DE7702730U1 - Use and handling packaging for steel fibers - Google Patents

Description

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COHAU8Z & PLÖRACK PATENT TO WA LTS OFFICE SCMUMANNSTR. 07 D-40OO DÜ8BBLDOHF Tilelon, (0211) 68 33 44 Tel »ι 0858 6513 cop d

PATENT LAWYERS. Dlpl.-lng. W. COHAUSZ Dlpl.-lng. R, KNAUF · Dr.-lng ,, Dlpl.-Wlr1ich.-lng. A, GERBER ■ Dlpl.-lng. H. B. COHAUSZ

Thyssen Westfälische Union AG Wilhelmstrasse 2
4700 Hamm λ

Steel fiber bundle

It is state of the art to use steel fibers to reinforce concrete. So it was already in the year Proposed in 1927 by US Pat. No. 1,633,219, short lengths of wire to be used for the reinforcement of concrete.

From DT-OS 1 484 125 it is known to embed short pieces of reinforcement wire in concrete, the pieces of wire ) have a certain distance from each other.

The suggestion has also been made, shotcrete mixes (DT-PS 2 221 373) for the lining of shafts, underground routes and tunnels, in addition to the well-known aggregates gravel, Add sand, cement and, if necessary, plastic dispersions, steel fibers.

However, the use and handling of the steel fiber creates considerable difficulties. The steel fibers have in

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typical dimensions e.g. a diameter of 0.3 - T- * 2 mm, esp. 0.4-0.6 mm, with lengths from 10 to 50 mm, esp. um 20 mm.

Usually, the steel fibers are stored in sacks, boxes or drums in the cut state and are then "shipped" brought.

Due to the vibrations that occur when the containers are transported the cut fibers get into each other, whereby a considerable amount of work is required to untangle the fibers, to ensure continuous addition to the concrete mix. In many cases it will be evenly distributed the fiber sections in the concrete are not reached or only with a great deal of work. This is especially true for longer ones Steel fibers which, for example, have a length of more than 20 mm. It has been shown that the disentanglement of the during transport The resulting fiber ball does not always take place as a result of the mixing process in the concrete mixer. On the contrary, it becomes common increased lump formation beyond the normal level was observed.

The present invention is based on the object of developing a three-dimensional shape that is easy to use Steel fibers made possible, whereby the transport should be simple and the handling during the addition is also facilitated.

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The object is achieved according to the invention in that a large number of steel fibers aligned longitudinally are held in an aligned state by a jacket. The jacket can be given, for example, by a sheet-like material, for example made of paper or cardboard. Plastic films are particularly suitable as the jacket. Here, a coat can, for example, 1 kg

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Keep steel fibers aligned lengthways. If the individual steel fibers have a diameter of 0.4 mm and a length of 25 mm, they are then in a bundle several 1000 steel fibers.

Due to the jacket, the steel fibers are kept in the aligned state during transport up to the time of addition. When adding, there is the advantage that aligned fibers can be added to the concrete mix without the need for a lengthy detangling of the steel fibers beforehand. In order to facilitate the addition, the jacket can have a tear seam or a tear thread or a
Have weakened seam so that the steel fibers can be removed more easily.

Plastic foils have proven particularly useful as the jacket material. These plastic foils can easily be welded in such a way that they hold the steel fibers in the aligned state. It is even possible to arrange several steel fiber bundles one behind the other, with the
Welding point between the respective jackets forms the connection point between the individual bundles.

The invention is explained in more detail below with reference to FIGS. 1 and 2.

Show it:

1 shows an enlarged schematic representation;

Fig. 2 shows the object of FIG. 1 in a reduced size
Scale.

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The steel fiber bundle is denoted by 1 as a whole. It consists of longitudinally aligned steel fibers 2, a bundle I containing many 1000 steel fibers could be. These steel fibers 2 are aligned lengthways, i.e. they are parallel to one another and they end at the common imaginary end face 4. In this state, the steel fibers 2 are held by the jacket 3. the Sheath is preferably given by a plastic film.

According to FIG. 2, two steel fiber bundles 1 are one behind the other arranged, surrounded by the jacket j5, the end faces 4 of the jacket J5 are connected to one another via the bridge 5 and the bridge 5 is also through the jacket material, preferably through the welding point of the plastic film, given.

It is essential for the present invention that the unit jacket j5 and steel fiber 2 interact so that a Tangling or matting of the steel fibers between manufacture and use is prevented. The steel fibers must be kept in the longitudinally aligned state. This results in a tedious untangling of the steel fibers - as was necessary in the prior art - avoided from the start and there is a uniform distribution of the steel fibers possible in a short time. A considerable economic advantage is thus achieved by simple means; -

The arrangement of several fiber bundles one behind the other (FIG. 2) offers the advantage that packaging and transport are simplified will. The fiber bundles arranged one behind the other are also arranged one behind the other in transport containers, for example and surrounded by packaging material to keep them separate from other bundles during shipping. Through this

transport and removal are made easier.

It should also be noted that the present invention has the advantage that the amount of Steel fibers can be determined from the outset, since the weight of the steel fiber bundle is fixed. Thus, in easier Way the correct weight percentage of concrete / steel fiber can be determined at the construction site.

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Claims (2)

• I · · «« ♦ «Μ · | MT 4It «·· ■ t · • · t t · · Q 77 02 730.6 April 26, 1977 Κ / Τη.- 77/1202 Protection claims: 1. Use and handling packaging for steel fibers ^ in particular for use as concrete reinforcement wire pieces, characterized in that the steel fibers (2) are longitudinally aligned as a bundle (1) in a jacket (3), preferably made of plastic film, are held together. ί) 2. Pack according to claim 1, characterized in that the Pack consists of several bundle sections (1) arranged one behind the other, which are formed by bridges (5) Bridges are separated from each other. 7702730 07/28/77