DE7217551U - RECESS PROFILES FOR CONCRETE CONSTRUCTION - Google Patents

Description

Produkta GmbH
73 Esslingen / N
Middle Beutau 39

Utility model registration

Recess profiles for concrete construction

In the manufacture of slab-shaped concrete elements, in particular of concrete walls, concrete ceilings, concrete parapets and concrete beams, it is often necessary to make recesses in these slabs. It is irrelevant whether these concrete components are produced on site and be poured, or whether it concerns prefabricated parts that factory-made and only later brought to their final place of use.

A special type of recesses is characterized in that Profiles of certain types of cross-section with relatively large linear expansion must be introduced into such concrete components that will be removed later. This is the case, for example, when the sharp Chamfered the edge of a concrete slab, a support or an alkene shall be. Such profiles are also required if e.g. Sills of water on window sills, balcony slabs, etc. are required. Such profiles are also used when making concrete walls in two sections to be poured. Here, a triangular or trapezoidal joint is provided in the first concrete component, in which may also protrude connecting irons. In the second During the construction phase, a second concrete wall is then butted against the concrete wall poured in the first section, and here it is required that a good bond between the old and the new Concrete is created. The concrete poured in the second section then penetrates the intended joint and creates the desired bond. In the case of precast concrete parts, it can also happen that two later Merger provided components such leads on both Sides of the joint are provided, then mostly reinforcing iron from both prefabricated parts reach into the joint. The <£ urch the The cavity formed in the two joint recesses is then later covered with concrete encapsulated and so a force-fit connection between the two Concrete components causes.

Wood strips or other profiles made of wood are mainly used to produce such recesses. In the case of small triangular profiles are these in the shelf triangular strips, which are nailed to the formwork. For making "dovetail" connections Similar bodies are formed in concrete walls that were initially concreted for later concreting of a second wall Nailing several boards together, which are then attached to the wall formwork in the intended place. During prefabrication in the concrete plant such rioIzausnehmungen on the edge formwork are also the molding tables used.

It is characteristic of all these recesses that they are usually can only be used once. The wood can hardly be removed non-destructively from the hardened concrete and usually after the first Insert no longer reusable.

According to the proposal, these profile strips are only used once xi no longer made of wood, but made of foam bodies.

It is well known that e.g. water nose profiles are already out Plastic are made, preferably from polyvinyl chloride or made of polyethylene, which are manufactured in an extrusion process. Such Plastic profiles are expensive and therefore have to be used repeatedly certainly. In the BliOsi:? ^. £ n (brapcls- «xst but the multiple use questioned, Trotsrlles' HoSen ^ price, and finally

These extruded profiles also tend to become too waves and therefore often offer difficulties in proper attachment to the formwork.

Also the use of foams, especially polystyrene and foamed polyethylenes or polyurethanes for the production of recesses in concrete buildings are already known. So are used with ribbed and coffered ceilings !! hat-shaped or trapezoidal Foam bodies for the production of displacement spaces are used to “save weight in the concrete ceiling”. Also are zylisdertör ??! * Displacement body known for creating cavities in bridges and similar structures. The use of foam is also known when using facing formwork to give a concrete surface a desired structure.

It differs from the previously described areas of application the proposed use of foams for production in particular triangular shapes according to FIG. 2 of the negative type in Concrete in that it is used for chamfering concrete edges, for the formation of water noses and dovetail profiles in concrete walls Fig.l serve and should only be used once.

According to the proposal, the Schaunis fabric bodies are triangular or Trapezoidal shape according to Figure 2, preferably made of polystyrene foam higher than normal density, to achieve sufficient mechanical strength. It is also advisable not to run these profiles To saw or cut foamed blocks, because the open-pored or closed-pore material bodies are rough Surface were obtained that made stripping difficult, with Remnants of the foam can easily stick to the concrete whether .. you Proposed foam profiles are therefore preferably made with a smooth surface.

