EP4605192A1 - Verfahren und vorrichtung zur herstellung einer betonplatte aus vorgespanntem beton - Google Patents
Verfahren und vorrichtung zur herstellung einer betonplatte aus vorgespanntem betonInfo
- Publication number
- EP4605192A1 EP4605192A1 EP23790410.7A EP23790410A EP4605192A1 EP 4605192 A1 EP4605192 A1 EP 4605192A1 EP 23790410 A EP23790410 A EP 23790410A EP 4605192 A1 EP4605192 A1 EP 4605192A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- formwork
- fill level
- filling container
- container
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/026—Feeding the moulding material in measured quantities from a container or silo by using a movable hopper transferring the moulding material to the moulding cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0295—Treating the surface of the fed layer, e.g. removing material or equalization of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/0063—Control arrangements
- B28B17/0081—Process control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
Definitions
- tendons such as prestressing wires or strands are firmly bonded to the concrete so that there is practically no relative displacement between the two materials. In this way, a direct bond can be created between the tendons and the concrete, as is often the case during the production of precast concrete elements in precast plants, where tensioned prestressing wires or strands are embedded in the precast element. After the concrete has been poured and hardened, the prestressing is released. The tensioning force in the precast element is applied through the bond between the concrete and the tendons and by wedging the relaxed tendons.
- a precast concrete component has become known in which the reinforcement or tendons of a large number of rovings, i.e. bundles, strands or multifilament yarns made up of parallel filaments or continuous fibres.
- the rovings can comprise or consist of carbon or glass fibres.
- the rovings must be stretched one on top of the other in several layers in the longitudinal and transverse directions. This process must be completed before the concrete components are manufactured and the stretched rovings must penetrate the formwork for the concrete component.
- the area enclosed by the formwork is filled with concrete, ensuring that the height of the fresh concrete is as equal as possible over the entire length and width of the concrete slab to be constructed.
- the precise maintenance of a predefined height over the entire extent of the concrete slab is of particular importance in the case of concrete components reinforced with prestressed rovings, because it must be ensured that the rovings have a defined position within the concrete slab in relation to a zero stress line. Otherwise, warping of the slab would occur, particularly in the case of concrete slabs with a low slab thickness and high prestressing forces.
- the invention therefore aims to improve the production of concrete slabs from prestressed concrete using rovings with regard to the introduction of the fresh concrete into the formwork.
- an automated pouring process is to be implemented with which a predetermined fresh concrete thickness can be achieved within narrow tolerances.
- the fresh concrete is to be introduced in such a way that the fragile rovings are not damaged.
- the invention according to a first aspect in a method of the type mentioned at the outset essentially consists in that the pouring of the concrete into the formwork comprises the discharge of the concrete via an adjustable outlet opening(s) of a movable filling container extending over substantially the entire width of the formwork or via several adjustable outlet openings arranged distributed over the width, while the filling container is moved over the length of the formwork, wherein the fill level of the filling container is monitored during discharge and concrete is refilled from a storage container and wherein the amount of refilled concrete is regulated such that the fill level in the filling container is kept between a minimum and a maximum value during discharge.
- the filling container and the storage container By using two containers arranged in a cascade, the filling container and the storage container, it is sufficient to keep just enough fresh concrete in the filling container for the pouring process, so that the weight load caused by the fresh concrete contained therein, as well as any shock loads and associated deformations and bending of the filling container, are minimized.
- This makes it possible to position the outlet opening(s) of the filling container just above the tensioned rovings and thus to pour the fresh concrete onto the rovings from a low height, so that the transverse force acting on the rovings and thus the risk of breakage are minimized.
- the outlet opening(s) of the filling container is moved at a normal distance of 3 - 100mm, in particular 3 - 15mm, above the rovings.
- the hopper or its outlet opening(s) can be infinitely adjusted in height.
- the concrete is refilled from the storage container into the filling container in such a way that the fill level in the filling container is constantly kept between a minimum and a maximum value during the concrete pouring process.
- This ensures, on the one hand, that only the amount of fresh concrete required is present in the filling container at any given time and, on the other hand, limits the hydrostatic pressure exerted by the fresh concrete in the filling container on the fresh concrete already present in the formwork. In particular, this is intended to prevent the hydrostatic pressure from causing the concrete in the formwork to swell up and thus the desired concrete thickness from being exceeded.
- a control loop is preferably provided in which the current fill level represents the controlled variable and the refilled volume flow represents the manipulated variable.
- the filling container is preferably moved longitudinally in an automated manner, i.e. by means of an automatic drive.
- the drive can be designed, for example, as an electric motor or hydraulic drive.
- the filling container is moved longitudinally in particular at a constant speed.
- the filling container is moved, for example, on wheels or in a sliding guide.
- the one or more outlet openings may have an adjustable outlet cross-section in order to to regulate the volume flow through the outlet opening(s). This ensures that only as much concrete can flow from the outlet opening(s), particularly the funnel-shaped ones, into the formwork as is required for the desired thickness of the concrete slab.
