WO2011127876A2

WO2011127876A2 - Reinforcement netting

Info

Publication number: WO2011127876A2
Application number: PCT/CZ2011/000038
Authority: WO
Inventors: Aloi PALACKÝ
Original assignee: Ecoraw, S.R.O.
Priority date: 2010-04-16
Filing date: 2011-04-18
Publication date: 2011-10-20
Also published as: WO2011127876A3; CZ2010299A3; CZ302769B6

Abstract

On the load-bearing mesh (2), in the intersection points of the warp (3) and the weft (4) or the welded net, the located distance elements in the shape of lenses (5), favourably from foamed plastic material, are provided on the rear side (7) with an adhesion layer (8). In the vertical cut, the lenses (5) demonstrate a double-sided structural vault profile. In the vertical cut, each lens (5) has a bigger structural vault profile on the rear side 7) of the reinforcement netting (1) facing the building structure (9) during the application. The lenses (5) are attached in the load-bearing mesh (2) outside of their horizontal centre and/or outside of their vertical centre. A bigger part of the lens (5) in terms of volume on the rear side (7) of the reinforcement netting (1 ) has the surface of calotte of the back vault profile covered with an adhesion layer (8) for attachment on the building structure (9), favourably made of the adhesive that can be diluted with water or the elastic adhesive or, as the case may be, the adhesive on the cement basis.

Description

Reinforcement Netting

Technical Field

The invention concerns the reinforcement netting for armouring surface layers of building structures including load-bearing mesh, provided with distance elements in the form of lenses. Background of the Invention

The DE patent No. 51 158 from the year of 1889 describes the carrier of the plaster for ceiling and wall plaster, which has been known according to the owner of the patent as Stauss mesh. The carrier of the plaster consists of the grid broken body from burnt clay, through the individual diamond-shaped reinforcements of which a grid- crossed wire insert is placed. Therefore, the Stauss mesh is designed as the carrier of the plaster, when the metal netting is covered with ceramic bodies so that their centre reinforces the intersections of the warp and the weft. As the netting is fully covered, it becomes the armature of such ceramic bodies and, therefore, it has no contact with the plaster. After burning, the ceramic parts become brittle, break and overheated metal netting looses strength and corrodes in case of burning to 400-800 °C. This Stauss mesh is used as the carrier of the plaster, not as the element directly armouring the plaster. In fact, the plaster is not in contact with the metal insert during the application.

A technical solution from the sixties of the last century is known, which replaces the weft of the Strauss mesh with plastic rods and replaces the material of ceramic bodies with such material that need not be exposed to a higher temperature. The metal warp and the plastic weft are cast in and penetrate the cement or concrete bodies. Plastic rods should reduce the costs of the metal netting. The advantage is the application of the plastic material instead of the metal in the weft of the mesh. This product need not get burned. The disadvantage is that the mesh is heavy, brittle and it does not enable armouring the plaster directly.

The CZ applied design No. 1407 from the year of 1993 describes the reinforcement netting, including the load-bearing mesh, carrying the distance elements from foamed lightened organic material with the advantage from foam polystyrene. Distance elements are located apart with regular pitches and pursuant to the design examples they are located primarily in the intersection points of the netting. According to the drawings, the distance elements have regular circular shape. The advantage is t at the reinforcement netting is, with respect to the current technical conditions, very lightweight and enables considerably very simple handling during the application. The disadvantage is that the density of lenses requires special consistence of the mortar, which enables throwing on the base through the netting, or plastering in two layers so that the mortar is bonded to the base. Another disadvantage is copying the uneven places of the plastered base of the building structure. With respect to the location of the netting in the centre of the lenses, the mortar layer shall be bonded through the netting to the base and cover both the netting and the lenses on the face side. It happens on uneven bases that the netting is pulled into the recess, whereby strength of the plaster layer is impaired and consumption of mortar is increased.

The CZ applied design No. 19 930 from the year of 2009 describes wire armouring netting, where the distance elements are made of Novodur. Novodur has diametrically different properties with respect to lime plasters, for the armouring of which it is designed. A change in climate, i.e. temperature and humidity, will probably result in different dilatations between Novodur and the lime plaster and, therefore, in cracking of the plaster surface.

