EP0026803B1 - Construction joint shuttering comprising a former for supporting connecting bars - Google Patents

Construction joint shuttering comprising a former for supporting connecting bars Download PDF

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Publication number
EP0026803B1
EP0026803B1 EP79810113A EP79810113A EP0026803B1 EP 0026803 B1 EP0026803 B1 EP 0026803B1 EP 79810113 A EP79810113 A EP 79810113A EP 79810113 A EP79810113 A EP 79810113A EP 0026803 B1 EP0026803 B1 EP 0026803B1
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EP
European Patent Office
Prior art keywords
troughs
end sections
base pan
concreted
embedding mass
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
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EP79810113A
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German (de)
French (fr)
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EP0026803A1 (en
Inventor
Hans Dietrich
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Losinger Holding AG
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Losinger AG
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Publication date
Priority to EP79810113A priority Critical patent/EP0026803B1/en
Application filed by Losinger AG filed Critical Losinger AG
Priority to AT79810113T priority patent/ATE2155T1/en
Priority to DE7979810113T priority patent/DE2964428D1/en
Priority to PCT/CH1980/000121 priority patent/WO1981001025A1/en
Priority to AU63367/80A priority patent/AU535851B2/en
Priority to CA000361406A priority patent/CA1144774A/en
Priority to JP50217580A priority patent/JPS56501253A/ja
Priority to US06/269,048 priority patent/US4419852A/en
Publication of EP0026803A1 publication Critical patent/EP0026803A1/en
Application granted granted Critical
Publication of EP0026803B1 publication Critical patent/EP0026803B1/en
Priority to HK518/86A priority patent/HK51886A/en
Priority to MY429/86A priority patent/MY8600429A/en
Expired legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/125—Reinforcement continuity box

Definitions

  • the invention is based on a shuttering device which is attached to the formwork of the component to be concreted in the manufacture of two components to be concreted at different times, with a narrow, rectangular base shell in plan view and with connecting rods, one end section of which is different from the other End sections are bent approximately at right angles, are inserted in the base shell.
  • room joints also called dilation joints
  • construction joints While the former form a permanent delimitation of one component from another, the latter are only necessary for design reasons; later they are intended to ensure a force-fit connection that largely corresponds to the monolithically cast parts.
  • connecting rods in such a connection.
  • the parts of the connecting rods projecting from the component to be concreted first are bent approximately at right angles and fastened to the formwork or near the formwork in such a way that you can bend it out or back out after stripping.
  • a formwork device as described above, which device is inserted and fastened in the formwork and when concreting the formation of a cavity all around the end sections of the connecting rods to be bent out.
  • Such formwork devices are already known in various designs, u. a. from DE-PS 2 307 073 and from CH-PS 562 376.
  • the first of these prior publications discloses a shuttering device which consists of back, chest and intermediate spacer strips and is made of an elastically deformable material. The manufacture of this device is very expensive, but has the advantage of being easily removed from the first concrete component.
  • the element consists of a foam body in which the end portions of the connecting rods to be bent out are embedded. This solution has been widely used; the scraping out of the foam necessary after the formwork of the first concreted component is time-consuming and associated with the risk that residues which disrupt the positive connection of the subsequent concrete part remain stuck in the construction joint.
  • the invention has for its object to provide an embodiment of the type of shuttering device described above, which retains the advantages of the previously known embodiments without their disadvantages.
  • the manufacture should not only be inexpensive, but should also be able to remove the device which is no longer required after the formwork of the first concrete component has been removed.
  • silicate such as e.g. B. gypsum sawdust mixture or foam concrete
  • additives such as B. bentonite
  • the adhesion of the embedding compound to the component concrete can also be coated with a release agent, such as. B. White lime, avoid easily.
  • a release agent such as. B. White lime
  • elevations are formed on the longitudinal edges of the base shell delimiting the troughs, which elevations adjoin the convex side of the bending sections of the connecting rods protruding from the troughs.
  • the side of the securing strips facing away from the embedding compound and / or the free surface of the embedding compound is provided with a coating consisting of a cement setting retarder.
  • the formwork device described here is used in a formwork 1, which is intended for a concrete component 2, and is used to receive end sections 3b of the connecting rods 3 to be anchored in this concrete component 2 with their U-shaped part 3a.
  • the arrangement of the end sections 3b described above largely determines the shape of two rows of troughs 6 which are formed in the base shell 5.
  • This consists mainly of a thin-walled, thermoplastic material such as. B. polystyrene, e.g. B. formed in the pressing or deep-drawing process, which has open troughs 6, from which the anchoring parts 3a protrude to one of its sides, which is intended to be placed on the component to be concreted.
  • These troughs 6 receiving the end sections 3b are otherwise filled with an embedding compound 7 which was doughy when introduced, but is brittle in the hardened state and does not adhere to the connecting rods or to the molded plastic part, so that it subsequently - as described below - can be easily removed.
  • an embedding compound z. B.
  • the device forms a rigid, dimensionally stable structural unit which can be easily transported, handled and attached to a formwork 1.
  • the element 5 is provided with nail passage holes 9 in its longitudinal edge regions.
  • Elevations 5c, 5d are formed in the latter, one wall part of which - as can be seen in FIG. 2 - lies in the continuation of a curved trough wall part and adjoins the convex side of the bending sections 3c of the connecting rods 3 protruding from the troughs 6. It is thereby achieved that cavities are formed in the concrete of the component 2 behind the bending sections 3c and so that the later bending back of these sections is practically not hindered.
  • the troughs 6 have a cross section which is slightly widened from the bottom to the flat side 5a, which facilitates the shaping of the base shell 5 during its manufacture. Because of the lack of adhesion of the embedding compound 7 to the basic formwork 5, there was a risk that it, together with the connecting rods 3, could fall out of the depressions 6, flat, e.g. B. made of polystyrene, extending across the troughs 6, in the same area to the embedding compound 7 securing strips 8 releasably attached to the wall 5a of the basic circuit 5 forming the flat side, z. B. by spot welding, adhesive connection or by means of rivets, bolts or the like.
  • the troughs 6 could constrict towards the flat side, e.g. B. have a trapezoidal cross-section so that the embedding compound 7 is held in a form-fitting manner in them.
  • security strips 8 can be dispensed with.
  • the adhesion of the embedding compound 7 to component 2 can be achieved by painting the free surface of this compound with a release agent, such as. B. white lime can be avoided.
  • the side of the securing strip 8 facing away from the embedding compound 7 can be profiled, e.g. B. have a grooving, so that the resulting surface parts of the component 2 receive a corresponding profile, which contributes to the roughening of the subsequently obtained construction joint.
  • This side and / or the free surface of the embedding can be used for the same purpose be provided with a coating consisting of a cement setting retarder; the unfinished surface layer parts on the structure 2 can then be sprayed with water after removal of the device.
  • the brittle embedding compound 7 is to be removed, which can be done by administering a few hammer blows on the end sections 3b of the connecting rods 3. Before or after the bending out of these end sections 3b into the straight continuation of the legs of the anchored section 3a, the securing strips 8 which may be used must also be removed.
  • the device is widely used in the production of construction joints in reinforced concrete structures of any kind, e.g. B. when connecting partitions, steps, light wells, intermediate floors, silo ceilings, etc., z. B. on a main wall.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Foundations (AREA)
  • Cameras Adapted For Combination With Other Photographic Or Optical Apparatuses (AREA)
  • Cookers (AREA)
  • Food-Manufacturing Devices (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

