EP1061189A1 - Joint sealing for buildings - Google Patents

Abstract

The sealing strip (1) for construction and expansion joints between building elements has a cross section which comprises a middle section (4) and two oppositely oriented sections (2, 3) running in the longitudinal direction of the strip. At least one of the sections (2, 3) is provided with facilities (7, 9, 17) for injecting a sealing compound into the joint and its surrounding materials (in particular, concrete).

Description

The present invention relates to a joint tape according to the preamble of claim 1. In particular, it relates on such joint tapes for sealing Construction joints, expansion joints and any joints such joints.

The so-called construction joints, especially in buildings cast concrete, created by creating sections of walls or floors where the sections on Butt joints are interconnected or at an angle put together, e.g. Walls on floors. Between However, building units often also have to have so-called expansion or Dilatation joints are provided to prevent movement of the To balance units against each other, e.g. at Temperature changes. All of these joints must be in the To be sealed to prevent intrusion or Penetration of water, oil, dirt etc., e.g. in or out a building, room or container.

A known solution for sealing construction joints exists in a so-called injection hose in the joint embarrassed. After creating the joint abutting units becomes liquid Sealing material pressed into the injection hose, where the pressure applied is e.g. in the range of 5 to 30 bar, but usually not higher than 100 bar in the short term, lies. The sealing material passes through Holes that the wall of the injection hose has, into the joint and hardens in it. The sealing material can e.g. be a polymeric material that is in the joint hardens and partly a water-impermeable Solid forms.

One disadvantage of this method is that Injecting represents an additional step. It is after all, not possible either, with absolute certainty ensure that the sealing material the joint completely filled out.

Another known way to seal joints consists in the use of so-called joint tapes. Joint tapes are essentially strip-shaped and exist usually made of plastic. The width is e.g. 20 cm, i.e. the joint tape extends into the two building elements about 10 cm each. Because steel reinforcements are only approx. 30 mm (Minimum concrete cover to avoid corrosion) below of the concrete surface must be in the area of Joint tapes take special precautions. In the As a rule, these consist of a special, complicated Reinforcement course. The relatively large penetration depth of the Joint tapes in the masonry is necessary to ensure tightness to ensure; concrete in particular does not work intensely Binding with the material of the joint tapes, which is why alone a large contact area equivalent to the large one Penetration depth can ensure the required tightness.

The usual in the manufacture of floor slabs Exterior joint tapes are made before creating the floor slabs laid and the base plates one after the other with joints poured along the joint tape. Particular problems with this form are the risk of pollution before or during the pouring of the floor slabs. Before concreting the second stage must have an external joint tape of dirt, Building rubble and waste as well as residual concrete are cleaned. All of this work can be combined into one Leaks in the construction joint.

The inner joint tape is known for dilatation joints approximately centrally in the front or butt surfaces of the Dilatation joints is laid. Because of the big one The problem here is the depth of penetration, especially with end faces that end there Reinforcement must be carried out to make the Allow the joint tape to enter the building. Especially when laying the inner joint tapes horizontally there is also the risk that the application of the Building material (concrete) the joint tape bent down and can be pushed away and that covered by the joint tape and not below this volume of building material is filled in sufficiently. Both effects can lead to one Lead weakness and / or leak in the joint.

The joint tapes can be used for expansion joints in the middle a longitudinally extending one Have hose profile that deforms the movement of the adjacent building parts.

A sealing tape with integrated injection possibility is E.g. known from WO-A-97/16603. It has one tubular, elastic body with two strip-shaped foothills. These foothills are in same level and have elevations and Toothings to hold the concrete after pouring to increase. Each branch also points to one Broadside, on both foothills on the same Side, an injection channel on. That from these Sealing material emerging from the injection channels flows primarily along the side of the foothills and fills existing gaps between the sealing tape and Concrete. Further injection can cause that Sealant also in the concrete above the side surface penetrates.

One disadvantage of this is that the sealing strip is a Has inside and outside, i.e. depending on Requirements with the injection channels on the one hand or on the other side of the wall. On Violation of this laying instruction can result in a insufficient sealing effect. The seal continues to work by injection, especially against the flow around the Sealing strip along the surface of the foothills.

An object of the present invention is to provide a Joint tape with the option to inject, one offers increased sealing effect through injection.

Such a joint tape is specified in claim 1. The further claims indicate preferred embodiments.

The joint tape is accordingly characterized by at least one strip-shaped extension from the front one Injection device has. The injection device allows to injectables essentially starting from the end face into the surrounding concrete.

For the assessment of the advantages of the invention is too note that so-called "waterproof concrete" then exists when the water transport is below the given Conditions is so small that that's on the inside escaping water can evaporate or evaporate. concrete always represents a capillary system and points from therefore, depending on the version, a more or less large one Ability to transport water. Water transportation takes place therefore not only in the construction joints of the concrete structure, but also spread over the entire concrete, however the construction joints zones are greatly increased at all times Represent water transportability, if not additional Sealing measures are taken.

