US20200123796A1 - Impregnated nest with additives - Google Patents

Impregnated nest with additives Download PDF

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Publication number
US20200123796A1
US20200123796A1 US16/655,611 US201916655611A US2020123796A1 US 20200123796 A1 US20200123796 A1 US 20200123796A1 US 201916655611 A US201916655611 A US 201916655611A US 2020123796 A1 US2020123796 A1 US 2020123796A1
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United States
Prior art keywords
nest
textile reinforcement
impregnation
reinforcement
thread
Prior art date
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Abandoned
Application number
US16/655,611
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English (en)
Inventor
Detlef Koch
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Individual
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Individual
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Publication of US20200123796A1 publication Critical patent/US20200123796A1/en
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    • 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
    • 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
    • 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 a method for producing a textile reinforcement from a nest, wherein an impregnation onto a thread or a string of the nest or onto the nest. Furthermore, the invention relates to such a textile reinforcement.
  • FIG. 1 is a cross-sectional view of a thread of the nest
  • FIG. 2 shows a nest with a primary anode sewn in.
  • the contaminated covering concrete is removed, the reinforcing steel is cleaned and provided with a new corrosion prevention (e.g. based on polymer or cement).
  • a new corrosion prevention e.g. based on polymer or cement.
  • CCP cathodic corrosion prevention
  • the present textile carbon reinforcements only fulfill the function of building reinforcement or of corrosion prevention. Attempts are, however, already made to impregnate the carbon fibers in epoxy resin or styrene-butadiene rubber, in order to obtain a stable nest. Nests with epoxy-resin impregnation possess a high bond strength, whereas nests with styrene-butadiene rubber are characterized in particular by their good processability, ductility and, in particular, sufficient polarization properties. However, at present, no impregnation is available which would possess a marked mechanical bond and at the same time a good processability/ductility as well as advantageous polarization properties.
  • the invention is, therefore, based on the problem to provide a method for producing a textile reinforcement, and a textile reinforcement, which allows a mechanical reinforcement for freely weathered and trafficked buildings and is easy to lay.
  • the textile reinforcement can, for example, also comprise glass. If within the framework of the mechanical reinforcement, a cathodic corrosion prevention shall be possible, the use of a carbon nest or of a nest formed at least partially by carbon fibers offers itself for this purpose.
  • nest By nest, one understands within the framework of the present application a surface body consisting of several layers of substantially parallel stretched threads. The individual layers are placed one on top of the other and fixed to each other in the crossing points. If the threads of different layers are oriented in two different directions, a biaxial nest is given, if several layers with several orientations are provided, a multiaxial nest is given. Within the framework of the present application, one also understands, therefore, by the term “nest” a grid which also has a corresponding structure.
  • This thread may consist of a number of carbon multifilaments forming together a thread or string.
  • the invention starts out on the consideration that the provision of a sufficient mechanical reinforcement and possibly a sufficiently high conductivity for the cathodic corrosion prevention can be achieved by a suitable choice of an impregnation medium. It has turned out that the nest of the textile reinforcement can be adapted to the environmental conditions prevailing on the site of application in a particularly easy manner if the impregnation and, there, the basic medium used for the impregnation, is modified by admixing additives to increase the electrical, mechanical and thermal properties.
  • the solidity of the mortar is particularly high in the area of the nest, while it is relatively low on the surface. This solidity gradient, decreasing in the direction facing away from the nest, allows a particularly flexible use of the nest.
  • the basic material is, in a preferred embodiment, synthesized by radical polymerization from a monomer and a starter.
  • the additive it is possible to admix the additive to the monomer and/or the starter already prior to the synthesization. This enables a modification of the impregnation already prior to the synthesization of the basic material.
  • the starter is applied in a first process on the nest and the monomer is only applied afterwards, so that the synthesization of the basic material is effected directly on the nest.
  • polymethylmethacrylate As a basic material for the impregnation because due to its low density, this basic material can be introduced particularly well into the interspaces of the nest, but also into the interspaces of the fiber strings.
  • polymethylmethacrylates As basic material, it is, however, also imaginable in general to use the above-mentioned epoxy resins, styrene-butadiene rubbers and acrylates or polyurethanes.
  • the surface of the impregnated carbon nest is, in a preferred embodiment, roughened and thus enlarged.
  • additives are admixed to the coating medium in the form of particles which cause such an enlargement of the surface.
  • granite, quartz powder, hydrated cement or conductive particles can be used.
  • the enlarged surface results in a force and form-locking bond (reinforcing effect).
  • ionic compounds, concrete admixtures, mixtures of salts and microsilica (as suspension or also in solid form) or pozzolanic reactives can be used. They can influence the kinetics of the hardening reaction, in order to increase, in case of using salts, the conductivity in the border area, on the one hand, and the solidity of the mortar in the environment of the nest, on the other hand.
