HU219075B - Contraction joint rail and procedure for making contraction joint - Google Patents

Abstract

Contraction joint rail for fitting in a wall (4) to be concreted and the use of such a rail which consists of a strip-like bar (1) with a device fitted to it forming an injection channel (2) extending over the length of the bar (1). The bar (1) may consist of a thin-walled plastic component, sheet zinc or the like. The device forming the injection channel (2) may be a foam strip (12) applied to the bar (1). The bar (1) may be fitted on both sides with a device forming an injection channel (2) and/or have perforations (5) permitting the penetration of a sealing material. The contraction joint rail of the invention is applied to an area of the wall (4) to be concreted and extends over the entire heigh of the wall (4), whereby after the wall (4) has been concreted, sealing material is sprayed into the injection channel (2) thus formed.

Description

BACKGROUND OF THE INVENTION The present invention relates to a joint rail for identifying a location of shrinkage cracks, which is embedded in a wall, comprising a strip-shaped rail section and a structure attached to the rail section and forming a groove throughout its length.

It is a further object of the present invention to provide a method of producing a blind joint using a joint rail.

During concreting of longer, uninterrupted sections of the wall, the joint shrinkage causes the joints to shrink, which can lead to wall leaks. Therefore, especially at walls exposed to water, blind spots are created at predetermined locations of the masonry by incorporating elements that reduce the cross-section of the wall. Blind joints are broken through the crack-forming elements, thereby making the wall watertight.

Such blind joints are generally made using joint sealing tubes consisting of a tubular joint and a hard PVC reinforcing tube.

The sealing tubes are installed in the middle of the wall, while a triangular strip is attached to the inner and outer sides of the wall, thereby deliberately weakening the cross-section of the wall. The shrinkage cracks, which are thus locally limited, are sealed through the jointing tape.

The tubular joint is then welded to a joint that runs horizontally between the base plate and the ascending wall to form a waterproof, elastic layer.

The disadvantage of this type of joint sealing tubes is that they cannot be placed directly on the top surface of the base plate where the wall will be concreted to prevent water from penetrating the gap sealing space in the longitudinal direction.

Also known are blind rails made of hollow or solid sheet elements and having a plurality of longitudinal chambers. The elements also have some rigidity to carry a swollen strip on one of their longitudinal narrow sides. The swelling strip is also placed on the narrow side of the element on the base to seal the gap between the base plate and the wall to be concreted. The swelling seal strips on the lower, narrow side of the element must also be joined to the other swelling seal strips running between the base plate and the wall to be concreted, as the swelling strips will create the usual seal over the entire gap area.

The rails used here with a hollow chamber are made of plastic. To achieve perfect sealing, very strong swelling strips must be used, which adds to the cost of the blind rail used for blind jointing. Otherwise, the seal rail will have a limited sealing capacity, which, however, will not correspond to local high water pressures. Post-sealing of blind joints sealed with swelling strips can only be done externally, and if sealed on the rail itself, is particularly costly. In this case, the concrete wall needs to be engraved or sealed using a very costly local injection process that can only be introduced from the outside.

The applied swelling strip swells as a result of the flow of water. The swelling medium is a hydrophilic mass which is embedded in a carrier, particularly chloroprene rubber. The carrier material is primarily intended to provide the swelling medium with stability and flexibility. The hydrophilic (water absorber) component absorbs water molecules, thereby increasing its mass by about 1.5 to 4 times. This can create a pressure of up to 6.5 bar, which fills the cavity and makes it impermeable to water. When using the swelling medium, it should be noted that the swelling mass does not expand immediately, but slowly - over hours or days, and as a result, has limited application in variable areas with wet and dry periods. A definite advantage of the swelling medium, which is often used, is that it can be used in various materials such as concrete / plastic, concrete / iron, etc. provides a reliable seal between the joints.

For sealing the gap between two concreting sections, there are sealing devices which form a channel, and through the channel, an injection medium is injected at high pressure into and around the gap, thereby sealing it.

Swiss Patent Publication No. CH-PS 600 077 discloses a spiral spring-shaped support body surrounded by a first braided tube, which is also surrounded by an outer mesh-like, porous tube. After installing the sealant and completing the second concreting stage, sealant is extruded into the tubular sealant, which must exit at the site of the concrete defects. This tube is relatively complex to produce.

