DE102016100455B4 - Textile reinforcement and its manufacture - Google Patents

Abstract

A device for producing a textile reinforcement for a concrete component, comprising at least one laying device (6), in which at least one positioning device or at least one laying robot (19) is arranged to be relatively movable to at least one yarn dispensing device (18) for the yarn (7), the Laying device (6) for forming at least one tensioning fabric (14) from at least one yarn (7) free of polymeric binders within at least one base frame (9), the base frame (9) yarn holding devices (8) at least in the area of outer edges of the base frame (9) and / or of recesses (4), wherein the twine holding devices (8) are designed as horizontally acting clamping slots (30) or wherein the twine holding devices (8) have deflection bolts (10) and at least some of the deflection bolts (10) individually can be deflected elastically or actively and / or the friction between the yarn (7) and the deflection bolt (10) is reduced, u nd where the yarn holding devices (8) also form deflection points of the yarn (7), characterized in that at least some of the deflection bolts (10) are provided for receiving a hollow cylinder (12) made of mineral material which bonds very well with concrete as a matrix material .

Description

The invention relates to a method and a device for producing a textile reinforcement for a concrete component, having at least one laying device, in which at least one positioning device or at least one laying robot is arranged to be relatively movable to at least one yarn dispensing device for the yarn, the laying device for forming at least one Tensioning fabric is formed from at least one yarn free of polymeric binders within at least one base frame. The base frame has twine holding devices at least in the area of the outer edges of the base frame and / or recesses, the twine holding devices being designed as horizontally acting clamping slots or the twine holding devices having deflection bolts and at least some of the deflection bolts being individually elastically or actively deflectable and / or the friction between twine and deflection pin is reduced. The yarn holding devices also form deflection points for the yarn.

Textile concrete or textile-reinforced concrete is a composite material made from the matrix material concrete and a textile fabric, for example a scrim, a woven fabric or a knitted fabric, which as reinforcement improves the mechanical strength of thin-walled concrete parts in particular.

Since around 2004 in particular, there has been intensive research into the topic of textile-reinforced concrete, in which the traditional steel reinforcement is replaced by a textile. This is also reflected in the state of the art in printed literature. So the pamphlet deals DE 100 19 824 A1 with a manufacturing process for building materials and components using fibrous materials, with natural fibers being used in particular. The pamphlet DE 102 32 142 A1 describes a process for the production of textile-reinforced concrete casings, as they can be used, for example, in the water and wastewater sector for the casing of plastic pipes or plastic containers.

From the pamphlet DE 10 2004 027 739 A1 is the description of a construction element in wood / concrete composite construction for building structures, in particular columns, masts, supports, beams or pipelines. For an exemplary embodiment presented there, glass fiber fabric with a weight per unit area of 180 g / m ² and a fineness of 640 tex was used. It was drawn through a funnel attached above the device and filled with fine concrete. The concrete had a w / c value of 0.33 and consisted of two parts of blast furnace cement, one part of pozzolana and three parts of sand with a maximum grain size of 0.2. After four layers of textile, a reinforcement layer of around 7 mm was achieved. It was smoothed by a scraper resting on discs. The wood was treated with an adhesion promoter before being wrapped.

The pamphlet DE 10 2005 048 190 A1 provides information about the coating in reinforced composite materials, which can be used, for example, in fiber-reinforced high-performance concrete composites.

Through the pamphlets DE 10 2007 015 838 A1 and DE 10 2007 031 935 A1 experts learn of a component with functional fibers and the process for its production.

The pamphlet DE 10 2007 038 931 B4 however, describes thread layer sewing materials and shows in one embodiment the production of an open lattice structure with the geometry of a truncated cone surface. These are thread-layer sewing fabrics with a warp thread course that conforms to the contours, which are preferably used for the production of spatial reinforcement structures for plastic and concrete components. One of these open lattice structures can be used, for example, to create a 3D reinforcement structure in the form of a thread flank and insert it into the concrete of a pipe wall. The endless warp threads are measured and fed in the lengths in this embodiment, as they are required at the respective location to form the desired area. However, none of these solutions are suitable for flat components such as are regularly produced in a concrete plant. At least, however, they do not meet the requirements that are made with regard to long-term strength and temperature resistance of reinforcement.

From the pamphlet US 7,384,585 B2 is a device for producing a textile reinforcement, a reinforcing fabric as a semi-finished fiber product for a fiber composite component, known, having at least one laying device (fiber reinforcement string apparatus; cf. Sp. 10, line 58 to Sp. 11, line 13; 8th ), in which at least one positioning device is arranged to be movable relative to at least one yarn dispensing device for the yarn. The proposed laying device is to form at least one tensioning structure (column 3, line 58 to column 4, line 5; 2A , 3-4 and 10 ) formed from at least one yarn free of polymeric binders (“dry preform”; column 12, line 55 to column 13, line 11) within at least one base frame (reinforcement string jig 5, 7), the base frame yarn holding devices ( pins 6, 6 ') at least in the area of the outer edges of the base frame and / or of recesses, which at the same time form deflection points of the yarn ( 3-4 and 10 ). The proposed yarn holding devices have Deflection bolts that are individually elastically or actively deflectable (column 10, lines 25-38; 6A-6C ).

Another device for producing a textile reinforcement is in the publication DE 10 2006 035 576 B3 (see p. 3, [0020] - [0023] and [0027]; p. 4, [0038], [0041] and [0044] - [0045]; p. 5, [0049] - [0051 ] and [0059]; 1 ). A fiber structure depositing device 12 designed as a depositing robot has fiber structure holders 20b spring-loaded via a spring 34 (p. 5, [0051]; 1 ).

First applications in the form of flat components, such as B. facade panels already exist on the market. So far, the textile fabrics, in particular also non-woven fabrics, have been completely prefabricated by a textile manufacturer in order to then be further processed as reinforcement in the concrete plant into textile-reinforced concrete components. For the production of the textile fabric, rovings made of glass, carbon or basalt are used. After the textile fabric has been produced, it is transported to the precast factories.

The textile fabrics available on the market for this application, mostly 1.20 or 2.50 meters wide and up to 5 meters long as a plate or as a roll with z. B. 80 meter roll length, are available in carbon, AR glass or basalt fiber materials.

If a prefabricated wall element is to be reinforced with these prefabricated textile fabrics or other flat structures in the concrete plant, then these must be cut to size and overlapped for power transmission, referred to as the overlap length. Because of the extensive sections, the need for textile material is very high compared to the area actually used in the component. For example, approx. 18 m ^{2 of} textile fabric (scrim) are required for 12 m ^{2 of} precast wall element. Together with the waste at the textile manufacturer (approx. 10 percent), it is a total of 20 m ² .

