RO117336B1 - Beam for jointing predetermined breaks - Google Patents

Abstract

The invention relates to a beam for jointing predetermined breaks in a wall in concrete constructions. According to the invention, the beam for jointing predetermined breaks comprises at least one injection channel (2) extending over the length of the beam and having at least one perforation (5) so that sealing material may penetrate through the jointing beam (1). The beam is provided with said injection channel (2) comprising a strap (12) of foam material, consisting of two lateral surfaces (8) and a frontal surface (9), all located on the length of the beam for jointing (1), and possibly taken over, at least partially, by the injection channel (2) contour. In order to fill the injection channel (2), there is provided a strap (12) made of foam material having some open pores and exhibiting rigidity. In one embodiment, the beam for jointing (1) is made of zinc sheet or of thin plastic material and an expandable strap (6) is soldered on both sides, said strap being approximately parallel to the injection channel (2), located also on both sides of the beam for jointing (1) so that expandable strap (6) be located on the longitudinal side edge of the beam for jointing (1) next to the injection channel (2). In other embodiment, the injection channel (2) is configured by an injection hose (13), comprising a hose segment (14) which is linked along the generatrix with a base strap (15) set in an adequate manner, on the jointing (1) beam surface with perforations (5). In the third embodiment, the beam has the injection channel (2), made in one piece, being provided with an empty middle channel (2a) and two lateral channels (2b) each having a strap of foam material inserted in one side, the empty middle channel (2a) communicating with the strap (12) of foam material.

Description

The present invention relates to a beam for cracking predetermined cracks in a wall, to concrete constructions.

When concreting long and continuous parts of the wall, cracks are formed, based on contracting the concrete, when making a socket, which can lead to leaks in the wall. That is why, in different places, elements that reduce the section of the wall and produce predetermined cracks, especially on the walls that are in contact with the water, are mounted. These cracks are sealed by the production elements of these cracks, so that wall tightness is guaranteed.

Usually, they are used to fill these joints - predetermined cracks - some joint sealing tubes, formed of a ribbon band, in the form of a hose and a stiffening hose, of hard PVC.

By installing the joint sealing tubes, in the center of a wall, and at the same time, of triangular beams, inside and outside, the section of the wall is weakened. In this way, the contraction cracks are locally bordered and sealed, by means of a ribbon.

The hose strip is welded with a tread band in front of the floor and horizontal plate against the wall so that an elastic, impermeable surface is formed.

In this kind of joint sealing tubes, it is disadvantageous that they cannot be placed on the surface of the floor plate, on which the wall is concrete, because otherwise it can penetrate water in the longitudinal direction of the joint sealing volume.

Subsequently, the beams for jointing predetermined cracks, consisting of concave or filled elements, with several chambers, longitudinally known are known. These beams are provided with a certain thickness, in order to be able to take in a groove, on a longitudinal unfolding of the edge, an expandable strip to moisture. The expandable tape is also applied to the bottom edge of the rail, to ensure a tight seal between the floor and the concrete wall. This sealing strip, provided on the lower edge of the rail, is joined with other sealing strips, expandable, extended in the longitudinal direction of the joint, between the floor and the concrete wall, through which an ordinary sealing of the entire area of the joint is achieved, with the help of the expandable tape.

These concavity beams are made of plastic. Subsequently, very thick expandable strips must be used to guarantee a safe sealing, which on the other hand raises the costs of the beam of pre-determined cracks, or allows a limited sealing effect, which is insufficient at high local water pressures. . 0 subsequent sealing of joints - predetermined cracks - with such expandable strips can be made or only from the outside or is very expensive, if the beam itself must be re-sealed. The concrete wall must then be broken or the local sealing made, by the very expensive method of point injection.

The expandable band, used alongside, expands under the influence of water. The expansion agent is a hydrophilic mass, which is embedded in a carrier substance, most commonly chloroprene gum. The underlying substance has, above all, the task of borrowing, the expandable agent, stability and elasticity. The hydrophilic composition takes up the water molecules and thus increases its volume from 1.5 to about 4 times.

