EP1188528B1 - Verfahren und System zur Herstellung einer Verbundplatte und Verbundplatte - Google Patents

Verfahren und System zur Herstellung einer Verbundplatte und Verbundplatte Download PDF

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Publication number
EP1188528B1
EP1188528B1 EP00660158A EP00660158A EP1188528B1 EP 1188528 B1 EP1188528 B1 EP 1188528B1 EP 00660158 A EP00660158 A EP 00660158A EP 00660158 A EP00660158 A EP 00660158A EP 1188528 B1 EP1188528 B1 EP 1188528B1
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EP
European Patent Office
Prior art keywords
slab
hollow
core
core slab
spacer elements
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.)
Expired - Lifetime
Application number
EP00660158A
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English (en)
French (fr)
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EP1188528A1 (de
Inventor
Hannu Tomminen
Veikko Jääskö
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Drivetec Oy
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Drivetec Oy
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Publication of EP1188528A1 publication Critical patent/EP1188528A1/de
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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
    • 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
    • B28B23/028—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 for double - wall articles
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/084—Producing shaped prefabricated articles from the material by vibrating or jolting the vibrating moulds or cores being moved horizontally for making strands of moulded articles
    • 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
    • B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations

Definitions

  • Such prior-art composite slabs are manufactured by casting the hollow-core slab on one prestressing bed and the surface slab on another prestressing bed. In other words, a separate prestressing bed is needed for each slab.
  • the slabs are cast at factory in lengths of 120 - 180 m, and after curing they are cut into fixed sizes. The use of two prestressing beds thus involves the problem that a considerable factory floor area is needed for the making of a single composite slab. Such a manufacturing process represents the closest prior art for the present invention.
  • a further problem is that, since the slabs cannot be removed from their prestressing beds before they have hardened sufficiently, a single composite slab being made occupies two prestressing beds during its hardening time, which is relatively long, i.e. about 8 - 12 hours, during which the beds cannot be used for other production purposes, so the degree of utilization of the equipment remains low.
  • the surface slab After each slab has hardened and been cut, the surface slab is moved onto the hollow-core slab, on which it is supported by spacer elements. This necessitates moving the surface slab inside the factory and requires appropriate conveyance equipment.
  • the upper surface of the hollow-core slab is in practice not exactly even and planar; instead, it always comprises distortions of shape, such as bulges and pits.
  • the lower surface of the surface slab is even and planar as it has been formed on the even prestressing bed.
  • the object of the invention is to eliminate the problems referred to above.
  • a specific object of the invention is to disclose a method and system that will make it possible to manufacture a composite slab in factory at an economic cost so that a maximum degree of utilization of the production equipment can be maintained.
  • a further object of the invention is to disclose a method and system that will make it possible to use spacer elements between the slabs that are all identical and of the same thickness, without having to be separately fitted and adjusted to different dimensions.
  • a further object of the invention is to disclose a composite slab which can be produced at an economic cost and has good sound insulation properties.
  • the method of the invention is characterized by what is presented in claim 1.
  • the system of the invention is characterized by what is presented in claim 8.
  • the composite slab of the invention is characterized by what is presented in claim 16.
  • the hollow-core slab is cast on a prestressing bed.
  • the surface slab is cast directly onto the hollow-core slab so that the upper surface of the hollow-core slab acts as a mould for the lower surface of the surface slab, so that the lower surface of the surface slab is given a surface relief that is complementary to the upper surface of the hollow-core slab.
  • the system of the invention comprises an elongated prestressing bed and a first casting device for casting a hollow-core slab onto a prestressing bed.
  • the system comprises a second casting device, which has been arranged to cast the a slab onto the upper surface of the hollow-core slab so that the upper surface of the hollow-core slab acts as a mould for the lower surface of the surface slab so as to give the lower surface of the surface slab a surface relief that is complementary to the upper surface of the hollow-core slab.
