EP3640407A1 - Non-tissé imprégné d'additifs - Google Patents

Non-tissé imprégné d'additifs Download PDF

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Publication number
EP3640407A1
EP3640407A1 EP18200952.2A EP18200952A EP3640407A1 EP 3640407 A1 EP3640407 A1 EP 3640407A1 EP 18200952 A EP18200952 A EP 18200952A EP 3640407 A1 EP3640407 A1 EP 3640407A1
Authority
EP
European Patent Office
Prior art keywords
scrim
impregnation
textile reinforcement
base material
producing
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.)
Granted
Application number
EP18200952.2A
Other languages
German (de)
English (en)
Other versions
EP3640407C0 (fr
EP3640407B1 (fr
Inventor
Detlef Koch
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.)
Koch GmbH
Original Assignee
Koch GmbH
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 Koch GmbH filed Critical Koch GmbH
Priority to EP18200952.2A priority Critical patent/EP3640407B1/fr
Priority to US16/655,611 priority patent/US20200123796A1/en
Publication of EP3640407A1 publication Critical patent/EP3640407A1/fr
Application granted granted Critical
Publication of EP3640407C0 publication Critical patent/EP3640407C0/fr
Publication of EP3640407B1 publication Critical patent/EP3640407B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E04C5/07—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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof

Definitions

  • the invention relates to a method for producing textile reinforcement from a scrim, an impregnation being applied to a thread or a strand of the scrim or to the scrim. Furthermore, the invention relates to such textile reinforcement.
  • Reinforced concrete structures are an integral part of the infrastructure in almost every country in the world.
  • many busy structures are also made of reinforced concrete, e.g. Parking garages, garages, highways, bridges, tunnels etc. A large number of these structures are used for 50 to 100 years (and sometimes even longer).
  • de-icing salts add to the reinforced concrete structures.
  • the de-icing salts are usually chloride-containing. In connection with water, solutions are created that trigger corrosion in the buildings. In many buildings, therefore, substantial, cost-intensive repair work must be carried out on the reinforcement after just 20-25 years.
  • the contaminated covering concrete is usually removed, the reinforcing steel cleaned and provided with new corrosion protection (e.g. on a polymer or cement basis).
  • new corrosion protection e.g. on a polymer or cement basis.
  • the repaired area often only lasts for a few years (due to mechanical, thermal and / or hygric incompatibilities), so that timely further repairs are required, especially when the covering concrete is heavily used. This causes high costs, represents a significant intervention in the structure and, last but not least, leads to restrictions on use during the repair.
  • cathodic corrosion protection One possibility to suppress corrosion and ideally to prevent it is the cathodic corrosion protection (KKS) of buildings.
  • KS cathodic corrosion protection
  • cathodic corrosion protection wins is becoming increasingly important as an economical repair process for components that are at risk or corroded.
  • the invention is therefore based on the object of specifying a method for producing a textile reinforcement and a textile reinforcement which enables mechanical reinforcement for freely weathered and used structures and is easy to install.
  • the textile reinforcement can also include glass, for example. If cathodic corrosion protection is also made possible as part of the mechanical reinforcement, it is advisable to use a carbon fabric or a fabric which is at least partially formed from carbon fibers.
  • scrims are understood to mean a flat structure which consists of several layers of stretched threads which run essentially parallel. The individual layers are placed on top of each other and fixed together at the crossing points. If the threads of different layers are oriented in two different directions, one speaks of a biaxial fabric, if several layers with multiple orientations are provided, one speaks of a multiaxial fabric.
  • scrim is also to be understood to mean a grid which likewise has a corresponding structure.
  • a single stretched strand is understood as the thread of a scrim.
  • This thread can consist of a number of carbon multifilaments, which together form a thread or strand.
  • the impregnation comprises a base material to which an additive is added.
  • the invention is based on the consideration that the provision of sufficient mechanical reinforcement and possibly a sufficiently high conductivity for cathodic corrosion protection can be achieved by suitable selection of an impregnation medium. It has been shown here that the scrim of the textile reinforcement can be particularly easily adapted to the specific requirements at the place of use if the impregnation and there the base medium used for the impregnation is modified by adding additives to increase the electrical, mechanical and thermal properties. It is possible, for example, to increase the electrical properties, in particular the conductivity, by adding carbon nanotubes, metal particles, salts (or ionic compounds) or graphite, while the thermal properties are increased by adding metals, carbon and Graphite particles can be influenced. To improve the mechanical properties, in particular also the bond with the solid mortar, it is possible to add hard materials, for example in the form of silicon carbide, quartz and ceramics.
  • additives it is possible to modify the process parameters and possible processability of the scrim, in particular a carbon scrim. It is conceivable to use plasticizers, retarders or swelling agents to influence the properties of the fresh and solid mortar.
  • the addition of additives can ensure that the strength of the mortar in the area of the scrim is particularly high, while it is comparatively low on the surface. This strength gradient, which drops away from the scrim, enables the scrim to be used particularly flexibly.
  • the base material is preferably made by radical polymerization synthesized a monomer and a starter. It is now possible to add the additive to the monomer and / or the starter before the synthesis. This enables the impregnation to be modified even before the base material is synthesized. Additionally or alternatively, it is also possible to add the additive to the already synthesized base material before, as part of the impregnation and / or after the impregnation in the form of a sprinkling on the impregnated scrim.
  • the starter is applied to the scrim in a first process and only then is the monomer applied, so that the base material is synthesized directly on the scrim.
  • a polymethyl methacrylate as the base material for the impregnation has proven particularly advantageous. Since this base material can be introduced particularly well into the interstices of the scrim but also into the interstices of the fiber strands due to the low density.
  • the epoxy resins, styrene-butadiene rubbers and acrylates or polyurethanes mentioned above are also quite conceivable.
  • the surface of the impregnated scrim is roughened and thus enlarged.
  • additives for example in the form of particles, are added to the coating medium, which bring about such an increase in surface area.
  • granite, quartz powder, cement stone or conductive particles can be used.
  • the enlarged surface leads to a non-positive and positive connection (reinforcing effect).
  • conductive particles By adding conductive particles, the charge transfer can be optimized to improve the cathodic protection against corrosion.
  • ionic compounds, concrete admixtures, mixtures of salts and microsilica (as a suspension or in solid form) or pozzolana reactives can be the hardening reaction kinetics influence, for example when using salts on the one hand to increase the conductivity in the border area and on the other hand to increase the mortar strength in the tissue environment.
  • a coating can also be applied to the already impregnated scrim so that, like the particles, the surface is enlarged or the additives are better integrated.
  • This coating can then either be the carrier medium for the particles or itself provide a higher bond.
  • additives are also added to this coating medium to improve the electrical, thermal or mechanical properties before, during or after application to the impregnated scrim.
  • the impregnation or coating can be applied in particular in the immersion bath process, an emulation process, a spray process or else coated or rolled.
  • the advantages achieved by the invention are, in particular, that, by using an impregnation of the scrim tailored to the respective area of application and modified by an additive, in the case of a carbon scrim especially the carbon fibers, carbon threads or the entire carbon-containing scrim, the properties of the reinforcement the mortar in the immediate vicinity of the reinforcement can also be influenced.
  • curved, freely weathered and used structures can be permanently protected from steel corrosion and mechanically reinforced at the same time.
  • a particular advantage is that, with a suitable modification of the mechanical properties, it can be achieved that the carbon fabric used here as a thin-layer textile concrete can provide sufficient load-bearing capacity or an increased load capacity even without the combination with cathodic corrosion protection.
  • the main advantages of the coating medium used are the improvement of the electrical, chemical and mechanical properties of the entire system, in particular the high mechanical strength and load absorption of the materials used (e.g. static and dynamic tensile, adhesive and Shear loads), long-term resistance to environmental influences, d. H. chemical inertness and temperature resistance in a temperature range from -20 ° C to 80 ° C.
  • the load capacity behavior can be improved in the larger temperature range.
  • the advantages lie in the flexible processability and deformability (drapability) with sufficient rigidity for laying the textile reinforcement. Connections across corners and edges can be made non-positively and electrically conductive. The rigidity also enables easy application during installation.
  • a thread 2 of a scrim is shown in cross section.
  • the thread 2 comprises a large number of individual carbon multifilaments 12, each of which has between several 1,000 and up to 100,000 individual filaments.
  • the thread 2 is in the embodiment Fig. 1 provided with an impregnation 10, to which one or more additives 14 were added in the impregnation process in order to improve the electrical, mechanical or also thermal properties.
  • the thread 2 has been coated with a coating medium 16.
  • sanding occurred, so that the coating 16 serves as a carrier medium for the particles 18. The sanding increases the surface of the thread 2, which results in better bonding properties with the mortar.
  • the clutch 1 after Fig. 2 comprises a plurality of threads 2 or strands, which are arranged in two planes.
  • Each level comprises a number of threads 2 which are spaced apart and essentially parallel to one another.
  • Each of these threads 2 comprises a number of carbon multifilaments, which in the present exemplary embodiment have been glued to form an elongated strand. However, it is also conceivable that these carbon multifilaments are sewn into a strand or connected in some other way.
  • the threads 2 of two planes are essentially orthogonal to one another, which is why a lattice structure with square spaces is formed.
  • the threads 2 are fixed at the crossing points 4 with a continuous sewing thread 6, but can also be glued or connected to one another in another way.
  • the planes of the scrim 1 do not necessarily have to be arranged orthogonally to one another, but, depending on the intended use, can also be arranged offset at a different angle. It is also conceivable that more than two levels can be provided.
  • a ribbon-shaped primary anode 8 is sewn along the entire length on a thread 2, whereby the anode system can be supplied with current over the entire length in contrast to contacting in a single point.
  • the primary anode 8 is sewn into a thread 2 and is therefore essentially completely surrounded by carbon multifilaments.
  • an impregnation 10 and then a coating according to the above statements are applied to the scrim 1.
  • a scrim 1 for an anode system can be provided which has optimal mechanical, electrical and thermal properties for the respective application and place of use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP18200952.2A 2018-10-17 2018-10-17 Non-tissé imprégné d'additifs Active EP3640407B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18200952.2A EP3640407B1 (fr) 2018-10-17 2018-10-17 Non-tissé imprégné d'additifs
US16/655,611 US20200123796A1 (en) 2018-10-17 2019-10-17 Impregnated nest with additives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18200952.2A EP3640407B1 (fr) 2018-10-17 2018-10-17 Non-tissé imprégné d'additifs