PCT No. PCT/CH80/00121 Sec. 371 Date May 28, 1981 Sec. 102(e) Date May 28, 1981 PCT Filed Oct. 2, 1980 PCT Pub. No. WO81/01025 PCT Pub. Date Apr. 16, 1981.A preserving element (5) formed as a synthetic material mould part has preserving troughs (6) in which the bent end sections (3b) of connecting bars (3), later to be bent out, are embedded with a brittle mass (7). The device has the advantage that after the anchoring of the connecting bars (at 3a) in the structural member (2), the element (5) and the mass (7) can be easily removed. The device forms an easily transported and handled structural unit which is usable in the production of construction joints of steel concrete structures of any kind.

Description

Die Erfindung geht aus von einer Abschalungsvorrichtung, welche bei der Herstellung von zwei zeitlich verschoben zu betonierenden Bauteilen an die Schalung des erst zu betonierenden Bauteiles befestigt wird, mit einer in Draufsicht schmalen, rechteckigen Grundschale und mit Verbindungsstäben, deren einen Endabschnitte, die von den anderen Endabschnitten annähernd rechtwinklig abgebogen sind, in der Grundschale eingelegt sind.The invention is based on a shuttering device which is attached to the formwork of the component to be concreted in the manufacture of two components to be concreted at different times, with a narrow, rectangular base shell in plan view and with connecting rods, one end section of which is different from the other End sections are bent approximately at right angles, are inserted in the base shell.

Bei der Herstellung von Betonbauteilen wird zwischen Raumfugen (auch Dilatationsfugen genannt) und Arbeitsfugen unterschieden. Während die erstgenannten eine dauernde Abgrenzung eines Bauteiles gegenüber einem anderen bilden, sind die zweitgenannten nur aus ausführungstechnischen Gründen nötig; sie sollen später eine kraftschlüssige, den monolithisch gegossenen Teilen weitgehend entsprechende Verbindung gewährleisten.When manufacturing concrete components, a distinction is made between room joints (also called dilation joints) and construction joints. While the former form a permanent delimitation of one component from another, the latter are only necessary for design reasons; later they are intended to ensure a force-fit connection that largely corresponds to the monolithically cast parts.