  • the invention provides the advantage that both the hollow-core slab and the surface slab can be cast on the same prestressing bed, thus allowing more effective space utilization in the factory and improving its degree of utilization. Further advantages include the facts that the surface slab need not be separately moved on the manufacturing premises and that no special conveyance equipment is needed for that purpose. A further advantage is that spacer elements having a predetermined height, i.e. an equal thickness, can be used, and that they need not be separately dimensioned for each particular mounting position. A composite slab is produced that is exactly of a standard thickness in its entire area and in which an equal load is applied to all spacer elements. The accuracy of the measurements of the structure also reduces the smoothing costs. Placed inside the hollow-core slab are conventionally prestressed prestressing steel bars placed longitudinally relative to the slab. Upward warping of the hollow-core slabs is reduced because the load of the surface slab is already on the slab when the prestressing tension is released.
  • the surface slab is raised above the hollow-core slab to form a clearance between the upper surface of the hollow-core slab and the lower surface of the surface slab.
  • the spacer elements are placed between the upper surface of the hollow-core slab and the lower surface of the surface slab. The surface slab is lowered onto the spacer elements.
  • a releasing medium adaptable to the shapes of the upper surface of the hollow-core slab is placed upon the hollow-core slab.
  • the surface slab is preferably cast upon the releasing medium while the hollow-core slab is still in a substantially unhardened state.
  • a releasing medium is needed especially when the surface slab is cast on top of a hollow-core slab that has been recently cast and has not yet hardened, because otherwise the slabs might stick to each other and could not be separated from each other after they had hardened.
  • the releasing medium may be e.g. a liquid substance which can be sprayed as a thin layer onto the upper surface of the hollow-core slab.
  • the releasing medium may also consist of a web-like thin film, e.g. a plastic film or paper or the like, which can be unreeled from a roll and applied onto the upper surface of the hollow-core slab and which adapts itself to the shapes of the upper surface.
  • the spacer elements comprise a number of equally thick spacer pieces, which are placed between the hollow-core slab and the surface slab in an area close to their longitudinal edges at a distance from each other.
  • the composite slab after the composite slab has hardened, it is cut into a suitable size.
  • the surface slab is cut at both ends so as to make it somewhat shorter than the hollow-core slab.
  • the combination thus obtained is covered with a heat insulating covering to promote hardening.
  • the system comprises a hoisting device for moving the surface slab vertically in relation to the hollow-core slab.
  • the system comprises a spacer mounting device for setting the spacer elements between the upper surface of the hollow-core slab and the lower surface of the surface slab.
  • the system comprises an application device arranged to apply a releasing medium onto the upper surface of the hollow-core slab before the casting of the surface slab.
  • the spacer elements comprise a number of spacer pieces of equal thickness.
  • the spacer mounting device has been arranged to place the spacer pieces in an area near the longitudinal edges of the hollow-core and surface slabs at a distance from each other.
  • the system comprises a cutting apparatus for cutting the hollow-core and surface slabs.
  • the cutting apparatus comprises a first cutting device for cutting the surface slab and a second cutting device for cutting the hollow-core slab.
  • the system comprises guide rails disposed near the prestressing bed in a direction parallel to the longitudinal direction of the prestressing bed, and a first casting device, a second casting device, the hoisting device, the spacer mounting device, the device for applying a releasing medium and/or the cutting apparatus are mounted on a frame arranged to be movable along the guide rails.
  • a hollow-core slab 1 is first cast on a fixed prestressing bed 4 by the extrusion method as known in prior art, using a first casting device 10.
  • the prestressing bed 4 is an elongated mould made of steel, and the hollow-core slab 1 is cast onto the planar, horizontal upper surface of this mould.
  • the first casting device 10 is presented diagrammatically, and in structure it may be an extruder as known in the art.
  • the first casting device 10 comprises a first frame 19 extending transversely across the prestressing bed like a portal and provided with wheels supporting it on the guide rails 17, 18.
  • a supply funnel supplies concrete to power-driven extrusion screws (not shown in the figure), which form the longitudinal hollow spaces in the hollow-core slab.
  • the device 10 driven by the thrust of the extrusion screws, advances along the top of the prestressing bed.
  • the device is provided with a vibrator or some other compacting device (not shown) for compacting the concrete.
  • the casting device 10 further comprises side templates 26 which shape the side surfaces of the hollow-core slab, and a top template 27 which shapes the upper surface 5 of the hollow-core slab.
  • Fig. 2 shows a somewhat exaggerated view of the shapes of a hollow-core slab 1 as it is after the casting.
  • the lower surface of the hollow-core slab 1 becomes even as it lies against the prestressing bed 4, whereas the upper surface 5 always has various surface defects, defects of smoothness and planarity, pits and bulges.
  • Fig. 3 illustrates a step comprised in the method wherein a releasing medium 7 is sprayed onto the upper surface 5 of a hollow-core slab 1 that has just been cast and has not yet hardened.
