DE102021134257A1 - Improved reinforcement fabric and method of using same - Google Patents

Abstract

The invention relates to the field of facade design. More precisely, the invention relates to an improved reinforcement fabric for facades and a method for its use. The reinforcement fabric in web form for building facades comprises a flexible material suitable for absorbing tensile stresses with an outer side and an inner side, intended for inner-side, web-wise attachment to a level substrate (3), individual webs (1, 2) of the reinforcing fabric overlapping at edge regions (4, 5) extending in the longitudinal direction. It is characterized in that the outside of a web (1, 2) of the reinforcing fabric has a recess running in the direction of the inside along a longitudinally extending edge region (4, 5) intended for overlapping.The method for reinforcing a building facade using a reinforcement fabric takes place by applying a first web (1) of the reinforcement fabric to the inside of a substrate (3), after which this substrate (3) is pressed in underneath the first edge area (4) and the first edge area (4) is sunk into it, and wherein then another web (2) is placed with its second edge area (5) without a recess overlapping the first edge area (4) of the first web (1) and applied to the substrate (3), so that the outer sides of both webs ( 1, 2) form a substantially flat surface.

Description

Introduction

The invention relates to the field of facade design. More specifically, the invention relates to an improved reinforcement fabric for facades and a method of using it.

State of the art and disadvantages

Reinforcement mesh, also known as plaster reinforcement, is used to reinforce plaster layers against cracks. It usually consists of a single-layer, grid-like, tear-resistant and durable network structure. The fabric is typically supplied in the form of webs wound into rolls and cut into sections of appropriate length on site, i.e. at the construction site.

The aim of the reinforcement fabric is to prevent cracking in a plaster covering the fabric by absorbing tensile stresses that occur during drying or as a result of temperature fluctuations instead of the brittle plaster. In this case, it is necessary for adjacent tracks to overlap sufficiently, for example 10 cm, in order to be able to transmit stresses absorbed within one track to neighboring tracks; in the case of strips that only butt together, the plaster could tear in the area of this butt joint.

A typical application is the production of an exterior plaster layer on top of a base coat or insulation layer, which is typically compliant.

However, the overall thickness of the reinforcement also increases due to the overlapping of the reinforcement strips in the overlapping areas. A subsequent layer of plaster, applied with the same thickness, shows this increase in thickness if no countermeasures are taken. By applying a significantly thicker layer of plaster, which is then only correspondingly thinner in the overlapping areas, the optically undesirable effect can be concealed; However, the use of thicker layers of plaster is correspondingly more expensive and may also be technically disadvantageous (drying time, weight, ...).

Object of the invention and solution

The invention is therefore based on the object of providing a reinforcement fabric which avoids the disadvantages of the prior art.

The reinforcement fabric is intended to avoid the optically disadvantageous effect of overlapping strips without having to apply thicker layers of plaster.

The object is achieved by a reinforcement fabric according to claim 1, a method for use according to independent claims 8 and claim 9, and a web of reinforcement fabric according to claim 10. Advantageous embodiments can be found in the dependent subclaims, the following description and the figures.

Description

The invention relates to a reinforcing fabric in web form for building facades. This means that the reinforcement fabric is designed as a web that is typically offered in roll form and unrolled on site and made up to the desired length. The width of such a web is, for example, 100 cm or 110 cm. The length can be several 10 meters.

The reinforcement fabric comprises a hard-wearing, flexible material suitable for absorbing tensile stresses, such as fiberglass. It can be in the form of a net with a mesh size of e.g. 4x4 mm. The reinforcement fabric has an outside and an inside; the inside points to the facade (or to the subsoil), the outside points away from the facade (or to the subsoil). The reinforcement fabric is intended for inner-side, strip-wise attachment to a level substrate in order to avoid the formation of cracks in a plaster that can be applied to the reinforcement fabric on the outside. For this purpose, it is provided that individual webs of the reinforcement fabric overlap at the edge regions extending in the longitudinal direction of the web and are connected to one another and to the substrate. The connection is made by applying to or embedding in a plaster, which subsequently hardens.