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At this, a pressure of up to 6.5 bar is formed, which fills the surrounding cavities and, in this way, must make them waterproof. When using this kind of expandable agents, it should be kept in mind that the expandable mass does not dilate instantly, but slowly, after several hours or days and, for this reason, can be used limited, 50 in regions with alternating, wet and dry periods. . An advantage of expandable agents (and for this reason they are often used) lies in the possibility of safe sealing, of joints between different materials, such as, for example, concrete / plastic, concrete, iron and so on.

Subsequently, the sealing devices of a joint between two concrete sectors are known, which form a channel through which, at high pressure, an injection agent is introduced into the joint sector which it seals.

It is known, from the patent CH PS 600 077, a hose consisting of a helical spring-shaped support body, which is surrounded by a first braided hose, which, in turn, is wrapped in a braided hose, which, in turn, is wrapped in an outer hose in the form of a porous network. After the installation of this sealing device and the concrete of the second concrete sector, a sealing material is pressed into the sealing device, in the form of a hose, which must exit into the defect locations of the concrete. Such a hose is a relatively complicated device to manufacture. 65

In order to better prevent the clogging of concrete with such a porous hose, it is known, from patent DE 83 35 231 IU, the introduction between the support body in the form of a helical spring and the outer hose, in the form of a net, of a non-textile material. , which is permeable to liquids, but not permeable to very fine concrete particles. 70 finally, it is known from patent DE 86 08 396 U1, another sealing device, which, on the one hand, seeks to remove the disadvantages of positioning the hose, by means of the helices provided on the body of the hose and, on the other hand, it proposes a predetermined breaking point, in the longitudinal direction of the body in the form of a hose, through which the sealing material in the concrete must exit. 75

The construction of these hoses becomes, with the progress of the development, more and more complicated and expensive, together with the costs. In addition, there is a danger of crushing hoses in concrete, which makes it difficult to introduce the injection material.

To remedy this disadvantage, it is known from EP O 418 patent

699 A1, a sealing device consisting of an open profile, with section 80 in the form of a dome, which is mounted, placed, on the concrete surface, on the sides with free longitudinal edges so as to form a drainage channel for the material of sealing between the profile and the concrete surface. The sealing material is introduced under high pressure into the drainage channel and appears between the free edges of the profile and the concrete surface at the defect sites of the concrete. Another known sealing device 85 is composed of a body, preferably, of rectangular section, formed of a foam material or foam tape, which has passage pores, which is mounted on the concrete surface, so that the drainage channel is formed for a sealing material, through the body itself, to which the sealing material exits the passage pores, in the joint area. 90

The sealing device represents a significant progress compared to the usual storms, but it is not provided for joints - predetermined cracks - because,

RO 117336 Bl on an already ready concrete surface of the floor, a unilateral open profile is placed to form the injection channel. In the manufacture of joints - predetermined cracks, the joints are constructed on both sides - so that such a unilateral open profile would be filled with concrete.

The predetermined cracking beam, according to the invention, removes the disadvantages above, by having at least one injection channel, provided along its length and provided with at least one perforation, so that the sealing material can penetrate through the beam. for speaking. The beam is provided with the respective injection channel, which comprises a strip of foam material, which consists of two lateral surfaces and a frontal surface, all along the length of the beam for the joint and can be taken, at least in part, by the contour of the injection channel. . For filling the injection channel, the foam strip is provided, which has open pores and rigid properties. In one embodiment, the jointing beam is made of zinc sheet or small-thickness plastic material and is bonded on both sides by an □ expandable strip that is approximately parallel to the injection channel also disposed on both sides of the beam. so that the expandable strip is arranged on a longitudinal, lateral edge of the joist beam, near the injection channel. In another embodiment of the injection channel, it is configured by an injection hose, consisting of a hose segment that is connected, on the generator of the hose segment, with a base band that is properly positioned on the surface. with perforations, the beam for the joints. In another embodiment, it has the injection channel, in one piece, provided with a hollow middle channel and two side channels, in which a strip of foamy material is inserted, on one side the hollow middle channel, communicates with the foam tape. The assembly that makes the injection channel is arranged transversely on the joint beam, which is made of a material with its own stiffness and small thickness.