So far, without the material being fully established in practice, a textile fabric, for example, from the so-called carbon filament yarn or other high-performance filament yarns suitable for use in textile concrete. B. made in the form of a scrim or fabric and then used as necessary reinforcement in the textile concrete. This z. B. in a precast plant, the production of the concrete component with textile reinforcement. The material must be prefabricated in one process step, where there is a very high level of waste. The waste relates to the yarn (e.g. carbon, AR glass or basalt filament yarn, also known as roving) as well as the high-quality coating that is on the yarn.

The coating is necessary and important for the inner bond of the rovings (bond of the individual filaments) and the outer bond to the concrete matrix, but at the same time it is generally undesirable for use in the present field of technology, at least insofar as it can lead to that Component ultimately has no permanent strength and insufficient temperature resistance. This is because the coating melts at higher temperatures and then becomes a disadvantageous “lubricant” that reduces the strength of the component.

Since it is limited in width, the textile fabric must be overlapped in order to achieve the necessary overlapping length, which also results in an increased use of material. For positioning in the concrete part, spacers must be used, which must also be introduced in a process step beforehand. In addition, elements must be used to prevent the reinforcement from floating when concreting and vibrating.

However, it is disadvantageous that the textile fabrics available on the market are given a predefined shape, material combination and quantity (e.g. fibers per m ² ) and this is therefore uniformly specified for the entire area. The precast concrete elements required in practice, however, are characterized by the fact that they have to be very different in size, shape (recesses such as doors, windows) and reinforcement arrangement (consideration of local load transfer). Furthermore, the fabric prefabricated in this way would have to be impregnated with synthetic resin in order to have sufficient inherent rigidity and thus to be manageable at all.

Due to the prefabrication of textile fabrics, especially in standard dimensions due to the inflexible textile manufacturing process, and their subsequent adaptation to the concrete components, a lot of material is wasted on the one hand. In the above example, 20 m ^{2 are processed} instead of the 12 m ² actually required. In addition, the workload is extremely high, since several process steps are required, starting with the manufacture of the textile fabric, followed by assembly. Furthermore, with the conventional method, built-in parts such as spacers are sometimes necessary to hold the reinforcement in its intended position. Anchoring points for the reinforcement in the concrete, such as loops, are also very difficult to implement. Even if the textile fabric has these, they do not necessarily reach the intended or optimal location in the concrete component.

The pamphlet EP 2 666 922 A1 shows such a concrete construction element with a fiber Reinforcement structure which has fiber strands arranged in a first direction and in a second direction, which form a lattice arrangement with crossing points connecting the fiber strands to one another. The fiber reinforcement structure is embedded in the mineral body, which consists of a filler and a binder. How the grid arrangement is available, however, is nothing to be found in the publication. Paragraph [0014] allows the conclusion that it is provided that the fiber strands are designed as a scrim, which is connected at the crossing points, for example, cohesively or in some other way, such as by binding thread or the like, around the rovings, which are preferably used to form the fiber strands used to fix temporarily. It is also possible to weave the fiber strands into a weave, i.e. to lead them over and under each other at crossing points. There is therefore no way around external production. This is also confirmed by paragraph [0030], according to which the fiber reinforcement structure provided as described above is inserted and positioned in workable concrete for the production of the concrete component. Due to its stiffness, it can be worked into the concrete like a reinforcement mat and remains in it.

This does not solve the problems with the inflexible design of the reinforcement in the concrete component and the excessive consumption of material. It is also provided that the fiber strands have a plastic component, so that, according to Paragraph [009], the glass fibers of the fiber strand are individually or collectively surrounded by a plastic layer which prevents direct contact between each glass fiber and the concrete. According to Paragraph [0019], the plastic component even plasticizes when heated, which is considered to be advantageous for the bond at the intersection points. In fact, however, this circumstance, without the cited publication drawing this conclusion, entails a considerable strength problem as soon as the concrete component is exposed to an elevated temperature, since precisely then the bond between reinforcement and concrete disappears, as does the bond between the reinforcement and the concrete tied fibers and the fibers inside the roving. A strength test at a temperature of 500 ° C is out of the question.

A whole range of solutions is designed in this way or similar. The publications are exemplary WO 2008/07986 A1 and DE 10 2005 055 770 A1 without going into more detail on the content at this point.

Even if the expert in the search for reinforcement for a concrete component has hardly any indications to resort to solutions for the production of fiber-reinforced plastic parts because the techniques are fundamentally incompatible in practice, the state of the art in this area should be mentioned for the sake of completeness. So puts the pamphlet DE 10 2005 034 400 A1 a solution, after which an attempt is made to create a load-appropriate fiber layer and to lay the fiber strand along any path curve (Tailored Fiber Placement - TFP). In order for it to remain there, however, it is fixed to a supporting layer with the help of a tacking thread. A stitching thread is undesirable in the concrete component, a base layer cannot be concreted in at all without serious losses in the mechanical stability of the concrete component. Such a solution is therefore not to be considered.

The pamphlet JP 2000 199 151 A describes a device for laying yarn for lamination, the yarn being placed around needles at the edge and immediately pressed wide after being laid down. To do this, however, it is necessary to lay the yarn loosely and it is therefore not possible to span larger distances between the needles in a self-supporting manner. Such a scrim would not be able to be positioned at the desired point in the profile in a concrete part with a larger area. Apart from that, it is not possible to work in or on a concrete form with such filigree devices as needles, as these would be unusable and dirty within a short time.

The techniques from the production of fiber-reinforced plastics cannot be transferred to the field of textile reinforcement for concrete construction, as already explained in parts. For example, with the mostly thin-walled fiber-reinforced plastics, there are hardly any gaps between the “reinforcement” and the outer edges of the component, which in turn are particularly important in concrete construction, as is the position of the reinforcement in the profile.

In general, with regard to reinforced concrete components, it can be stated that the area of concreting, i.e. the placing and compacting of the concrete, is largely optimized. However, this does not apply to the area of production of the reinforcement. Since the step of manufacturing the textile fabric compared to the raw material (yarn or roving) doubles the price of the resulting semi-finished product compared to the rovings and about 40% of this is not used in the concrete component as waste, optimization is an important step for material- and cost-efficient production.

The object of the invention is therefore to offer a method for producing prefabricated parts from textile concrete as inexpensively as possible and thus competitive with prefabricated reinforced concrete parts. A solution should be found according to which im Precast factory the reinforcement for concreting can be arranged more cost-effectively, above all in the most material-saving way possible through less waste and the omission of a coating of yarns, load-appropriate, with little installation effort and with the integration of built-in parts.

The object is achieved by a device according to claim 1, having at least one laying device, in which at least one positioning device or at least one laying robot is arranged movably, preferably at least two-dimensionally, to at least one yarn dispensing device which dispenses the yarn. The laying device for forming at least one tensioning structure is formed from at least one yarn (roving), preferably free of polymeric binders, within a base frame. At least those binders are undesirable in the yarn that adversely affect the later properties of the reinforcement in the concrete part. Preferably, one or two tension scrims arranged parallel to one another are produced, in the case of thicker concrete parts also more than two parallel layers.

The base frame has twine holding devices at least in the area of the outer edges of the base frame and / or of recesses, provided there are recesses such as openings for windows and doors. The yarn holding devices also form deflection points for the yarn. The tension fabric made of at least one yarn free of polymeric binders, which includes any linear textile structure and in particular rovings, has a temporary inherent rigidity as long as it is held at the edge, in particular as long as it is connected to the base frame. This means that it can be used for further processing, v. a. when concreting, an excellent strength, which is far above that of conventional flat textiles, even if they are equipped with binding agents. This means that spacers which interfere with the structure of the concrete part are no longer required.

The device has twine holding devices at least at a first and a second end position of the device, the twine holding devices being arranged, for example, on a base frame or a base plate. The end positions also represent the deflection points of the yarn and are usually arranged on the outside of the edges of the base frame and around the recesses.

Among the line-shaped textile structures, yarn is particularly important as a term, since according to DIN 60900, yarn is a collective term for all linear textile structures. Accordingly, a yarn is a long, thin structure made of one or more fibers. It is an intermediate textile product which can be processed into woven, knitted, knitted and embroidered fabrics or used for sewing. In the interest of a general understanding, the material used according to the invention is named as yarn below, but includes all suitable linear textile materials.

In the context of the invention, rovings are of outstanding importance as yarns. A roving is a bundle, strand or multifilament yarn made of filaments arranged in parallel, that is, continuous fibers. The cross-section of a roving is usually elliptical or rectangular. Most often filaments made of glass, aramid or carbon (carbon) are grouped together to form rovings. Usually rovings are sorted by type, i. H. produced from one type of fiber. However, there are also hybrid rovings made of filaments of different materials. The roving can practically only be used in conjunction with a matrix such. Concrete are used. It has high strength and rigidity in the longitudinal direction of the fibers. Mechanically speaking, it is a unidirectional layer. The mechanical properties across the fiber are mostly poor. Therefore rovings are laid along the main load paths (main normal stresses). Composites made from unidirectional stretched rovings have a higher strength or rigidity than those made from roving fabrics, since the rovings in fabrics are corrugated, which puts a complex strain on the fibers when loaded. The invention makes use of this difference in that tension scrims are primarily produced from stretched rovings.

The laying along the main load paths leads to an overall load-optimized storage process. This can also be used, for example, to integrate particularly stressed elements into the reinforcement, such as stop elements or flange nuts as suspensions for facade panels.

Since the yarn used according to the invention, for example a roving, is essentially free of, in particular, polymeric binders, there is a particularly good bond to the intended matrix material, concrete. At least any binders that may be present must not hinder the permanent bond with the matrix material, which is stable even under operating conditions. The fibers are not from the matrix material by a binder such as. B. separated plastic, which has fundamentally lower strength, and can also lose strength significantly under the influence of temperature and aging, with the result that the reinforcement is hardly able to transmit force. A further improvement in the fiber-matrix bond can be expected if the roving is wetted all in an immediately preceding process step Experiences filaments with a fine concrete. This is preferably done by spreading the roving and then wetting the filaments and finally bringing the filaments back together again. In addition, only a dry coating, e.g. B. with cement, which is then wetted or activated in the concrete part, ensures an improved bond and sets. The corresponding coating can also take place immediately after the production of the fiber as a substep of the fiber production.

A scrim, whether stretched or not, is a flat structure which consists of one or more layers of parallel, stretched threads or yarns, to be generalized as linear textile structures, according to the invention in particular also rovings.

The threads are usually, but not necessarily, fixed at the crossing points. The fixation generally takes place either by material connection or mechanically by friction and / or form fit. However, the invention dispenses with a fixation, since the yarns form precisely definable crossing points due to their tension, even without any fixation. Alternatively, however, provision is also made for fixing in a known manner.

• • monoaxiale oder unidirektionale, die durch das Fixieren einer Schar von parallelen Fäden entstehen;
• • biaxiale, bei denen zwei Scharen von parallelen Fäden in Richtung von zwei Achsen miteinander fixiert werden; und
• • multiaxial: mehrere Scharen aus parallelen Fäden in Richtung verschiedener Achsen werden fixiert.

The following types of scrims exist, which in principle can also be used according to the invention:

• • monoaxial or unidirectional, which are created by fixing a group of parallel threads;
• • biaxial, in which two sets of parallel threads are fixed to one another in the direction of two axes; and
• • multiaxial: several sets of parallel threads in the direction of different axes are fixed.

The layers in multi-layer scrims can all have different orientations, and also consist of different yarn densities and different yarn counts or materials. In contrast to woven fabrics, non-woven fabrics as reinforcement structures in fiber-matrix composites (matrix material are mainly plastics or mineral materials such as concrete) have better mechanical properties, as the threads are in a stretched form so that there is no additional structural stretch and the orientation of the threads is specially designed for the respective application can be defined anisotropically. Since, according to the invention, primarily untwisted yarns with completely drawn filaments in the form of rovings are used, the last-mentioned effect is particularly pronounced. Because of this elongated shape, a scrim is called non-crimp fabric (NCF) in the English-speaking world and also in international trade.

A tension scrim is a scrim that does not acquire an inherent rigidity suitable for manipulation in subsequent processes through the use of synthetic resin or other aids, but is done by a tenter frame. The tensioning frame brings tensile forces on all sides into the tensioning structure, so that it can be manipulated by the tensioning frame despite the lack of inherent rigidity and does not sag. According to the invention, the base frame, in a special embodiment also the frame frame produced in the edge of the fabric, act as a tensioning frame.

The yarn holding devices are arranged at least on a first and a second side of the device, for example a base plate or a frame. They form deflection points when creating the tensioning gear. The deflection creates an anchoring of the loop thus formed at the deflection point in the concrete after concreting; the same applies to any other matrix material that is used together with the reinforcement according to the invention. The loop anchored in the matrix material or the concrete is therefore able to transfer a high load immediately, while conventional steel reinforcement and even more textile reinforcement require a greater length embedded in the concrete before they are fully load-bearing. This length is between 20 and 200 cm, depending on the yarn, load and temperature.