The reinforcement fabric according to the invention is characterized in that the outside of a web of the reinforcement fabric has a recess offset in the direction of the inside along an edge region which extends in the longitudinal direction and is intended for overlapping. The term "recess" here means that the outer surface of the edge area is lower than the remaining outer surface of the reinforcement fabric, where "lower" is defined from the perspective of a person looking on the outside, i.e. said lower (offset) surface is from the person further away than the rest of the surface. The recess has, for example, a depth of a few, e.g. 3, millimeters.

The invention thus avoids the disadvantages known from the prior art. Due to the recess of the edge area according to the invention, it is possible for an adjacent web whose edge area (designed in the simplest case according to the prior art, i.e. of the same thickness and level, i.e. free of recesses) overlaps the edge area (designed according to the invention) of the first web, and thus with of the first panel forms a substantially planar outer surface. Thus, when covered with a layer of plaster of uniform thickness, this surface formed from the outer sides of the webs will result in the outer side of the layer of plaster also being present as an essentially flat surface. The optically disadvantageous effect known from the state of the art is effectively avoided - despite a uniformly thick layer of plaster.

Various embodiments of the invention are described in more detail below.

According to a first variant, the reinforcement fabric is of the same thickness and has a thickness of e.g. 2, 3, 4 or 5 mm. The setback according to the invention is provided by a first crease extending in the longitudinal direction and pointing in the direction of the inside, and a second crease also extending in the longitudinal direction, lying along the surface closer to an outer edge of the reinforcing fabric and pointing in the direction of this outer edge. This means that - from the point of view of a person looking at the outside of a sheet of reinforcement fabric - the edge area is lower than the remaining area of the outside of a sheet; it is offset or lowered toward the inside. At the same time--from the point of view of a person now looking at the inside of a sheet of reinforcing fabric--the edge area is higher than the remaining area of the inside of the sheet. "Along the surface" means that the distance is not measured as the crow flies, but by covering the distance exclusively on this surface. The terms "lower" and "higher" are particularly applicable when the reinforcement mesh is spread out on a horizontal surface. Otherwise, "lower" means "farther from the person," and "higher" means "closer to the person."

It is clear that the outer sides of both webs can only form an essentially flat surface if the edge area with a recess can itself be sunk appropriately deep into the subsoil underneath. In most cases, however, it is easy to provide a corresponding depression, as will be explained further below.

The advantage of this variant lies in the particularly simple provision of the reinforcement fabric in web form. The introduction of the recess can be achieved, for example, by two-stage mechanical buckling, preferably with the aid of heat; even a subsequent introduction of the recess on site is possible with suitable mechanical aids. However, the recess can also be produced during production using suitable molds.

According to one embodiment of this variant, the distance between the first kink and the second kink corresponds to the thickness of the reinforcing fabric, or it is slightly larger. The distance between the first and second bend defines the depth of the recess. If this is not smaller than the thickness of the reinforcement fabric, its (unmodified) edge area can be accommodated by the “recess” thus provided. This ensures that a flat surface (on the outside) can actually form due to edge regions overlapping one another.

According to another variant, the reinforcement fabric has a reduced thickness in its edge region intended for overlapping. The setback according to the invention is defined by a first longitudinally extending and inwardly directed bend, also present only on the outside, and a second, also only externally extending, also longitudinally extending but along the surface closer to a Outer edge of the reinforcement fabric lying and provided in the direction of this outer edge pointing second kink. In other words, the reinforcement fabric has a reduced thickness (an offset) in the edge area, which is provided by the fact that the outer surface of the edge area is lower than the rest of the outer surface of the reinforcement fabric, but that the inner surface of this edge area and the rest of the inner surface of the web lie in a common plane. It should be noted that a further, opposite edge area can possibly be excluded from this, as will be explained further below.