  • the purpose of the releasing medium 7 is to prevent the surface slab 3, to be cast next onto the hollow-core slab, 1 from sticking to the latter.
  • the releasing medium 7 is sprayed by means of a spraying device 14.
  • the spraying device 14 is mounted on second frame 20 extending transversely across the prestressing bed like a portal.
  • the second frame is provided with wheels supporting it on the guide rails 17, 18 so that the spraying device 14 can be moved in the longitudinal direction of the hollow-core slab.
  • the releasing medium 7 may alternatively consist of a thin material, such as plastic film or paper, in the form of a web, which adapts itself perfectly to the shapes of the upper surface 5.
  • the second frame 20 carries a reeling device (not shown in the figures) from which the rolled-up web material can be unrolled onto the upper surface 5 while the frame 20 is moved longitudinally relative to the hollow-core slab.
  • Fig. 4 illustrates the next step in the method, wherein a reinforced concrete surface slab 3 is cast directly onto the upper surface 5 of the hollow-core slab 1 so that the upper surface 5 of the hollow-core slab functions as a mould for the lower surface 6 of the surface slab 3.
  • the surface slab 3 is cast using a second casting device 11, which is a so-called slipforming casting device.
  • the slipforming casting device 11 comprises a third frame 21 extending transversely over the prestressing bed and provided with wheels supporting it on the guide rails 17, 18.
  • the lateral and top surfaces of the surface slab 3 are likewise formed by means of side templates 28 and a top surface template 29.
  • the surface slab 3 is cast so as to make it somewhat narrower than the hollow-core slab 1 to ensure that the joints between the hollow-core slabs can be later successfully sealed on the building site.
  • the lower surface 6 of the surface slab 3 is formed into a shape that is perfectly complementary to the upper surface 5 of the hollow-core slab 1.
  • Fig. 6 illustrates the next step in the method, wherein the hollow-core slab 1 and the surface slab 3 placed on top of it are covered with a heat insulating covering 25 to promote hardening. After the concrete has hardened, the covering is removed.
  • Fig. 7 illustrates a step in the method wherein the surface slab 3, which has now reached a sufficient strength, is cut at both ends by means of a first cutting device 15 to make it somewhat shorter than the designed length of the hollow-core slab 1 under it.
  • the waste portions thus cut off are removed, whereupon the hollow-core slab 1 is cut to its fixed length using a second cutting device 16.
  • the cutting devices 15 and 16 may be e.g. circular saws movably mounted on a fourth frame 22 extending like a portal transversely across the prestressing bed 4 and provided with wheels supporting it on the guide rails 17, 18.
  • Fig. 8 a step in the method wherein the surface slab 3 is raised vertically above the hollow-core slab 1 by means of a hoisting device 12 so as to create a clearance between the upper surface 5 of the hollow-core slab and the lower surface 6 of the surface slab.
  • the hoisting device 12 has been arranged to raise and lower the surface slab exactly vertically so that no lateral displacement occurs between the surface slab 3 and the hollow-core slab 12.
  • spacer elements 2 are inserted between the upper surface 5 of the hollow-core slab and the lower surface 6 of the surface slab by using a spacer mounting device 13.
  • the spacer mounting device 13 comprises e.g.
  • a transferring arm arranged to be movable in a horizontal direction and provided with gripping elements at one end for gripping the spacer 2.
  • the transferring arm is inserted into the clearance between the upper surface 5 of the hollow-core slab and the lower surface 6 of the surface slab and it sets the spacer into a predetermined position.
  • the hoisting device 12 and the spacer mounting device 13 are mounted on a fifth frame 23, which extends transversely across the prestressing bed like a portal and is provided with wheels that support it on the guide rails 17, 18.
  • the hoisting device 12 comprises grapples which grip the edges of the surface slab.
  • the hoisting device 12 is preferably so implemented that it will raise only a portion of the surface slab while the rest of the surface slab remains resting on the hollow-core slab.
  • the hoisting device 12 can be implemented as a device having a length of a few meters.
  • To mount spacer elements 2 over the entire length of the composite slab, such a hoisting device is moved longitudinally with respect to the surface slab. Raising the surface slab 3 by this point load method in a given portion of it will cause the surface slab to bend, which is why it is necessary to provide at least one, preferably two other supporting points between the lifting point and the point where the two slabs meet, to prevent damage to the surface slab 3.
  • the surface slab 3 is then lowered onto the spacer elements 2 by means of the hoisting device 12.
  • All the spacer elements 2 are pieces having the same thickness.
  • the spacer elements 2 are made of a suitable elastic material, e.g. neoprene rubber or the like, which damps the transmission of sound.
  • the spacer mounting device 13 sets the spacers in the area of the longitudinal edges 8, 9 of the hollow-core and surface slabs at a distance from each other.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Laminated Bodies (AREA)
  • Continuous Casting (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Claims (16)

