The present invention concerns an assembly system for non- constructive walls comprising a layer of a composition including a foamed polymer material and cement, optionally in addition to an outer wall cladding, plating or panelling, and being braced by beams and/or metal braces.

The background for the present invention is that it is possible to create walls of non-constructive materials as indicated supra, but when forming such walls, and especially elements for such walls, the assembly of the wall elements will normally be made difficult by problems concerning obtaining a satisfying fitting between the elements as well as securing the elements to each other.

This is especially true for such elements which are being used when erecting e. g. noise barriers towards trafficked roads, airfields etc., or elements being used as fences or other types of obstacles.

When constructing noise barriers it is important that the element has proper sound-isolating properties. Such properties are obtained with a material comprising a mixture of a foamed polymer material having been made impact proof by the addition of cement. Such a material is sold under the brand name"Thermozell". In addition to being sound proofing, such a material will also have a certain bracing capacity, even if it per se is not suited for forming carrying wall constructions in buildings. Also the material is partly porous on account of its content of the foamed polymer material (EPS, Expanded Polystyrene, Polyurethane, etc.), and it has accordingly in its edge area a tendency to crumbling and flaking when mounting the element to complete walls. Thus there exists a need for giving such elements an edge area giving the possibility for them to be assembled to whole walls where the possibility of crumbling/flaking in the edge areas has been

eliminated or has been reduced to a minimum, and where the design of the edge areas gives an opportunity for assembling the elements to each other.

When forming elements with properties as indicated supra, it is preferred to construct the element about a skeleton or frame of beams, preferably metal beams. Such an assembly is indicated in the enclosed figures. The metal frame or skeleton represents a carrying construction for the assembly. Around this frame or skeleton there is cast or assembled an envelope of the cement-stabilised foamed polymer material, thus giving the metal frame or skeleton improved constructive carrying properties. The foamed and cement-stabilised polymer material will form a bracing sheath about the carrying girders or beams making it optionally possible to reduce the size of such beams or girders and simultaneously maintain their carrying properties. This will make it possible to optionally reduce the dimensions of the relevant elements while maintaining their thermal and sound-proofing properties. A reduction in size is, as indicated, optional, and it will of ~ourse be possible to form elements with conventional dimensions while maintaining the other improvements in reduced weight, sound-and temperature-proofing and reduced crumbling/flaking in the edges of the elements, as indicated supra.

An embodiment of the securing assembly according to the present invention is indicated in the accompanying figures, wherein: Fig. 1 shows the construction of an element according to the invention, observed from the side; Fig. 2 shows the same element as fig. 1, but seen in a sectional view from above;

Fig. 3 shows a section of an assembly area between two elements as indicated in figs. 1 and 2.

In the figs. 1-3 a frame of metal girders and/or profiles 3 is shown, where this frame forms an internal skeleton in the element. Any conventional frame structure is possible.

The frame structure of girders or beams 3 runs in the vertical direction of the wall element, preferably from the top to the bottom of the element, while there runs a corresponding horizontal girder or beam to a distance from the outer edges of the element (see figs. 1 and 3). The vertical outer edge of the element this may alternatively be fee from braces (see fig. 3), or be equipped with braces with a U-profile 1 to further strengthen the outer edges of the element. On each horizontal over-and under-side of the frame of braces or girders or beams 3 in the element according to the invention, the element is equipped with listings/braces all the way to the edges of the element.

On each side of the frame/skeleton of steel braces or girders 3, the element may also be equipped with a U- profile with edges pointing to the inside of the element.

About this frame/skeleton there is cast a cement-enforced polymer material ("Thermozell"-plates) so that the structure of the element as disclosed supra is formed.

The dimensions of the constructive element according to the invention are not critical, and they are more dictated by the esthetical and practical considerations than what is technically possible. All the same, it is preferred to make wall element which do not exceed 5 m x 5 m with a thickness not exceeding 50 cm. Furthermore, it is preferred, but not required, to make the grooves in each vertical side of the element sufficiently wide, and preferably with a width corresponding to half the thickness of the element.

