CZ2010299A3 - Lathing for rendering - Google Patents

Abstract

The reinforcing mesh (1) comprises a supporting mesh (2) of metal or plastic material which is formed by a warp (3) and a weft (4) or a rectangular welded net provided with spacer elements in the form of asymmetric lenses (5) of foamed plastic. preferably polyurethane or polystyrene, provided with an adhesive layer on the reverse side. Each lens (5) exhibits a double-sided construction vault profile which is larger on the back (7) of the reinforcement mesh (1). The cocks (5) in the support web (2) are evenly spaced apart at regular and / or irregular intervals, and can preferably be attached outside their horizontal and vertical centers. The larger portion of the lens (5) on the back (7) of the reinforcing mesh (1) has the surface of the canopy of the back vault profile covered with an adhesive layer (8) for attachment to the building structure (9).

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a reinforcing mesh for reinforcing the surface layers of building structures comprising a supporting mesh provided with spacers in the form of lenses.

BACKGROUND OF THE INVENTION

DE Patent No. 51 158 of 1889 describes a plaster support for ceiling and wall plaster, known to this day as the Stauss mesh by the patent owner. The plaster support consists of a lattice-cut body made of burnt clay, through whose individual diamond-shaped reinforcements a grid-intersecting wire insert is guided. Thus, the Stauss mesh is constructed as a plaster carrier, where the metal net is covered by ceramic bodies so that their center reinforces the intersections of the warp and the weft. By completely covering the mesh, it becomes an armature of these ceramic bodies and therefore has no contact with the plaster. After firing, the ceramic parts become brittle, brittle and the overheated metal mesh loses strength and corrodes when fired at 400-800 ° C. This Stauss mesh serves as a plaster support, not as an element directly reinforcing the plaster. In fact, the plaster does not touch the metal insert during application.

A technical solution from the 1960s is known which replaces the weft of Strauss mesh with plastic rods and replaces the material of the ceramic bodies with one that does not have to be exposed to higher temperatures. A metal warp and plastic weft is cast, passing into cement or concrete bodies. Plastic bars are designed to reduce the cost of a metal mesh. The advantage is the use of plastic instead of metal in the weft mesh. This product does not need to be burned. The disadvantage is that the mesh is heavy, brittle, does not allow directly reinforcing the plaster.

Utility Model No. 1407, 1993, discloses a reinforcement mesh comprising a support mesh carrying spacers of foamed lightweight organic matter, preferably foamed polystyrene. The spacers are spaced apart at regular intervals and, according to the exemplary embodiments, are located predominantly at the intersections of the reinforcement mesh. The spacers have a regular circular shape according to the drawings. The advantage is that the reinforcing mesh is very lightweight with respect to the state of the art and allows relatively simple handling during application. The disadvantage is that the density of the lenses requires a special mortar consistency that allows the mesh to be swapped onto the substrate or plastering in two layers so that the mortar adheres to the substrate. Another disadvantage is copying the unevenness of the plastered foundation structure. Due to the position of the mesh in the center of the lenses, the mortar layer must adhere to the substrate over the mesh and cover the mesh and the lenses.

2 »« a »····» «a» t * * «·« a a «« ** «·· a ·« * »· on the face side. On uneven substrates, the mesh is drawn into the indentation, thereby degrading the strength of the plaster layer and increasing mortar consumption.

The CZ utility model No. 19 930, from 2009, describes a wire reinforcement net, where the spacers are made of novodur. Novodur has diametrically different properties 5 with respect to the lime plasters to be reinforced. Climate change, ie temperature and humidity, is likely to result in different dilatations between the novodur and the lime plaster, thereby cracking the plaster surface.

The CZ Utility Model No. 20 515, dated 2009, describes a building reinforcement net, which is formed by a wire mesh, where the mesh at the joints is provided with spacers 10 made of thermoplastic. According to the drawing, the mesh is oriented diagonally. It can be assumed that this mesh is unsuitable from the point of view of the technical solution for this purpose, because the spacers are made of thermoplastic, which is unsuitable for natural mineral plasters due to its properties. Furthermore, situating the mesh diagonally will likely impair the reinforcing function in the plaster.

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CZ UV 5814 discloses a plaster substrate comprising a support element, which may be a mesh or glass, fabric or wire mesh, which is connected to a bottom substrate element which is made in the form of a board, namely a wood board or foamed plastic, which may be recycled polystyrene. Spacers in the form of foamed plastic bodies, preferably spaced apart at regular intervals, are disposed on the support element. The spacers are rigidly connected to the backing element and may be foamed into it. The spacers may be in the form of lenses bulging on both sides.