  1. Verfahren zum Herstellen einer Verbundplatte, die eine Hohlkernplatte (1) und eine Oberflächenplatte (3) aufweist, die darauf angeordnet und durch Abstandselemente (2) aus elastischem Material davon getrennt wird, wobei die Hohlkernplatte auf ein Spannbett (4) gegossen wird,
    dadurch gekennzeichnet, daß die Oberflächenplatte (3) direkt auf die Hohlkernplatte (1) gegossen wird, ohne daß die Abstandselemente in ihrer Position sind, so daß die obere Oberfläche (5) der Hohlkernplatte als eine Form für die untere Oberfläche (6) der Oberflächenplatte (3) dient, so daß dadurch der unteren Oberfläche (6) der Oberflächenplatte ein Oberflächenrelief verliehen wird, das mit der oberen Oberfläche (5) der Hohlkemplatte komplementär ist.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß, nachdem die Oberflächenplatte (3) gegossen worden ist und eine ausreichende Festigkeit erreicht hat, die Oberflächenplatte (3) über die Hohlkernplatte (1) angehoben wird, um einen Zwischenraum zwischen der oberen Oberfläche (5) der Hohlkernplatte und der unteren Oberfläche (6) der Oberflächenplatte zu bilden; die Abstandselemente (2) zwischen der oberen Oberfläche der Hohlkernplatte und der unteren Oberfläche der Oberflächenplatte angeordnet werden; und die Oberflächenplatte auf die Abstandselemente abgesenkt wird.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein Trennmedium (7), das an die Gestalt der oberen Oberfläche (5) der Hohlkemplatte anpaßbar ist, auf die Hohlkernplatte (1) aufgebracht und eine Oberflächenplatte (3) auf das Trennmedium gegossen wird, während die Hohlkernplatte noch in einem im wesentlichen ungehärteten Zustand ist.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Abstandselemente (2) eine Anzahl von Abstandsstücken gleicher Dicke aufweisen, die zwischen der Hohlkernplatte (1) und der Oberflächenplatte (3) in einem Bereich nahe deren Längsrändern (8, 9) in einem Abstand voneinander angeordnet sind.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Verbundplatte nach dem Härten auf eine geeignete Größe zugeschnitten wird.
  6. Verfahren nach Anspruch5, dadurch gekennzeichnet, daß nach dem Zuschneiden der Verbundplatte die Oberflächenplatte (3) an beiden Enden so abgeschnitten wird, daß sie etwas kürzer als die Hohlkernplatte (1) wird.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß nach dem Gießen der Oberflächenplatte (3) auf die Hohlkernplatte (1) die so erhaltene Kombination mit einer wärmedämmenden Abdeckung (25) bedeckt wird, um das Härten zu fördern.
  8. System zum Herstellen einer Verbundplatte, die eine Hohlkernplatte (1) und eine Oberflächenplatte (3) aufweist, die darauf angeordnet und durch Abstandselemente (2) aus elastischem Material davon getrennt ist, wobei das System ein langgestrecktes Spannbett (4) und eine erste Gießeinrichtung (10) zum Gießen der Hohlkernplatte auf das Spannbett aufweist, dadurch gekennzeichnet, daß das System eine zweite Gießeinrichtung (11) aufweist, die so angeordnet worden ist, daß sie die Oberflächenplatte (3) auf die obere Oberfläche (5) der Hohlkemplatte gießt, ohne daß die Abstandselemente in ihrer Position sind, so daß die obere Oberfläche der Hohlkernplatte als eine Form für die untere Oberfläche (6) der Oberflächenplatte dient, um der unteren Oberfläche der Oberflächenplatte ein Oberflächerelief zu verleihen, das mit der oberen Oberfläche der Hohlkernplatte komplementär ist.