- the storage container is moved synchronously with the filling container in the longitudinal direction of the formwork, while it is decoupled from the filling container in the vertical direction.
- the decoupling here means that the storage container has a support that is independent of the filling container, so that no vertical forces are exerted by the storage container on the filling container.
- the storage container preferably extends substantially over the entire width of the formwork, with the concrete being refilled into the bulk container via a plurality of discharge openings distributed over the width of the storage container, with the refilling preferably taking place by means of at least one conveyor device, preferably a plurality of conveyor devices each assigned to a discharge opening.
- the conveyor device can, for example, be designed to achieve an even distribution of the fresh concrete along the entire width of the storage container, so that a correspondingly even filling of the bulk container is achieved.
- the conveyor device can preferably comprise a spiked roller extending over the entire width of the storage container.
- several conveying devices can be provided which are distributed across the width of the storage container and which convey the fresh concrete via a respective discharge opening into the bulk container located below. Such conveying devices can be designed, for example, as slides or as screw conveyors.
- a preferred embodiment provides that the monitoring of the fill level in successive width sections of the filling container takes place separately from one another using a fill level sensor arranged in the respective width section, wherein the fill level measurements of each fill level sensor are used to regulate the refilling of the concrete via the discharge opening that is located in the same width section as the respective fill level sensor.
- the fill level in the filling container is regulated separately in each width section from other width sections, so that any level differences along the width of the filling container can be taken into account and compensated for.
- a screeding device extending over the entire width of the concrete slab to be produced is pulled over the concrete poured into the formwork, following the filling container, wherein the screeding device is preferably designed as rigid or flexible screeding support is designed, which rests on the surface of the concrete and is pulled behind the outlet opening of the hopper.
- the screeding device is preferably attached to the hopper, in particular to the rear side in the direction of travel. The screeding device prevents the fresh concrete from being pushed up by the hydrostatic pressure coming from the hopper.
- a liquid such as water is applied to the screed pad across its width and is allowed to run over the rear edge of the screed pad onto the surface of the concrete.
- This forms a layer of water on the fresh concrete surface, which ensures defined setting conditions for the concrete. Because the liquid is not applied directly to the concrete, but first to the screed pad, this prevents the applied liquid from getting onto the concrete unevenly and damaging the surface until it has finally hardened.
- a layer of liquid 1-2 cm thick is preferably applied.
- a device for producing a concrete slab from prestressed concrete comprising a filling container for discharging concrete into a formwork, wherein the filling container has an adjustable outlet opening extending substantially over the entire width of the concrete slab to be produced or several adjustable outlet openings arranged distributed over the width and is arranged to be movable in a longitudinal direction running transversely to the width, and further comprising a storage container for refilling concrete into the filling container with at least one conveying device, wherein the bulk container has at least one fill level sensor for monitoring the fill level during the spreading of the concrete, the measured values of which are fed to a control unit which cooperates with the at least one conveying device of the storage container in order to regulate the amount of refilled concrete in such a way that the fill level in the bulk container is kept between a minimum and a maximum value during the spreading.
- the minimum value corresponds to 60-80% of the maximum value.
- control unit is designed for continuous, controlled refilling of the concrete into the hopper.
- the storage container extends substantially over the entire width of the formwork and has a plurality of discharge openings distributed over the width of the storage container, wherein preferably at least one conveying device, preferably a plurality of conveying devices each assigned to a discharge opening, is or are arranged for discharging the concrete into the filling container.
- a fill level sensor is preferably arranged in each width section, the fill level measurement values of the fill level sensors being fed to the control unit, which is set up to use the fill level measurement values of each fill level sensor to control the refilling of the concrete over that of the Application openings that are located in the same width section as the respective level sensor.
- the outlet opening(s) of the bulk container is/are arranged at a normal distance of 3-100mm, in particular 3-15mm, above the rovings.
- a stripping device extending over the entire width of the concrete slab to be produced is arranged downstream of the filling container, wherein the stripping device is preferably designed as a rigid or flexible stripping support which can be pulled along behind the outlet opening of the filling container while resting on the surface of the concrete.
- liquid nozzles can be provided which are directed at the screed pad in order to apply the liquid to the screed pad evenly across its width.
- the liquid can be used to carry out a post-treatment of the concrete.
- Fig. 1 shows a plan view of a production table including formwork for the production of concrete slabs
- Fig. 2 shows a section through a device for introducing fresh concrete into the formwork.
- a production or formwork table 1 is shown, on the edges of which holding elements 2, 3, 4 and 5 are arranged, wherein between opposite holding elements 2 and 4 or 3 and 5 a plurality of carbon rovings 6, 7 are stretched, wherein a group of Carbon rovings 6 cross another group of carbon rovings 7 and at least two layers of carbon rovings are arranged one above the other.
