DE3130926A1 - COAT WALL SYSTEM - Google Patents

Abstract

The invention relates to an extremely light, highly heat-insulating one-way plug-in formwork for the production of optimally functional, cost-effective clad concrete outer walls, preferably for residential construction. The one-way plug-in formwork is prefabricated in packs. A formwork package consists of two longitudinally grooved insulation panels (1), preferably made of rigid foam, and a connecting element pretensioned by means of wire hooks, which, in addition to the wire hooks, contains two spring board strips (2), preferably made of chipboard blanks. On the construction site, the formwork packages are taken apart and put together like formwork. The connecting element (2) engages in the insulation formwork (1) like a tongue and groove. The thus assembled insulation wall formwork is then filled with in-situ concrete (3). While the insulating formwork panels (1) arranged on both sides of different thicknesses provide a high level of thermal insulation, the monolithic core concrete filling (3) results in optimal functionality in terms of static strength, heat storage capacity, sound insulation and fire protection. In this arrangement, the connecting elements (2) are integrated into the casing plates (1) in such a way that the tension wires cannot form a thermal bridge and the spring plate strips of the connecting elements (2) result in a nail-proof, concealed substructure for attaching wall coverings of all kinds.

Description

General and techn. Was standing:

The increasing global shortage of energy and the associated increase in heating costs are forcing effective heating energy savings, especially in residential construction. The thermal insulation of room-enclosing components, in particular the thermal insulation of the outer walls of the house, is of particular importance.

After the minimum insulation values prescribed by building law for the outer walls of the building have been increased several times, the traditional, solid masonry structures with insufficient thermal insulation can no longer be used without additional insulation.

However, since it makes little sense in terms of construction costs to add the costs of additional thermal insulation to the already high costs of a traditional, handcrafted wall construction, wall construction types in which a high level of thermal protection is already included in the wall construction should gain in importance .

With the already known concrete wall construction, the conditions of full thermal insulation for the outer walls of residential buildings can be fully met. In practice, those cladding concrete wall constructions that can provide a particularly high level of thermal insulation were reluctant to be used by the construction workers, i.e. H. only used sporadically. It has long been known to construction experts that all previously known clad concrete systems have a large hook, which thoroughly spoils the user of this type of wall construction.

Shell concrete walls are characterized by the fact that a concrete formwork remaining on the wall is made of heat-insulating materials, which is inseparably connected to the filled, statically effective core concrete. Since the jacket insulation material used as formwork takes over the function of thermal insulation on its own, the load-bearing and stiffening concrete core only needs to be dimensioned according to the static requirements.

The most important weak point of all cladding concrete wall systems can be seen in the fact that the cladding material is in principle expected to perform a contrary task that cannot be optimally performed by any known cladding material.

On the one hand, the wall jacket should provide as high a thermal protection as possible, but on the other hand it should also form a formwork that resists the pressure of the concrete and remains on the wall. As is known, only the very light, little pressure-resistant jacket insulation materials have a high insulation value. In contrast to this, a concrete formwork is the more pressure-resistant and resistant, the harder, heavier and stronger the formwork material is. However, since there cannot be any jacket material that is light and soft and heavy and hard at the same time, only middle-way compromise building materials are usually used in concrete jacket construction.

Almost all previous inventive efforts to solve this basic problem have therefore primarily been concentrated on finding effective insulation material-jacket connections which support and strengthen the insulation material jacket shells placed at the formwork distance in such a way that despite their unstable nature, they can withstand the pressure of the concrete filling without deformation.

Two concrete cladding systems, which differ from a technical application point of view, are mainly known:

1. the formwork stone-like shell concrete elements,

2. the tensioned insulation jacket plate systems,

the first-mentioned clad concrete wall construction has, inter alia. the serious disadvantage that not only the formwork jacket, but also the jacket connecting webs are made of insulating material. These insulating material connecting webs penetrate the statically effective core concrete in innumerable places and weaken its load-bearing capacity and stiffening. In addition, these insulation wall penetrations are extremely unfavorable in terms of fire protection.