When assembling such element on the construction site, there will initially be erected a number (at least 2) of

beams (metal (steel, aluminium, etc.), wood, concrete etc.) with the purpose of bracing the elements according to the invention. The thickness of these beams is chosen so that they fit inside the opening created between each side edge of the element so that they extend past the outer edge of the element according to the invention with at most half of their thickness. The height of the beam will normally correspond to height of the element, is that the element will be braced in its entire height when the beam lies in the groove formed between the outer plates of the element.

When locating a U-profile in the outer edge of each side of the element, the dimensions of the beams will be chosen so that it fits inside the U-profile, and this will give a further bracing/stability in the seam between the beam and the element.

By placing two wall element around a beam, a stable, but not carrying, wall construction will be formed (see fig.

3).

When erecting permanent walls the inner part of the groove being formed on each vertical edge of the wall elements according to the invention, may be equipped with barbs cooperating with corresponding protruding elements on the beams (or vice versa) so that it will only be possible to push the wall element in one direction along the beam since the barbs will prevent the element moving backwards in the groove to the beam.

In the slit being formed at each joint between adjacent wall elements according to the invention there may additionally be placed a covering/decorating listing which both improve the esthetical appearance of the wall surface being created according to the invention, and prevent moisture from migrating into the joint. Such a covering/decorating listing may be secured to the edge of

each wall element and/or to the vertical securing beam in a conventional manner.

In an embodiment of the securing system according to the invention it is preferred not to equip the joint parts with uni-directional devices (barbs/protrusions) since each element should have the opportunity to be able to move relative to the securing beam. This will inter alia be advantageous when erecting sound-proofing towards roads, since such elements should have to possibility of assimilating ground movements in relation to the formation of ice and other movements on the ground they rest on.

When forming wall elements with joining systems according to the invention, it will also be possible to equip the elements with decorations of diverse kinds, since the surface of the elements will not include securing devices such as bolts, screws, nuts, etc.

The invention will be illustrated infra with reference to an embodiment of the invention concerning the erection of a sound-proofing screen according to the invention. In the -embodiment the height of the constructive system is not critical.

When constructing a sound-proofing screen a number of girders/beams are initially driven into the ground and secured in a conventional manner. The dimensions of such beams may be: Height-2 m; Cross section (rectangular)- 5 cm x 10 cm. The beams will preferably be driven into the ground so that they protrude vertically. The distance between each beam correspond to the width of a plate element, and this may e. g. be 2 m.

When placing the plate element about these beams, the plate element has a height corresponding mainly to the height of the beam, i. e. 2 m. Since the cross sectional dimensions of the beams is 5 x 10 cm, the vertical groove in each edge

of the plate element is 5 x 5 cm, ant the total thickness of the plate is 10 cm. The plate is placed by lifting it over the top of the beam and then lowering it down along the beam so that the beam is led into the vertical groove in the plate. After placing the plate a protective/decora- tive listing may be placed in the joint between two plate elements, and such a listing may be secured in a conventional manner, e. g. by either being secured to the beam (glued, bolted, screwed, etc.) or to the plate element (or both). The groove along the vertical edges of the plate element are in this example equipped internally with a U-profile of aluminium, and the top of the plate element is also covered by a U-profile lying over the plate element for protecting this against precipitation. The bottom of the plate element is also equipped with a U-profile which may protect against moisture which may migrate from below in the element.

It will also be possible to equip such plate elements with an extra outer layer of a synthetic material (plastic, varnish, resin).. to protect it from erosion by the weather, and it is also possible to equip the element with some form of decoration to improve its esthetical appearance.

In a preferred embodiment of the plate element according to the invention, there is used steel braces with a thickness of 0,5-5,0 mm. Furthermore it is preferred to use a cement-braced polymer material (cement-stabilised EPS) with a specific weight of 200-800 kg/m3. The cement-braced polymer material is cast to include the steel braces homogenously in the material, for in this way to improve the carrying properties of the steel braces. The cement- braced polymer material has preferably an impact-resistance of 0,3-2,5 N/mm2