The reinforcement according to the invention is therefore not acquired as a prefabricated flat textile structure, but made from rovings in the precast plant. By a laying device, comprising, for. B. a machine moving the base frame or the yarn dispenser or a movable laying robot, the rovings are placed directly in the formwork or away from the formwork on the separate base frame to form the tensioning fabric and stretched into the base frame. The textile reinforcement is thus made up directly in the production process for the component. As a result, two process steps that run independently of one another, the production of the fabric and the precast concrete, are combined and optimized in a time-saving and cost-effective manner. This has a high potential for automation, which offers the opportunity to manufacture resource-efficient textile-reinforced concrete components.

The laying device is preferably designed as at least one yarn dispensing device, arranged on a two-dimensionally effective positioning device or a laying robot. In particular, the positioning device, designed as in the plane parallel to Tension laid head with the yarn dispensing device that can be moved to any points represents an inexpensive and simple embodiment of the invention. However, the positioning device must have such dimensions that the largest tension laid to be produced can be accommodated underneath. As an alternative or in addition to the movement of the yarn dispensing device, the movement of the base frame is provided so that a relative movement between the two is achieved.

According to the invention it is provided that the yarn holding devices have deflection bolts. The yarn is laid around this in the course of the formation of the tensioning structure. It has proven to be advantageous if at least some of the deflection bolts can be individually elastically or actively deflected. This serves in particular to compensate for the different tensions of the individual layers that develop in the tensioning structure when laying around the deflection bolts. Because of the high tensile strength and low elastic elongation of high-strength materials such as carbon fibers, undefined tensions occur in the tensioning fabric when taut, which can either lead to overloading of individual layers or to elastic deformation of the base frame, the latter also resulting in a part of the layers sagging or even slipping off the deflection bolts. Elastically deflectable deflection bolts are individually resiliently arranged in a suitable manner on the base frame, preferably in each case on a flexible tongue that is simple and inexpensive to manufacture.

Actively deflectable deflection bolts are used to make it easier to remove the tension gear and / or to create different pretensioning in individual areas of the reinforcement. The active control takes place, for example, by an electromagnet or pneumatically.

One solution according to the invention for avoiding the disadvantageous effects of different tensions in individual layers is to reduce the friction between the yarn and the deflection bolt, so that differences in tension can also be compensated for. For this purpose, at least some of the deflection bolts can be rotated at least on one circumference about an axis of rotation, preferably on roller bearings, or provided with a friction-reducing coating. In this case, for example, the entire deflection bolt can be held at one end in a roller bearing or else firmly clamped and provided with a rotatable sleeve. This then preferably rotates via a smooth rolling bearing.

The invention further provides that at least some of the deflection bolts are provided for receiving a hollow cylinder made of mineral material. This hollow cylinder is, for example, also easily rotatable on the deflection bolt and remains as a functional element, for example as a spacer or as a more rigid hold of a thread loop when concreting in concrete and, thanks to its mineral material, connects very well with the concrete as the matrix material.

Particular advantages reside in an embodiment in which at least one orientation bolt is arranged adjacent to at least one deflection bolt in such a way that the yarn spacing can be adjusted independently of the deflection radius. In this way, a retaining bolt made of concrete, around which the loop of the reinforcement material is placed, which is created during concreting, can be given an optimal size without this resulting in restrictions on the yarn spacing. The same applies to a hollow cylinder made of mineral material as described above. For example, a large retaining bolt or hollow cylinder could ensure a very firm hold of the yarn loop in the matrix material and at the same time, thanks to the orientation bolt, a tight yarn spacing can be created when the retaining bolt or previously the deflection bolt on a base frame at different edge distances, e.g. B. in two rows, are arranged. The arrangement of the deflection bolts on the base frame defines the deflection points, the base frame also allowing the orientation bolts to be arranged.

On the base plate or the base frame with deflection points, for example deflection bolts, the yarn, for example filament bundles or rovings, which will form the subsequent reinforcement, is placed in such a way that, above all, the more heavily loaded concrete surfaces can be provided with a correspondingly strong reinforcement, which is a reinforcement need to be able to derive forces. The targeted filing of the yarn can take place in accordance with the requirements, so that an economical use of material is possible and the cutting to size and the overlapping of predefined textile surface structures associated with loss of material are no longer necessary.

As an additional advantage, built-in parts such as conduits, spacers, anchors or the like could also be arranged on the base plate or base frame. Laying the capillary tube will be discussed later. The base plate or the base frame can be used again afterwards.

It is also provided that the base frame is assembled from frame parts that can be connected to one another on a magnetic table. It is an individual base frame that can be adapted to the concrete component to be manufactured. A sufficiently comprehensive set of frame parts must be kept available for this purpose.

The desired dimensions of the intended concrete component are made by means of frame parts such. B. steel rails, preferably with integrated yarn holding devices as deflection points, z. B. designed as a deflection bolt achieved. The frame parts are arranged on a substrate, preferably a magnetic table, for example by a shuttering robot.

The transfer of data, for example relating to a layout of the yarns or a structure of the base frame or a position of insert parts, takes place in the preferred embodiment of the invention by centrally reading CAD data into the laying device. This means that incorrect data entry in the process chain is not possible, as only the component geometries and other positions desired by the planning engineer are transferred. A digital process chain is created and thus a high level of safety and accuracy in the manufacture of the reinforcement and the concrete parts.

The arrangement of the deflection points is individually adapted to the respective component geometry. Various frame parts are required for this, which are then arranged on the ground. This enables door and window openings as well as other component penetrations to be implemented. After the base frame has been put together, it is fixed in place so that the base frame later has sufficient stability for the further process steps even without a base.

Regardless of the high variability of the aforementioned solution, the invention also provides, especially for large numbers of individual components, for the base frame to be prefabricated and used with predetermined dimensions. Several base frames or multi-part base frames can also be used if the type of concrete part for which the reinforcement is to be manufactured or other technological requirements prompt this.

After concreting, the frame can be removed again by simply lifting it off and reused as a whole, while according to an alternative embodiment the deflection points remain in the component, especially when it comes to ceramic attachments such as the hollow cylinders made of mineral material.

If prefabrication of the base frame on a substrate is not practical or possible, the yarn can also be deposited directly in the formwork. The deflection points are preferably located outside the formwork. For example, a split formwork or an additional frame element with deflection bolts, which is arranged outside the formwork, is necessary.