These disadvantages do not appear in the case of the second-mentioned type of shell concrete, since a monolithic core concrete formation is possible here. However, serious disadvantages result from the cladding tension, i.e. from the spacing of the insulation panels that forms the formwork. The bracing means (steel wire, sheet metal, plastic holder, etc.) that penetrate the formwork-forming casing panels can only create punctual resistance to the pressure of the concrete. These small external resistances, which are supposed to absorb the filling concrete pressure, are all too easily drawn into the relatively soft outer shells, which causes wall bulges. In addition, the tensions penetrating the insulation jacket form localized thermal bridges. Another disadvantage can be seen in the fact that the nails, screws and hooks in the insulation jacket only have insufficient hold in order to fasten objects to the insulation jacket wall, so that you have to dowel through it into the concrete core.

The invention:

The invention is essentially characterized in that the casing plates (f) are no longer braced directly as usual, but indirectly via pre-stressed spring plate elements (I) in the form of the formwork. As a result, instead of the otherwise usual small-area individual bracing, there is a large-area overarching element bracing, which can provide more effective resistance to the pressure of the concrete filling (k) on the insulation jacket panels (f).

The tension wire hook (d) cannot cut into the hard spring plate strips (a), even with strong concrete pressure, as is the case with individual cladding plates.

Due to the tongue and groove connection, the surface of the shell plates are automatically aligned next to them and can no longer move against each other when the concrete is filled.

Since the pre-tensioned spring board strips are concealed in the grooves of the insulation jacket panels (f / g), the tension wire hooks (d) also end in the jacket insulation on both sides so that no heat / cold bridges arise over the bracing.

The innovation jacket wall can be nailed on both sides of the wall in the area of the concealed spring plate strips (a). Wall cladding of all kinds (dry plaster boards, plaster base mats, counter battens for ventilated facade cladding and much more. can only be quickly nailed, screwed or stapled to the concealed spring plate strips (a). Nails driven through the plaster for hanging pictures, etc., also find sufficient hold in the spring board strips (a).

Due to the overarching effect of the pre-tensioned spring plate elements (I), even narrow cladding plate remnants, which arise when adapting to the planned wall length dimensions, can be inserted without loss of tension.

A special innovation advantage can also be seen in the fact that a compact shipping package (A) can be put together from the dimensionally matching shell wall parts (pretensioned spring plate element and insulation shell plates on both sides), which can be transported and stacked inexpensively. It is also advantageous here that the grooved, transport-vulnerable longitudinal edges of the casing plates (f / g) are effectively protected by the overlapping spring plate strips (a) until they are used. The three parts of the ironer wall package can be held together for transport using adhesive paper tape.

Angled aluminum sheet metal strips are preferably arranged for the floor connection of the insulating material jacket plates (f) or their corner composite. In the case of the prestressed floor connection spring plate elements (II), the spring plate strips (a / 2), which are halved in height, have a partially engaging central saw cut on the underside in which the angled ends of the tensioned sheet metal strips (h) engage and are connected to the spring plates by means of lateral stapling (e) will. The floor connection elements (II) placed in the course of the wall along the alignment line on the concrete floor or on the floor ceiling (i) are connected flush with the floor by means of spaced connection so that the first row of casing plates (lower part of drawing -B-) can be attached.

To produce high-tensile corner connections (III), the spring plate strips (a) are provided with a central saw cut on the front side, into which sheet metal angles (h) are inserted and stapled, as is the case with the floor connection elements (II).

In the case of the new shell wall, differences in wall height are compensated for in that (according to drawing B, upper part), shell plate cut-to-size strips (I) of the appropriate height are plugged onto the spring plate strips (a).

The slab edge formwork (m) also consists of the slab height (n) adapted, clipped-on cladding sheet cutting strips. So that the ceiling edge formwork (m), which is not tensioned at the top, cannot be pushed away by the ceiling concrete, removable, upright board lugs are attached to the outside of the concealed spring board strips at intervals.

In the case of wall ends (doors, windows, sloping gables, etc.), the spring plate strips (a) are arranged in such a way that they protrude slightly from the side of the casing plates (f). A closure shuttering arranged between the spring plate strips (a) can thereby be connected to the delimiting spring plate protrusions temporarily or remaining in the wall in a pressure-tight manner.

The plugging together of the new shell wall parts is so easy, efficient and easy to handle that the core concrete filling (k) can be carried out step by step with the construction of the shell wall parts.