The advantage of this variant lies in the fact that it is no longer necessary to make a depression in the subsoil below the edge area. This embodiment can be used even with a very hard substrate (e.g. concrete), in which case a substantially flat surface can still be provided by the outer sides of the webs with their edge regions overlapping.

According to one embodiment, only one of the two edge areas of a web has a recess. This is particularly advantageous with regard to the first variant described above, since here only one of the two edge regions of a web requires the modification according to the invention; this interacts in a manner according to the invention with the (unmodified) other edge area of an adjacent web.

According to another embodiment, the edge area of a web of reinforcing fabric lying on the opposite edge of the web has the mirrored shape of the first edge area. "Mirrored" means that the widths of the edge areas are identical, but that one of the edge areas is designed as a recess behind the surface of the outside, and the other edge area is designed as a recess behind the surface of the inside of the web. By overlapping these two edge areas (the edge areas mentioned not belonging to the same sheet but to adjacent sheets) it is advantageously ensured that both the surfaces of the outer sides and the inner sides of adjacent sheets lie in the same plane.

According to one embodiment, the sum of the amount of a first kink angle and the amount of a second kink angle is 180 degrees. By "crease angle" is meant the angle measured in a profile view of a web between the outside and the area between the first and second creases on the one hand, and between that area and the outward-facing surface of the edge portion. If the sum of both angles is 180, this means that the outwardly facing surface of the marginal area is parallel to the remaining surface of the web.

In the event that the return is arranged on the inside of the track, what has been said applies in an analogous manner.

The kink angles can be +/- 90 degrees, or e.g. +70 degrees and -110 degrees, or +80 degrees and -100 degrees (a positive value results from a clockwise measurement and vice versa). In the first example, the recess is flatter, in the second case an undercut is formed. The second edge area of the adjoining web that interacts with such an edge area is preferably adapted to its shape.

The invention also relates to a method for reinforcing a building facade using a reinforcing fabric as defined above, according to which the reinforcing fabric is of the same thickness.

Accordingly, a first web of the reinforcement fabric is initially applied to a substrate on the inside, for example by laying it on a base coat that is still damp. Thereafter, this substrate is pressed in below the first edge area according to the thickness of the reinforcement fabric. This is easily possible when the base coat is still damp; Many insulating materials can also be plastically deformed by a few millimeters with little force, so that a recess is formed in which the edge area formed by the recess can be sunk. A further web is then placed with its second edge area, which in this case has no recess, so that it overlaps the first edge area of the first web. Since this second web has no recess at the relevant edge facing the first web and therefore an explicit edge area of the same is not geometrically defined, an area whose width corresponds to the width of the recess of the edge area of the first web is simply selected as the second edge area and made to overlap. At the same time, the rest of the inside of this strip is also applied to the subsurface, with the subsurface underneath not being deepened. Thus, the outer sides of both webs form a substantially flat surface, which leads to the uniform outer side of adjacent webs of reinforcing fabric desired according to the invention.

The method using a reinforcement fabric according to the above definition, according to which a web has two edge regions with mutually mirrored recesses, provides that initially a first web of the reinforcement fabric is also applied to the inside of a substrate, with a further web then being attached with its second, the said edge area having a mirrored return is placed overlapping on the first edge area of the first web and at the same time applied to the substrate. In other words, the first edge region bearing a return in the outside of a first web is overlapped with the second edge region bearing a return in the inside of an adjacent second web. Since both edge areas preferably have the same width, one edge area "fits" into the other, so that both the insides and the outsides of both webs again form a substantially flat surface. Reference is made to the advantages of these embodiments that have already been explained above.