Es ist üblich, an einer solchen Verbindung Verbindungsstäbe zu beteiligen. Um in der Abschalung der Arbeitsfuge nicht Löcher vorsehen zu müssen, durch welche sich solche Verbindungsstäbe hindurch erstrecken, biegt man die von dem erst zu betonierenden Bauteil ausragenden Teile der Verbindungsstäbe zuerst annähernd rechtwinklig ab und befestigt sie so an die Schalung oder nahe der Schalung, daß man sie nach dem Ausschalen wieder heraus-oder zurückbiegen kann. Um dabei die abgebogenen Teile der Verbindungsstäbe frei vom Beton zu halten und das erwähnte Heraus- und Zurückbiegen zu erleichtern, bedient man sich manchmal einer Abschalungsvorrichtung wie oben beschrieben, welche Vorrichtung in die Schalung eingesetzt und befestigt wird und beim Betonieren die Bildung eines Hohlraumes rund um die auszubiegenden Endabschnitte der Verbindungsstäbe gewährleistet..It is common to involve connecting rods in such a connection. In order not to have to provide holes in the formwork of the construction joint through which such connecting rods extend, the parts of the connecting rods projecting from the component to be concreted first are bent approximately at right angles and fastened to the formwork or near the formwork in such a way that you can bend it out or back out after stripping. In order to keep the bent parts of the connecting rods free of the concrete and to facilitate the aforementioned bending out and back bending, one sometimes uses a formwork device as described above, which device is inserted and fastened in the formwork and when concreting the formation of a cavity all around the end sections of the connecting rods to be bent out.

Solche Abschalungsvorrichtungen sind schon in verschiedenen Ausführungen bekannt, u. a. aus der DE-PS 2 307 073 und aus der CH-PS 562 376. Die erstgenannte dieser Vorveröffentlichungen offenbart eine Abschalungsvorrichtung, welche aus Rücken, Brust und zwischenliegenden Abstandleisten besteht und aus einem elastisch verformbaren Werkstoff gefertigt ist. Die Fertigung dieser Vorrichtung ist sehr kostenaufwendig, hat aber den Vorteil des leichten Abziehens vom erstbetonierten Bauteil. Nach der zweiten der beiden obengenannten Veröffentlichungen besteht das Element aus einem Schaumstoffkörper, in welchem die herauszubiegenden Endabschnitte der Verbindungsstäbe eingebettet sind. Diese Lösung hat eine breite Anwendung gefunden; das nach dem Ausschalen des erstbetonierten Bauteiles notwendige Herauskratzen des Schaumstoffes ist aber zeitaufwendig und mit dem Risiko verbunden, daß Rückstände, welche die kraftschlüssige Verbindung des nachkommenden Betonteiles stören, in der Arbeitsfuge haften bleiben.Such formwork devices are already known in various designs, u. a. from DE-PS 2 307 073 and from CH-PS 562 376. The first of these prior publications discloses a shuttering device which consists of back, chest and intermediate spacer strips and is made of an elastically deformable material. The manufacture of this device is very expensive, but has the advantage of being easily removed from the first concrete component. According to the second of the two publications mentioned above, the element consists of a foam body in which the end portions of the connecting rods to be bent out are embedded. This solution has been widely used; the scraping out of the foam necessary after the formwork of the first concreted component is time-consuming and associated with the risk that residues which disrupt the positive connection of the subsequent concrete part remain stuck in the construction joint.

Die kollidierende EP-A1 24 697 gehört gern. Art. 54(3) und (4) EPÜ zum Stand der Technik, ist aber nach Art. 56 nicht zur Beurteilung der erfinderischen Tätigkeit heranzuziehen. Zwar ist bei dieser Vorrichtung auch eine Kunststoffschale vorhanden, da jedoch die Bewehrungsstäbe durch besondere verschließbare Deckel gegenüber dem zuerst eingebrachten Beton geschützt werden, liegt eine andersartige Lösung des Problems vor.The colliding EP-A1 24 697 likes to be heard. Art. 54 (3) and (4) EPC on the state of the art, but according to Art. 56 is not to be used to assess inventive step. A plastic shell is also present in this device, but since the reinforcement bars are protected from the concrete introduced first by means of special lockable covers, there is a different solution to the problem.

Der Erfindung liegt die Aufgabe zugrunde, eine Ausbildung der oben beschriebenen Gattung der Abschalungsvorrichtung anzugeben, welche die Vorteile der vorbekannten Ausführungsarten beibehält, ohne daß ihr deren Nachteile anhaften. Die Herstellung soll nicht nur preisgünstig sein, sondern auch das Entfernen der nach dem Ausschalen des erstbetonierten Bauteiles nicht mehr benötigten Vorrichtung soll rasch und mühelos erfolgen können.The invention has for its object to provide an embodiment of the type of shuttering device described above, which retains the advantages of the previously known embodiments without their disadvantages. The manufacture should not only be inexpensive, but should also be able to remove the device which is no longer required after the formwork of the first concrete component has been removed.

Die Aufgabe wird durch die Merkmale der Kennzeichnung des Patentanspruchs 1 gelöst.The object is achieved by the features of the characterizing part of patent claim 1.