The CZ applied design No. 20 515 from the year of 2009 describes the construction armouring netting, which consists of wire mesh, where the mesh is provided, in the place of connections, with distance elements made of a thermoplastic material. Pursuant to the drawing, the netting is oriented diagonally. It can be expected that this mesh is not suitable for that particular purpose with respect to the technical solution. It is because of the fact that the distance elements are made of a thermoplastic material, which is not suitable for natural mineral plasters due to its properties. Further to that, situating the mesh diagonally will probably worsen the armouring function in the plaster.

Summary of the Invention

The aforesaid disadvantages are eliminated or significantly limited in case of the reinforcement netting pursuant to this invention. The subject of this invention consists in the fact that the load-bearing mesh from a metal or plastic material consists of a warp and a weft or a square welded net and is provided with distance elements in the shape of lenses from foamed plastic. On the rear side, the lenses are provided with an adhesion layer for the attachment onto the building structure.

The main advantage of this invention is its versatile application for all known building material and non-transparent building structures. The reinforcement netting only requires modest investment costs. Its handling is simple, fast and safe and suitable for a majority of renovations of surface of facades and walls of wet buildings.

The reinforcement netting has a bigger contact with the plaster, which increases its armouring ability. Load-bearing mesh with square design features very good armouring ability and strength in the direction of load applied on the reinforcement netting due to gravity of weight of the plaster. The lenses from foamed plastic material reduce weight of the reinforcement netting.

In the vertical section, each lens has a double-sided structural vault profile, which is bigger on the rear side of the reinforcement netting, facing the application of the building structure. The vault profile of the lenses contributes to increasing strength on the pressure of the armoured plaster. It creates sufficient distance of the load-bearing mesh from the building structure.

The lenses from the load-bearing mesh are located evenly within the surface, mutually with regular or irregular intervals. Even distribution of lenses in the load- bearing mesh ensures better surface parameters of the actual reinforcement netting, e.g. it creates the armouring layer in the same distance from the building structure. In case of uneven distribution, local losses could occur.

The lenses have asymmetric shape; they can be advantageously attached in the load-bearing mesh outside their horizontal centre and/or vertical centre. Their bigger part in terms of volume is situated on the rear side of the reinforcement netting, whereby the reinforcement netting is maintained in the optimum distance from the face of the plaster.

The bigger part of the lens in terms of volume on the rear side of the reinforcement netting has the surface of calotte of the back vault profile covered with an adhesion layer for attachment onto the building structure. The adhesion layer facilitates the installation of the reinforcement netting before mechanical anchoring.

The adhesion layer can consist of the adhesive that can be diluted with water to avoid damage to the organic material of the lenses.

The adhesive can be elastic, which enables repeated bonding of the reinforcement netting or, as the case may be, facilitates the application of the elastic glue before the installation and application of the reinforcement netting.

The adhesive can be on the cement basis so that it need not be applied on the lens but directly on the building structure, whereby the adhesion flats are only formed after the placement on the building structure.

The lenses made of the foamed polyurethane or polystyrene represent available material for the production of the reinforcement netting. Description of the Drawings

The invention is described in detail in the enclosed schematic drawings, where the following is represented:

fig. 1 top view of the reinforcement netting,

fig. 2 vertical cut A-A through the reinforcement netting from fig. 1 ,

fig. 3 horizontal cut through the building structure in case of the application of the

reinforcement netting on uneven base including the plaster and

fig. 4 horizontal cut in case of the application of the reinforcement netting on the building structural profile.

Preferred Embodiments of the Invention

The reinforcement netting 1 is displayed in the top view in Fig. 1. The reinforcement netting J_, is made of the load-bearing mesh 2, namely from wire mesh with anticorrosion treatment. The mesh 2 consists of a warp 3 and a weft 4 in square design.

The load-bearing mesh 2 consist of a wire e.g. with diameter of 0.8 mm and size of loops 12.5 mm x 12.5 mm. The load-bearing mesh 2 can also be formed as square welded netting from metal wires. A tough plastic material can also be used as the load- bearing mesh.

Into the load-bearing mesh 2, lenses 5 from expanded plastic material are foamed, e.g. from foam polystyrene or polyurethane foam. The lenses 5 are evenly distributed within the load-bearing mesh 2, but they need not be in the same axial distance. In the design specified in the example illustrated in Fig. 1 , the lenses 5 have a smaller distance in the direction of the weft 4 and a bigger distance in the direction of the warp 4. Their diagonal distances are different; they can be random but always such to evenly cover the surface of the load-bearing mesh 2.

