Classifications

• • 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
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G23/00—Working measures on existing buildings
  • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
  • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G23/00—Working measures on existing buildings
  • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
  • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
  • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G23/00—Working measures on existing buildings
  • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
  • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
  • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
  • E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off

Definitions

• the present invention relates to a connection element for the building industry, a method for consolidating a structural and non-structural element, and a related installation kit.
• the present invention relates to a method for consolidating a structural and non-structural element such as, for example, structures made of masonry, concrete, wood, steel, etc. with a connection element for the building industry and a related installation kit.
• matrix and the term binding agent will be used indifferently to indicate the same material.
• the meshes are embedded inside a mortar with binding agents, which may be of different types, and are used for consolidating existing structures (masonry, concrete, etc.) creating a reinforced plaster to be applied on the surfaces, or as slabs for manufacturing load bearing floor slabs.
• the mesh may be blocked in position by means of the use of junction elements inserted in holes made in the masonry.
• the preformed junction elements or connectors are generally made of metal and have an L-shape, in which the two sides are substantially perpendicular to each other.
• an anchoring resin has been distributed inside the hole, one side is inserted into the hole obtained in the masonry, while the other side is arranged parallel to the surface of the masonry.
• Mesh and junction elements are therefore embedded inside a plaster with binding agents which may be of different types.
• connection elements made with preformed bars of composite material comprising fibres and hardened resin are known.
• the bar is obtained by means of a method called pultrusion, in which the fibres are picked up and passed through a resin impregnation bath. At the exit of the impregnation area, the impregnated fibres pass through a die so as to give the manufactured item a specific cross section, compacting the fibres together. The impregnated fibres are then passed inside a curing furnace which provides heat so that the resin may polymerize and therefore harden.
• an area may be arranged for the automated cutting of the pultruded bars.
• Bars made of composite material offer many advantages. For example, with respect to bars made of metal, they are lighter and are not subject to oxidation.
• the main limitation of the pultruded bars is that they may not be bent on site, for example in the case in which an anchorage is to be made through the masonry between two reinforcement plates.
• the end of the bar after the pultrusion process, is subjected to a solvent bath and/or a pyrolysis at a high temperature to eliminate the resinous matrix and keep the fibre dry.
• the bars thus obtained may be inserted inside a hole obtained in the masonry, while the end composed of free fibres is widened radially and embedded in the mortar with which the surface of the masonry is coated. Thereby, the unravelled end ensures the grip between the bar and the mortar.
• the radial distribution is not sufficient to ensure an effective gripping of the fibres inside the binding agent used to coat the surface of the masonry.
• the fibres which are freed from the hardened resin have different, in particular worse, properties with respect to the intact bar, but also with respect to the fibres before the impregnation step.
• connection element for the building industry which allows for a sufficient grip to be provided, even in extreme conditions.
• need is felt to provide a connection element for the building industry, which may be adapted to different conditions of use.
• connection element for the building industry which may be easily used for joining, through a through hole in the masonry, two reinforcement plates arranged on the walls of the masonry.
• connection element for the building industry according to claim 1 by a method for consolidating a masonry with a connection element for the building industry according to claim 9, and by a related installation kit according to claim 11.
• FIG. 1 diagrammatically shows a first embodiment of a connection element according to the present invention
• FIG. 1 diagrammatically shows an alternative embodiment of the connection element according to the present invention
• FIG. 3 diagrammatically shows a possible embodiment of a connection element according to the present invention
• FIG. 6 diagrammatically shows a possible operating configuration of the connection element according to the present invention, the section of which is shown in Figure 5;