Als Einbettungsmasse werden mit Vorteil Gemische auf Silikat-Basis verwendet, wie z. B. Gips-Sägemehlgemisch oder Schaumbeton, dessen erwünschte Eigenschaften durch Zusatzmittel, wie z. B. Bentonit, breit steuerbar sind. Auch läßt sich die Haftung der Einbettungsmasse am Bauteilbeton durch einen Trennmittelanstrich, wie z. B. Weißkalk, leicht vermeiden. Zum Freilegen der Anschlußeisen genügt es, nach dem Ausschalen das aus thermoplastischem Kunststoff gebildete Verwahrungselement abzureißen und die Endabschnitte der Verbindungsstäbe mit wenigen Hammerschlägen von der spröden Einbettungsmasse zu befreien.Mixtures based on silicate, such as e.g. B. gypsum sawdust mixture or foam concrete, the desired properties of additives such. B. bentonite, are widely controllable. The adhesion of the embedding compound to the component concrete can also be coated with a release agent, such as. B. White lime, avoid easily. To expose the connecting iron, it is sufficient to tear off the storage element made of thermoplastic plastic after stripping and to free the end sections of the connecting rods from the brittle embedding compound with a few hammer blows.

Um das Herausfallen der Verbindungsstäbe und der Einbettungsmasse aus der Grundschalung zu verhindern, ist es empfehlenswert, Mulden mit schwalbenschwanzförmigem Querschnitt vorzusehen, oder auf die Grundschale quer über die Mulden flache Sicherungsstreifen lösbar zu befestigen.In order to prevent the connecting rods and the embedding compound from falling out of the basic formwork, it is recommended to provide troughs with a dovetail cross section, or to detachably fasten flat securing strips across the troughs to the basic shell.

In einer bevorzugten Ausführungsform ist vorgesehen, daß an den die Mulden begrenzenden Längsrändern der Grundschale Erhebungen ausgebildet sind, welche an die konvexe Seite der aus den Mulden herausragenden Biegungsabschnitte der Verbindungsstäbe angrenzen. Dadurch gelingt es, die Vorrichtung so dünn und damit auch so leicht wie möglich zu halten, zugleich aber auch zu erreichen, daß auf der konvexen Seite der Biegungsabschnitte kein Beton liegt, welcher deren Zurückbiegen behindern würde.In a preferred embodiment it is provided that elevations are formed on the longitudinal edges of the base shell delimiting the troughs, which elevations adjoin the convex side of the bending sections of the connecting rods protruding from the troughs. This makes it possible to keep the device as thin and thus as light as possible, but at the same time to achieve that there is no concrete on the convex side of the bending sections which would hinder their bending back.

Zudem kann vorgesehen sein, die von der Einbettungsmasse abgewandte Seite der Sicherungsstreifen und/oder die freie Oberfläche der Einbettungsmasse mit einem aus einem Zementabbindeverzögerer bestehenden Überzug zu versehen. Durch Wegspritzen der nicht abgebundenen Oberflächenschichtteile mit Wasser ergeben sich dann am erstbetonierten Bauteil rauhe Oberflächen, die einen guten Verbund in der später entstehenden Arbeitsfuge begünstigen.In addition, it can be provided that the side of the securing strips facing away from the embedding compound and / or the free surface of the embedding compound is provided with a coating consisting of a cement setting retarder. By spraying the not abge bonded surface layer parts with water then result in rough surfaces on the first concrete component, which favors a good bond in the construction joint that will be created later.

Die Erfindung wird nachfolgend anhand der Zeichnung beispielsweise erläutert. Es zeigt

  • Fig. 1 eine schematische Draufsicht auf eine Ausführungsform der erfindungsgemäßen Abschalungsvorrichtung, in welcher die einen Endabschnitte und größtenteils auch die Biegungsabschnitte von acht Verbindungsstäben untergebracht sind,
  • Fig. eine perspektivische Ansicht der zu dieser Vorrichtung gehörenden Grundschale,
  • Fig. einen Querschnitt nach der Linie III-III der Fig. 1 und
  • Fig. 4 einen Teilquerschnitt einer Ausführungsvariante der Grundschale.
The invention is explained below with reference to the drawing, for example. It shows
  • 1 is a schematic plan view of an embodiment of the formwork device according to the invention, in which the one end sections and for the most part also the bending sections of eight connecting rods are accommodated,
  • 1 shows a perspective view of the base shell belonging to this device,
  • Fig. A cross section along the line III-III of Fig. 1 and
  • Fig. 4 shows a partial cross section of a variant of the base shell.