With regard to the storey heights, these profiles usually have a large linear expansion, depending on the height of the storey and the purpose of use, usually several meters long, with an edge length of a few Centimeters. This brings with it special transport problems for the parts at risk of breakage. It is therefore proposed, for transport and manufacturing reasons, to cut these profiles in lengths of e.g. 1.00m or 1.25m to produce, the joints of the profiles produced in this way according to FIG. 3 special devices for connecting in the Have longitudinal direction. This can be done according to the proposal by projections on one end face and recesses on the other end face of the Profiles are made, these projections and recesses being hemispherical frustoconical (Fig. 3) o.a. are designed so that a full Shock when applied to the formwork can be achieved, with de If necessary, the joint can still be secured by adhesives. This makes it possible to transport short pieces and still be able to move long Re joints made in the case of invisible or barely visible joints in the concrete will.

The sides facing the concrete can also have knobs or be provided with a corrugation in order to create depressions in the negative form of the concrete. This creates a larger composite area between old and new concrete achieved when concreting in different sections and thus a higher strength of the mechanical bond between old; and new concrete "

Claims (4)

Furthermore, it may be desirable to provide bores or holes in the foam recessing bodies in order, for example, to pass through later reinforcing iron. On the other hand, the relatively low mechanical strength of the foam body also allows reinforcing iron protruding from the concrete to be simply pushed through the foam body at joints. In a further variant, the side facing the formwork surface can be provided with a self-adhesive material in order to secure the fastening. In a further variant, according to FIG - or trapezoidal profiles, additional flags can be attached on one or both sides to make it easier to nail the profiles to the formwork 1) Profile for the production of joints or grooves in concrete components, with a triangular cross-section, trapezoidal cross-section or rounded cross-sections according to FIG. 2, the length of which is significantly greater than the cross-section of the profile, for the purpose of producing chamfers on the edges of concrete parts, for the formation of water streaks on concrete parts or for the dovetail connection of concrete parts gomäß Fig.l, characterized in that the profile is made of schäm- L teas plastic, vorz-ngsireiee at? Polystyrene, or polyethylene or 'consists of polyurethane = 2) Profile according to claim 1, characterized in that the surface of the profile facing the shell surface with self-adhesive materials is provided to facilitate its attachment to the formwork. 3) Profile according to the preceding claims, characterized in that according to FIG. K on one or both sides of the profile flags or projections are attached, which facilitate the nailing of the profile to the formwork surface. _7th 4) Profile according to the preceding claims, characterized in that that the profile in the Horstellungs- and delivery condition a lower Long than the length required for the application and that the Profj - can be compounded in length, with the purpose of being more dense Joint formation and better mechanical connection according to Fig. 3 a protrusion on each end face of the profile and a protrusion on the other Side, on the other hand, a recess is designed so that two or more Profiles can be plugged into one another. Protective sayings 1) Profile for the production of joints or grooves in concrete components, with a triangular cross-section, trapezoidal cross-section or the rounded cross-sections according to FIG. 2, the length of which is significantly greater than the cross-section of the profile, for the purpose of producing chamfers on the edges of concrete parts, for the formation of water pockets on concrete parts or for the dovetail connection of concrete parts according to FIG. 1, characterized in that the profile is made of ashamed Plastic, preferably made of polystyrene, polyethylene or polyurethane, 2) Profile according to claim 1, characterized in that the formwork surface facing "'pool of the profile is provided with self-adhesive material to facilitate its attachment to the formwork. 3) Profile according to the preceding claims, characterized in that according to Figure 4 on one or both sides of the profile flags or projections are attached, which facilitate the nailing of the profile to the formwork surface. J k) Profile according to the preceding claims, characterized in that the profile in the manufacturing and delivery state has a shorter length than the length required for the application and that the profile can be assembled in length, with the purpose of dense joint formation and better mechanical connection according to Fig .3 a projection on each end face of the profile, while a recess is formed on the other side so that two or more profiles can be plugged into one another ..