It is also favorable if the base frame is designed as a plate and alternatively or additionally has a larger number of receptacles for deflection bolts, if provided also for orientation bolts, are actually provided as deflection bolts or orientation bolts, so that the deflection bolts and orientation bolts are variable on the Base frame can be arranged. As a result, a universal base frame can be used for a large number of different tensioning fabrics. For this purpose, only the deflection bolts or orientation bolts have to be introduced into the corresponding receptacles, preferably arranged in a grid. In the simplest case, these are holes into which deflection bolts or orientation bolts are inserted.

A base frame, which is itself designed as a magnetic table, promises even greater flexibility so that the deflection bolts can be arranged variably on the base frame and are held in the intended position by the magnetic force. The magnetic force is then maintained at least until concreting has been completed. Later, the deflection bolts and orientation bolts can simply fall off the magnetic table and, for example, can be cleaned very easily. Then the magnetic table is loaded again.

An alternative yarn holding device is designed as a continuous clamping slot running along the edge of the mold or a plurality of clamping slots arranged transversely to the edge of the mold, into which the thread is inserted by the laying device and held there. In particular, the continuous clamping slot allows variable spacing of the deflection points without any problems. The clamping slots can consist of two rubber lips or be designed as strips pressed against one another by spring force. Alternatively, they have additional protection against the ingress of concrete or can be folded apart for cleaning. This applies in particular when the device for forming the tensioning structure is arranged directly in or on the mold and also remains there during concreting.

A further solution to the object according to the invention is a method according to claim 7 for producing a textile reinforcement for a concrete component, wherein a tensioning fabric is formed from at least one yarn free of polymeric binders by means of a laying device in a base frame by placing the yarn under mechanical tension between the base frame arranged yarn holding devices is laid. The arrangement of the yarn holding devices forms at the same time the edge areas of the tensioning structure and the later reinforcement, whereby it does not necessarily have to be the outer edges of the later concrete component. The edges of recesses in the concrete component such as openings for doors or windows can also represent such an edge area.

A roving made of high-performance filaments suitable for use in textile concrete is particularly preferably used as the yarn. A particularly good force absorption is to be expected here not only because of the stretched filaments, but also a good connection to the concrete matrix material, since there is no rotation of the fibers that would make it difficult for concrete to penetrate and reduce the tensile strength.

In order to improve the bond between the filaments and the concrete even further, according to a special and particularly advantageous embodiment, the roving is initially spread in the sense of an online coating, the individual filaments are preferably wetted with fast-hardening fine concrete and then again to the Roving are merged. Such a prepared roving is immediately processed into a tensioning fabric and forms an inherently stable ceramic reinforcement that can be easily and safely transported for concreting. This inherently stable ceramic reinforcement has a particularly good connection to the concrete introduced into a formwork as a matrix material. In addition, easy penetration of the concrete into the roving is no longer important, so that fine concrete does not have to be used as the matrix material. Furthermore, special attention should be paid to drying, hardening and melting.

The roving is preferably formed from carbon fibers. Carbon fibers are light, have a high tensile strength and withstand corrosive influences well. Because of the completely stretched fibers, the roving itself offers even better tensile strength than a woven fabric, for example.

It has proven to be advantageous if the laying is carried out by means of at least one yarn dispensing device which is arranged on a two-dimensionally effective positioning device. In this way, the level reinforcement can initially be produced by forming a two-dimensional tension structure. In addition, reference is made to the description of the device for producing a textile reinforcement for a concrete component above.

Special advantages for the laying of the rovings and / or the arrangement or positioning of the deflection points, individually adapted to the respective component geometry, result if this is done on the basis of a CAD control.

The same applies if different frame parts are necessary that have to be arranged on the sub-floor and thereby door and window openings as well as other component penetrations can be realized. The desired dimensions of the reinforcement for the intended concrete component are in the case by means of composite frame parts, for. B. steel rails, preferably with integrated deflection points or deflection bolts achieved.

In this preferred embodiment of the invention, data is transferred by centrally reading in CAD data. This means that incorrect data entry in the process chain is not possible, as only the component geometries desired by the planning engineer are transferred. The filament bundles can also be deposited according to CAD data. A digital process chain is created. For this purpose, the CAD data are also read in and processed by a laying robot or another laying device.

After laying, the completely covered and fixed base frame is released from the base plate and placed upside down on the intended component formwork. Now the reinforcement is arranged in the correct position in the future component. Thanks to the open frame structure, concreting of the component can then be carried out without any problems using the application bucket on the formwork table. After concreting, the frame can be removed and reused by simply lifting it off, while the deflection points, preferably designed as hollow cylinders, can remain in the component if this is provided.

It is also advantageous if, in addition to laying the yarn, essentially linear functional elements are laid. These can then also be routed around the deflection bolts in a controlled manner. This applies, for example, to capillary tubes for later heating or cooling or to extract heat from the concrete part, for example a capillary tube with a diameter of 5 mm, or electrical lines for heating. Laying in accordance with the program creates a capillary tube mat with individual expansion and tube density as required.

An alternative possibility of obtaining a textile reinforcement that can be manipulated without auxiliary means arises if the tensioning fabric is treated with a fixing agent in an edge area to such an extent that a rigid tensioning frame made of textile material is formed. In this way, most of the tensioning fabric can free from a binding agent remain, but the tensioning fabric is given sufficient rigidity to be used for concreting or otherwise manipulated without a base frame. The fixing agent can also be a polymeric binder.

An embodiment of the device according to the invention is also advantageous in which the base frame has at least one device for spacing it from a formwork, this device being designed as a support frame, support bolt and / or external support. The device ultimately ensures a defined position of the reinforcement in the concrete part.

The invention also makes the production of the textile fabric at the textile manufacturer completely obsolete, since the rovings, which were previously processed into textile fabrics at the textile manufacturer, are now assembled directly in the concrete plant and processed into a textile fabric in the precast manufacturing process in accordance with the requirements in terms of size and structure.

Since the rovings are placed on a base plate or a grid in such a way that only the surfaces that will be concreted later receive reinforcement, waste-free work is ensured. There is therefore almost no waste and no more overlaps. A precast concrete part with an area of 12 m ² only requires reinforcement material for approx. 12 instead of approx. 20 m ² as before, which means a material saving of 40%. Furthermore, the rovings can be varied in direction and number so that, for. B. a larger number of rovings is placed in highly stressed areas than in less stressed areas, which is associated with further material savings. This means that production can be carried out 100% in line with requirements and particularly efficiently. The reinforcement material can also be combined. For example, carbon is used in highly stressed areas and AR glass rovings in less stressed areas, depending on the need for mechanical properties.

