MXPA97007279A - Mortar isolated - Google Patents

Abstract

The present invention relates to an insulating mortar for filling of floors and ceilings with high insulating qualities, both thermal and acoustic, consisting of a dry mixture of cement and filling material, prepared ready for use under the addition of water, characterized by the fact that it is produced from: 90-94% by volume of recirculated solid polyurethane crushed in a mixture of powder and granules with a granule dimension of less than 8 mm, and 6-10% by volume of cement, specifically 92 % by volume of recirculated solid polyurethane and 8% by volume of cemen

Description

INSULATING MORTAR The present invention is applied to an insulating mortar, which is used for filling floors and ceilings with high thermal and acoustic insulating qualities.

The invention has its most important use in the construction industry, it is suitable for covering concrete layers and as a filling material in different types of constructions.

A known composition of WO-91 04 291 - is supposed to provide the cover layer; it consists of a mixture of phenol resin and cement. An ester catalyst accelerates the reaction between the two components. The mixture can be used as a filler material, as a solid material and as a reinforcing piece.

Furthermore, a cement-based and vericulite-based insulating material of EP-A-0 219 579t is known. This product has a high resistance to pression and pressure forces. It can be used for the production of pre-manufactured panels.

Both documents refer to an insulating material - with high insulating qualities, both thermal and acoustic, even this material does not allow the recirculation of waste products.

The object of the present invention is to convert a waste product, which is found in large quantities, into a valuable product.

The insulating mortar according to the invention has considerably larger insulating values than the existing mortars, with typical values being: 1 a bda 0.05 W / mK.

By increasing the cement portion of the mixture, you can increase the pressure resistance and change the insulation values.

Paliurethane recirculated from various industrial branches serves as a basic component. Some examples for this can be automobile stops, insulating roof panels, refrigerators, freezers, boilers and other waste products containing solid polyurethane.

This solid polyurethane foam is crushed into a mixture of refined parts and granules with a grain size of less than 8 mm. and they are mixed to achieve a volume --constant, because the materials provided have a different density in the area of 35 kg / M3, at more than 200 kg / m3.

After a very diligent mix, additional substances such as cement, hydraulic lime and dye are added to achieve a dry mortar mix, which hardens with the addition of water. This dry mix is packed in paper or plastic bags. Only water has to be added, to also make it possible to produce the mixture in the place where it will be used, The mortar according to the request consists of at least 70%, preferably 80% ground and in this way recirculated foamed solid polyurethane, the rest is cement; If necessary, aggregates are added, especially a dye. The amount of cement is selected in such a way that at least a satisfactory setting or even a tough setting can be achieved. Consequently, the addition of cemejí to, can not fall below a certain value, which is greatly demented by the surface area of polyurethane-crushed.

The dimension of the polyurethane parts is not - very important, since it has still been shown that parts with dimensions smaller than 20 mm can be easily handled. , preferably even less than 8 mm. During grinding, dust results. This portion of dust fills the space that would otherwise be empty between the particles and increases the total surface area. Therefore, if there is a large portion of dust, you need to add more cement.

It has been shown that it is of great advantage to add an anti-foam agent to the basic mixture. For this purpose, light acids or acid salts are used; These have the objective of destroying the bubbles that appear during mixing. -Usually, the addition below 3% is sufficient, preferably below 1% of the weight of the total mixture.

It has also been shown that it is advantageous to use an intermingling agent or an active surface agent; For this purpose, phosphates are usually used. An addition less than 1% has shown itself to be adequate. It is also advantageous to add a liquefier, such as melamine resin, naphthalene, sulfite liquor (for example a dried sulphite liquor) The amount of added liquifier may also remain below 1% of the weight of the complete mixture.

Finally, retarders and accelerators can be added for cement setting. These additives in general are well known for concrete, these additives are also suitable for insulating mortar.

In a preferred embodiment, a coloring pigment is added, to give the mortar mixture a desirable color uniformity. Iron oxide (Fe20g), which is present as a powder with a maximum granule dimension of -2 microns, is particularly suitable. It adds enough to achieve sufficient coloration.

It is possible to reinforce the insulating mortar; Suitable for this purpose are mats, especially plastic mats, as well as lumpy material, such as lumps of synthetic material and the like.

Additional advantages and additional qualities of the invention are disclosed in the other clauses and the description that follows now of examples of use, which will not be construed as limitation. They will be explained with the help of the drawings.

In the drawings: Figure 1 shows a diametrical view of the structure of a floor; Y Figure 2 shows a second diametrical view of a roof structure, once inclined and once horizontal. A layer of insulating mortar 24 according to the invention is spread on a concrete layer 20, which supports a wall 22. Previously, the necessary pipe, here represented by a pipe 26, has been placed on the concrete and then covered with insulating mortar. Usually, mají has a minimum thickness of layer 24 of 3 cms., The usual thickness being between 5 and 10 cms.

