DE1909251A1 - Plastic-coated concrete stone and cast stone or similar pieces, especially sanitary cast stone pieces - Google Patents

Description

Wolfgang and Joachim Rotter CASE E - 6/69

Berlin 27,

Soltauer Strasse 18/22

Werner Schlinsog
Allmenrod / Krs.Lau t erbach

" Plastic-coated concrete blocks""and concrete work pieces like the like, in particular pieces of sanitary concrete work stone "

It is known, for example, sanitary cast stone pieces such as washing tubs, shower trays or the like after the surface has been sanded leveled off and sanded again to achieve the best possible ™

closed, capillary-free surface that allows penetration of moisture and germs in the workpiece in question is prevented »This is, however, despite the most careful work so far failed. Even if you look at the sanded surfaces only applied a plastic coating film a few days later, so there were still fine, more or less large, needle pores.

After repeated coating with plastic, a closed surface was achieved in many cases, but in resp. bubbles on the cured coating layer even after weeks as soon as the workpiece is slightly heated, e.g. in a was brought to another room «These bubbles finally burst»

and left pores.

In addition, these coating films were more or less less effortlessly peeled off from the surfaces of the workpieces because the film does not have a firm and permanent anchoring to the workpiece received itself.

The reasons for this are in particular the following: Concrete and cast stone, for example, is known to be made with cement, water and the corresponding additives · Only part of the mixing water is chemically bound during the setting process. The greater part of the mixing water escapes after the

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Setting process through evaporation on the surface. The resulting cavities, called capillaries, run through it whole concrete or Piece of stone like a fine network of veins.

On the other hand, it is not possible to use concrete respectively. Making stone with only as much hater as chemical bonding is required, as this mass can then no longer be processed ο So capillary formation is inevitable

Many workpieces made of concrete or In addition, because of their shape, they can only be made of cast concrete using the vibration method produced what is in part a water cement factor from W / Z «0.5 required. During these shaking processes A myriad of air bubbles trapped in the mix, which are finely connected to the surface via the capillaries to have.

These and other disadvantages prevent the creation of an absolutely impermeable and, above all, permanently impermeable coating layer On the surface of the aforementioned concrete work pieces, the removal of which is the task of the present innovation is.

The solution to the above problem is characterized in that the leveled and smoothed cast stone Pieces warmed up to about 40 ° and then a primer plastic layer on top of them at normal room temperature while cooling is applied by multiple strokes, on which, after the primer-plastic layer has hardened, a another layer of plastic is applied.

The tied workpieces produced under normal room temperature are placed in a heating chamber and warmed up there to about 40 C throughout. The workpieces that have been heated in this way are then transferred to a work room at normal temperatures (18 - 20 C) and here using a brush, Spatula or other tool, coating maese, e.g. filled epoxy resins, applied to the surfaces.

The coated workpieces cool down very quickly in the work area, which is approx. 20 C cooler and are thus transferred to the

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The capillaries of the workpiece generate a negative air pressure that thus the overpressure of the outside air can take effect and that on the The plastic coating material applied to the surface reliably presses into every pore of the workpiece. By constantly re-coating the surfaces, the resulting Needle pores are constantly supplied with new coating material until the capillaries have filled. That can be done economically Carry out very efficiently, as you can always get several workpieces from the heating chamber and the man who carries out the coating now goes from one workpiece to the other and re-coated there where new needle pores show in the workpiece. -

The coating material is set so that it solidifies in about 30 minutes. During this time the workpiece has then also assumed approximately the barely temperature. This hardened and closed surface can then be applied using Spray gun apply the enamel-like coating compound without the slightest pores appearing. The workpiece then has an absolutely closed coating surface that is inextricably linked to the workpiece.

In the drawing is an exemplary embodiment in a partial section in a schematic sectional representation shown greatly enlarged, with the individual more or

less large aggregates _1 are bound by means of cement *

Sand mortar 2 · In this cement-sand mortar is the during The plastic layer 3 that has passed several times during the cooling process has penetrated, is firmly anchored in it and is on result in a closed film 4 on the surface) on this coating film 4 is now additionally the enamel-like one Beach sealing compound 5, e.g. filled epoxy resins, sprayed on.

It is particularly worth mentioning that the Coating primer 3, 4 penetrated capillaries by means of the negative pressure resulting from cooling β, if they solidifies after approx. 30 min, with the spray

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The coating film 5 to be applied by the pistol is an absolutely secure connection anyway because of the similarity of the materials • go · This confessional film «3-j5 is then as it was before previously mentioned, indissoluble and absolutely solid on the stone *

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Claims (1)

Claim Process for producing an absolutely impermeable coating the surfaces of concrete blocks and concrete blocks, characterized in that the leveled and smoothed concrete workpieces warmed up to about 40 C and then at normal room temperature during the Cooling on this one primer plastic layer is applied by multiple strokes, on which, after the primer plastic layer has hardened, a another layer of plastic, e.g. a filled epoxy resin layer, is applied. 009841/1 495 Blank page