Taking into account the total water transport are therefore the known joint sealing tapes only have a limited effect, because they have the possibility of injecting sealing material is designed for water transport in the joint and around the joint tape is obstructed. However, it is often the case that the concrete around a construction joint of different structure than in the mass of the cast section, in particular has a higher water transport capacity. Another problematic situation occurs when that Joint tape is laid horizontally and the concrete under the horizontally aligned extensions must flow.

According to the present invention, therefore Injection device arranged so that the joint between joint tape and surrounding concrete through the Injection material is sealed, but especially one Injection takes place in the surrounding concrete and thus that Capillary system is interrupted at depth. You can do this also as a virtual widening of the joint tape in the Look at the concrete. In the further is the Injection device is preferably arranged so that it is in According to the symmetry of the joint tape, so that a distinction between inside and outside is eliminated and thus a risk of failure due to faulty Laying is excluded.

Figur 1

zeigt einen Schnitt durch ein Arbeitsfugenband;

Figur 2

zeigt einen Schnitt durch ein Dilatationsfugenband;

Figur 3

zeigt eine Verwendung des Fugenbandes in einem Eckstoss;

Figur 4

zeigt eine Verwendung des Fugenbandes in einem geraden Stoss; und

Figur 5

zeigt die Verwendung des Dilatationsfugenbandes.

The invention will be further explained using exemplary embodiments with reference to figures.

Figure 1

shows a section through a construction joint tape;

Figure 2

shows a section through a dilatation joint tape;

Figure 3

shows a use of the joint tape in a corner kick;

Figure 4

shows a use of the joint tape in a straight joint; and

Figure 5

shows the use of the dilatation joint tape.

The joint tape 1 (Figure 1) has two extensions 2, 3, the over a more or less pronounced middle part 4 are connected. In extensions 2, 3 there is an injection device 6 each consists essentially of a supply channel 7 for the Injection material, from the outlets 9 to the end faces 10 of extensions 2, 3 go off.

The outlets 9 open into an outer channel 12 into one Cord 14 is inserted from a rubber-elastic material. The outer channel 12 has a depression at its base or groove 15, which is not filled by the sealing cord 14 becomes. This creates a possibility that the injection material evenly over the entire length can distribute the outer channels along the groove 15. Also individual blocked outlets 9 are bridged.

The outer channels 12 have a slot 17 towards the outside through which the injection material runs the entire length can leak. The width of the slot 17 is dimensioned that during the injection the sealing cord 14 regularly is not pressed out of the outer channel 12, but the injection material pushes the sealing cord aside and flows around them. The sealing cord 14 thus acts as one Type check valve at the outlet of the injection device 6.

It is also possible to use two or more Make injection: For this, the injection material is after injection if there is a hardening in the injection system Material is by rinsing out of the injection device away. E.g. can with cement paste (mixture of cement and Water) injected and rinsed with water. On non-rinsable material such as a polymerizable Material usually makes the injection device unusable, so an injection with such Material basically as the last injection step must be provided.

The injection material into the Injection devices can be from the ends of the joint tapes done here or by side Supply lines. These measures are known per se and not shown.

Figure 2 shows a joint tape 20 for use in Dilatation joints. Instead of a massive midsection the dilatation joint tape 20 has a hollow profile 22 rubber-elastic material. The attached to it Processes correspond to those described above Construction joint tape and have the same reference numbers Mistake.

The extensions 2, 3 can improve the hold in Concrete, preferably on the sides, have a profile like the corrugation 24 indicated in FIGS. 1 and 2, which in is approximately sawtooth-shaped. In addition, the The thickness of the extensions 2, 3 towards the outside, causing results in a kind of dovetail toothing with the concrete.

The preferred material for the joint tape is plastic to think, e.g. for the extensions 2, 3 and the middle part 4 of HD-PE, which is relatively stiff, and for the elastic Middle part 22 of LD-PE, the rubber-elastic properties having.

Figure 3 shows the application of the joint tape 1 in the Construction joint 30 between a floor slab 31 and one poured on it wall 32. In the bottom plate 31 and Wall 32, the usual reinforcements 33 are embedded. At the Manufacturing the bottom plate 31 is done before the cover layer 34 is poured, the dilatation joint on the Reinforcing iron 33 provided and optionally additionally fixed by brackets known per se. The width of the Joint tape 1 is chosen so that the middle part 4 approximately at the level of the surface 35 of the base plate 31 located. For this reason too, the middle part 4 two in each case extending in the longitudinal direction on both sides Surveys 36 on that as a lesson for the correct Embedding depth can serve.

Figure 3 also shows the effect of the joint tape 1. By Injecting is done over and under the joint tape around the A region 38 of the capillary system of the Sealed concrete. That according to arrows 40 from the relative leaking joint zone 41 into the wall 32 or base plate 31 entering water must therefore not only be the joint tape 1 itself, but also the sealed areas 38 above and flow under the joint tape 1. Especially this additional blocking effect is effective in the area of Wall foot, where part of the upper extension of the Joint tape 1 is covered by material that is less Has water resistance: on the one hand is the surface a bottom plate 31 often of heavily watered down cement paste covered, which has practically no sealing effect to the bottom of a concrete wall is in many cases through Accumulations of individual, larger aggregate grains characterized, which also causes the tightness is reduced.

The extent of zone 38 is to a large extent from the surrounding one Material and the conditions of injection. The the extent shown is therefore not decisive to watch.

By the possibility of going into the depth of the concrete Injecting, the effect of the joint tape in the Expanded concrete and also with construction joints relatively wide leak zone, as in Figure 3 illustrates the water flows (arrows 40) a narrower Passage and another way imposed and thus the desired tightness guaranteed. By the arrangement the outlets for the injection material on the front of the extensions 2, 3, it is also possible to undertake the injection to carry out increased pressure, since that too Injection material an increased resistance to flow opposed to the joint along the joint tape.

Due to the fact that an injection 38 in Construction concrete is carried out (instead of in a Construction joint), a wasteful pouring out of the Injection resins prevented from a leaky construction joint.

It should also be mentioned that the relatively wide Execution of the joint tape 1 is self-standing, i.e. that after pouring into e.g. a base plate 31 freely after protrudes above the concrete and no other Support measures during the casting of the wall 32 are required.

Figure 4 shows an application of the joint tape 1 in the joint two walls 44. The statements made above Figure 3 also apply to this application. It should be noted nor that when placing the walls 44 according to FIG a base plate 31 according to Figure 3 at the intersection of the Joint 30 between base plate 31 and wall 32, here here Walls 44, and construction joint 45 through the injection zone 38 above the joint tape 1 a seal of the joint between the two joint tapes 1.

The strips at the crossing point are still preferred glued, so an additional seal on this particularly critical point.

Figure 5 finally shows the use of Dilatation joint tape 20. It is with its extensions 2, 3 embedded in a concrete casting 47. The joint between the concrete castings 47 is through insulation material 48 filled on both sides of the joint tape 20. Here too again clear how those created by injection, additionally sealed areas 38 to an increased Resistance to the flow of water (arrows 40) around it Guide joint tape 20 around.

From the above description of the preferred Exemplary embodiments result in a multitude for the person skilled in the art to modifications, without the scope of the invention as in the Defined claims to leave.

Among other things, it is conceivable to join the joint tape with others superficial formations to improve the to provide mechanical anchoring in concrete; the Design injection devices differently, e.g. with a single, central feed channel for the injection material; the outlet area for the injection material (outer channel 12; To shape outlet slot 17) differently or with a to provide a closure other than sealing cords 14, if necessary, also completely towards a closure waive, but there is a risk that the Outlet is blocked when embedding in the concrete; the Joint tape made of other material, especially others To manufacture plastics.

glossary

HD-PE

Polyethylene, high density

LD-PE

Low density polyethylene

Claims (10)

Joint tape (1, 20) for sealing joints, especially construction and dilation joints in concrete construction, characterized in that the joint tape (1, 20) at least two strip-shaped, essentially in Extensions (2, 3) extending in the longitudinal direction of the joint tape has in approximately the opposite direction of protrude from a central area (4, 22) and at least of which one a device (6) for injecting sealing material has, the outlets (17) of the device in essentially on the end face of the extension (2, 3) are arranged to be approximately relative to the extensions symmetrical penetration of the sealing material into the environment, especially the surrounding concrete. Joint tape (1, 20) according to claim 1, characterized characterized that all extensions (2, 3) a Have injection device (6). Joint tape according to one of claims 1 to 2, characterized characterized in that the joint tape (1, 20) in total approximately is strip or ribbon-shaped. Joint tape (1, 20) according to one of claims 1 to 3, characterized in that there are exactly two extensions (2, 3) having. Joint tape (20) according to one of claims 1 to 4, characterized in that the extensions (2, 3) on one compliant dilation element (22) are attached, so that a movement of connected by the joint tape Building parts (47) by deforming the dilatation element is recordable. Joint tape (20) according to claim 5, characterized characterized in that the dilatation element (22) in essentially a hollow profile from resilient, in particular rubber-elastic material. Joint tape (1, 20) according to one of claims 1 to 6, characterized in that it is essentially is mirror symmetric to use without attention to allow from inside and outside of a building. Joint tape according to one of claims 1 to 7, characterized characterized in that the extensions (2, 3) from a relative rigid material, preferably high-density polyethylene (HD-PE), exist and the dilatation element (22) from one rubber-elastic plastic, preferably lower polyethylene Density (LD-PE). Joint tape according to one of claims 1 to 8, characterized characterized in that the injection device (6) a extending in the longitudinal direction of the extension (2, 3) Has outer channel (12), one towards the front Has outlet slot (17) to the exit of the Injection material on the front of the extension (2, 3) to enable. Joint tape (1, 20) according to claim 9, characterized characterized in that the outlet slot (17) has a smaller one Width than the largest width of the outer channel (12) and in the outer channel an essentially cord-shaped, compliant and preferably rubber-elastic sealing element is inserted, which fills the outer channel (12) to a Penetration of liquids or other foreign bodies the outlet slot (17) into the injection device (6) prevent.

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