  • the impregnation or else the coating can be applied in particular by the immersion-bath method, an emulation process, a spray process or may also be painted or rolled on.
  • the advantages achieved with the invention consist in particular in that through use of an impregnation of the nest, in case of a carbon nest, in particular of the carbon fibers, carbon threads or the entire nest containing carbon, which is adapted to the application range in question and modified by an additive, it is possible to influence the properties of the reinforcement, but also of the mortar, in the immediate environment of the reinforcement. In this way, it is possible to protect, in addition to plane surfaces, also curved, freely weathered and trafficked buildings permanently against steel corrosion and, at the same time, to mechanically reinforce them.
  • the carbon nest used in this case being a thin-layer textile concrete, can provide a sufficient load-bearing capacity or a load increase even without the combination with a cathodic corrosion prevention.
  • this may, therefore, reduce the load, increase the load-bearing capacity and enlarge the overhead clearances in parking blocks.
  • the increase of solidity in the vicinity of the fibers leads to an improved performance without causing an excessive formation of cracks due to shrinkage. Furthermore, the admixture of plasticisers on the fiber can improve the penetration into the fabric.
  • the essential advantages of the coating medium used lie in improving the electrical, chemical and mechanical properties of the entire system, in particular the high mechanical load-bearing or load-carrying capacity of the materials used (e.g. in case of static and dynamic tensile, adhesive-pull and shearing stresses), the long-term resistance against environmental influences, i.e. chemical inertia as well as thermal stability in a temperature range of ⁇ 20° C. to 80° C.
  • the load-carrying behavior in a larger temperature range can also be improved.
  • the advantages lie in the flexible processability and ductility (drapability) and, at the same time, sufficient rigidity for laying the textile reinforcement. Connections over corners and edges can be produced in a force-locking and electrically conductive manner.
  • the rigidity enables an easy application in the laying process. Further advantages are the high bond strength between the concrete and the textile reinforcement (possibly due to the additional use of a coating) and the optimized conductivity in the “metallic” conductor (carbon, conductor of 1st order) and the good charge transition to the ionic conductor (concrete; conductor of 2nd order).
  • FIG. 1 is a cross-sectional view of a thread 2 of a nest.
  • the thread 2 comprises a multitude of individual carbon multifilaments 12 , each of which includes between several 1,000 and up to 100,000 individual filaments.
  • the thread 2 is provided, in the exemplary embodiment according to FIG. 1 , with an impregnation 10 to which one or several additives 14 have been admixed in the impregnation process to improve the electrical, mechanical or also thermal properties.
  • the thread 2 has been coated with a coating medium 16 .
  • a sanding took place, 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 nest 1 according to FIG. 2 comprises a multitude of threads 2 or strings, arranged in two planes.
  • Each plane comprises a number of threads 2 , which are spaced from each other and substantially parallel to each other.
  • Each of these threads 2 comprises a number of carbon multifilaments, which in the present exemplary embodiment have been glued together to form a long stretched string. It is, however, also imaginable to sew these carbon multifilaments together to a string or connect them with each other in another manner.
  • the threads 2 of two planes lie substantially orthogonal to each other, so that a grid structure with rectangular interspaces is formed.
  • the threads 2 are fixed in the crossing points 4 with a continuous sewing thread 6 , but they can also be glued together or connected with each other in another manner.
  • the planes of the nest 1 need not necessarily be arranged orthogonal to each other, but can also be arranged, depending on the intended application, at another angle. It is also imaginable to provide more than two planes.
  • a band-shaped primary anode 8 is sewn onto a thread 2 along the entire length, so that the anode system, contrary to a contacting in one single point, can be supplied with current over the entire length.
  • the primary anode 8 is sewn into a thread 2 and is thus substantially completely surrounded by carbon multifilaments.
  • an impregnation 10 and afterwards, a coating according to the above explanations is applied on the nest 1 .
  • the recipe of the impregnation and the coating and by admixing corresponding additives it is possible in this case to provide a nest 1 for an anode system, which possesses optimum mechanical, electrical and thermal properties for the application and operating site in question.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Textile Engineering (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
US16/655,611 2018-10-17 2019-10-17 Impregnated nest with additives Abandoned US20200123796A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18200952.2A EP3640407B1 (de) 2018-10-17 2018-10-17 Getränktes gelege mit additiven
EP18200952.2 2018-10-17

Publications (1)

Publication Number Publication Date
US20200123796A1 true US20200123796A1 (en) 2020-04-23

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ID=63878525

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/655,611 Abandoned US20200123796A1 (en) 2018-10-17 2019-10-17 Impregnated nest with additives

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US (1) US20200123796A1 (de)
EP (1) EP3640407B1 (de)

Family Cites Families (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 (en) * 1994-06-10 2006-04-25 Frederick P. Isley, Jr. High strength fabric reinforced walls
RU177233U1 (ru) * 2016-08-03 2018-02-14 Общество с ограниченной ответственностью "Знаменский Композитный Завод" Сетка армирующая полимерно-композитная преднапряженная с нанодобавками

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EP3640407B1 (de) 2023-12-06
EP3640407C0 (de) 2023-12-06
EP3640407A1 (de) 2020-04-22

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