FI59283B - BETONGARMERAT URHOLKAT BYGGELEMENT OCH DESS TILLVERKNINGSFOERFARANDE - Google Patents

Description

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Patent · och raglateratyrelsen An «ök» n utltgd och utl.ikrift * n publtcerad 31.03.8l (32) (33) (31) Pyydutty «Tuoikaui —B« | lrd prlorltet (71) (72) Matti Tapani Denmark, Sjöviksvägen 6 , 10600 Ekenäs, Finland -Finland (Fl) (7 ^) Keijo Heinonen (5I +) Concrete-reinforced lightweight building element and its manufacturing method - Betongarmerat urholkat byggelement och dess tillverk-ningsförfarande

The invention relates to a method of manufacturing a lightened building element, for example a lower, upper tile element, and to elements made according to the method.

Previously known concrete cast reinforced, building it lement it are unreasonably heavy if they are closed. Lightweight slab elements are also made with cavities. The cavities are formed, for example, by a casting machine which leaves the desired cavities in a very rigid mass in the cast element. The cavities are also formed by, for example, light gravel, which is poured out of the cavities after casting. The cavities can also be provided, for example, by means of pipes. The disadvantages of the countries' methods are the high cost and the complexity of the machines used in the manufacturing technology. In addition, the technology used in these does not allow -2- 59283 to make very large cavities and thus tiles as spring as possible. However, it is also known to do this. using the cavities in the casting work and thus in the structure of the slab at least to some extent with load-bearing gutters.

German application publication No. 2422192 discloses a slab which is intended to be made for light transport using a hollow structure which is filled at the installation site. The hollow profile is rigid in part to stiffen the slab element.

German application publication No. 1920414 discloses a lightened slab element in which, for example, rigid box-like troughs are used to form the cavities or lighter pieces of concrete are used inside the slab to lighten the slab.

German Offenlegungsschrift No. 125432Θ discloses a cavity element in which trough gutters are used to provide the cavities.

The object of the invention is to provide a cavity element in a simpler and cheaper way than described above and thus to promote development in the production of slab elements.

The elements set out in the characterizing part of claim 1 and claim 2 are essential for the concrete-reinforced building element slurry according to the invention and its production method.

The invention will be explained in more detail in connection with the accompanying figures.

Figure 1 shows a cross-section of an end view of a cavity beam in which the cavities are formed in some way according to the invention.

Figure 2 clarifies how the cavity is obtained, for example, using a plastic film and Figure 3, respectively, using corrugated cardboard.

Figure 1 shows a concrete casting beam 1, inside which elongate cavities 4 have been created by means of cavity gutters. reinforcement as required. Finally, the element is cast to its full thickness. In this way, cavity elements of the desired structure are obtained in a very simple manner. Namely, the cavity can be made different in size, shape and quantity according to the intended use. As easily as the building elements according to Figure 1 are made, elements can be made in which the cavity has, for example, two layers. On top of the structure according to Figure 1, the production of the element is continued by installing new gutter elements either identical or different and then the top layer is cast. The structure of the load-bearing slab element must, of course, take into account the structure of the concrete parts generated in the slab.

In Figure 2, the plastic film is fastened to the trough 2a by means of tensioned tendon wires 5. At the upper corners of the trough, the film turns from the tendon wires 5 into the side walls of the trough and forms a channel 6 for the tendon wires 5 at its lower edges.

Figure 3 shows how the corrugated board can be tied into a trough 2b by means of tension wires 5. From the top, the corrugated board is bent over the tendon wires 5 as in the previous case. The lower edge of the corrugated board can be supported on the tendon wire by branching the lower edge of the corrugated board into a downwardly branching groove.

Stiffening of the film, corrugated board or other similar non-load-bearing material in the form of a trough is achieved, for example, by tensioned steel wires mounted inside and / or outside it, by threading the steel wires inside the film or in folds or by tying the film edges to the steel wires.

As can be seen from the above description, the construction of the building elements according to the invention is simple and inexpensive.

Depending on the conditions of use, the structure of the element can be changed in the manner best considered in each case within the scope of the claims. Although the term gutter or gutter element is used in the description and claims, here it also refers to box-like structures and not to actual gutters with open ends alone.

Claims (4)

4,5983 A reinforced, lightweight building element, the lightening of which is formed by cavities (4) inside the element, characterized in that the cavities (4) of the element consist of plastic film, corrugated cardboard or similar non-load-bearing material bonded to the trough (2) by stiffening wires (5). and attached to a mold or reinforcement as needed. A method of manufacturing a building element according to claim 1, characterized in that a concrete layer of the lower surface (3) of the element is applied to the mold substrate, a plastic film, corrugated cardboard or other similar non-load-bearing material is laid on top of the trough stiffening wires (5) mold or reinforcement, after which the element is cast to full thickness. Manufacturing method according to Claim 2, characterized in that the plastic film, corrugated cardboard or similar material {2a, '2b) is bent into a trough by means of tensioned stiffening wires (5) mounted inside and / or outside, by threading the stiffening wires inside the film (6) or folds ( 7) or by binding in another known manner. Manufacturing method according to Claim 2 or 3, characterized in that new gutters (2) are installed on top of the concrete mass poured on the first cavity layer, on top of which the concrete mass is poured to the desired strength. > N