NL1036060C2 - Insulated slab for use in floor of building, has reinforced concrete layer and insulation layer including closed cavity, where wall of closed cavity includes emission reducing layer with specific emission coefficient - Google Patents

Abstract

The slab (1) has a reinforced concrete layer (3) and an insulation layer (2) including a closed cavity (6), where a wall (7) of the closed cavity includes an emission reducing layer with an emission coefficient less than 0.5. The emission reducing layer is applied by coating, laminating or painting the wall of the closed cavity.

Description

5

ISOLATED FLOOR PLATE

The invention relates to an insulated floor plate, such as can be used, for example, for storey floors of buildings. Typical floor plate systems are channel plate floors and RIB cassette floors. It is usual to provide these floor plates with an insulation layer. These insulation layers usually consist of expanded polystyrene (EPS). The thickness of the insulation layer determines the extent to which heat is retained by the floor.

Due to the ever-increasing insulation requirements, the insulation layer is becoming increasingly thicker. However, the height of the floor plate must remain limited. As a result, the thickness of the insulation layer is limited. Even with a maximum thickness of the insulation layer, it is difficult to meet this with the current insulation requirements.

In addition, the use of polystyrene is harmful to the environment. It is therefore desirable to limit the use of polystyrene as much as possible. However, due to the increasingly stringent insulation requirements, the use of polystyrene is constantly increasing.

It is now an object of the invention to reduce or even prevent the abovementioned disadvantages. To this end, the invention provides an insulated floor plate comprising at least one insulating layer extending on one side, the insulating layer being provided with at least one sealed cavity.

The amount of polystyrene can be reduced by the use of cavities. Air or other insulating gas is present in the cavities, which ensures that the insulation value of the insulation layer is retained.

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In a preferred embodiment, the cavities extend in the longitudinal direction. Since the insulating layers are usually extruded, the use of longitudinally extending cavities is advantageous. It is even possible to use only a single cavity in such an embodiment.

In another preferred embodiment of the invention, the insulation layer has an emission coefficient of less than 0.5, preferably 0.3. The emission coefficient is a value for the radiation of energy from the insulation material. By providing cavities in the insulation layer, energy via the air can easily reach the other side of the insulation layer. By now having a material with a small emission coefficient, a large part of the energy is reflected and the energy does not get the possibility to bridge a part of the thickness of the insulating material via the cavity.

In yet another embodiment of the invention, the wall of the sealed cavity comprises an emission reducing layer. As already explained above, energy can easily bridge the cavity, unless the emission coefficient of the material of the insulating layer is low. By now applying an emission-reducing layer to the walls of the sealed cavity, the appearance of the insulating material can be further reduced and the energy transfer via the air in the cavities is limited.

Preferably, the emission reducing layer is applied by coating, caching or painting.

These and other features of the invention are further elucidated with reference to the accompanying drawings.

Figure 1 shows four different cross-sections of insulation layers according to the prior art for a floor plate.

Figure 2 shows a cross-section of a floor plate according to the invention.

As can be seen in Figure 1, the insulation coefficient RC is dependent on the thickness D of the insulation layer. Since the maximum height H of an insulating layer is limited, the thickness D of the insulating layer is thereby also limited.

Figure 2 shows a floor plate 1 according to the invention. This floor plate 1 has an insulation layer 2 and a concrete layer 3 arranged thereon 5. In this concrete layer 3 a mirror reinforcement 4 is provided and a main reinforcement 5. The insulation layer 2 is provided with two longitudinally extending cavities 6. The thickness D of the insulation layer 2 is here limited to the maximum height H. By using the cavities 10, the amount of material is limited.

In order to further increase the insulation value of the insulation layer 2, a layer can be applied to the walls 7 of the cavities 6, which layer further reduces the emission coefficient. Here one can think of a coating layer or a paint layer with which the emission coefficient can be further reduced. Examples of this are: - coatings as offered by DW Pearce Enterprises, in particular the coating with the brand name "Supertherm".

- multi-reflective film under the brand name "Actis" 20 from the company Del-Ba Products International or another type of aluminum film with the same radiation reflection properties.

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Claims (9)

3W / 2FW17 / MV / lp CHANGED SET CONCLUSIONS 5 An insulated floor plate comprising an insulating layer, which insulating layer comprises at least one sealed cavity, Floor plate according to claim 1, wherein the at least one sealed cavity extends in the longitudinal direction. 3. Floor plate as claimed in claim 1 or 2, comprising a force-absorbing layer, for example a reinforced concrete layer. 4. Floor plate as claimed in any of the foregoing claims, wherein the insulating layer is made of a material with an emission coefficient of less than 0.5, preferably less than 0.3. The floorboard according to any of the preceding claims, wherein the material of the insulating layer is expanded polystyrene. 6. Floor plate according to claim 5 or 6, wherein the expanded polystyrene comprises infrared absorber A floor plate according to any one of the preceding claims, wherein the wall of the sealed cavity comprises an emission reducing layer. 8. Floor plate as claimed in claim 8, wherein the emission-reducing layer is applied by coating, coating or painting. An insulated floor plate comprising an insulating layer, which insulating layer comprises at least one sealed cavity, the wall of the sealed cavity comprising an emission reducing layer with an emission coefficient of less than 0.5.