Another advantage are the deflection points at the edges, which are extremely advantageous for the load-bearing capacity of the reinforcement and can be influenced in a targeted manner, which, however, are usually removed during textile production. But even if they remain on the textile, they are usually not in the final component where they are, e.g. can be used to anchor the reinforcement. According to the present invention, these deflection points are v. a. at the edges of the components and the recesses contained therein, where they can be used to anchor the rovings.

Due to the elimination of the upstream textile manufacturing process and the direct storage of the reinforcement material in the form of yarn or roving in the precast concrete plant, the coating of the rovings takes place - if at all still necessary - during the laying and only with means that do not reduce the bond to the concrete matrix . This represents a further advantage, since the properties of the coating can be optimally selected depending on the component requirements. Even if a coating is dispensed with for concrete components that have to withstand higher temperatures, the invention nevertheless encompasses yarns with a coating that can be used when there are no thermal requirements and the problem of aging of coatings does not cause any disadvantages.

• • der Materialbedarf (u. a. für Rovingmaterial, Beschichtung, Abstandshalter für textile Gelege) wird deutlich gesenkt;
• • die Transportaufwendungen werden reduziert;
• • die optimale Garnanordnung (z. B. Material, Richtung, Menge) wird ermöglicht;
• • eine gleichbleibende hohe Qualität wird gesichert;
• • die Möglichkeiten einer bzw. unterschiedlicher Vorspannung ist gegeben;
• • der Arbeitsaufwand bei der Herstellung der Bewehrung (Zuschneiden, Überlappen, Entsorgen der Reste entfällt) wird drastisch reduziert;
• • ein hoher Automatisierungsgrad (Wegfall der Prozessschritte Konfektionieren der Bewehrung, Einbringung von Abstandshaltern und von Elementen zur Verhinderung des Aufschwimmens der Bewehrung) wird ermöglicht;
• • die Flexibilität der simulationsgestützten Bauteilfertigung ist stark erhöht;
• • die Kosten für die Herstellung sind reduziert und
• • insgesamt wird die Konkurrenzfähigkeit von Textilbetonfertigteilen erhöht.

An additional advantage is that the insertion of built-in parts such as empty pipes, empty sockets for electrical installation and anchor bolts is also possible with the new method. The following advantages are achieved with the invention:

• • The material requirement (including for roving material, coating, spacers for textile fabrics) is significantly reduced;
• • Transport expenses are reduced;
• • the optimal yarn arrangement (e.g. material, direction, quantity) is made possible;
• • a consistently high quality is ensured;
• • the possibility of one or different preload is given;
• • The amount of work involved in producing the reinforcement (cutting, overlapping, and disposing of leftovers is not necessary) is drastically reduced;
• • A high degree of automation (elimination of the process steps of assembling the reinforcement, introduction of spacers and elements to prevent the reinforcement from floating up) is made possible;
• • The flexibility of simulation-based component production is greatly increased;
• • The cost of manufacturing is reduced and
• • Overall, the competitiveness of textile concrete precast elements is increased.

The innovation and novelty of the invention is the direct merging of two industrial areas, between which there are no other manufacturing connections, and thus the surprising saving of a previously unavoidable value-added process step that was mandatory from the perspective of the concrete plant, namely that of semi-finished product production in one Textile company. There are not as before from yarns on textile machines semi-finished products in the form of z. B. manufactured biaxial scrims for the reinforcement of the concrete. The conventional part of semi-finished product production or reinforcement production is now integrated into the process chain of the prefabricated part manufacturer and is therefore no longer a single production step.

This also eliminates the need for transport from the yarn to the textile semi-finished product manufacturer, the cost-intensive production of semi-finished products and the transport from the textile semi-finished product manufacturer to the concrete component manufacturer. Furthermore, the overlap of the reinforcements to achieve the necessary overlap lengths and the waste of up to 40% are saved. The yarns are also placed directly in the reinforcement in a load-oriented manner, which was previously not possible.

• 1: Stand der Technik bei der Verlegung von Bewehrungen in Textilbeton;
• 2: schematisch eine Ausführungsform eines erfindungsgemäßen Grundrahmens mit Spanngelege, eine Bewehrung mit Aussparungen bildend;
• 3: schematisch eine Ausführungsform einer erfindungsgemäßen Verlegeinrichtung mit Grundrahmen, Spanngelege und Verlegeeinrichtung;
• 4: schematisch eine Ausführungsform eines erfindungsgemäßen Grundrahmens mit Umlenkbolzen an Federzungen im Detail;
• 5: schematisch eine Ausführungsform eines erfindungsgemäßen Umlenkbolzens mit Hohlzylinder;
• 6a bis 9b: schematisch eine Ausgestaltung eines Verfahrensablaufs zur Fertigung von textilbewehrten Betonbauteilen;
• 10: schematisch eine Ausführungsform einer erfindungsgemäßen Vorrichtung zur Herstellung eines Betonrovings;
• 11: schematisch eine Ausführungsform einer erfindungsgemäßen Klemmeinrichtung für das Garn;
• 12: schematisch eine Ausführungsform eines erfindungsgemäßen Auflagerahmens;
• 13: schematisch eine Ausführungsform eines erfindungsgemäßen Grundrahmens mit Auflagebolzen; und
• 14: schematisch eine Ausführungsform eines erfindungsgemäßen Grundrahmens mit Außenauflage.

Further details, features and advantages of the invention emerge from the following description of exemplary embodiments with reference to the associated drawings. Show it:

• 1 : State of the art in the laying of reinforcement in textile concrete;
• 2 : schematically an embodiment of a base frame according to the invention with tensioning gear, forming a reinforcement with recesses;
• 3 : schematically an embodiment of a laying device according to the invention with a base frame, tensioning mesh and laying device;
• 4th : schematically, an embodiment of a base frame according to the invention with deflection bolts on spring tongues in detail;
• 5 : schematically an embodiment of a deflection bolt according to the invention with a hollow cylinder;
• 6a to 9b : schematically an embodiment of a process sequence for the production of textile-reinforced concrete components;
• 10 : schematically an embodiment of a device according to the invention for producing a concrete roving;
• 11 : schematically an embodiment of a clamping device according to the invention for the yarn;
• 12 : schematically an embodiment of a support frame according to the invention;
• 13 : schematically an embodiment of a base frame according to the invention with support bolts; and
• 14th : schematically, an embodiment of a base frame according to the invention with external support.