German patent application DE 83 35 231 U1 proposes protection against clogging of similar pipes with concrete slurry. A nonwoven material is introduced between the spiral spring support body and the outer mesh-like tube, which allows moisture to pass but is impervious to small concrete particles.

Finally, German patent application DE 86 08 396 U1 discloses an additional sealing device which attempts to eliminate the difficulty of adjusting the injection tube by means of straps fitted on the tubular body and suggests a longitudinal compression point of the tubular body through which the sealant can enter the concrete.

The construction of such pipes will become more and more complicated and costly as the upgrades progress and the costs will also increase. There is also the risk that the tubes will be crushed during concreting and that injection of the injection material will be difficult.

Therefore, EP 0 418 699 A1 proposes a sealing device consisting of an open section hat section. The free longitudinal edges of its side surface are planted and mounted on a concrete surface so as to form a flow passage between the section and the concrete surface for transferring sealant. The sealing material is introduced into the flow duct at high pressure and exits to the concrete flaws between the concrete surface and the free longitudinal edges.

An additional sealing device is preferably a rectangular cross-section foamed body or foamed strip, which is mounted on a concrete surface. Sealant Flow2

EN 219 075 Β is made by the body itself, the sealant passes through the pores into the region of the gaps.

Although the sealing device represents a significant step forward compared to conventional pipes, it is not suitable for forming blind gaps, since an open profile is laid on one side of the finished concrete surface of the base slab, which forms the injection channel. However, when forming a joint gap, the structure forming the joint gap must be concreted on both sides in order to fill the section open on one side with concrete.

DE 93 20 134 describes an injectable joint rail for sealing a blind gap. The gap rail is an extruded tube with ribs on both sides, the central portion of which comprises at least one through channel in the longitudinal direction. The outlet is formed by a longitudinally extending slot in the through channel which is sealed with a sealing strip embedded in a mold. The sealing strip opens valve-like when the injection fluid is injected so that the injection fluid can escape from the injection port.

The joint rail is significantly cheaper, and therefore more advantageous, than the standard groove rails which do not have a groove. However, the construction of the injection channel is expensive because the channel is hollow and requires a special sealing strip to seal it. The two-sided seal requires two injection grooves, which, while increasing the safety of sealing, also increases the cost of the joint rail.

DE 41 40 616 A1, in particular Figure 4, discloses a simpler version of a double-sided gasket. It has a groove on one side of the joint and a swelling strip on the opposite side of the groove. The injection groove and the swelling strip on the gap rail are behind each other.

An injection tube is attached to the joint plate of DE 93 15 974 U1. The injection tube is centered in the space between the puncture-free joint plate and a puncture wall having a puncture.

Summarizing the state of the art, it will be appreciated that there are joint rails for sealing blind joints that provide reliable sealing, especially when provided with a bilateral injection duct. However, if the construction of the joint rail is simplified, the safety of the blind joint seal is reduced.

Many cost-effective, simple joint rail embodiments are known, but they have only one side injection groove and therefore the injection material can only be delivered to one side.

The plurality of simpler embodiments indicates that there is a widespread need for simple and inexpensive joint joints for blind joints that can be used to seal blind joints safely by injection.

It is an object of the present invention to provide a simple, cost-effective joint rail for a blind joint, which allows secure sealing of the blind joint even afterwards.

The object of the present invention has been achieved by further developing the joint rail described in the introduction, such that the rail section has a perforation suitable for transferring injected sealing material to the surface of the rail in contact with the structure forming the injection channel.

In the process, the joint rail is set inside the wall to be concreted at its full height, the wall is concreted and sealant is injected into the groove of the joint rail.

By means of a strip rail and a groove rail which is attached to the rail and extends along its entire length and which forms an injection channel, a blind joint can be produced which can be subsequently sealed by injecting sealant into the injection channel. Because the rail has a perforation on its surface in contact with the structure forming the groove, it is possible to inject boundary sections on both sides of the rail using the joint rail of the invention, although the rail has only a single groove. The process is simplified, but the post-seal is much safer.