- the carbon rovings thus span the production table 1 in two mutually perpendicular directions.
- Fig. 2 shows how the fresh concrete is introduced into the formwork.
- a filling container 10 here a filling funnel, extending over the entire width of the formwork is moved in the direction of the arrow 12 in the longitudinal direction over the formwork, while fresh concrete from the filling container 10 is fed onto the production table 1. Since the filling container 10 only holds a relatively small volume of concrete, a storage container 11 is moved synchronously with the filling container 10 above the filling container 10, from which concrete is refilled into the filling container 10. The storage container 11 itself is in turn filled with concrete by pouring in fresh concrete as indicated by 13.
- the storage container 11 has several discharge openings 15 distributed over the width, through which concrete is fed into the Bulk container 10.
- Bulk container 10 in turn has a funnel-shaped outlet opening 16 which extends across the entire width of bulk container 10 and through which the concrete 17 runs onto production table 1.
- a screeding pad 18 is attached to the trailing side of bulk container 10 in the direction of travel 12. This screeding pad 18 is pulled over the fresh concrete and smoothes the concrete surface to a defined height.
- a film 19 can be arranged on the screeding pad 18, which protrudes over the edge of screeding pad 18 on the rear side and is also pulled over the concrete surface.
- a liquid is also applied to screeding pad 18 across the width by means of nozzles 20, which liquid is allowed to run over the rear edge of screeding pad 18 in the direction of travel 12, or of film 19 if present, onto the surface of the concrete.
- a fill level sensor 23 is provided, the measured values of which are fed to a control unit 22, whereby the control generates control signals for the slide or screw conveyor 14 in order to keep the fill level in the bulk container 10 within predetermined limits.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Automation & Control Theory (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22020492.9A EP4357092A1 (de) | 2022-10-17 | 2022-10-17 | Verfahren und vorrichtungzur herstellung einer betonplatte aus vorgespanntem beton |
| PCT/IB2023/060405 WO2024084370A1 (de) | 2022-10-17 | 2023-10-16 | Verfahren und vorrichtung zur herstellung einer betonplatte aus vorgespanntem beton |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4605192A1 true EP4605192A1 (de) | 2025-08-27 |
Family
ID=84331673
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22020492.9A Withdrawn EP4357092A1 (de) | 2022-10-17 | 2022-10-17 | Verfahren und vorrichtungzur herstellung einer betonplatte aus vorgespanntem beton |
| EP23790410.7A Pending EP4605192A1 (de) | 2022-10-17 | 2023-10-16 | Verfahren und vorrichtung zur herstellung einer betonplatte aus vorgespanntem beton |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22020492.9A Withdrawn EP4357092A1 (de) | 2022-10-17 | 2022-10-17 | Verfahren und vorrichtungzur herstellung einer betonplatte aus vorgespanntem beton |
Country Status (4)
| Country | Link |
|---|---|
| EP (2) | EP4357092A1 (de) |
| AU (1) | AU2023364638A1 (de) |
| CA (1) | CA3270167A1 (de) |
| WO (1) | WO2024084370A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118528411B (zh) * | 2024-05-16 | 2024-11-19 | 中建三局集团有限公司 | 一种建筑工程施工混凝土浇筑装置 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE905842A (fr) * | 1986-12-01 | 1987-06-01 | Cooperative Axcel Soc | Dispositif pour ajuster la hauteur de blocs de construction et analogues. |
| DE102008015067B3 (de) * | 2008-03-19 | 2009-11-26 | Weckenmann Anlagentechnik Gmbh & Co. Kg | Vorrichtung zur Herstellung von Beton-Fertigteilen |
| EP4206413B1 (de) | 2012-09-17 | 2025-01-29 | Cpc Ag | Vorgespannte betonbauteile und verfahren zur herstellung vorgespannter betonbauteile |
| CN103707404B (zh) * | 2013-12-24 | 2015-09-30 | 河北雪龙机械制造有限公司 | 混凝土构件生产系统中用的布料机 |
| CN108000695A (zh) * | 2018-01-05 | 2018-05-08 | 河北益铁机电科技有限公司 | 先张法预应力混凝土轨道板生产线浇筑振捣系统及其应用 |
-
2022
- 2022-10-17 EP EP22020492.9A patent/EP4357092A1/de not_active Withdrawn
-
2023
- 2023-10-16 CA CA3270167A patent/CA3270167A1/en active Pending
- 2023-10-16 AU AU2023364638A patent/AU2023364638A1/en active Pending
- 2023-10-16 EP EP23790410.7A patent/EP4605192A1/de active Pending
- 2023-10-16 WO PCT/IB2023/060405 patent/WO2024084370A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP4357092A1 (de) | 2024-04-24 |
| AU2023364638A1 (en) | 2025-04-10 |
| CA3270167A1 (en) | 2025-04-19 |
| WO2024084370A1 (de) | 2024-04-25 |
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Legal Events
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