In the following, an embodiment of the invention is given, in connection with FIG. 1 + 12 which represents:

- Fig. 1, embodiment of the device according to the invention;

- fig.2, section A-A of fig.1;

FIG. 3 is a first embodiment of the device according to the invention;

- Fig. 4, section B-B of Fig. 3;

-fig.5, embodiment of the device according to the invention with expandable tape;

- fig.6, section D-D of fig.5;

- Fig. 7, embodiment of the device with concave injection channel;

- Fig. 8, section C-C of Fig. 7;

- Fig. 9, a view of a perforation for injection of a sealing material;

FIG. 10, embodiment of the device, with injection hose;

FIG. 11, section E-E of fig. 1 □;

FIG. 12, section through another embodiment of a joint beam with predetermined cracks according to the invention.

The predetermined crack cracking beam according to the invention consists of a strip 1 beam and at least one device attached to an injection channel, which extends the entire length of the beam 1.

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The beam 1 is preferably formed of a material such as sheet metal, meaning that it is composed of a material of small thickness and two dimensions having some inherent rigidity. The beam 1 in the form of a strip has two longitudinal edges 1a, a transverse edge 1b upper and lower and a surface of the beam 1c bounded by the edges 1a and 1b.

The device that forms an injection channel 2, which may be an ordinary injection channel or a sealing device, formed from a section-open profile and in the form of a vault, which is disposed on the surface of beam 1c with the two longitudinal edges free of lateral parts. Desirably, it may be a device consisting of an injection channel 2 and a strip 12 of foaming material, consisting of a foaming material with cells, respectively pores, open.

The beam 1 preferably has a width smaller than the thickness of the concrete wall, so that it can be concrete at a distance of one to a few centimeters from the outer surface of the wall. The section can be reduced, in connection with the attachment, from the outside, to the surface of the wall, with some triangular windows.

The length of the beam 1 must correspond to the height of the wall, so that the beam 1 is placed, before concrete, on a portion 3 of the floor and reaches the upper edge of the wall to be concrete.

The foaming material of the strip 12 preferably has an almost rectangular section, at which the surface of the section must be chosen in such a way that the foaming material to be injected cannot be made impermeable, by pressing by the concrete that borders it and must not either too large, to keep the volume that is filled with the injection material small. In injection channels 2 with too large sections, there is the additional danger of not being able to guarantee the injection pressure of the sealing material, due to the excessive leaks.

The foaming material of the strip 12 is preferably to be a foam material with open pores, which is composed of a rigid plastic material, so that the foaming material of the strip 12 has a certain inherent rigidity.

The beam 1 is preferably provided with a bore 5 in the contact area with the foam material of the strip 12 so that the injected sealing material can penetrate through the beam 1.

It is possible to provide, on both sides of the beam 1, respectively both surfaces of the beam 1c of strip 12 of foaming material, so that on both sides of the beam 1, the injection channels are formed 2. The two strips 12 of foaming material need not be linked to each other, but at least one perforation 5 in the beam 1, between the two strips 12 of foam material, allows a pressure balance of the sealing material at the injection and allows the choice of a surface of the section, ie the thickness of the strip 12 of foam material, more small, so that a local dysfunction of a strip 12 of foam material can be balanced by the injection channel 2, which runs parallel to the other side of the beam 1. The strip 12, respectively the strips 12 of foam material, are to be attached, preferably , transversely on the beam surface 1c.

By providing at least one perforation 5 and a single strip 12 of foaming material, as a device for forming an injection channel 2, as well as by providing two strips 12 of foaming material, the sealing of the two channels is guaranteed. water, along the two surfaces of beam 1c.

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The device forming the injection channel 2 may also be positioned on one of the longitudinal lateral edges, where, however, the injection channel 2 is positioned close to the surface of the wall, so that there is a danger that the injection material will come out the most short of the wall, so that the pressure that guarantees the tightness cannot be realized.

The beam 1 is an element with a small thickness, which can be made of metal or plastic. The connection between the strip 12 of foam material and the beam 1 is preferably made by soldering.