By providing the groove with two injection channels located on opposite sides of the perforation, the cross-section of the injection channels can be reduced, since the injection channels are interconnected through the perforation, thereby flushing any local defects in the channel on the other side of the groove. .

Preferred embodiments of the invention will be apparent from the dependent claims.

The invention will now be described in more detail with reference to the accompanying drawings. The

Fig. 1 shows a first embodiment of the device according to the invention, a

Figure 2 is a cross-sectional view of the embodiment of Figure 1, a

Figure 3 shows a second embodiment of the device according to the invention, a

FIG. 4 is a cross-sectional view of the embodiment of FIG

Figure 5 shows an embodiment with a swelling strip, a

Figure 6 is a cross-sectional view of the embodiment of Figure 5, a

Figure 7 shows an embodiment having a hollow injection port, a

Figure 8 is a cross-sectional view of the embodiment of Figure 7, a

Figure 9 bore for injection of sealant, a

Figure 10 shows an embodiment of an injection tube, a

Figure 11 is a cross-sectional view of the embodiment of Figure 10, a

Figure 12 is a cross-sectional view of a further embodiment of the joint rail according to the invention.

The joint rail according to the invention comprises a strip-shaped rail section 1 and at least one injection channel 1 which is attached to the rail section and extends along its entire length.

Preferably, the rail section 1 is formed in the form of a sheet, i.e. of a thin-walled surface material.

EN 219 075 Β, which as a disk has a certain rigidity. The strip-like track section 1 has two lateral longitudinal edges la, one transverse edge of a lower and upper lb, and two downward rail sections defined by longitudinal edges la and transverse edges lb.

The structure forming the injection channel 2 may be either a conventional injection channel or an open-sectioned hat section of the sealing device, which is mounted on the lower rail surface along the free longitudinal edges of its side surfaces. It is particularly advantageous if the structure forming the injection channel 2 is a foam strip 12 made of an open-cell or open-pore foamed material.

The width of the rail section 1 is preferably slightly smaller than the thickness of the wall to be concreted so that it can be concreted at a distance of one centimeter from the outer surface of the wall. The reduction in cross-section may also be exacerbated by triangular bars mounted on the outer wall surface. The length of the rail section 1 corresponds essentially to the height of the wall, so that the rail section 1 is set to the appropriate base section 2 of the baseboard before concreting and extends to the top of the wall to be concreted.

The expanded foam strip 12 preferably has a rectangular cross-section, wherein the cross-sectional area is selected such that the foamed material is not compressed by the boundary concrete to impermeable to the injection material, but not too large to fill too much injection material. Injection ducts with too large cross sections also have the risk that, in the case of larger leaks, the injection pressure of the sealant will not be sufficient to produce a sufficient seal.

The foamed material 12 is preferably an open-cell foamed material made of hard plastic, so that the foamed strip 12 has some inherent stiffness.

Preferably, the perimeter 5 is provided with a perforation 5 on the surface of the rail 1 in contact with the foamed strip 12, thereby allowing the injected sealant to pass through the rail 1.

The foam strips 12 may be provided on both sides of the rail 1, that is, on both sides of the rail, such that there is an injection groove 1 on each side of the plate 1. The two foamed strips 12 need not be in contact with each other since, through the perforation 5 of the rail 1, pressure equalization is created between the two foamed strips 2 during injection of the sealant. The cross-sectional areas, i.e. the foamed strips 12, may also be smaller in cross-sectional dimensions, since if one of the foamed strips encountered local problems during operation, they would be compensated by a parallel channel running on the opposite side of the plate. The foamed strips 12 are preferably centered on the lower rail surface.

The injection channel 2 is formed by either a single foam strip 12 or two foam strips 12, each of which, together with the perforation 5, allows sealing of the water leakage path on both sides of the down gauge surface.

The injection groove assembly 2 may also be mounted on one of the lateral edges 1a of the rail 1, but the resulting groove groove 2 is close to the wall surface, causing the injection material to exit the wall shortly, thus preventing the sealing pressure.

The rail 1 is a thin-walled element, either made of plastic or metal. Preferably, the connection between the foam strip 12 and the rail 1 is achieved by gluing.