Drawings + signs

Fig. 1

A = shell wall package consisting of a spring plate element and two inserted, grooved insulation shell plates (horizontal section, 1: 5 scale)

B = shell wall formed from the shell wall packages (A) and filled with concrete (k) with formation on the floor and ceiling (vertical section M 1: 5)

I = pretensioned spring plate element

II = pre-tensioned spring plate floor element

III = corner connection of the pre-tensioned spring plate elements (fragment) I-III M 1: 5

a = springboard strips, preferably made of 15 mm thick, 100 mm wide and 2000 mm long chipboard strips

b = perforation of the spring plate strips, preferably at a distance of 25 cm for inserting the tension wire hooks (d)

c = in the middle of the spring plate strips (a) groove cut on one side (preferably 3/3 mm) for countersinking the tension wire hooks (d)

d = tension wire hook, preferably made of semi-hard steel wire 50/280/50/3 mm

e = staple that holds the tension wire hook (d) in the groove (c)

f = shell panel, optionally made of rigid foam panels, composite panels (rigid foam core and lightweight construction panel cover layers) preferably made of 50-100 mm thick, 500-2000 mm long, 250 mm wide panel formats.

For uninsulated wall sides, removable, 250 mm wide wooden shuttering panels can also be used as an exception (with flanged groove plates)

g = shell plate groove, the longitudinal edges of the shell plate on both sides, preferably
<notreadable>
mm wide, 50 mm deep, 10 mm behind the outside of the plate

h = ALU sheet metal strips as floor spring plate bracing (II) or for spring plate corner connection (III)

i = concrete floor or ceiling top

k = wall concrete filling depending on the thickness of the outer insulation board 150-200 mm thick

l = insulation board attachment strips for wall height adjustment

m = insulation board attachment strips as insulating ceiling outer formwork analogous to the shell wall outer panel thickness and according to the respective ceiling thickness

n = indicated ceiling support

a / 2 = spring plate strips halved in height (a) for the floor connection

Claims (8)

1. Cladding wall system, preferably for house exterior walls with optimal heat protection function, characterized in that here, as usual, a formwork bracing that punctually penetrates the cladding panels is not arranged, but that the relatively soft insulation cladding panels (f) indirectly via relatively hard, pretensioned spring plate elements (Fig . 1 / I) Groove and tongue-like connected, waving over a large area, braced like a formwork over and over. 2. cladding wall system according to claim 1, characterized in that for pretensioning the spring plate elements (Fig. 1 / I), the spring plate strips (a), preferably consisting of chipboard or plywood strips, have a central perforation through which the tensioning wire hooks (d ), after which the angled ends of the tension wire hooks (d) fit into a central groove (c) on the outside of the spring plates (a), in which they are held by means of staples (e). 3. Almond wall system according to claim 1-2, characterized in that the tension wires (d) of the pretensioned spring plate elements (I) end in the casing plate grooves (g) and are thus covered on both sides by a part of the casing insulation material (f) so that they are not covered by the Wall conductive cold bridges can form. 4. cladding wall system according to claims 1-3, characterized in that the relatively hard and firm spring plate strips (a) hidden in the soft cladding insulation material (f) provide an excellent hold for wall cladding materials of all kinds to be nailed or screwed on. 5. cladding wall system according to claim 1-4, characterized in that from two cladding plates (f) and a pretensioned spring plate element (I) a related, compact material package (A) can be formed, wherein the outer spring plates (a) the transport-vulnerable groove edges (g ) of the soft shell plates (f) protectively. 6. cladding wall system according to claims 1-5, characterized in that separate spring elements (II) are arranged for the floor connection (i) of the casing plates (f), wherein the spring plate strips (a / 2) which are halved in height have a central saw cut that engages on one side a tensioning sheet metal strip (h), angled on both sides and preferably made of aluminum sheet, engages and is connected to the spring plate (a / 2) by means of staples (e). 7. cladding wall system according to claims 1-6, characterized in that the spring plate corner association (III) is produced in that the spring plates (a) which are angled at the wall corners have an incision at the end in which connecting gusset pieces (h) are attached. 8. cladding wall system according to claims 1-7, characterized in that wall height differences are compensated by the fact that the planned wall height adjusted cladding plate blank strips (I) are attached to the protrusion of the top spring plate elements (I) and in the same way the ceiling-high-cut ceiling-edge formwork (m) made of insulating material jacket panels (f) is arranged, whereby the pressure of the ceiling concrete can be intercepted by means of retaining tabs nailed to the outside.