fibers; C is a limiting constant characteristic of the material of the matrix. 2. Elément d'appui selon la revendication 1, dans lequel les fibres sont des fibres d'acier de diamètre inférieur à 1cm, dispersées dans une matrice en béton en une quantité telle que soit vérifiée la relation:
Figure imgb0008
(le diamètre des fibres étant exprimé en centimètres).2. Support element according to claim 1, in which the fibers are steel fibers of diameter less than 1 cm, dispersed in a concrete matrix in an amount such that the relationship is verified:
Figure imgb0008
 (the diameter of the fibers being expressed in centimeters). 3. Elément d'appui selon l'une quelconque des revendications 1 et 2, caractérisé en ce que la matrice renforcée de l'armature discontinue constitue la matrice de second ordre pour une armature complémentaire.3. Support element according to any one of claims 1 and 2, characterized in that the reinforced matrix of the discontinuous reinforcement constitutes the second-order matrix for a complementary reinforcement. 4. Elément d'appui selon la revendication 3, caractérisé en ce que l'armature discontinue dispersée dans la masse constitue au moins 30% de la totalité de l'armature de l'élément.4. Support element according to claim 3, characterized in that the discontinuous reinforcement dispersed in the mass constitutes at least 30% of the entire reinforcement of the element. 5. Elément d'appui selon l'une quelconque des revendications 1 à 4, dans lequel l'armature discontinue est introduite dans la matrice avant la mise en place du mélange dans un moule.5. Support element according to any one of claims 1 to 4, in which the discontinuous reinforcement is introduced into the matrix before the mixture is placed in a mold.
EP84870111A 1983-08-31 1984-08-07 Supporting element for railway rails reinforced with a discontinuous reinforcement Withdrawn EP0141795A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE211431 1983-08-31
BE211431A BE897632A (en) 1983-08-31 1983-08-31 Bearing traverse for railway track rails - has discontinuous reinforcement in concrete giving traverse elasticity

Publications (1)

Publication Number Publication Date
EP0141795A1 true EP0141795A1 (en) 1985-05-15

Family

ID=3843677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84870111A Withdrawn EP0141795A1 (en) 1983-08-31 1984-08-07 Supporting element for railway rails reinforced with a discontinuous reinforcement

Country Status (4)

Country Link
EP (1) EP0141795A1 (en)
JP (1) JPS6085101A (en)
ES (1) ES8506129A1 (en)
PT (1) PT79109B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418312A1 (en) * 1988-05-13 1991-03-27 John H Allen Load bearing concrete panel.
ES2076129A1 (en) * 1992-05-08 1995-10-16 Bekaert Sa Nv Steel fibre reniforced concrete with high flexural strength

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6114526A (en) 1996-07-01 2000-09-05 Dr. Reddy's Research Foundation Heterocyclic compounds, process for their preparation and pharmaceutical compositions containing them and their use in the treatment of diabetes and related diseases

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB252975A (en) * 1925-10-23 1926-06-10 Alexander George Rotinoff Improvements relating to reinforced concrete
FR1377907A (en) * 1963-12-23 1964-11-06 Battelle Development Corp A two-phase material formed by concrete and steel and method of making this material
DE1941223A1 (en) * 1969-08-13 1971-02-25 Hendrix Hans Dr Building material
FR2145293A5 (en) * 1971-07-06 1973-02-16 Battelle Development Corp
FR2174750A1 (en) * 1972-03-09 1973-10-19 Conflandey Forges Trefil
BE860154A (en) * 1977-10-26 1978-02-15 Gamski Kazimierz CONCRETE RAILWAY CROSSBODY REINFORCED WITH DISCONTINUOUS THIN STEEL FIBER REINFORCEMENT

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB252975A (en) * 1925-10-23 1926-06-10 Alexander George Rotinoff Improvements relating to reinforced concrete
FR1377907A (en) * 1963-12-23 1964-11-06 Battelle Development Corp A two-phase material formed by concrete and steel and method of making this material
DE1941223A1 (en) * 1969-08-13 1971-02-25 Hendrix Hans Dr Building material
FR2145293A5 (en) * 1971-07-06 1973-02-16 Battelle Development Corp
FR2174750A1 (en) * 1972-03-09 1973-10-19 Conflandey Forges Trefil
BE860154A (en) * 1977-10-26 1978-02-15 Gamski Kazimierz CONCRETE RAILWAY CROSSBODY REINFORCED WITH DISCONTINUOUS THIN STEEL FIBER REINFORCEMENT

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418312A1 (en) * 1988-05-13 1991-03-27 John H Allen Load bearing concrete panel.
EP0418312A4 (en) * 1988-05-13 1991-08-07 John H. Allen Load bearing concrete panel
ES2076129A1 (en) * 1992-05-08 1995-10-16 Bekaert Sa Nv Steel fibre reniforced concrete with high flexural strength

Also Published As

Publication number Publication date
JPS6085101A (en) 1985-05-14
ES535524A0 (en) 1985-07-01
ES8506129A1 (en) 1985-07-01
PT79109B (en) 1986-06-03
PT79109A (en) 1984-09-01

Similar Documents

Publication Publication Date Title
EP0432001B1 (en) Root pin for a dental prosthesis made from composite material and its procedure of manufacture
LU82723A1 (en) JOINT FOR EXPANSION OF ART WORKS AND FIXING METHOD THEREOF
JPH09501748A (en) High performance fiber composite wire fastening system
FR2947577A1 (en) METAL CABLE WITH THREE LAYERS GUM IN SITU CONSTRUCTION 3 + M + N
FR2491917A1 (en) MOLDED PIECES OF CEMENT FIBER-REINFORCED
EP3983188B1 (en) Method for manufacturing an anisotropic fibrous concrete
EP0141795A1 (en) Supporting element for railway rails reinforced with a discontinuous reinforcement
FR2537988A1 (en) ANCHOR AGENT
BE483753A (en)
FR2672252A1 (en) ONE-PIECE SYNTHETIC RESIN WHEEL.
BE897632A (en) Bearing traverse for railway track rails - has discontinuous reinforcement in concrete giving traverse elasticity
BE1009805A5 (en) Traverse way for railway.
EP0465390B1 (en) Railway track
WO2004033770A1 (en) Method for profiled cement-based products and reinforcing fibers therefor
EP2126216B1 (en) Insulating anti-corrosive rail clamp integrally made of a polymeric composition
DE2904147C2 (en) Method for anchoring the tension members made of high-strength steel wires of suspension bridges, cable-stayed bridges and the like.
EP1025312B1 (en) Stabilised structure, in particular ballast type and method for stabilising such a structure
EP0671502A1 (en) Wires, strands, cables and stays sheathed in a shrinkable polymer and their method of manufacture
CA3043366A1 (en) Railroad tie and associated fabrication process
BE1004245A3 (en) ROAD COATING COMPOSITION AND METHOD FOR MANUFACTURING A COVERING.
CA2018844A1 (en) Mineral fibre composite material used for the production of molded parts
DE102011117833B4 (en) Guiding and supporting elements for traction and suspension elements in conveyor technology and method for their production
FR2666601A1 (en) MULTILAYER COATING FOR METAL ART WORKS.
EP3728762A1 (en) Method for reinforcing a civil engineering structure
EP2011909A1 (en) Hybrid yarn designed for reinforcing plaques

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19851111

17Q First examination report despatched

Effective date: 19860814

D17Q First examination report despatched (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870706

RIN1 Information on inventor provided before grant (corrected)

Inventor name: OLEDZKI, EDWARD

Inventor name: BERLEUR, ETIENNE

Inventor name: GAMSKI, KAZIMIERZ