The beam 1 represents an element with a flat shape (figs. 1 and 2) or can be, in one embodiment, provided with a contour (figs. 3 and 4) to take the strip 12 of foamed material, partially or totally . By its contour, the beam 1 has a greater rigidity and offers the foam material a protection against the pressure of the concrete bounded by the wall 4, because the lateral flanks, respectively the lateral surfaces 8, of the foam material of the strip 12 and one of the two surfaces 9 of the material The foam strip 12 is parallel to the joint and is included by the beam 1. This area of the beam 1, which includes the strip 12 of the foam matrix, can have at least one perforation that can be provided, at one or all three side splits, which include the foaming material of the strip 12.

The assembly of the beam for the predetermined cracks, according to the invention, takes place by bringing the beam 1 for the predetermined cracks, in the formwork area of the wall to be concrete.

The beam 1 for predetermined cracking joints is placed here, on the concrete sole, on which the wall will have to be concrete, to which the beam 1 must somehow stand perpendicular to the lateral surfaces of the concrete wall. After the concrete process, the sealing material is injected, through the sealing channel formed by the strips 12, of foaming material, then the predetermined crack that is formed is completely filled, after the concrete hardening process. The injection of the sealing material can take place when on the wall 4 with the beam 1 for predetermined cracking, fixed on it, another portion 11 is added, which seals the injection channel 2 towards the top. The injection channel 2 is then drilled from the outside through the wall 4 and, through a hole 10, sealing material is injected (fig. 9). If the foam strip 12 ends open at the top, an injection hose may be attached to the top of the foam strip 12, to which the open top end of the foam strip 12 should be sealed around hose, so that the injection material can be injected under pressure.

More advantageously, the pre-determined cracking beam may be used with the beam 1 and the foam strips 12 attached, in connection with an expandable strip 6 (Figs. 5 and 6). The expandable strip 6 is attached, at least on one side, preferably on both sides of the beam 1 or on the longitudinal lateral edges to the beam 1 throughout its length. After finishing, it is checked whether the expandable tape guarantees the necessary tightness in the joint - predetermined crack. In the case of these operations, however, leaks can occur which can, at any time, be covered by injecting sealing material, by drilling the wall associated with the drainage channel.

RO 117336 Bl injection 2 and thus being able to seal the joint - predetermined crack. Subsequent injection of sealing material is done by drilling the wall associated with injection channel 2 and injecting sealing material. By using the expandable strips 6, there is no risk because the sealing can be redone at any time thereafter. Thus expandable strips 6 with relatively small thicknesses can be used, which in most cases allow a sufficiently good sealing. In this way, when using the relatively expensive expandable strips 6, the costs are kept at acceptable levels, which, compared to the strip 12 of foam material, is cheaper compared to the expandable strips 6, and offers, overall, a convenient solution of to the problem, without the risk of a joint - predetermined crack - leaking and which subsequently cannot be sealed. The arrangement of the foam strips 12, described above, arrangement with respect to the expandable strips 6 or, in relation to at least one perforation 5, may form, in the same way, with other devices, an injection channel 2.

In another embodiment of the beam 1, it has an injection channel 2, which is completely comprised of two side lining walls, one anterior and one posterior of the beam 1 and which causes the sealing material to pass outwards, through perforation 5 (figs. 7 and 8). The tubular injection channel 2 can be filled with strips 12 of foam material or the openings of the perforations 5 can be sealed by a textile or foamy or similar material, which allows the passage of the sealing material but does not allow the concrete to enter the concrete process. The openings of the perforations 5 may also be provided on the sides of the injection channel 2, at which the arrangement and size can be chosen, depending on the sealing materials and the concrete used. However, it is necessary for both sides of the beam 1 to be able to come out with sealing material, thus guaranteeing the complete seal of the joint - the predetermined crack - through the injection process.

Instead of a strip 12 of foam material, an ordinary injection hose 13 may also be used, different from that used on the device formed by the injection channel 2. When using an ordinary injection hose 13 with a circular section, it is preferably the use of two injection hoses 13 on both sides of the girder 1 or to form perforations 5 with an elongated profile so that sufficient passage through the beam 1 is provided for the sealing material.