1 shows the state of the art in the laying of reinforcement 2 in a concrete component 1 made of textile concrete, with a total of three parts of a textile reinforcement in the example shown 2 must be laid with overlaps to develop sufficient tensile strength 3 need. Besides that for the overlaps 3 required additional material require the recesses 4th that in these areas also the material of the reinforcement 2 is cut out. The material cut out there can no longer be used and must be disposed of as waste. This results in additional costs as well as the effort to adapt the present textile material accordingly.

2 shows schematically an embodiment of a base frame according to the invention 9 with tension gear 14th with cutouts 4th , forming a later reinforcement for a concrete part. The recesses 4th are not even provided with reinforcement that is not required, as was still the case with the prior art. Instead there are deflection bolts 10 , as well as on the edge of the base frame 9 to make the cutouts 4th arranged around. This allows the yarn 7th from one side of the base frame 9 to the other side or to the edge of one of the recesses 4th are tensioned, each between two deflection bolts 10 . Laying and tensioning the tension gear 14th takes place in the present example evenly and at right angles crosswise, in the manner of a fabric, but without the stretched yarns 7th to lay around each other. An uneven arrangement of the yarns would also be 7th possible to reinforce certain, more highly stressed areas, shown here darker, but yarn in less stressed areas 7th to save.

The invention encompasses a base frame 9 that is multi-part; likewise a base frame, which cannot be changed in terms of its dimensions or which can be variably assembled from individual elements.

3 shows schematically an embodiment of a device according to the invention 5 for the production of textile reinforcement for a concrete component with a base frame 9 , Tension gear 14th and laying device 6th . The base frame can be seen 9 , which is already partially with a tension gear 14th made of yarn 7th is strung, which as in 2 between the edge areas of the base frame 9 or the recesses 4th is stretched. In the aforementioned areas are Twine holding devices 8th , preferably designed as deflection bolts or clamping slots.

The yarn 7th is thereby via a yarn dispenser 18th fed, which is designed so that the yarn 7th under tension to the tension gear 14th can be processed. For this purpose, the yarn dispenser 18th from the laying device 6th , having in the present exemplary embodiment a laying robot 19th , in the intended way via the base frame 9 and from a first yarn holding device 8th to a second, opposite yarn holding device 8th guided. The control of the laying robot 19th takes place in the preferred embodiment on a computer basis, for example on the basis of prepared CAD data.

Since the tension gear shown in the example 14th a two-dimensional structure can be used instead of a laying robot 19th Simpler devices are also used. A yarn dispensing device that is movable in two directions in the plane is an example 18th or a correspondingly movable base frame 9 called. Alternatively, each of the two basic elements can also serve one direction of movement, so that a two-dimensional relative movement results. Furthermore, several base frames 9 and / or several laying devices 6th , for example laying robots 19th , are used, e.g. B. to the reinforcement according to the invention faster or with different yarns 7th to make.

In addition to the filing of the yarn shown here 7th in two directions oriented at right angles to each other, it is provided according to the invention to lay the yarn at any angle to each other, such as. B. at an angle of 45 °.

In areas with higher loads, such as lintels and lintels, concentrated reinforcement is also possible in order to be able to better absorb the loads occurring there and to reinforce the rest of the component in a material-saving manner. This is also done on 15th referenced with the associated description.

Furthermore, it is provided that more than one layer of the tension gear 14th on the base frame 9 is stretched. Concrete components can thus be manufactured which have several, preferably two, layers of reinforcement at a distance from one another. This can be done, for example, by one laying device each 6th on both flat sides of the base frame 9 respectively.

4th shows schematically an embodiment of a base frame according to the invention 9 with deflection bolt 10 on spring tongues 11 in detail in perspective illustration. Will be on the deflection pin 10 a force exerted, in particular by a tensioned roving or another yarn, is the output of the bolt 10 with the spring tongue 11 after. This creates the base frame 9 protected from being elastically deformed and thus allowing the entire tensioning fabric on it to slacken in an undesirable manner. According to the invention, other variants of the resilient suspension of the deflection bolt are also possible 10 , for example by a spring-loaded bolt base or longitudinally displaceable tongues on which each individual deflection bolt 10 is appropriate.

Furthermore, it is provided according to the invention to be able to move the deflection bolts actively, not least in order to be able to easily remove the finished tensioning gear or to be able to pretension individual areas thereof with a defined force.

Another embodiment of the invention shows 4th with the hollow cylinder 12 that is on a deflection pin 10 is attached. This hollow cylinder 12 No matter what material it is made of, it can serve the purpose of allowing the yarn to slide easily over this hollow cylinder that serves as a roll 12 to enable. The hollow cylinder 12 for example roller bearings opposite the deflection bolt 10 his.

In particular, however, it is provided that the hollow cylinder 12 made of a mineral material, for example concrete. Then the hollow cylinder 12 remain there after being set in concrete in the concrete component and thus at the same time offer an immediately resilient support for the loops of the yarn formed around the hollow cylinder 12 around, optionally also a support for the entire reinforcement. In addition, the hollow cylinders can be made from a higher-strength material, while the rest of the matrix material can be made from a less-strong material. This makes the reinforcement highly resilient, even if the remaining, inexpensive matrix material could not transfer such pull-out forces to conventional reinforcement.

5 shows schematically an embodiment of a deflection bolt according to the invention 10 with hollow cylinder 12 in plan view, arranged on the base frame 9 . It can be seen that the hollow cylinder 12 due to its relatively large deflection radius 25th a large distance between the parts of the yarn running past one another 7th would evoke. This results in a conflict of objectives because, on the one hand, the large deflection radius 25th ensures that high forces are introduced into the matrix material, for example the concrete. On the other hand, these forces would be due to the relatively small number of yarn lines due to a large yarn spacing 24 limited. This conflict is resolved according to the invention by means of orientation bolts 13 are used, which the yarn spacing 24 Reduce it to such an extent that a larger number of parallel yarn lines leads to a high strength of the reinforcement in this area. By staggered arrangement of the deflection bolts 10 high yarn densities can be achieved.

6a to 9b show an exemplary process sequence for the production of textile-reinforced concrete components. First the yarn 7th around the deflection bolts on the base frame, which cannot be seen here 9 deposited by laying robot or alternatively with a movable portal frame. 6a shows the partially stretched base frame 9 in perspective view, 6b however, a schematic sectional view from the side, in which the arrangement of the base frame 9 can be seen on a surface, here designed as a magnetic table.

After the 7a and 7b the base frame is now completely provided with the tensioning fabric 9 together with the underground 15th turned, with the base frame 9 by the magnetic force of the magnetic table 26th on the underground 15th adheres.