Die hier beschriebene Abschalungsvorrichtung wird in eine Schalung 1, welche für einen Betonbauteil 2 bestimmt ist, eingesetzt und dient zur Aufnahme von Endabschnitten 3b der mit ihrem U-förmigen Teil 3a in diesem Betonbauteil 2 zu verankernden Verbindungsstäbe 3. Sie hat eine z. B. durch Nägel 4 an der Schalung 1 zu befestigende, in Draufsicht schmale rechteckige Grundschale 5, in der die erwähnten, zum Anschluß eines später anzuschließenden Betonbauteiles herauszubiegenden, im vorliegenden Ausführungsbeispiel geradlinigen Endabschnitte 3b der Verbindungsstäbe 3 gemäß der Darstellung in Fig. 1 und 3 eingesetzt sind, und zwar paarweise in zwei Reihen derart, daß sie sich in jeder Reihe überlappen, wozu die eingesetzten Endabschnitte 3b jedes Paares in einem spitzen Winkel zueinander angeordnet sind.The formwork device described here is used in a formwork 1, which is intended for a concrete component 2, and is used to receive end sections 3b of the connecting rods 3 to be anchored in this concrete component 2 with their U-shaped part 3a. B. to be fastened by nails 4 to the formwork 1, in plan view narrow rectangular base shell 5, in which the mentioned, to be connected for connecting a concrete component to be connected later, in the present exemplary embodiment straight end sections 3b of the connecting rods 3 as shown in FIGS. 1 and 3 are inserted, in pairs in two rows such that they overlap in each row, for which purpose the inserted end sections 3b of each pair are arranged at an acute angle to one another.

Wie aus Fig. 1 zu ersehen ist, sind die Endabschnitte von sechs der acht Verbindungsstäbe nach links gerichtet, diejenigen der zwei Verbindungsstäbe, die beim linksseitigen Ende dieser Fig. 1 dargestellt sind, nach rechts gerichtet, wobei sie einige der nach links gerichteten Endabschnitte überlagern. Durch diese Anordnung ergibt sich eine volle Ausnützung der Länge des Verwahrungselementes 5. Sämtliche Endabschnitte 3b sind durch Biegungsabschnitte 3c etwa rechtwinklig an die zum Verankern im Betonbauteil 2 bestimmten Verankerungsabschnitte 3a angeschlossen.As can be seen from Fig. 1, the end portions of six of the eight tie rods are directed to the left, those of the two tie rods shown at the left end of this Fig. 1 are directed to the right, overlapping some of the left end portions . This arrangement results in a full utilization of the length of the storage element 5. All end sections 3b are connected at right angles to the anchoring sections 3a intended for anchoring in the concrete component 2 by means of bending sections 3c.

Die oben beschriebene Anordnung der Endabschnitte 3b bestimmt weitgehend die Form von zwei Reihen von Mulden 6, die in der Grundschale 5 ausgebildet sind.The arrangement of the end sections 3b described above largely determines the shape of two rows of troughs 6 which are formed in the base shell 5.

Diese besteht hauptsächlich aus einem dünnwandigen, aus thermoplastischem Kunststoff, wie z. B. Polystyrol, z. B. im Preß- oder Tiefziehverfahren gebildeten Formteil, der zu einer seiner Seiten hin, die zum Anlegen auf den erst zu betonierenden Bauteil bestimmt ist, offene Mulden 6 aufweist, aus welchen die Verankerungsteile 3a vorstehen. Diese die Endabschnitte 3b aufnehmenden Mulden 6 sind im übrigen mit einer Einbettungsmasse 7 gefüllt, die beim Einbringen teigig war, aber im erhärteten Zustand spröde ist, und weder an den Verbin - dungsstäben noch auf dem Kunststofformteil haftet, damit sie nachfolgend - wie unten beschrieben - leicht entfernt werden kann. Als Einbettungsmasse eignen sich z. B. Gemische auf Silikatbasis, wie Gips-Sägemehl oder Schaumbeton; es kann, wie schon erwähnt, Bentonit oder anderes Zusatzmittel beigemischt sein. Im fertigen Zustand bildet die Vorrichtung eine steife, formbeständige Baueinheit, die leicht transportiert, gehandhabt und an einer Schalung 1 befestigt werden kann. Das Element 5 ist in seinen Längsrandbereichen mit Nageldurchlaßlöchern 9 versehen.This consists mainly of a thin-walled, thermoplastic material such as. B. polystyrene, e.g. B. formed in the pressing or deep-drawing process, which has open troughs 6, from which the anchoring parts 3a protrude to one of its sides, which is intended to be placed on the component to be concreted. These troughs 6 receiving the end sections 3b are otherwise filled with an embedding compound 7 which was doughy when introduced, but is brittle in the hardened state and does not adhere to the connecting rods or to the molded plastic part, so that it subsequently - as described below - can be easily removed. As an embedding compound, z. B. mixtures based on silicate, such as gypsum sawdust or foam concrete; As already mentioned, bentonite or other additives can be added. In the finished state, the device forms a rigid, dimensionally stable structural unit which can be easily transported, handled and attached to a formwork 1. The element 5 is provided with nail passage holes 9 in its longitudinal edge regions.