A mixture of grains and polyurethane pieces is used for the insulating mortar; from 30 to 40% of the weight of the mixture consists of fine powder with a granule dimension of 0.1 mm. 10% of the mixture has a granule dimension greater than 2mm.

The layer 24 is on the side immediately adjacent to the wall 22. In the embodiment on the left of Figure 1, at the top of the layer 24, there is an insulating layer 28, such as is used manually to isolate the sound of footprints and is prescribed frequently. This layer 28 can be omitted, as shown in the right part of Figure 1, where that layer is not provided. The layer 24 causes adequate insulation to the sound of the piles.

A layer of floor pavement 30 is found upstream of layer 28, still on the right side of the illustration immediately above layer 24. It is slightly re-enforced and typically has a resistance of 5 cm. In its upper part, there is the real floor, represented here -by means of bricks. Opposite the wall 22, the pavement -of floor, is distanced, either through the layer 28 or through-material placed insulating mortar. A bottom rail 32 is contemplated.

Typically, the insulating mortar is compressed after its application, for example by means of a light punch with a flat tool. Flat corners are suitable, for example, those that have an area between 2 i and i m, which are connected with a handle. With the help of the handle, the plate is pressed on the loose piling of mortar and thus compressed and also matched. Other ways of compressing the mortar are possible.

In the embodiment according to Figure 2, the structure of a flat roof, on the right side inclined, on the horizontal left side, are shown. A layer 24 of the insulating mortar is applied immediately on the concrete ceiling 20 supporting the load; the right part of the illustration, the objective is completed in such a way as to show an inclination after compression, in the left part of the illustration, on the other hand, a level surface emerges. Again it is possible to provide pipe 26 or the like. At the top, the layer 24 is immediately covered by a seal 34 which ensures that the structure is waterproof. To the right, the flat roof 22 is -termined in a small wall 22, which is superimposed by a protective profile.

EXAMPLE. - To obtain 50 1. net of ready-to-use mortar, a dry mix bag according to the invention is taken with a volume of approximately 76 1 and a weight of 23 kg. Approximately and mix for about 1 min. in a compulsive STO or HST mixer while adding water. You can also use a concrete mixer, a simple mixer, a Estromat (MR) type blow molding machine or a PFT type flooring machine.

With a bag of dry mix, with a volume of 76 1 2 can cover 1 m of surface with a layer of mortar - insulating 5 cm thick. The specific weight is approximately 450 - 3 kg / M. The resistance to pressure, is at = 2 at least 2 kg / M.

The insulating material according to the invention can also be used to produce insulating plates, panels - insulators intended for use in divisions and / or for building bricks.

Claims (8)

R E I V I N D I C A C I O N E S.

1. - Insulating mortar for filling floors and ceilings with high insulating qualities, both thermal and acoustic, consisting of a dry mix of cement and filling material, prepared ready for use under the addition of water, characterized by the fact that It is produced from: 90 -. 90-94% by volume of recirculated solid polyurethane crushed in a mixture of powder and granules with a granule dimension less than 8 mm. Y 6 -. 6 - 10% by volume of cement, specifically 92% by volume of recirculated solid polyurethane and 8% by volume of cement.

2. - Insulating mortar according to clause 1, characterized in that the mixture also contains slaked or hydraulic lime and / or pigments, especially pulverized iron oxide.

3. - Insulating mortar according to any of the preceding clauses, characterized by a specific gravity of - 3 300 to 450 kg / m approximately, especially 400 kg / M

4. - Insulating mortar according to any of the preceding clauses, characterized in that it contains an anti-foaming agent, as an additive, especially a dilute acid or a salt.

5. - Insulating mortar according to any of the preceding clauses, characterized in that it contains an agent of its active surface as an additive, especially a phosphate.

6. - Insulating mortar according to any of the preceding clauses, characterized in that it contains a liquefier as an additive, especially a melamine resin.

7. - Insulating mortar according to any of the preceding clauses, characterized in that it contains a means for providing thixotropic operation as an additive, -especially an adhesive, such as a carpet adhesive, for example methyl cellulose,

8. - A method for producing a construction element using an insulating mortar according to any of the preceding clauses, characterized in that it comprises distributing the mortar in an area or filling a mold and then compressing it, especially with pressure by stamping. SUMMARY . INSULATING MORTAR. The invention relates to an insulating mortar exhibiting very good thermoinsulating properties. The mortar contains at least 70% by volume, preferably at least 80% by volume, in particular at least 85% by volume, of hard, shredded, recirculated polyurethane and the remainder consists of cement and optionally additives as well as water for purpose. -setting.