If only a single injection hose 13 is attached to a beam 1 with perforations 5, then preferably an injection hose 13 which is composed of a segment 14 in the form of a hose and a band 15 in the form of base, which base is applied to the perforations area 5 of the beam 1 (figs. 10 and 11), the strip 15 is provided with some outlet openings for the sealing material. This is a new element compared to the usual injection hoses 13, where the base strip 15 is only used as a fastening element for easier attachment of the injection hose 13 to the sealing area. By such arrangement, it is ensured that the sealing material injected into the injection hose 12 exits from the hose 13 into the surrounding concrete area of the hose 13 as well as above the base strip 15, which is preferably composed of the same material as the hose segment 14, and thus reaches through the perforations 5 on the other side of the beam 1, in order to seal the defective places that have appeared there.

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RO 117336 Bl in fig. 12, is presented, in section, another embodiment of beam 1 for said predetermined cracks, according to the invention.

Thus, the Test beam is symmetrically positioned around a middle transverse axis 20. At the transverse middle of the beam 1, the assembly is formed to form an injection channel 2, which is divided into three zones, a concave channel 2a of the middle and two channels. lateral 2b, with a subdomain of the injection channel 2, consisting of strips 12 of foam material. The middle channel 2a, concave, has a rectangular section and is bordered by two side walls 21 and a ceiling and one parsodeal 22, 23. The side walls 21 are positioned at a small distance from each other, which corresponds to the thickness of the beam material 1.

The ceiling and floor lining walls 22, 23 extend on both sides over the lining side walls 21, so that the ceiling and floor walls 22 and 23 together with the side walls 21 have open side grooves in which they take over the strips 12 of foam material. In both lining side walls 21 there are openings for at least one perforation 5 so that the middle channel 2a, concave, is connected to the strips 12 of foam material. The openings in the lining side walls 21 may be positioned in such a way that the section of the beam 1 shown in FIG. 12, extends only in the right wall, through openings of perforations 5.

For stiffening the beam for predetermined cracking joints, the beam 1 is provided with stiffening ribs 24, which are each connected to the ribs perpendicular to the surfaces of the beam 1 and extending along the entire length of the beam 1.

The stiffening nerves 24 also perform a prolongation of the water path, in a predetermined crack, so that not only the rigidity of the beam 1 is improved, but also a better sealing is achieved.

claims

Claims (7)

1. Predetermined cracking beam for use in incorporation into a concrete wall, to which the jointing beam is in the form of a flat-band, to which it is attached and which has an injection channel, which extends over its entire length, characterized in that it has at least one injection channel (2), provided along its length and provided with at least one perforation (5), so that the sealing material can penetrate through the joint beam (1). 2. Beam according to claim 1, characterized in that it is provided with said injection channel (2), comprising a strip (12) of foam material, which is made up of two side surfaces (8) and a front surface (9). , all along the length of the joint beam (1) and can be taken, at least in part, by the outline of the injection channel (2). 3. Beam according to claim 2, characterized in that, for filling the injection channel (2), the strip (12) of foaming material is provided, which has some open pores and which has rigid properties. RO 117336 Bl 4. Beam according to claim 1, characterized in that, in one embodiment, the jointing beam (1) is made of zinc sheet or small-thickness plastic material and has, on both sides, an expandable strip on each side. (β], which is approximately parallel to the injection channel (2), also disposed on both sides of the spoke beam (1), so that the expandable strip (β] is arranged on a longitudinal side edge of the beam for spoken (1), near the injection channel (2). Beam according to claim 1, characterized in that, in another embodiment of the injection channel (2), it is configured by an injection hose (13), formed by a hose segment (14), which is connected, on the generator of the segment (14) of the hose, with a basic strip (15), which is properly placed on the surface with perforations (5) of the joist beam (1). 6. Beam according to claim 1, characterized in that, in another embodiment, it has the injection channel (2), in one piece, provided with an empty middle channel (2a) and two side channels (2b). , in which a strip (12) of foam material is inserted, on one side the middle channel (2a) empty communicates with the strip (12) of foam material. 7. Beam according to Claims 1 to 6, characterized in that the assembly which makes the injection channel (2) is arranged transversely, on the joint beam (1), which is made of a material with its own stiffness and small thickness.