An der Grundschale 5 liegt eine rundherum verlaufende Mantelwand 5b vor, an welche die die Flachseite 5a bildende Deckwand anschließt. In dieser sind Erhebungen 5c, 5d ausgebildet, deren einer Wandungsteil - wie aus Fig.2 2 ersichtlich - in der Fortsetzung eines gekrümmten Muldenwandungsteiles liegt und mit diesem zusammen an die konvexe Seite der aus den Mulden 6 herausragenden Biegungsabschnitte 3c der Verbindungsstäbe 3 angrenzt. Damit wird erreicht, daß im Beton des Bauteiles 2 hinter den Biegungsabschnitten 3c Hohlräume gebildet werden und so das spätere Zurückbiegen dieser Abschnitte praktisch nicht behindert wird.On the base shell 5 there is an all-round jacket wall 5b, to which the top wall forming the flat side 5a adjoins. Elevations 5c, 5d are formed in the latter, one wall part of which - as can be seen in FIG. 2 - lies in the continuation of a curved trough wall part and adjoins the convex side of the bending sections 3c of the connecting rods 3 protruding from the troughs 6. It is thereby achieved that cavities are formed in the concrete of the component 2 behind the bending sections 3c and so that the later bending back of these sections is practically not hindered.

Die Mulden 6 haben nach der Darstetfüng in Fig. 3 einen sich vom Boden zur Flachseite 5a schwach erweiterten Querschnitt, was das Ausformen der Grundschale 5 bei deren Herstellung erleichtert. Da wegen der fehlenden Haftung der Einbettungsmasse 7 an der Grundschalung 5 die Gefahr bestände, daß sie samt den Verbindungsstäben 3 aus den Mulden 6 herausfallen könnte, sind flache, z. B. aus Polystyrol bestehende, sich quer über die Mulden 6 erstreckende, im Bereich derselben an die Einbettungsmasse 7 anliegende Sicherungsstreifen 8 an der die Flachseite 5a bildenden Wand der Grundschaltung 5 lösbar befestigt, z. B. durch Punktschweißung, Klebeverbindung oder mittels Nieten, Bolzen od. dgl.According to the illustration in FIG. 3, the troughs 6 have a cross section which is slightly widened from the bottom to the flat side 5a, which facilitates the shaping of the base shell 5 during its manufacture. Because of the lack of adhesion of the embedding compound 7 to the basic formwork 5, there was a risk that it, together with the connecting rods 3, could fall out of the depressions 6, flat, e.g. B. made of polystyrene, extending across the troughs 6, in the same area to the embedding compound 7 securing strips 8 releasably attached to the wall 5a of the basic circuit 5 forming the flat side, z. B. by spot welding, adhesive connection or by means of rivets, bolts or the like.

In einer Ausführungsvariante, die in Fig.4 veranschaulicht ist, könnten die Mulden 6 einen sich zur Flachseite hin verengenden, z. B. trapezförmigen Querschnitt haben, damit in ihnen die Einbettungsmasse 7 formschlüssig gehalten ist. Bei solcher Gestaltung kann auf Sicherungsstreifen 8 verzichtet werden.In one embodiment variant, which is illustrated in FIG. 4, the troughs 6 could constrict towards the flat side, e.g. B. have a trapezoidal cross-section so that the embedding compound 7 is held in a form-fitting manner in them. With such a design, security strips 8 can be dispensed with.

Die Haftung der Einbettungsmasse 7 am Bauteil 2 kann durch einen Anstrich der freien Oberfläche dieser Masse mit einem Trennmittel, wie z. B. Weißkalk, vermieden werden.The adhesion of the embedding compound 7 to component 2 can be achieved by painting the free surface of this compound with a release agent, such as. B. white lime can be avoided.

Die von der Einbettungsmasse 7 abgewandte Seite der Sicherungsstreifen 8 kann eine Profilierung, z. B. eine Rillung, besitzen, damit die daran entstehenden Flächenteile des Bauteiles 2 eine entsprechende Profilierung erhalten, was zur Aufrauhung der nachfolgend erhaltenen Arbeitsfuge beiträgt.The side of the securing strip 8 facing away from the embedding compound 7 can be profiled, e.g. B. have a grooving, so that the resulting surface parts of the component 2 receive a corresponding profile, which contributes to the roughening of the subsequently obtained construction joint.

Zum gleichen Zwecke kann diese Seite und/oder die freie Oberfläche der Einbettungsmasse mit einem aus einem Zementabbindeverzögerer bestehenden Überzug versehen werden; die unfertig abgebundenen Oberflächenschichtteile am Bauwerk 2 können dann nach Wegnahme der Vorrichtung mit Wasser abgespritzt werden.This side and / or the free surface of the embedding can be used for the same purpose be provided with a coating consisting of a cement setting retarder; the unfinished surface layer parts on the structure 2 can then be sprayed with water after removal of the device.