• FIG. 7 diagrammatically shows a connection element according to the present invention in a possible condition of use;
• Figure 1 shows a connection element 12 according to the present invention.
• connection element 12 is made of composite material comprising a bundle of fibres 14 and a binding agent.
• connection element 12 comprises an insertion portion 16 having two ends 18, 20.
• the insertion portion 16 comprises a section of the bundle of fibres embedded in the binding agent to form a monolithic structure.
• a fixing portion 22, 24 is provided at at least one of the ends 18, 20.
• the fixing portion 22, 24 comprises fibres 14 overhanging from the insertion portion 16 and therefore partially embedded in the monolithic structure.
• the fibres 14 of the fixing portion 22, 24 are predisposed with anchorage means 26, 28 adapted to realize an anchorage between the fibres 14 of the fixing portion 22, 24 and a plaster and/or a reinforcement element and/or a binding agent-based matrix.
• the fibres 14 in the fixing portion 22, 24 have been embedded in the binding agent and then released.
• the fibres 14 in said fixing portion 22, 24 may be virgin or at least partially virgin.
• virgin fibres means fibres and/or portions thereof which have not been embedded in the resin.
• virgin fibres may also be defined as dry fibres.
• virgin fibres are fibres and/or portions thereof which have not been resin-embedded to form a monolithic structure.
• the bundle of fibres may comprise synthetic organic fibres, natural organic fibres, inorganic fibres, and/or metallic fibres. [0046]With reference to synthetic organic fibres, these may comprise, for example, aramid fibres, poly-para- phenyl benzobisoxazole (PBO), and/or polyester.
• synthetic organic fibres these may comprise, for example, aramid fibres, poly-para- phenyl benzobisoxazole (PBO), and/or polyester.
• Natural organic fibres may comprise, for example: cotton, hemp, flax, sisal, etc.
• the inorganic fibres may comprise, for example: glass, carbon, basalt, etc.
• the metallic fibres may comprise, for example: stainless steel, carbon steel, copper, brass.
• the bundle of fibres may comprise fibres of different types in the same bundle.
• the binding agent may be, for example, an organic or inorganic resin.
• thermosetting resin this may be of the thermosetting or thermoplastic type.
• thermosetting resin it may be chosen, for example, from the group comprising vinyl-ester resins, poly-ester resins, bisphenol resins, epoxy resins, etc.
• the fibres may be treated with surface additives to improve the durability thereof and the adhesion thereof with the resin and/or the matrix which may be organic, inorganic or of another type.
• the insertion portion 16 which in use is inserted inside a hole in the masonry, may have an outer surface with quartz sand and resin fillings, or an outer surface subjected to roughening by means of a mechanical processing or application of material.
• the length of the insertion portion 16 may range from 10 mm to 20000 mm.
• the length of the insertion portion 16 may be decided based on the thickness of the structural or non-structural element in which it must be inserted.
• the insertion portion 16 may have a substantially circular, rectangular, or square cross-section or a cross-section according to design specifications.
• the insertion portion 16 may be hollow for geotechnical or structural applications in general, in order to facilitate any filling through the inner volume of the connector (injection of grout or structural materials which are primordially fluid or semi-fluid).
• the diameter of the insertion portion 16 may range from 1 mm to 150 mm.
• the fixing portion 22, 24 may be arranged at one or both ends 18, 20 of the insertion portion. In particular the length of the fixing portion 22, 24 may range from 10 mm to 20000 mm.
• such fibres 14 of the fixing portion 22, 24 may be, for example, preliminarily primed or soaked in an organic or inorganic matrix and/or a matrix of another type in order to improve the mechanical behaviour thereof.
• the anchorage means 26, 28 may be arranged in a position distal with respect to the insertion portion (16).
• the anchorage means 26, 28 may comprise, for example, spherical, circular, cylindrical, drop-like, polyhedral shapes.
• the anchorage means 26, 28 may also have generic shapes.
• the surface of the anchorage means 26, 28 may be smooth or rough, to allow an adequate chemical and/or mechanical collaboration with the structural or non-structural element on which it is connected/inserted.
• the anchorage means 26, 28 may be made of different materials depending on the purposes. [0066]For example, they may be made of polymeric, binding, metallic material, etc.
• the anchorage means may also be made of wood.
• the fixing portion 22, 24 comprises fibres 14 which may be folded so that the end thereof may also be spliced with at least one fibre 14 close to the insertion portion 16.
• the junction may be made both in a continuous production line as well as, in a second step, for example, by crimping with plastic and/or metal rings, manual and/or automatic gluing.
• anchorage means 26, 28 which comprise anchoring rings 262, 264, 266, 268.
• anchorage means 26, 28 which comprise anchoring rings 262, 264, 266, 268.
