DE29706681U1 - Exterior wall construction - Google Patents

Description

PATENT AND LAWYERS MEINKE ₁ DABRINGHAUS UND PARTNER GbR

ADMISSIONED AT THE EUROPEAN PATENT AND TRADEMARK OFFICE EUROPEAN PATENT AND TRADEMARK ATTORNEYS'

PATENT ATTORNEYS·

JULIUS MEiNKE, DiPL-ING. WALTER DABRINGHAUS, dipl-ing, JOCHEN MEINKE, dipl-ins.

LAWYER

THOMAS MEINKE

WESTENHELLWEG 44137 DORTMUND

TELEPHONE (0231) 14 50 FAX (0231)14 76

PO BOX 10 46 45

44046 Dortmund, 15 April 1997

DRESDNER BANK AG DTMD, Account No. 1 148 047 (bank code 440 800 50) POSTBANK DORTMUND, Account No. 642 02-463 (bank code 440 100 46)

FILE NO.,

&igr;. 5/13116 D/Dr

Applicant: Deutsche Pittsburgh Corning GmbH Mallaustraße 57. 68219 Mannheim

'Exterior wall construction'

· I

'Exterior wall construction'

The invention is directed to an external wall structure of a building with at least one concrete layer facing inwards. The term "external wall structure" refers to all wall structures that are provided with thermal insulation and sealing, i.e. not only basement walls are affected, but also floor slabs or ceiling surfaces, for example of underground garages, but also concrete roof surfaces of roofs to be greened, etc.

In buildings, it is known to make the floor slab or foundation slab, as well as side walls, e.g. basement walls, underground garages, etc., out of concrete, whereby the applicant is aware of making a foundation slab and/or a concrete wall out of normal concrete or, depending on the area of application, out of waterproof concrete (WU concrete), with a separating layer facing outwards, e.g. a PE film, and again a thermal insulation layer facing outwards, which rests on a layer of gravel that is applied to the local soil.

There are basically three types of sealing technology:

Version 1 - Black tub

In this case, a bituminous building waterproofing is formed in accordance with the water load DIN 18195 Part 4 load case capillary water bound in the soil, DIN 18195 Part 5 load case seepage water , DIN 18195 Part 6 load case pressing water.

Version 2 - White tub

In this design, concrete of a special quality is formed as a water-impermeable concrete structure. In water-impermeable concrete (known as waterproof concrete), a significantly higher proportion of steel reinforcement is used so that the formation of shrinkage cracks is reduced to a significantly lower level. According to DIN 1045, a crack width of 0.2 mm is permissible for reinforced concrete (normal concrete without waterproof properties). In water-impermeable concrete (water-impermeable concrete), according to recognized rules of construction technology and guidelines of the German Committee for Reinforced Concrete, a maximum crack width of 0.10 to 0.15 mm is permissible, depending on the immersion depth of the structure. Waterproof concrete structures, however, have a certain disadvantage in that moisture can diffuse through the structure and increase the humidity of the air inside the room to a greater extent.

For example, interior floor coverings cannot be laid directly on waterproof concrete slabs.

They cannot be applied directly to the floor, but must be constructed as ventilated floors, which is very complex. Additional structural measures are also required for waterproof concrete walls.

Version 3 - Brown tub

In such a construction, a swellable seal based on bentonite is arranged on the outside. This design has also been on the market for some time.

Since water-impermeable concrete structures are very expensive, not least because of the increased steel insert to minimize shrinkage cracks, the object of the present invention is to create a soil/external wall structure of a building that combines the advantages of external insulation facing the soil with a concrete structure.

With a wall structure of the type described at the beginning, this object is achieved according to the invention in that the concrete layer is provided with a layer of bentonite facing outwards and this in turn is provided with a pressure-resistant thermal insulation layer.

In an embodiment, it can be provided that a layer of compacted soil is assigned to the pressure-resistant thermal insulation layer facing outwards.

··

5 -<

A special further embodiment of the invention consists in that the concrete layer is designed as a water-impermeable concrete layer with a steel reinforcement of a normal concrete layer, which is made possible by the pressure-resistant thermal insulation layer claimed here with a swellable bentonite seal.

The thermal insulation layer is expediently designed as a foam glass or as an extruded polystyrene rigid foam insulation layer, as the invention also provides in a further embodiment.

In principle, all thermal insulation materials can be used here that are approved or suitable for external soil and building insulation, although foam glass insulation materials are particularly suitable.

These insulating materials, like the bentonite expansion material seal, can be designed as panels or sheets, whereby the bentonite seal can also be designed as a fill.

The invention is explained in more detail below with reference to the drawing, which shows a simplified representation of a wall structure according to the invention.

The wall structure, generally designated 1, of a building not shown here in detail consists in the example shown

example, a concrete layer 2, a bentonite layer 3 on the outside and, following this on the outside, a layer 4 made of a pressure-resistant thermal insulation material, such as foam glass. The layer of pressure-resistant thermal insulation material 4 is surrounded by a layer 5 made of compacted soil, which is also indicated in the figure.

What is important here is that the concrete layer 2 is designed as a so-called waterproof concrete, but with steel reinforcement of a normal concrete or, in other words, a waterproof concrete with crack-limiting reinforcement of only 0.2 mm. The bentonite layer 3 is designed as a swelling material seal.

It is also clear that thermal insulation in building construction, which according to DIN 4108 must be arranged on the inside in order not to lose thermal insulation effect due to the effects of moisture, can be dispensed with here, since the foam glass insulation layer 4 provides external thermal insulation taking into account the thermal insulation value.

Claims (6)

Expectations: 1. External wall construction of a building with at least one inward-facing concrete layer, characterized, that the concrete layer (2) is provided with a layer (3) of bentonite facing outwards and this in turn is provided with a pressure-resistant thermal insulation layer (4). 2. External wall structure according to claim 1,
characterized, that a layer of compacted soil (5) or similar load is assigned to the pressure-resistant thermal insulation layer (4) facing outwards. 3. External wall structure according to claim 1 or 2, characterized in that that the concrete layer (2) is designed as a water-impermeable concrete layer with a steel reinforcement of a normal concrete layer. 4. External wall structure according to one of the preceding claims, characterized in that the pressure-resistant thermal insulation layer (4) is designed as a foam glass or as an extruded polystyrene rigid foam insulation layer. 5. External wall structure according to one of the preceding claims, characterized in that the bentonite layer (3) is arranged on the outside of the thermal insulation layer. 6. External wall structure according to one of the preceding claims, characterized in that a load that can be removed in layers is arranged on the bentonite layer (3).