The rail section 1 can take the form of a plate-shaped element (Figures 1 and 2) or a shaped section (Figures 3 and 4) for receiving all or part of the foamed strip 12. The shaped rail 1 has a greater rigidity and also protects the foamed material from the concrete pressure of the enclosing masonry 4 by surrounding the sides of the foamed strip 12, i.e. the side surfaces 8 and one of the two surfaces 9 parallel to the gap. This region of the foam strip 12 of the plate 1 may be provided with a perforation 5 and extend over one or all three sidewalls.

The installation of the joint rail according to the invention begins with the placement of the joint rail in the formwork section of the wall to be concreted. The gap rail is placed on the same concrete slab on which the wall will be concreted, whereby the rail section 1 must be substantially perpendicular to the sidewalls 4 of the masonry to be concreted. Once the concreting is complete, the sealant is injected into the sealing channel formed by the foamed strip 12, which then completely fills the blind gap created during the bonding process. Injection of the sealant can take place when the next section 11 has already been inserted into the masonry 4, including the blind joint, and closes the injection channel 2 from above. The injection channel 2 is then drilled externally and a sealant is injected through the bore 10 (Figure 9). If the top end of the foam strip 12 is left open, the injection tube may be led from above to the foam strip, however, the top open end of the foam strip 12 must be closed around the injection tube to inject the injection material under pressure.

Preferably, the joint rail of the invention with the rail 1 and the foam strip 12 attached thereto can be associated with the swelling strip 6 (Figures 5 and 6). The swelling strip 6 is secured to the entire length of the rail 1 at least on one side of the rail 1, but preferably on both sides, or on the longitudinal edge 1a of the side. After the masonry has been completed, it will be determined whether the swelling strip 6 provides sufficient seal to the blind gap 7. If this is the case, subsequent injection of the sealant may be omitted. However, should leakages occur, the inadequately sealed blind gap can be sealed at any time by drilling the injection port 2 and injecting sealant. There is therefore no risk in applying the swelling strip 6, since the sealing can be carried out at any time. In most cases, a satisfactory seal can also be achieved with swelling strips 6 of relatively small cross-section. The cost of the relatively expensive swelling strips 1 can thus be limited, which in combination with sparing foam material, which is economical compared to the swelling strip, solves the problem at low cost without having to risk the risk of an airtight blind gap.

HU 219,075 Β

The arrangement of the foamed strips 12 described above, the arrangement of the foamed strips 12, can be carried out in the same way in the case of other injection channel 2 structures with respect to the swelling strips 6 and the perforation 5.

Another preferred embodiment is a rail section 1 having a hollow injection groove 2 which is enclosed by two lateral walls 17, 19, a front 16 and a back wall 18 of the rail section, and expels the sealant through the perforation 5 (7 and 8). . figure). The injection port 2 may be filled with the foamed strip 12, or the slits of the perforation 5 may be filled with felt or foam permeable to the sealant to prevent the flow of concrete during concreting. The slits of the perforation 5 may also be disposed on the side surfaces of the injection port 2, the arrangement and size being selected according to the sealants and the concrete used. However, it is important that the sealing material is able to escape on both sides of the gauge 1. This is necessary to ensure that the blind gap is completely sealed during the injection procedure.

Instead of a foamed strip, a standard injection tube may be used as an injection channel device.

In the case of a conventional injection tube having a circular cross-section, it is advantageous to use an injection tube on each side of the rail section or to form the perforation slits as a longitudinal hole so that the sealing material can properly pass through the rail section.

If only one injection tube 13 is connected to a rail 1 with a perforation 5, this can preferably be formed from the tubular portion 14 and the strip base 15. The bar-shaped base 15 must be perforated 5 of the rail 1 (Figures 10 and 11). The strip-shaped base 15 has outlets for the sealing material. This is a novelty in comparison with known injection tubes having a bar-shaped base, in which the bar-shaped base is used as an anchor for easier placement of the injection tubes in the concrete to be sealed. With such an arrangement, it is certain that the sealing material injected into the injection tube 13 exits both the tube and the concrete surrounding the tube and reaches the other side of the gauge 1 through a strip-shaped base 15 and preferably through the perforations 5 of the same material. to seal the faults that occur there.

A12. Fig. 4A is a cross-sectional view of a further embodiment of a joint rail according to the invention.

The rail section 1 of this joint rail is symmetrical to the transverse centerline 20. In the center of the rail 1 there is a structure forming the injection channel, which is divided into three parts, a central hollow channel 2a and the foam strip 12 forming the injection channel into two lateral part areas 2b. The hollow channel 2a has a rectangular cross-section and is delimited by two side walls 21, as well as a covering wall 21 and a base wall 23. The side walls 21 are spaced apart, approximately equal to the thickness of the sheet-like material of the rail 1.

The cover wall 22 and the base wall 23 extend on both sides of the side walls 21 so that the cover wall 22 and the base wall together with the side walls 21 form a laterally open groove for accommodating the foamed rain. Each side wall 21 has openings for the perforation 5, so that the hollow channel 2a is connected to the foamed strips 12. The openings may also be alternately disposed in the side walls 21, so that the cross-section of the rail 1 shown in Figure 12 is taken up through the opening 5 of the right side wall 21.

In order to reinforce the gap rail, the rail 1 is provided with reinforcing ribs which are always perpendicular to the down rail surface and extend over the entire length of the rail 1.

The reinforcing ribs 24 extend the water path in the blind gap so that they not only contribute to the rigidity of the rail 1 but also provide a better seal.

Claims (20)

PATENT CLAIMS 1. A joint for a blind joint, to define the location of shrinkage cracks, which is concreted in a wall, the joint contains a strip-like rail section and a structure (2) in which it is injected, extending along its entire length, has a perforation (5) for transferring sealing material injected on its contact surface. 2. The joint rail according to claim 1, characterized in that on each side of the rail section (1) there is a structure forming an injection channel (2) extending over the entire length of the rail section (1). The joint according to claim 1 or 2, characterized in that the rail section (1) is a thin-walled piece of plastic. A joint rail according to claim 1 or 2, characterized in that the rail section (1) is made of galvanized sheet. 5. A joint rail according to any one of claims 1 to 4, characterized in that the rail section (1) has a swelling strip (6) substantially parallel to one of the structures forming the injection channel (2). The joint rail according to claim 5, characterized in that the swelling strip (6) is connected to one of the lateral longitudinal edges of the rail section (1). The joint according to claim 5 or 6, characterized in that the swelling strip (6) is adjacent to one of the structures forming the injection channel (2). 8. A joint rail according to any one of claims 1 to 4, characterized in that a swelling strip (6) is provided on both sides of the rail section (1). 9. A joint rail according to any one of claims 1 to 3, characterized in that the structure forming the injection channel (2), the rail section (1) and / or the swelling strip (6) and the rail section (1) are glued to each other. 10. A joint rail according to any one of claims 1 to 3, characterized in that the structure forming the injection channel (2) is an open cell foam strip (12), preferably made of a hard foamed material. HU 219,075 Β The joint rail according to claim 10, characterized in that the rail section (1) has a shape which at least partially accommodates the foamed strip (12). 12. All. The joint rail according to claim 1, characterized in that the rail section (1) encompasses at least three longitudinal sides of the foamed strip. 13. A joint rail according to any one of claims 1 to 4, characterized in that the structure forming the injection channel (2) is a one-piece hollow channel (2a). The joint rail according to claim 13, characterized in that the hollow channel (2a) is laterally connected to the foamed strip (12) and the hollow channel (2a) is in communication with the foamed strip (12). 15. A joint rail according to any one of claims 1 to 4, characterized in that the structure forming the injection channel (2) is an injection tube (13). The joint rail according to claim 15, characterized in that the injection tube (13) comprises a tubular part (14) and a strip-shaped base (15), and the strip-shaped base (15) comprises a perforation (5) of the rail section (1). the canister. 17. A joint rail according to any one of claims 1 to 3, characterized in that the rail section (1) is made of a thin-walled, rigid material in itself. 18. A joint rail according to any one of claims 1 to 6, characterized in that the structure forming the injection channel (2) is centrally located on the rail section (1). 10 placed. 19. A method for producing a blank gap as described in Figures 1-18. A joint rail according to any one of claims 1 to 3, characterized in that the joint rail is set at its full height inside the wall to be concreted, the wall is tinted and a sealant is injected into the groove groove (2). Method according to claim 19, characterized in that the injection channel (2) is inflated to inject the sealant.