  9. System nach Anspruch 9, dadurch gekennzeichnet, daß das System eine Hubeinrichtung (12) aufweist, um die Oberflächenplatte (3) vertikal in bezug auf die Hohlkernplatte (1) zu bewegen.
  10. System nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß das System eine Abstandshalter-Anbringeinrichtung (13) aufweist, um die Abstandselemente (2) zwischen der oberen Oberfläche (5) der Hohlkernplatte (1) und der unteren Oberfläche (6) der Oberflächenplatte (3) anzuordnen.
  11. System nach Anspruch 10, dadurch gekennzeichnet, daß das System eine Einrichtung (14) zum Aufbringen eines Trennmediums aufweist, wobei die Einrichtung so angeordnet ist, daß sie ein Trennmedium (7) auf die obere Oberfläche (5) der Hohlkernplatte (1) aufbringt, bevor die Oberflächenplatte (3) gegossen wird.
  12. System nach Anspruch 10 oder 11, dadurch gekennzeichnet, daß die Abstandselemente (2) eine Anzahl von Abstandshaltern gleicher Dicke aufweisen; und daß die Abstandshalter-Anbringeinrichtung (13) so angeordnet worden ist, daß sie die Abstandshalter in einem Bereich nahe den Längsrändern (8, 9) der Hohlkern- und Oberflächenplatten in einem Abstand voneinander anordnet.
  13. System nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, daß das System eine Schneidvorrichtung (15, 16) zum Schneiden der Hohlkern- und Oberflächenplatten aufweist.
  14. System nach einem der Ansprüche 8 bis 13, dadurch gekennzeichnet, daß die Schneidvorrichtung (15, 16) eine erste Schneideinrichtung (15) zum Schneiden der Oberflächenplatte und eine zweite Schneideinrichtung (16) zum Schneiden der Hohlkernplatte aufweist.
  15. System nach einem der Ansprüche 8 bis 14, dadurch gekennzeichnet, daß das System Führungsschienen (17, 18) aufweist, die nahe dem Spannbett (4) in einer Richtung parallel zu der Längsrichtung des Spannbetts angeordnet sind, und daß die erste Gießeinrichtung (10), die zweite Gießeinrichtung (11), die Hubeinrichtung (12), die Abstandshalter-Anbringeinrichtung (13), die Einrichtung (14) zum Aufbringen eines Trennmediums und/oder die Schneidvorrichtung (15, 16) an einem Rahmen (19, 20, 21, 22, 23) angebracht sind/ist, der so angeordnet ist, daß er entlang den Führungsschienen (17, 18) bewegbar ist.
  16. Verbundplatte, die eine Hohlkernplatte (1) und eine Oberflächenplatte (3) aufweist, die darauf angeordnet und durch Abstandselemente (2) aus einem elastischen Material davon getrennt ist, dadurch gekennzeichnet , daß das nicht-planare Oberflächenprofil der unteren Oberfläche (6) der Oberflächenplatte (3) in dem gesamten Bereich der unteren Oberfläche mit dem Oberflächenprofil der nicht-planaren oberen Oberfläche (5) der Hohlkernplatte (1) komplementär ist, so daß alle Deformationen der Gestalt der genannten Oberflächen wie etwa Ausbauchungen und Vertiefungen spiegelbildlich in den beiden gegenüberliegenden Oberflächen wiederholt sind; und daß die Abstandselemente (2) gleiche Dicke haben.
EP00660158A 1999-09-24 2000-09-18 Verfahren und System zur Herstellung einer Verbundplatte und Verbundplatte Expired - Lifetime EP1188528B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI992055A FI19992055A (fi) 1999-09-24 1999-09-24 Menetelmä ja järjestelmä yhdistelmälaatan valmistamiseksi sekä yhdistelmälaatta
FI992055 1999-09-24