The representation in the 8a and 8b shows how the base frame 9 after turning on the formwork 16 is placed. The base frame 9 with the formwork 16 connected and fixed on the back so that the base frame 9 , here as a support frame resting on the edge of the formwork 31 (see. 12 ) and formwork 16 cannot move against each other during concreting and the tensioning fabric 14th receives its intended position in the later concrete part.

Finally the concreting is carried out, as this is the case 9a and 9b demonstrate. This is done with the concrete 17th brought up and into the formwork 16 filled. Fine concrete is preferably used for this, which is compacted by shaking after pouring. Then, after a reasonable setting time, the clamping frame must be removed and the component dried, unless the deflection bolts have already been made 10 would have to be removed from the concrete.

10 shows schematically an embodiment of a device according to the invention for producing a concrete roving 20th . The yarn present as roving is used for this 7th by a filament spreader 22nd guided. The individual elements of the roving are separated from one another to such an extent that a matrix material can wet each filament individually or filament bundles made up of a suitable number of filaments. Fine concrete is used in the present exemplary embodiment 21st as a matrix material through which the filaments are guided. This process step is followed by compaction of the roving in a compaction device 23 , in which the roving is brought together again and the device as a concrete roving 20th leaves. Such a concrete roving is preferably made with fast-hardening fine concrete, so that in a short time a solid, rod-shaped concrete roving 20th arises. Will be such a concrete roving 20th When processed in a tensioning structure, an inherently stable grid is created which, as reinforcement with high strength, also ensures a very secure connection to the matrix material of the later concrete component.

11 shows schematically an embodiment of a clamping device according to the invention 30th for the yarn 7th . It consists of two jaws that form a narrow gap and between which the yarn 7th pinched and thereby held.

12 shows schematically an embodiment of a support frame according to the invention 31 , an advantageous embodiment of the base frame including the substrate, such as in 7b shown. The support frame is located here 31 with the tension fabric (s) located therein 14th also on the formwork 16 on. This creates support frames 31 and tension gear 14th opposite the formwork 16 secured in their position and the reinforcement receives the intended position in the concrete part during concreting.

13 shows schematically an embodiment of a base frame according to the invention 9 with underground 15th , such as in 7b shown, with support bolts 32 take over the task of the position of the base frame in relation to the formwork 16 secure. In this way, too, the base frame and tensioning fabric are alternatively or additionally (in the latter case, avoiding overdetermination) 14th , such as in 12 shown, opposite the formwork 16 secured in their position and the reinforcement receives the intended position in the concrete part during concreting.

14th shows schematically an embodiment of a base frame according to the invention 9 with outside support 33 . Neither the base frame is on the formwork 16 on, there are still support bolts 32 intended. On the one hand, this prevents contamination on the formwork from causing the base frame to be fixed in an incorrect position. On the other hand, unwanted breakthroughs in the concrete part, such as the support bolts, are avoided 32 left behind when they are against the formwork 16 prop up.

Regardless of this, it is also intended that the outside edition 33 is used together with at least one of the conditions described above.

15th shows schematically an embodiment of a base frame according to the invention 9 with deflection bolt 10 and a flange nut 34 , which in the example shown in a concrete part 1 built-in serves as their suspension. The suspension is characterized by a high level of force and therefore requires a corresponding introduction of force into the concrete part 1 . To break out or damage the concrete part 1 in the area of the flange nut 34 The reinforcement is to be avoided, here initially as a stress-reliever 14th to see, stored power flow optimized. The yarn 7th therefore extends between the deflection bolts 10 and the flange nut, 34 whereby the force acting there in the concrete part 1 is initiated.

List of reference symbols

1

Concrete component

2

Reinforcement

3

overlap

4th

Recess

5

Device for generating textile reinforcement for a concrete component

6

Laying device

7th

yarn

8th

Twine holding device

9

Base frame

10

Deflection bolt

11

Spring tongue

12

Hollow cylinder

13th

Orientation bolt

14th

Tension gear

15th

Underground

16

formwork

17th

concrete

18th

Yarn dispenser

19th

Laying robot

20th

Concrete roving

21st

Fine concrete

22nd

Filament spreader

23

Compaction device

24

Yarn spacing

25th

Deflection radius

30th

Clamping device

31

Support frame

32

Support bolt

33

External edition

34

Flange nut

Claims (7)

A device for producing a textile reinforcement for a concrete component, comprising at least one laying device (6), in which at least one positioning device or at least one laying robot (19) is arranged to be relatively movable to at least one yarn dispensing device (18) for the yarn (7), the Laying device (6) for forming at least one tensioning fabric (14) from at least one yarn (7) free of polymeric binders within at least one base frame (9), the base frame (9) yarn holding devices (8) at least in the area of outer edges of the base frame (9) and / or of recesses (4), wherein the twine holding devices (8) are designed as horizontally acting clamping slots (30) or wherein the twine holding devices (8) have deflection bolts (10) and at least some of the deflection bolts (10) individually is elastically or actively deflected and / or the friction between the yarn (7) and the deflection bolt (10) is reduced, u nd where the yarn holding devices (8) also form deflection points of the yarn (7), characterized in that at least some of the deflection bolts (10) are provided for receiving a hollow cylinder (12) made of mineral material which bonds very well with concrete as a matrix material . Device according to Claim 1 wherein at least one orientation bolt (13) is arranged adjacent to at least one deflection bolt (10) in such a way that the yarn spacing (24) can be set independently of the deflection radius (25). Device according to one of the preceding claims, wherein the deflection bolts (10) can be arranged on the base frame (9). Device according to Claim 3 , wherein the base frame (9) on a base (15), designed as a magnetic table (26), is composed of interconnectable frame parts. Device according to Claim 3 , the base frame (9) itself being designed as a magnetic table (26) so that the deflection bolts (10) can be arranged variably on the base frame (9) and can be fixed magnetically. Device according to one of the preceding claims, wherein the base frame (9) has at least one device for spacing it from a formwork (16), the device as Support frame (31), support bolt (32) and / or outer support (33) is executed. Method for producing a textile reinforcement for a concrete component, characterized in that at least one tensioning fabric (14) is formed from at least one yarn (7) essentially free of polymeric binders by means of at least one laying device (6) in at least one base frame (9), by laying the twine (7) under mechanical tension between twine holding devices (8) arranged on the base frame (9), the twine holding devices (8) being designed as clamping slots (30) or the twine holding devices (8) having deflection bolts (10) and at least some of the deflection bolts (10) can be individually elastically or actively deflected and / or at least some of the deflection bolts (10) are rotatably mounted on at least one circumference about an axis of rotation, and the twine holding devices (8) at the same time deflection points of the twine (7) form.

Images