The reinforcement fabric described is particularly preferably in web form and has an inside, an outside, a first edge area and a second edge area. to ver To avoid repetition, reference is made to the explanations above.

character list

• 1 einen Querschnitt durch zwei überlappende Bahnen eines Armierungsgewebes aus dem Stand der Technik;
• 2 einen Querschnitt durch ein erfindungsgemäßes Armierungsgewebe einer ersten Ausführungsform;
• 3 einen Querschnitt durch ein erfindungsgemäßes Armierungsgewebe einer zweiten Ausführungsform;
• 4 eine exemplarische Darstellung des ersten und zweiten Knickwinkels.

The invention is explained below by way of example using figures that are not to scale. while showing

• 1 a cross section through two overlapping webs of a reinforcement fabric from the prior art;
• 2 a cross section through an inventive reinforcement fabric of a first embodiment;
• 3 a cross section through an inventive reinforcement fabric of a second embodiment;
• 4 an exemplary representation of the first and second bending angle.

In the 1 1 shows a cross section through two overlapping webs 1, 2 of a reinforcement fabric from the prior art, which is arranged on a substrate 3. FIG. The respective outer side (without reference number) of the web 1, 2 points upwards in the figure, and the inner side downwards, in the direction of the substrate 3.

The two illustrated webs 1, 2 of the reinforcing fabric overlap in longitudinally extending edge regions 4, 5 (perpendicular to the plane of the drawing). 1 As can be seen, the outside of the second web 2 in the area of its edge region 5 protrudes significantly beyond the outside of the first web 1 . The result is an uneven surface on the common outside. In order to compensate for this unevenness, a correspondingly thick layer of exterior plaster would be necessary (not shown).

In 2 a cross section through a reinforcing fabric according to the invention of a first embodiment is shown.

The first edge area 4 of the first web 1 has a recess 6 . This recess 6 runs in the direction of the inside and thus in the direction of the substrate 3. The reinforcement fabric is of the same thickness. The recess 6 is brought closer by a first bend 7 extending longitudinally (into and out of the plane of the image) and pointing in the direction of the inside (downward in the image), and a second bend 7 also extending longitudinally a second bend 9 lying on an outer edge 8 of the reinforcement fabric and pointing in the direction of this outer edge 8 . The distance t between the first bend 7 and the second bend 9 corresponds approximately to the thickness d of the reinforcing fabric; it defines the depth of the recess 6.

The second edge region 5 of the second web 2 is flat and has no recess. So that the outer sides of the two sheets 1, 2 can nevertheless form a flat surface, the base 3 has a depression 10 in which the edge region 4 of the sheet 1 can be accommodated. If the substrate 6 consists of a soft, (still) plastically deformable material (e.g. moist base coat, insulation material), then this recess 10 can be produced mechanically/manually in a simple manner where it is required, by pressing it in.

In 3 a cross section through a reinforcement fabric according to the invention of another embodiment is shown.

According to this embodiment, the reinforcing fabric of thickness d has a reduced thickness d' in its edge region 4 provided for overlapping. The recess 6 is defined by a first bend 7, now only present on the outside, extending in the longitudinal direction (into or out of the image plane) and pointing in the direction of the inside (downward in the image), and a second, also provided only on the outside, also extending in the longitudinal direction, lying along the surface closer to an outer edge 8 of the reinforcement fabric and pointing in the direction of this outer edge 8 second kink 9 . The edge area 5 of the adjacent web 2 is mirrored point-symmetrically to the first edge area 4 of the first web 1 . The two edge regions 4, 5 can thus overlap, so that the desired flat, common outside results again, with the depression described above not being required according to this embodiment. This embodiment is therefore particularly suitable for hard substrates 3 which are not sufficiently plastically deformable.

What is not shown is that an edge area 5 of one and the same web 1, 2 lying on the opposite edge of the web also has the (point-symmetrically) mirrored shape of the first edge area 4. Thus, more than two webs can be placed side by side and overlapped in a manner according to the invention.