This solution necessarily contains an additional element for the plaster. In the exemplary embodiments, it is stated that a support element with spacers, eg a wire mesh with foamed lenses, is fastened to the base element, eg in the form of a polystyrene or wood board, mostly by mechanical means, eg nails, staples or spacers matter.

The solution is designed for plastering ceilings, walls, floors, profiled substrates, walls made of wood, wood-cement boards, using plaster made of natural materials such as cement, sand, lime etc. Demanding renovation works, reconstructions and complex repairs of damaged surfaces are also possible The walls are also suitable for additional thermal insulation of buildings and their thermal insulation.

Spacers, for example of foamed material with a convex arch on both sides, according to the exemplary embodiments, are in themselves spatially symmetrical, in all their three principal axes x, y, z and e. Spacers of, for example, foamed material are also placed symmetrically in their geometrical center, i.e. in the center of their x, y, z axes, i.e. in their longitudinal direction, in the support element, e.g. vertical axis. Thus, it is a symmetrical spacer element symmetrically positioned in the support element. This symmetry of the spacer elements has the advantage of being easy to manufacture and of undemanding technology. Thus, there is no problem of the orientation of the spacers in the support element, during assembly, since both sides of the spacers are equally convex on both sides of the support element. When applying plaster mixtures on this support element with spacers, it is necessary to take into account that the applied material must penetrate as much as possible into the entire space between the support element with spacers and the base element - plate. If this condition is not respected, ie the complete filling of this space with the plaster, the area in which the applied layer is joined to the base element and thus the holding force is smaller.

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The system has limited applications and can be realized mainly in cases of confined spaces where it is not possible to work with a support element with spacers, eg a mesh with foamed lenses, wound in long strips. Applications can only be used in hard-to-reach or articulated areas of buildings, with complicated access to the placement area. A further disadvantage is that if the realized area consists of a plurality of base plates, a plurality of contact surfaces - lines - are formed thereon, in which the wire mesh does not connect with the spacer elements in adjacent plates. In these contact areas, cracks may occur over time due to small movements of the building structure, eg when settling the building or changing moisture, xm is determined ^.

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SUMMARY OF THE INVENTION

These disadvantages are avoided or substantially reduced in the reinforcing mesh according to the invention. It is an object of the present invention that the support mesh of metal or plastic material consists of a warp and weft or a rectangular welded mesh, and is provided with spacers in the form of foamed plastic lenses. The lenses are provided with an adhesive layer on the reverse side for attachment to the building structure.

The main advantage of the present invention is its versatility for all known building materials and opaque building structures. The reinforcement network is investment-intensive. It is easy, fast, safe and convenient for most surface remediation>

facades and walls of damp buildings. The reinforcement mesh has greater contact with the plaster, thereby increasing its reinforcing ability. The carrier mesh in a rectangular design exhibits a very good reinforcing ability and strength in the direction of stress of the reinforcing mesh due to gravity of plaster weight. Lenses made of foamed plastic lighten the reinforcement mesh.

Each lens has, in vertical section, a double-sided structural arch profile, which is larger on the back of the reinforcing mesh facing the structure. The arch profile of the lenses contributes to increasing the compressive strength of the reinforced plaster. This creates a sufficient distance between the supporting mesh and the building structure.

The lenses in the carrier mesh are evenly distributed over the surface, at regular or irregular intervals. The uniform distribution of the lenses in the supporting mesh ensures better parameters of the reinforcement mesh itself, eg it creates a reinforcing layer at the same distance from the building structure. In the event of uneven distribution, local faults may occur.

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The lenses are asymmetrical in shape, they may advantageously be attached to their carrier mesh outside their horizontal center and / or vertical center. Their larger part is situated on the reverse side of the reinforcement mesh, whereby the reinforcement mesh is kept at an optimal distance from the plaster face.

The larger part of the lens on the back of the reinforcement mesh has the top surface of the back arch profile covered with an adhesive layer for attachment to the building structure. The adhesive layer facilitates the assembly of the reinforcement mesh before mechanical anchoring.

The adhesive layer may be formed of a water-based adhesive to prevent damage to the organic lens material.

The adhesive may be elastic, which allows the reinforcement mesh to be re-adhered, or the elastic adhesive may be applied in advance of the reinforcement mesh assembly and application.

The adhesive may be cement-based, so that it does not have to be applied to the lens, but directly to the building structure, whereby the adhesive pads are formed after application to the building structure.