Nach Wegnahme der Schalung 1 und der Grundplatte 5 ist die spröde Einbettungsmasse 7 zu entfernen, was durch Verabfolgung einiger weniger Hammerschläge auf die Endabschnitte 3b der Verbindungsstäbe 3 erfolgen kann. Vor oder nach dem Herausbiegen dieser Endabschnitte 3b in die geradlinige Fortsetzung der Schenkel des verankerten Abschnittes 3a sind auch noch die allfällig verwendeten Sicherungsstreifen 8 wegzunehmen.After the formwork 1 and the base plate 5 have been removed, the brittle embedding compound 7 is to be removed, which can be done by administering a few hammer blows on the end sections 3b of the connecting rods 3. Before or after the bending out of these end sections 3b into the straight continuation of the legs of the anchored section 3a, the securing strips 8 which may be used must also be removed.

Die Vorrichtung findet eine breite Verwendung bei der Herstellung von Arbeitsfugen in Stahlbetonbauwerken irgendwelcher Art, z. B. beim Anschließen von Zwischenwänden, Stufen, Lichtschächten, Zwischenböden, Silodecken usw., z. B. an einer Hauptwand.The device is widely used in the production of construction joints in reinforced concrete structures of any kind, e.g. B. when connecting partitions, steps, light wells, intermediate floors, silo ceilings, etc., z. B. on a main wall.

Claims (6)

1. Shuttering-off device which, in the production of two structural members to be concreted with a time lag, is fastened to the shuttering (1) of the structural member (2) to be concreted first, having a narrow, rectangular base pan (5) as viewed in plan, and having connection bars (3) whose one end sections (3b), which are bent off from the other end sections (3a) approximately at right angles, are inserted in the base pan (5), characterized in that the base pan (5) consists mainly of a thin-walled mould part formed of synthetic material which, towards one of its sides intended to be applied to the structural member (2) to be concreted first, has open troughs (6) receiving the one end sections (3b), which troughs are filled up with an embedding mass (7) which is brittle in the hardened state and adheres neither to the one end sections (3b) nor to the base pan (5), the device as a whole forming a rigid structural unit of permanent shape.
2. Device according to claim 1, characterized in that on the longitudinal edges of the base pan (5) bounding the troughs (6), elevations (5c, 5d) are formed which butt against the convex side of the bending sections (3c) of the connection bars (3) projecting from the troughs (6).
3. Device according to claim 1 or 2, characterized in that the troughs (6) have a cross-sectional shape narrowing towards the open side thereof (Fig. 4).
4. Device according to claim 1 or 2, characterized in that flat safety strips (8) are detachably fastened to the base pan (5), which strips extend over across the troughs (6) and rest in the region thereof against the embedding mass (7).
5. Device according to claim 4, characterized in that the side of the safety strips (8) facing away from the embedding mass (7) exhibits a profiling.
6. Device according to claim 4, characterized in that the side of the safety strips (8) facing away from the embedding mass (7) and/or the free surface of the embedding mass (7) is provided with a coating consisting of a cement setting retarder.
EP79810113A 1979-10-03 1979-10-03 Construction joint shuttering comprising a former for supporting connecting bars Expired EP0026803B1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
AT79810113T ATE2155T1 (en) 1979-10-03 1979-10-03 FORMWORK DEVICE WITH A BASE SHELL AND WITH CONNECTING RODS.
DE7979810113T DE2964428D1 (en) 1979-10-03 1979-10-03 Construction joint shuttering comprising a former for supporting connecting bars
EP79810113A EP0026803B1 (en) 1979-10-03 1979-10-03 Construction joint shuttering comprising a former for supporting connecting bars
AU63367/80A AU535851B2 (en) 1979-10-03 1980-10-02 Lining device for connection irons of concrete construction parts
PCT/CH1980/000121 WO1981001025A1 (en) 1979-10-03 1980-10-02 Lining device for connection irons of concrete construction parts
CA000361406A CA1144774A (en) 1979-10-03 1980-10-02 Receptacle for reinforcing bars
JP50217580A JPS56501253A (en) 1979-10-03 1980-10-02
US06/269,048 US4419852A (en) 1979-10-03 1980-10-02 Device for preserving connecting bars for concrete structural members
HK518/86A HK51886A (en) 1979-10-03 1986-07-03 Construction joint shuttering comprising a former for supporting connecting bars
MY429/86A MY8600429A (en) 1979-10-03 1986-12-30 Shuttering-off device with a base pan and with connection bars

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP79810113A EP0026803B1 (en) 1979-10-03 1979-10-03 Construction joint shuttering comprising a former for supporting connecting bars

Publications (2)

Publication Number Publication Date
EP0026803A1 EP0026803A1 (en) 1981-04-15
EP0026803B1 true EP0026803B1 (en) 1982-12-29

Family

ID=8186534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79810113A Expired EP0026803B1 (en) 1979-10-03 1979-10-03 Construction joint shuttering comprising a former for supporting connecting bars

Country Status (9)

Country Link
US (1) US4419852A (en)
EP (1) EP0026803B1 (en)
JP (1) JPS56501253A (en)
AT (1) ATE2155T1 (en)
CA (1) CA1144774A (en)
DE (1) DE2964428D1 (en)
HK (1) HK51886A (en)
MY (1) MY8600429A (en)
WO (1) WO1981001025A1 (en)