Publications (3)

Publication Number Publication Date
EP3640407A1 true EP3640407A1 (fr) 2020-04-22
EP3640407C0 EP3640407C0 (fr) 2023-12-06
EP3640407B1 EP3640407B1 (fr) 2023-12-06

Family

ID=63878525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18200952.2A Active EP3640407B1 (fr) 2018-10-17 2018-10-17 Non-tissé imprégné d'additifs

Country Status (2)

Country Link
US (1) US20200123796A1 (fr)
EP (1) EP3640407B1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5218810A (en) * 1992-02-25 1993-06-15 Hexcel Corporation Fabric reinforced concrete columns
CA2192567C (fr) * 1994-06-10 2006-04-25 Frederick P. Isley, Jr. Mur renforce par du tissu a haute resistance
RU177233U1 (ru) * 2016-08-03 2018-02-14 Общество с ограниченной ответственностью "Знаменский Композитный Завод" Сетка армирующая полимерно-композитная преднапряженная с нанодобавками

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5218810A (en) * 1992-02-25 1993-06-15 Hexcel Corporation Fabric reinforced concrete columns
CA2192567C (fr) * 1994-06-10 2006-04-25 Frederick P. Isley, Jr. Mur renforce par du tissu a haute resistance
RU177233U1 (ru) * 2016-08-03 2018-02-14 Общество с ограниченной ответственностью "Знаменский Композитный Завод" Сетка армирующая полимерно-композитная преднапряженная с нанодобавками

Also Published As

Publication number Publication date
EP3640407C0 (fr) 2023-12-06
EP3640407B1 (fr) 2023-12-06
US20200123796A1 (en) 2020-04-23

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