DE2331431A1 - Chemically hardened cellular-concrete partition walls - with use of pulverulent mixt. of ferrosilicon and calcium silicide as hardener - Google Patents

Abstract

By this method, the autoclave hardening is eliminated, whereby partition walls as large as desired can be cast in situ. The compsn. is sufficiently fluid to ensure elimination of cavities without any vibration treatment. Pipes, electric cables etc. can be incorporated without any pretreatment. The shrinkage is very small. The partition walls so produced do not require any surface treatment. The compsn comprises (in kg. per m3 of concrete): cement 300-450, sand 250-550, Al powder 0.4-0.7, ferrosilicon, calcium silicide and opt. silicides of rare earth elements 7-10; water is added in an amt. such that the water:cement ratio is 0.5-0.6. Vermiculite can be added for sound-damping.

Description

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ING. KARL EISEN 8900 AUGSBURG FLANDERNSTRASSE 44

Patent application no .:
Own file number: E 62/63

METHOD OF PRODUCING PARTITION WALLS .

The invention relates to a method for producing partition walls for buildings or the like by pouring concrete and such partition walls .

It is known to cast partitions from normal concrete. However, these walls have the disadvantage that they are heavy and heavy have poor thermal insulation; they are difficult to edit. That mixed material is relatively viscous, so that shaking is required when pouring and there is a risk of cavities.

Because of the high weight of the concrete, partitions are often made of smaller aerated concrete components, in particular more brick-like Stones or smaller plates built up. With this type of construction, however, additional treatment is required before painting or wallpaper is applied can be. Walls made of such elements are also very susceptible to cracking; they also have a high degree of shrinkage and the edge strength leaves something to be desired left over. This results in large tolerances that prevent the slots from being filled require.

June 8, 1973

409882/0221

The size of construction elements made from conventional aerated concrete is inevitably limited by the manufacturing process, since the elements have to be cured in an autoclave under steam at 12 to 15 atmospheres and 120 C for several hours. For reasons of cost, the size of the autoclave is limited so that large-area parts cannot be treated.

The object of the invention is to produce entire partition walls from aerated concrete. According to the invention, this is achieved in that these walls made of a chemically hardenable aerated concrete.

A powder mixture of ferrosilicon and cafcium silicide as well as silicides of the rare earths is advantageously used for chemical hardening.

Particularly good properties result from the fact that when mixed first the binder and the powder mixture are mixed with water.

The chemical hardening of aerated concrete has been known for a long time; However, it has so far only been used for the production of the usual building blocks, since it was not recognized that large-area partition walls can be produced as a whole in this way.

The manufacturing process is much easier than with normal concrete, because the material mixture is fluid, so that all cavities are filled without shaking; It is of particular advantage that electrical and / or Sanitary pipes, parts or the like can be poured in without pretreatment. The substances used in chemical curing go namely a corrosion-resistant connection with the iron, so that no pretreatment is required such as removal of rust film or the like is required.

The binding agent, powder mixture and aggregates are mixed preferably in a pressure flow mixer.

The individual Partition walls delimited by profile strips and, if desired, the electrical ones and / or sanitary pipes, parts or the like placed without pretreatment. The finished mixture is applied and after approx. 3 hours dosed and without other additions deducted. There are then finished partition walls with exact

S. June 1973

409882 / Ό221

Edges and minimal shrinkage.

3 The recipe per m of finished Rpren concrete is as follows:

Cement 300 to 450, preferably 400 kg per m Sand 250 bit 550, preferably 320 kg per m

3 Aluminum powder 0.4 to 0.7 kg per m

3 Powder mixture 7 to 10 kg per m

Wawer In an amount such that the water / cement factor is 0.5 to 0.6.

The powder mixture is known from Austrian patent 244 831 and under under the name Sequoia available from the manufacturer. The mixture contains in particular Ferrosilicon, Calcium SiHcid as well as Silicides of the rare earths, whereby one by Melting together of calcium, rare earths, Elsen and silicon obtained Mixture is used. The use of pure quartz sand, which is normally required for aerated concrete, is not necessary.

The chemical hardening, during which temperatures of up to 100 C arise makes autoclave curing superfluous.

The finished walls can be painted without further treatment or with Wallpaper can be provided. Since the corresponding electrical and / or sanitary lines, parts or the like are already cast in, the partition walls are particularly advantageous for a prefabricated construction.

Beeeariers to mention is that by adding specially treated Mica f ^ ermeculite) sound insulation of the walls can also be achieved.

In contrast to prefabricated concrete walls, these partition walls are also light edit xu; they have a relatively high level of fatigue strength as well a high adhesive strength that a composite construction with tiles or the like Allowed, efine that, as with conventional aerated concrete, the risk of breaking off As a result of sea breezes * exists.

June 8, If73

4098 82/0221

It should be noted that the inventive method the special Has the advantage that the partitions in a field factory, so directly on the Construction site can be made and not to a specific, selected Concrete plant is bound, as is the case today with another aerated concrete.

June 8th 1973

409882/0221

Claims (1)

PATENT CLAIMS :, 1. A method for producing partition walls for buildings or the like by pouring concrete, characterized in that an aerated concrete with chemical curing is used. 2. The method according to claim 1, characterized in that the chemical A powder mixture of ferrosilicon and calcium sulfide is added to harden the concrete mixture. 3. The method according to claim 1 or 2, characterized in that for the aerated concrete the following recipe is used per m ** of finished concrete: 3 cement 300 to 450, preferably 400 kg per m 3 sand 250 to 550, preferably 320 kg per m 3 Aluminum powder 0.4 to 0.7 kg per m 3 Ferrosilicon, Calcium! Licid. Rare earth silicides 7 to 10 kg per m Water in an amount such that the water / cement factor is 0.5 to 0.6. 4. The method according to claim 1, 2 or 3, characterized in that first the powder mixture and the binding agent, in particular the cement, are mixed with water and only then are the additives added. 5. The method according to any one of the preceding claims, characterized in, that a pressure flow mixer is used for mixing. 6. The method according to any one of the preceding claims, characterized in, that electrical and / or sanitary lines, parts or the like are poured in without pretreatment. June 8, 1973 409882/0221 233H31 7. Partition wall for buildings or the like, characterized in that that the partition consists of chemically hardened aerated concrete. 8. Partition according to the last claim, characterized in that that not pretreated electrical and / or sanitary lines, parts or the like are poured. 9. Partition according to one of claims 1 to 8, characterized in that that vermeculite, i.e. mica, is added to the sound insulation at high Temperature water was withdrawn. 10. The method according to any one of claims 1 to 6, or 9, characterized in, that the production takes place in a field factory. June 8, 1973 / / 409882/0221