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Publication number Priority date Publication date Assignee Title
FI62888C (en) * 1981-12-15 1983-03-10 Rake Oy FOERTILLVERKAT BETONGARMERINGSELEMENT OCH FOERFARANDE VID TILLVERKNING AV ARMERINGSANSLUTNINGAR
DE3273030D1 (en) * 1982-09-10 1986-10-09 Pawe Ag Reinforcement-iron holder for use in joining cast concrete work and method of manufacturing the same
FI824194L (en) * 1982-12-07 1984-06-08 Rake Oy FOERTILLVERKAT BETONGARMERINGSELEMENT.
AT376267B (en) * 1982-12-13 1984-10-25 Avi Alpenlaendische Vered CONNECTING PART FOR TWO STEEL CONCRETE ELEMENTS
FR2554483B1 (en) * 1983-11-09 1988-06-17 Moreau Pierre REINFORCEMENT POSITIONING BOX
FR2560913B1 (en) * 1984-03-09 1986-10-24 Quille Entreprise DEVICE FOR MAINTAINING ON A FORMWORK ELEMENT A GRAVING FUR AND A PENDING IRON SUPPORT
ATE35437T1 (en) * 1984-06-21 1988-07-15 Pebea Nv REINFORCEMENT HOLDER FOR USE IN CONCRETING CONCRETE.
FR2592418A1 (en) * 1986-01-02 1987-07-03 Mure Ets Method for indenting reinforcement elements for the connection between two parts of a concrete structure and device for the implementation thereof
DE3672797D1 (en) * 1986-01-15 1990-08-23 Pebea Nv ARMORING IRON HOLDER FOR USE IN CONNECTING CONCRETE.
FR2615226B1 (en) * 1987-05-15 1993-03-12 Habermann Pierre NEGATIVE FORMWORK DEVICE INCLUDING AT LEAST ONE FLEXIBLE WALL ELEMENT FOR LAYING CORNER READERS, OR THE LIKE
DE8717062U1 (en) * 1987-12-29 1988-04-07 Max Frank GmbH & Co KG, 8448 Leiblfing Device for insertion into a formwork for a concrete component
FR2656891B2 (en) * 1988-11-18 1992-08-07 Gozard Jean CONCRETE RECOVERY PROFILE.
US4984401A (en) * 1989-07-31 1991-01-15 Dayton Superior Corporation Device and method for housing a steel reinforcement in an area where joints are made between first and subsequently poured concrete structures
DE9113086U1 (en) * 1991-10-21 1992-04-30 Betomax Kunststoff- und Metallwarenfabrik GmbH, 4040 Neuss Storage device for reinforcing bars to be anchored in a concrete wall
FR2686360B1 (en) * 1992-01-22 1994-10-21 Pierrino Vadala TOOL FOR INCORPORATING REINFORCEMENT INTO A CONCRETE STRUCTURE.
FR2710091A1 (en) * 1993-09-16 1995-03-24 Sauveplane Pierre Device for placing and positioning reinforcement bars in formwork (shuttering) for reinforced concrete
IL162417A (en) * 2004-06-09 2013-05-30 Doma Marketing For Building & Trading 1996 Ltd Reinforcement bar box for concrete structures
WO2008052243A1 (en) * 2006-11-02 2008-05-08 Sugar Steel Engineering Pty Ltd Void former
DE202007011243U1 (en) * 2007-08-10 2007-10-25 Philipp Gmbh Holder for rope loops
FR2980808B1 (en) * 2011-10-04 2013-10-04 Herve Auney PLASTIC MONOBLOCK HOLDING UNIT AND DEVICE OBTAINED WITH SUCH A HOUSING

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US1715743A (en) * 1928-02-17 1929-06-04 James J Duggan Furring construction
US1742883A (en) * 1928-02-29 1930-01-07 Frederick M Venzie Building structure
US1798134A (en) * 1928-08-23 1931-03-31 Daniel B Danielson Veneer bond
GB884553A (en) * 1957-03-11 1961-12-13 Rheinbau Gmbh Improvements in or relating to concrete ceiling or floor structures
DE2307073C2 (en) * 1973-02-14 1974-11-14 Hochtief Ag Fuer Hoch- Und Tiefbauten Vorm. Gebr. Helfmann, 4300 Essen Device for storing wall connection iron
CH562376A5 (en) * 1974-02-27 1975-05-30 Brechbuehler Fritz

Also Published As

Publication number Publication date
ATE2155T1 (en) 1983-01-15
MY8600429A (en) 1986-12-31
WO1981001025A1 (en) 1981-04-16
HK51886A (en) 1986-07-11
CA1144774A (en) 1983-04-19
US4419852A (en) 1983-12-13
EP0026803A1 (en) 1981-04-15
DE2964428D1 (en) 1983-02-03
JPS56501253A (en) 1981-09-03

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