Building element for heat insulation

The invention relates to a structural element for thermal insulation between two structural elements, in particular between a building structural element and a protruding external element, consisting of an insulating body positioned between these two structural elements with reinforcing elements passing through it, attached to both structural elements, at least rods for transverse forces are provided as reinforcing elements, which inside the insulation body run essentially as inclined in parallel vertical planes for attachment to both elements of the structure are so bent in their upper course facing the load-bearing structural component and in their lower route facing the supported structural component that in the said vertical planes protrude horizontally from the insulating body at different heights.

[0002] Such construction shapes for structural components for thermal insulation have been used for a long time (see also EP-A0 609 545) and for this purpose have an insulating body usually 8 cm thick, which separates the protruding external elements, especially balconies, from the elements building construction, especially inter-floor ceilings, whereby this insulation body with a thickness of about 8 cm corresponds to the thickness of the external insulation, which was usually applied to the walls of the building. In recent years, however, the thickness of the outer insulation has been constantly increased as a result of the energy saving regulation, with passive houses having a insulation thickness of around 20 cm over time. It is obvious that known structural elements for thermal insulation with an insulation body thickness of only 8 cm do not meet the requirements for passive houses, which either protrudes completely from the protruding elements, especially balconies, or the deterioration of thermal insulation in the area of ​​external protruding elements is deliberately tolerated .

[0003] Based on this assumption, the present invention has the task of providing a structural element for thermal insulation of the kind mentioned at the beginning, which will be suitable for incorporation in passive houses, without thereby deteriorating static properties; because these bars for lateral forces achieve their optimal properties only when they are built in at an angle of about 45 ° - if this angle was made flatter to take into account the greater thickness of the insulating body, then the bar for lateral forces would be "softer" and could not meet the full statics requirements.

[0004] According to the invention, this task is solved in such a way that the structural element is adapted for incorporation in passive houses in such a way that the insulating body on the side facing the load-bearing element of the structure has a projection that leaves free recesses for the exit areas of the upper run of the rods for forces transverse from the insulating body, and which in the direction of the load-bearing structure element extends up to the areas of horizontally protruding rod sections for lateral forces, so that the sides completely overlap the bent sections of rods for lateral forces.

[0005] As a result, for the first time it became possible to provide an insulation body with a thickness required in passive houses of over 15 cm and especially around 20 cm, due to which a protrusion was added to the normal insulation body, which, for example, covers the thickness that is missing in relation to normal insulation body thickness 8 cm. In the area of ​​exit of individual bars for lateral forces in their upper course, this projection has a recess, which provides concrete wrapping of the bent course of bars for lateral forces and thus sufficient static support of the bars for lateral forces. Thanks to this, it is possible to maintain optimal orientation of the bar on lateral forces at an angle of 45 ° inside the insulating body, without significant deterioration of the thermal insulation on one side and the static function of the bar on lateral forces on the other. Also, the static properties of tension and compression bars, which are covered with insulating material throughout their entire thickness of over 15 cm, do not deteriorate significantly as a result of increasing their section not supported by concrete.

[0006] Preferably, the projection has a substantially parallelepiped shape and is fitted to the insulating body, having the same height and the same longitudinal extent, wherein the non-protruding exit areas for transverse forces form recesses that have approximately the shape of a partially cylindrical segment approximately a rectangular horizontal cross-section in the area of ​​bars for lateral forces. Thanks to this, an optimal connection of the flooded concrete in the recesses with the adjacent concrete element of the structure is guaranteed, and despite this it is possible to provide sufficiently stable anchoring of the rods to the lateral forces in the concrete.

[0007] If the total thickness of the insulating body, i.e. the thickness of the actual insulating body plus the thickness of the projection, is of the order of 20 cm, then for ordinary heights of building elements and insulating bodies of the same order of magnitude, this generally results in at least a square cross-section. [0008] Into non-projecting exit areas of the upper run of the rods for lateral forces, i.e. in the cavities of the insulating body, on the one hand, concrete mass from an adjacent load-bearing structural element can be poured at the construction site, the insulating body acting in the usual way as lost formwork ; however, it is also possible to fill the cavities with concrete with different material properties, especially high-strength concrete or special concrete. This is preferably carried out before building construction, especially at the construction site. By special, which in comparison to normal reinforced concrete has better thermal insulation, compensates for the partial reduction of the thickness of the insulation body in the areas of the recesses, which could mean a corresponding reduction in thermal insulation properties.

[0009] Further features and advantages of the present invention of the concrete element manufacturer use result from the following description of the embodiment based on the drawings that show

Figure 1 a thermal insulation construction element according to the invention in side view; and

Fig. 2 structural element for thermal insulation in top view.

[0010] The thermal insulation construction element 1 shown in figures 1 and 2 comprises an insulation element 2 with a shaped projection 3 of the same insulating material and several reinforcing bars passing through the insulation body, namely in the upper part of the insulation body tension rods 4 extending in the direction horizontal, in the lower part of the insulation element compressed rods 5 running horizontally and rods 6 for lateral forces, the rods for lateral forces have a generally inclined course 6b inside the insulating body in vertical parallel planes, and for attachment to two adjacent concrete elements of the structure are in areas 6d, 6e in such a way bent in their upper course 6a facing load-bearing a structural element and in their lower run 6c facing the supported structural element, that in the vertical planes they protrude horizontally from the insulating body at different heights.

[0011] The projection 3 is located on the side of the insulating body 2 which faces the load-bearing structural element, and has recesses 7 which are approximately the shape of a partially cylindrical segment and surround the upper exit area 6f of the inclined course 6b of the rods 6 for lateral forces and this way they leave free space for pouring concrete.

[0012] If we look at the top view of the structural element 1 shown in Figure 2, we can conclude that the projection 3 has depressions 7 only in the area of ​​the rods 6 for lateral forces, so that adjacent regions 7 of the projection 8, through which the tension rods run , overlap on the sides the bent sections 6d of rods for lateral forces. As a result, it is guaranteed that the insulating body 2 together with the projection 3 has a maximum thickness D, which accordingly improves the thermal insulation properties of this structural element. On the other hand, the cavities 7 filled with concrete ensure sufficient support of the rods 6 for lateral forces, whereby the unsupported inclined zone 6b of the rods 6 for lateral forces is correspondingly reduced and corresponds approximately to the order of magnitude found in traditional thermal insulation components whose insulating body has for example, only 8 cm thick. In this way, an order of magnitude corresponding to approximately half the length of the inclined rod run for lateral forces can be wrapped in and reinforced with concrete, while approximately the other half of the inclined run extends in the insulating body without additional support.

In summary, the present invention has the advantage of providing a thermal insulation construction element with clearly improved thermal insulation properties, at the same time with no reduction or only a slight reduction in static properties, in that the transverse forces bars in the main part of their inclined course are wrapped. and supported by concrete.

SCHOCK BAUTEILE GmbH Representative: