DE29909716U1 - Concrete component made of plastic - Google Patents

Description

S ·

Dipl.-lng. A. Wasmeier

Dipl.-lng. H. Graf

Authorized before the European Patent Office + Trade Mark Office · Professional Representatives before the European Patent Office + Trade Mark Office

Patent Attorneys PO Box 10 08 26 93008 Regensburg

German Patent Office
and Trademark Office
Zweibrückenstr. 12

80297 Munich

D-93008 REGENSBURG P.O. BOX 10 08 26

D-93055 REGENSBURG GREFLINGERSTRASSE 7

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(0941)79 20 (0941)79 20 (0941)79 5106 wasmeier-graf (5>t-online.de

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H/g 18.908a

Date
Date

02 June 1999 gr-ra

Applicant:

H. hiendl GmbH & Co. KG Industriestrasse 5 + 6 94327 Bogen-Furth

Title:

Concrete component made of plastic

Accounts: HypoVereinsbank (Bl*Z,75(J2ßp 73).}£39,300 ..· Postgiroamt München (BLZ 700 100 80) 893 69-801 OeriCfrtSstand Regensburg A18908.DOC

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Concrete component made of plastic

The innovation relates to a concrete component according to the generic term of protection claim 1.

"Concrete installation element" in the sense of the invention is an element which is generally embedded in the concrete used in the manufacture of concrete components. Such concrete installation elements are used in concrete construction in a wide variety of forms and for a wide variety of purposes, for example as spacers to ensure a predetermined distance between structural steels of a reinforcement, between formwork walls, etc.

The aim of the innovation is to demonstrate a concrete installation element that can be manufactured inexpensively from plastic and ensures permanent anchoring in the concrete.

To solve this problem, a concrete installation element is designed according to claim 1.

The new concrete installation element can be manufactured inexpensively, especially when PET reclaimed from PET drinks bottles that are no longer usable is used for production. Furthermore, the new installation element has a reduced coefficient of thermal expansion with sufficiently high elasticity, so that even large temperature fluctuations in the finished concrete component do not lead to the concrete detaching from the surfaces of the embedded installation element and thus to leaks.

Further developments of the innovation are the subject of the dependent claims.

The innovation is explained in more detail below using exemplary embodiments in the figures. They show:

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Fig. 1 shows a simplified partial view of a section through a concrete formwork, together with a first possible embodiment of the concrete insert according to the invention;

Fig. 2 is a view similar to Figure 1 of a further embodiment of the innovation.

The formwork shown in Figure 1 and generally designated 1 therein is used to manufacture components, in particular walls made of concrete. The formwork consists of the two formwork walls 2 which delimit the formwork interior, which are held at the distance required for the desired wall thickness by means of several spacers 3, one of which is shown schematically in the figure, and are clamped against each other by means of clamping bolts 4 with clamping elements 5.

In the embodiment shown, the spacer 3 is tubular, i.e. it consists of a tubular profile. The latter is made of a plastic material which consists of at least one plastic from the group PET, PEN or polyimide.

The manufacture of the spacer from PET, PEN or polyimide has the advantage, among other things, that it can be manufactured in a particularly simple manner, for example by extrusion. Furthermore, the manufacture of the spacer from the aforementioned material has the advantage that this material has a significantly reduced coefficient of thermal expansion compared to other inexpensive plastics. Thermal changes in the spacer 3 relative to the surrounding concrete 6 caused by temperature changes are thus significantly reduced, whereby a permanent, in particular also tight embedding of the spacer 3 in the surrounding concrete 6 is achieved, so that above all in the finished concrete wall a water- or moisture-tight seal is ensured between the concrete 6 and the spacers 3, the openings or channels of which after demolding and removal of the clamping bolts

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from these channels in the usual way by plugs or other means. Another advantage is that PET in particular is available inexpensively in large quantities as regenerated material from PET bottles that are no longer usable.

In order to better embed the spacer 3 in the concrete, the latter is spaced on its outer surface, ie provided with a layer 7 consisting of sand or sand bodies which are held in a suitable manner, for example by an adhesive, on the outer surface of the spacer 3.

Figure 2 shows a spacer 3a in a similar representation to Figure 1, which differs from the spacer 3 essentially in that the spacer 3a forms a flange 8 at each of its two ends, with which the spacer rests against the inner surface of the formwork wall 2 in question. Furthermore, a further flange 9 is provided at a distance from the flange 8. The flanges 9 protrude far beyond the peripheral surface of the spacer 3a. A smaller, ring-like flange 10 is provided between each flange 8 and the adjacent flange 9. Two further ring-like projections or beads are located between the flanges 9. The spacer 3a also has several webs 12 extending in the longitudinal direction and projecting beyond the outer surface of the spacer 3a, which also additionally connect the flanges 8, 9, 10 and the ring-like projections 11.

The spacer 3a is manufactured by molding from a plastic from the group PET, PEN or polyimide. The spacer 3a is also provided with the coating 7 on its outer surface, for example. The profiling described above improves the embedding in the concrete as well as the sealing against moisture and water on the circumference of the spacer.

The innovation has been explained in more detail above using exemplary embodiments. It goes without saying that numerous changes and modifications are possible without thereby departing from the inventive concept underlying the innovation.

List of reference symbols

3, 3a

Concrete formwork Formwork wall Spacer or wall thickness Clamping bolt Clamping element or nut threaded piece Concrete

layer

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Claims (5)

1. Concrete installation element made of plastic, for example spacers ( 3 ), characterized in that the installation element is made of at least one plastic material from the group PET, PEN, polyimide. 2. Installation element according to claim 1, characterized in that it is made from a PET regenerate, in particular from a PET bottle regenerate. 3. Concrete installation element according to claim 1 or 2, characterized in that it is produced by extrusion or by injection molding. 4. Concrete installation element according to one of the preceding claims, characterized in that it is profiled on its outer surface, for example by ribs or flanges projecting beyond the outer surface. 5. Concrete installation element according to one of the preceding claims, characterized in that it is provided on its outer surface with an adhesive coating, for example with a layer ( 7 ) of sand.