Publications (2)

Publication Number Publication Date
EP1188528A1 EP1188528A1 (de) 2002-03-20
EP1188528B1 true EP1188528B1 (de) 2004-08-04

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ID=8555348

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Application Number Title Priority Date Filing Date
EP00660158A Expired - Lifetime EP1188528B1 (de) 1999-09-24 2000-09-18 Verfahren und System zur Herstellung einer Verbundplatte und Verbundplatte

Country Status (5)

Country Link
EP (1) EP1188528B1 (de)
AT (1) ATE272476T1 (de)
DE (1) DE60012737T2 (de)
ES (1) ES2225066T3 (de)
FI (1) FI19992055A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7708917B2 (en) 2003-10-20 2010-05-04 Elematic Oy Ab Method and apparatus for casting concrete elements

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3553797A (en) * 1968-02-14 1971-01-12 Robert J Horton Apparatus for casting structural units for building construction
AT321805B (de) * 1971-12-20 1975-04-25 Ziegelwerk Baernbach Inh Amadi Verfahren und Vorrichtung zur Herstellung von Bauteilen
DE2215553A1 (de) * 1972-03-30 1973-10-11 Fricker Frimeda Metall Draht Verfahren und vorrichtung zum herstellen von sandwichplatten mit hinterluefteter fassadenplatte
BE855262A (nl) * 1977-06-01 1977-12-01 Houben Ludovicus Werkwijze voor het vervaardigen van geprefabriceerde spouwmuren, spouwmuren verkregen door toepassing van deze werkwijze en gereedschappen gebruikt bij deze werwije
GB2256380A (en) * 1991-06-06 1992-12-09 John Anthony Douglas Br Durham Device for plaster/mortar mix topping a prefabricated concrete slab.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7708917B2 (en) 2003-10-20 2010-05-04 Elematic Oy Ab Method and apparatus for casting concrete elements

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ATE272476T1 (de) 2004-08-15
DE60012737T2 (de) 2005-08-04
FI19992055A (fi) 2001-03-24
EP1188528A1 (de) 2002-03-20
DE60012737D1 (de) 2004-09-09
ES2225066T3 (es) 2005-03-16

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