In Fig. 2, this reinforcement netting is displayed in cut A-A from Fig. 1 , specifically in a vertical cut. In this vertical cut, the lenses 5 and their specific exemplary location in the load-bearing mesh 2 are illustrated. The cut illustrates vertical location of the load- bearing mesh 2 in the lenses 5, in the direction of the face 6 and rear side 7 of the reinforcement netting 1. On the basis of the Figures, it is obvious that in the cut A-A the lenses 5 in cut alternate with the lenses 5 in top view. The face 6 of the reinforcement netting represents its external side. The rear side 7 of the reinforcement netting 7 represents the side, which faces the building structure 9 during the application. This illustration clearly shows the asymmetrical shape of the lenses 5, which have double- sided structural vault profile. From the face side, this profile has lower height and has bigger radius of the vault. From the rear side, the structural vault profile has higher height and smaller radius of the vault. Therefore, the part of the lens 5 on the rear side of the reinforcement netting has a bigger volumetric part of the lens 5.

The lenses 5 in the load-bearing mesh 2 are attached outside of their horizontal and vertical centre.

A bigger part of the lens 5 in terms of volume on the rear side 7 of the reinforcement netting 1_ has the surface of calotte of the back vault profile covered with an adhesion layer 8, which is used during the application for bonding the reinforcement netting 1_ to the building structure. The adhesion layer 8 is formed of the adhesive, which can be a dispersion adhesive that can be diluted with water or acrylate adhesive that can be diluted with water or, as the case may be, fusion adhesive e.g. polyethylene or cement adhesive, plaster adhesive or bonding mortar, coating and cements can also be used as adhesive. The adhesive can also be applied just before the application of the reinforcement netting 1.. Elastic adhesive is permanently flexible, which is important for the application of the reinforcement netting 1. The adhesion layer 8 is important especially during the application because it facilitates handling with the reinforcement netting 1 and has the function of the temporary fixation means.

To avoid sagging of the reinforcement netting 1 during the installation, it is advantageous to locate it outside the centre of the lenses 5. The more convex part of the lens 5 is provided with the adhesion layer 8 and is attached to the base, the plaster 10. The adhesion layer 8, which is bonded to the base, does not permit copying the uneven surface of the building structure 9. It arches over the uneven places. After anchoring, of the reinforcement netting 1 and application of e.g. mortar through it, the uneven places of the base are filled in. The eccentrically located reinforcement netting 1 in foamed plastic lenses 5 removes it from the base and keeps it under the surface of the core plaster 10. Then the performed stucco plaster layer can have virtually the same thickness within the whole area. Creating of the armouring layer in the same distance from the face of the core plaster 10 guarantees the correct function of the reinforcement netting 1_. The location and the shape of the lenses 5 influence correct functions of the facade layer with respect to the distance of the reinforcement netting 1, dilatation of the plaster stratum, decreasing of mortar consumption, reducing weight of the plaster 10, keeping moisture for maturing from cement-lime mortars, decreasing heat permeability of the plaster layer. The distribution of lenses 5 so that they cover even surfaces and do not create prominent lines enables simple throwing of mortar through it and does not create stripes with different strength.

The application of the reinforcement netting 1 is illustrated in Fig. 3 and 4 for two different specific designs.

Fig. 3 illustrates the application of the reinforcement netting 1_ on an uneven base with a flat plaster surface. The application is illustrated in a horizontal cut through the building strata. On the uneven building structure 9, represented e.g. with uneven brickwork, the reinforcement netting 1 shall be attached so that it demonstrates flatness within the surface on its face 6. The fixation of the reinforcement netting 1 on the building structure 9 is realized by means of the adhesion layer 8, which is functional in the places of contact of the lenses 5 with the building structures 9. It is followed with common mechanical anchoring, which can be realized e.g. with the use of netting distance pieces, which are not illustrated. Then plaster 10, e.g. cement-lime, is applied through the reinforcement netting 1. above the level of tangents of the face side of the reinforcement netting J.. This plaster 10 application is realized in the common way so that the plaster 10 is bonded on the reinforcement netting 1, between the lenses 5, under and over them, and between them, and to cover the reinforcement netting 1 so that it creates the armouring element. Finally, after maturing of the core plaster IC^ it is levelled with lime stucco plaster J_1 to achieve a flat surface. Therefore, the lime stucco plaster H creates the flat final facade layer.