Lenses made of foamed polyurethane or polystyrene represent an available material for making the reinforcement mesh.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is described in detail in the accompanying schematic drawings, in which FIG. 1 is a top view of the reinforcement mesh; FIG. 2 is a vertical section AA of the reinforcement mesh of FIG. and FIG. 4 is a horizontal cross-sectional view of a reinforcing mesh applied to a structural profile.

DETAILED DESCRIPTION OF THE INVENTION

The reinforcement mesh 1 is shown in a top view of FIG. 1. The reinforcement mesh 1 is made of a supporting mesh 2, namely a wire mesh with an anti-corrosion treatment. The mesh 2 consists of a warp 3 and a weft 4 in a rectangular configuration. The supporting mesh 2 is formed of a wire of eg 0.8 mm diameter and a mesh size of 12.5 mm x 12.5 mm. The supporting mesh 2 can also be formed as a rectangular welded mesh of metal wires. A tough plastic can also be used as a carrier mesh.

Expanded plastic lenses 5, for example foamed polystyrene or polyurethane foam, are foamed into the carrier mesh 2. The lenses 5 are evenly distributed in the carrier mesh 2, but need not be at the same axial distance. In particular

The lenses 5 have a shorter distance in the direction of the weft 4 and a longer distance in the direction of the warp 4.

In Fig. 2, this reinforcement mesh is shown in section A-A of Fig. 1 in vertical section. In this vertical section, the lenses 5 and their particular exemplary placement in the support mesh 2 are shown. The section shows the vertical placement of the support mesh 2 in the lenses 5, towards the face 6 and to the reverse 7 of the reinforcing mesh 1. In section AA, lenses 5 in section and lenses 5 in view are alternated. The face 6 of the reinforcing mesh 1 represents its outer side. The back 7 of the reinforcement mesh 7 represents the side that faces the building structure 9 when applied. This figure shows the asymmetrical shape of the lenses 5 having a double-sided structural arch profile. From the front side, this profile is lower in height and has a larger arch radius. On the reverse side, the structural arch profile is higher in height, with a smaller arch radius. Thus, a portion of the lens 5 on the back of the reinforcing mesh 1 has a larger portion of the lens 5 by volume.

The lenses 5 are mounted in the carrier mesh 2 outside their horizontal and vertical center.

The bulk of the lens 5 on the reverse side 7 of the reinforcement mesh 1 has the top surface of the reverse arch profile covered with an adhesive layer 8 which, when applied, serves to adhere the reinforcement mesh 1 to the building structure. Adhesive layer 8 forms adhesive, which may be a water-dispersible adhesive or an acrylic water-dilutable adhesive, or a hot melt adhesive such as polyethylene or cement adhesive, gypsum adhesive, or adhesive mortars, screeds and sealants may also be used as adhesives. The adhesive can be applied just before the reinforcement mesh is applied. The elastic adhesive is still elastic, which is important when the reinforcement mesh is applied. The adhesive layer 8 is particularly important in the application, since it facilitates handling of the reinforcing mesh 1 and acts as a temporary fixative.

In order to avoid deflection of the reinforcement mesh 1 during assembly, it is advisable to place it off the center of the lenses 5. The more convex portion of the lens 5 is provided with an adhesive layer 8 and is applied to the substrate, plaster 10. the surface of the building structure 9. After anchoring the reinforcement net 1 of the net and pouring it with eg mortar, the unevenness of the base is filled. The reinforcement mesh 1 in the foamed plastic lenses 5 is eccentrically positioned to move it away from the substrate and keep it below the surface of the core plaster 10. The stucco layer can then be of almost the same thickness over the entire surface. By providing a reinforcing layer at the same distance from the face of the plaster 10, the reinforcement mesh 1 functions correctly. The position and shape of the lenses 5 affects the correct function of the facade layer with respect to the reinforcement mesh distance 1. maturation from lime-cement mortars, thermal reduction

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the permeability of the plaster layer. Placing the lenses 5 so that they cover uniform areas and do not form distinct rows allows easy mortar swapping and does not form strips of different strength.

The application of the reinforcement mesh 1 is shown in Figures 3 and 4 for two different specific embodiments.