• the fixing portion 22, 24 may be substantially flat and lie substantially parallel to the anchoring rings 262 , 264, 266, 268.
• the fixing portion 22, 24 may be substantially flat, as in the previous case, but it may comprise two superimposed branches 221, 222.
• the two branches 221, 222 may be spread apart from each other according to two different directions, as shown in the example of Figure 6.
• connection element 12 is inserted inside a hole made in the structural and/or non-structural element, and the fixing portion 22, 24 is bent towards the masonry and embedded in the plaster so that the anchorage means 26, 28 exert an additional anchoring action with respect to that exerted only by the fibres of the prior art, when immersed in a matrix.
• a method for making a connection element 12 out of composite material comprising fibres 14 and a resin-based binding agent according to the present invention will be described below. The method comprises the steps of:
• connection element 12 [0079]- cutting the connection element 12, forming an insertion portion 16 having two ends 18, 20 and a fixing portion 22, 24 at at least one of the ends 18, 20; and [0080]- arranging the anchorage means 26, 28 at at least one fixing portion 22, 24.
• the cutting may occur at a section of the bundle of fibres impregnated with resin, or at a section of the bundle of fibres 14 in which the fibres 14 comprise or consist of virgin fibres.
• connection element 12 may comprise the steps of: [0083]- providing a bundle of fibres 14;
• the step of impregnating with the binding agent may involve only some sections of the fibres, i.e., those which will constitute the insertion portion 16 of the connection element 12.
• the portions of the fibres which will form the fixing portions will be of the virgin type.
• the method may comprise a step in which a reinforcement mesh is provided on the surface of the masonry.
• the present invention also relates to an installation kit comprising an insertion funnel 40 adapted to facilitate the insertion of the connection element 12 inside a hole in a masonry.
• the insertion funnel 40 may also be used to guide the virgin fibres of the fixing portion at the curving area on the surface of the structural and/or non-structural element.
• the insertion funnel 40 may comprise a tubular portion 44, adapted to be inserted inside a hole, and a diverging portion.
• the insertion funnel 40 may be useful for positioning the fixing portions 22, 24 in order to improve the mechanical behaviour of the connection element, for example, by improving and increasing the extraction force.
• connection element according to the present invention with the related installation method and with the installation kit are therefore now evident.
• connection element which may be used to connect two plate-like resistant elements through a hole in a structural and/or non-structural element.
• the ends of the connector are both provided with a fixing portion.
• anchorage means embedded in the plaster or connected to reinforcement elements, such as, for example, a mesh in the resin, an anchorage is obtained, effectively ensuring a better performance of the tensile connector.
• connection element according to the present invention may be used, for example, as a connection system between reinforcement elements for the wall/resistant element which is required to increase the performance by means of a symmetrical or partially symmetrical reinforcement layout.
• the connector also acts as a tie rod, bracing and/or nail for geotechnics or slope stabilization (geotechnical works in general), the dry terminals/free ends thereof being possibly made on site with any geometric shape, by means of pre-moulding in the factory or direct pre-application on site, with or without the application of a mat to facilitate the creation of a junction plate or finally by providing a light primer already in the production step to improve the application steps, with the bracing and/or tie rod elements.
• bracket or reinforcement in general, continuous or discontinuous, for structural or non-structural elements in reinforced concrete, completing the construction steps in the factory (co-moulding or similar techniques) or on site.
• the particular production method allows to manufacture a product which maintains the mechanical resistance and stiffness properties of the connection in the anchorage area of the elements to be connected unaltered.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Mechanical Engineering (AREA)
• Joining Of Building Structures In Genera (AREA)
• Reinforcement Elements For Buildings (AREA)

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Applications Claiming Priority (2)

Publications (1)

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Citations (4)

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• 2019
  • 2019-12-18 IT IT102019000024499A patent/IT201900024499A1/it unknown
• 2020
  • 2020-12-17 WO PCT/IB2020/062098 patent/WO2021124190A1/en unknown
  • 2020-12-17 EP EP20839392.6A patent/EP4077830A1/en active Pending
  • 2020-12-17 US US17/787,170 patent/US20230015704A1/en active Pending
  • 2020-12-17 CA CA3165268A patent/CA3165268A1/en active Pending

Patent Citations (4)

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