Another alternative application of the specific exemplary design in illustrated in Fig. 4 depicting the horizontal cut in case of application of the reinforcement netting 1 on the building structure 9, e.g. on the building structural profile. The building structural profile has a rounded surface. On this rounded surface, the reinforcement netting is applied so that it is in the maximum possible contact with it on the rear side 7 and in the adhesion layers 9 of the lenses. Then mechanical securing of the reinforcement netting 1 to the building structural profile is realized with common anchoring means, which are not illustrated, so that the face 6 of the reinforcement netting 1_ does not copy the uneven places of the building structural profile and the face 6 of the reinforcement netting 1. is not deformed, i.e. has flat surface. To achieve such conditions, it is not necessary to use all adhesion layers on the rear side 7 of the reinforcement netting 1 The plaster 10, e.g. cement plaster or, as the case may be, hard plaster or bonding mortar, as required, is applied through such prepared reinforcement netting 1, . The final treatment is realized by the application of a thin layer of a stucco plaster 1 1_,, e.g. with plaster, mineral layer, paste layer etc. Alternatively, the surface for the stucco plaster, or instead of it, can be faced with wood, ceramics, tiles etc. During the application of the reinforcement netting 1 pursuant to this invention, a building stratum is created, in which the lenses 5 function as a structural element. The lenses 5 decrease weight of the plaster layer. Furthermore, the lenses 5 equalize the dilatation differences between the applied diverse building materials in case of changes of temperature, humidity etc. The lenses 5 also create a distance gap between the load-bearing mesh 2 of the reinforcement netting 1 and the building structure 9 and the building structural profile. With respect to the low coefficient of heat permeability, the lenses 5 increase thermally insulating capacity of the building stratum.

With respect to the optimum distribution of lenses 5, the load-bearing mesh 2 achieves the maximum armouring effect in plaster 10.

Industrial applicability

The solution is designed for the building industry, especially for renovations of the surface of common buildings, of both historical and prefabricated tower blocks, with the application in interiors as well as on external facades. Furthermore, the solution is suitable for thermal insulation of the buildings.

Legend

1 reinforcement netting

2 load-bearing mesh

3 warp 3 of the reinforcement netting 1

4 weft 4 of the reinforcement netting 1

5 lens

6 face 6 of the reinforcement netting 1

7 rear side 7 of the reinforcement netting 1

8 adhesion layer 8 on the lens 5

9 building structure

10 plaster

1 1 stucco plaster

Claims

C L A I M S

1. The reinforcement netting for armouring surface layers of building structures (9), including the load-bearing mesh (2), the load-bearing mesh (2) from metal or plastic material, which consists of a warp (3) and a weft (4) or a square welded net, in the intersection points of which distance elements are arranged in the shape of lenses (5), which are distributed evenly, mutually in regular and/or irregular intervals,

characterized in that

- on the load-bearing mesh (2), in the intersection points of the warp (3) and the weft (4) or the welded net, the located distance elements in the shape of lenses (5), favourably from the foamed plastic material, are provided on the rear side (7) with an adhesion layer (8), where

- the lenses (5) feature, in the vertical cut, a double-sided structural vault profile, - while each lens (5) has, in the vertical cut, a bigger structural vault profile on the rear side (7) of the reinforcement netting (1) facing the building structure (9) during the application.

2. The reinforcement netting pursuant to claim 1 , characterized in that the lenses (5) are attached in the load-bearing mesh (2) outside of their horizontal centre and/or outside of their vertical centre.

3. The reinforcement netting pursuant to claim 1, characterized in that a bigger part of the lenses (5) in terms of volume on the rear side (7) of the reinforcement netting (1 ) has the surface of calotte of the back vault profile covered with an adhesion layer (8) for attachment on the building structure (9).

4. The reinforcement netting pursuant to claim 3, characterized in that the adhesion layer (8) consists of the adhesive that can be diluted with water.

5. The reinforcement netting pursuant to claim 4, characterized in that the adhesive is elastic.

6. The reinforcement netting pursuant to claim 3, characterized in that the adhesive is on the cement basis.

7. The reinforcement netting pursuant to the claim 1 , characterized in that the foamed plastic material for the lenses (5) is polyurethane or, as the case may be, polystyrene.