Fig. 3 shows the application of the reinforcement mesh 1 to an uneven substrate with a flat plaster surface. The application is shown in horizontal section through the building strata. On an uneven building structure 9, represented, for example, by an uneven masonry, the reinforcement mesh 1 is attached so that it has a flatness on its face 6. The fixing of the reinforcement mesh 1 to the building structure 9 is carried out by means of an adhesive layer 8, which is functional at the points of contact of the lenses 5 with the building structure 9. This is followed by conventional mechanical anchoring, which can be carried out e.g. Subsequently, the reinforcing mesh 1 is swapped with a plaster 10, eg lime-cement, above the tangents of the facing side of the reinforcing mesh 1. This swapping with the plaster 10 is carried out in a conventional manner so that the plaster 10 attaches to the reinforcing mesh 1 and between them, and that the reinforcement mesh 1 is overlapped to form a reinforcing element. Finally, after the core plaster 10 has been matured, lime stucco 11 is leveled. Thus, the lime stucco 11 forms a planar final facade layer.

Another alternative application of a particular exemplary embodiment is shown in Fig. 4, showing a horizontal section when applying the reinforcement mesh 1 to the building structure 9, e.g. profile. The structural profile has a rounded surface. A reinforcing mesh 1 is applied to this rounded surface so as to be in contact with it on the back 7 and in the adhesive layers 9 of the lenses, to the maximum extent possible. Subsequently, mechanical securing of the reinforcement mesh 1 to the structural profile is carried out by conventional anchoring means (not shown) so that the face 6 of the reinforcement mesh 1 does not copy the unevenness of the structural profile and that the face 6 of the reinforcement mesh 1 is not deformed, i.e. flat. In order to achieve this, it is not necessary to use all of the adhesive layers on the back 7 of the reinforcing mesh 1. The reinforcing mesh 1 thus prepared is swapped with a plaster 10, for example a cement plaster or gypsum plaster or adhesive mortar as required. The finishing is carried out by applying a thin layer of stucco 11, eg gypsum, mineral layer, paste layer, etc. Alternatively, the surface may be coated on or instead of the stucco plaster, lined with wood, ceramics, tiles, etc.

The application of the reinforcement mesh 1 according to the invention results in a building stack in which the lenses 5 act as a structural element. The lenses 5 reduce the weight of the plaster layer. The lenses 5 further compensate for the expansion differences between the various building materials used, in the event of changes in temperature, humidity, etc. Further, the lenses 5 form

the distance gap between the supporting mesh 2 of the reinforcement mesh 1 and the building structure 9 and the building structure profile. The lenses 5, due to the low thermal transmittance coefficient, increase the thermal insulating ability of the building stack.

The support mesh 2 achieves maximum reinforcing efficiency in the plaster 10 with respect to the optimal arrangement of the lenses 5.

Industrial applicability

The solution is designed for building industry, especially for the rehabilitation of the surface of both ordinary buildings and historical and prefabricated panels, for use in interiors and exterior facades. Furthermore, the solution is suitable for thermal insulation of buildings.

Tensile reinforcing mesh 1: supporting mesh; warp 3 reinforcement mesh 1 weft 4 li lens

face 6 Reinforcement mesh 1 rub

reinforcing nets 1 cutting layer 8 on the lens 5 of the plaster frame structure

Claims (7)

PATENT CLAIMS PV 2010-299 A reinforcement mesh for reinforcing the surface layers of building structures (9), comprising a supporting mesh (2) of metallic or plastic material, comprising a warp (3) and a weft (4) or a rectangular welded mesh, intersections of which spacers are arranged. in the form of lenses (5) which are uniformly spaced from one another at regular and / or irregular intervals, characterized in that spacers are placed on the support mesh (2), at the intersections of the warp (3) and the peak (4) or welded mesh the lens-shaped elements (5) of foamed plastic are provided with an adhesive layer (8) on the back (7), where the lenses (5) have a double - sided structural arch profile in vertical section, wherein - each lens (5) has, in vertical section, a structural arch profile larger on the back (7) of the reinforcement mesh (1) facing the building structure (9) when applied. A reinforcement mesh according to claim 1, characterized in that the lenses (5) are mounted in the carrier mesh (2) outside their horizontal center and / or outside their vertical center. Reinforcing mesh according to claim 1, characterized in that the bulk of the lens (5) on the back (7) of the reinforcing screen (1) has the surface of the back arch canopy covered with an adhesive layer (8) for attachment to the building structure (9). . The reinforcement mesh according to claim 3, characterized in that the adhesive layer (8) is formed from a water-dilutable adhesive. 5. The reinforcing mesh of claim 4, wherein the adhesive is elastic. 6. The reinforcement mesh of claim 3, wherein the adhesive is cement-based. The reinforcement mesh according to claim 1, characterized in that the foamed plastic for the lens (5) is polyurethane or polystyrene.