What both illustrated embodiments have in common is that the sum of the absolute value of a first bending angle α and the absolute value of a second bending angle β is 180 degrees. This is exemplary 4 removed, in which only the edge region 4 of the first web 1 is shown for reasons of clarity. The first bend is (measured clockwise) +90°, the second kink angle is (measured counterclockwise) -90°. Accordingly, the two outer sides of the web 1 pointing upwards in the figure run parallel to one another.

Alternatively and not shown are kink angles which have a value other than +/-90°; Such angles are also possible, it being clear that the outer edge of the edge area of the adjoining web can then be configured in accordance with the shape of the first edge area of the other web.

It is also clear that all the figures shown are only schematic sketches, which means in particular that all of the sharply drawn angles in the figures can actually also be rounded without departing from the inventive concept.

Reference List

1

lane, first lane

2

track, second track

3

underground

4

Edge area, first edge area

5

edge area, second edge area

6

return

7

Kink, first kink

8th

outer edge

9

Kink, second kink

10

deepening

t

Distance

i.e

thickness

a

first kink angle

β

second kink angle

Claims (10)

Reinforcement fabric in web form for building facades, comprising a hard-wearing, pliable material suitable for absorbing tensile stresses, with an outside and an inside, intended for installation on the inside, in webs, on a level substrate (3) in order to avoid cracks in a plaster that can be applied to the outside of the reinforcement fabric, Individual webs (1, 2) of the reinforcement fabric overlap at edge regions (4, 5) extending in the longitudinal direction, characterized in that the outside of a web (1) of the reinforcement fabric is laid along an edge region (4 ) has a recess (6) offset towards the inside. reinforcement fabric claim 1 , the reinforcement fabric being of equal thickness, and the return (6) formed by a first longitudinally extending crease (7) pointing towards the inside, and a second also longitudinally extending crease (7) along the surface closer to an outer edge (8) of the reinforcement fabric lying and pointing in the direction of this outer edge (8) second kink (9). reinforcement fabric claim 2 , wherein the distance (t) between the first bend (7) and the second bend (9) corresponds to the thickness (d) of the reinforcing fabric. reinforcement fabric claim 1 , whereby this has a reduced thickness (d`) in its edge region (4) intended for overlapping, and the recess (6) is formed by a first bend (7 ), and a second bend (9), also present only on the outside, also extending in the longitudinal direction, lying along the surface closer to an outer edge (8) of the reinforcement fabric and pointing in the direction of this outer edge (8). Reinforcement fabric according to one of the preceding claims, wherein only one edge region (4) has a recess (6). reinforcement fabric claim 4 , wherein an edge region (5) lying on the opposite web edge has the mirrored shape of the first edge region (4) with point symmetry. Reinforcement fabric according to one of claims 2 until 6 , wherein the sum of the amount of a first kink angle (α) and the amount of a second kink angle (β) is 180 degrees. Method of reinforcing a building facade using a reinforcing fabric as defined in any of claims 2 or 3 , whereby first a first sheet (1) of the reinforcement fabric is applied to the inside of a base (3), after which this base (3) is pressed in below the first edge area (4) according to the thickness (d) of the reinforcement fabric and the first edge area (4) is sunk into it, and wherein a further web (2) is then placed with its second edge area (5) without a recess overlapping the first edge area (4) of the first web (1) and on the bottom base (3) is applied so that the outer sides of both webs (1, 2) form a substantially flat surface. Method of reinforcing a building facade using a reinforcing fabric as defined in claim 6 , wherein first a first sheet (1) of the reinforcement fabric is applied to the inside on a substrate (3), and then a further sheet (2) with its second edge area (5) having a mirrored recess (6) on the first edge area ( 4) the first web (1) is placed in an overlapping manner and applied to the substrate (3) so that both the insides and the outsides of both webs (1, 2) form a substantially flat surface. Reinforcement fabric according to one of Claims 1 until 7 , This being present as a web (1, 2) with an inside, an outside, a first edge area (4) and a second edge area (5).

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