SE453675B - DISTRACT-INDEPENDENT PERMANENT SLIDE SURFACE FOR SPORTS ACTIVITY OR TESTAMENT AND ITS PREPARATION - Google Patents

Description

35 453 675 ¿on the surface of which an adhesive is used which is common during street work. By spraying on water, a sliding surface was obtained which, in terms of grip, did not correspond to slippery conditions.

In particular with blocking wheels, a so-called "Rubbing effect" (Rubber effect), ie the wheels had for a short time displaced the water and adhered temporarily.

The use of semi-rigid coatings of a cavity-containing bituminous base skeleton, filled with a plastic-containing cement mixture, also did not lead to the goal.

Traffic training sites with sliding surfaces have also been built, the bituminous cover layers of which have been coated with one or more plastic layers. The sliding effect was at first very good, especially if the water intended for spraying was provided with surfactants. Depending on the type of plastic coatings, however, some significant shortcomings soon emerged. the covers of soft, elastic plastics underwent severe wear and tear and must be renewed frequently; the coatings of hard, rigid plastics showed a number of partially continuous cracks due to the different coefficients of expansion between the plastic coating and the bituminously bonded substructure.

The problem was therefore to develop for sporting activity or test purposes a weathering-independent permanent sliding surface consisting of a hydraulically or bituminously bonded substructure and a coating, which behaves like gloss when sprayed with water or aqueous solutions of known friction reducing agents. and is characterized by long life.

The problem was solved according to the invention by a coating applied to the clean, dry surface of the substructure of a mixture consisting of: 20 - 25% by weight of liquid epoxy resin, 11 - 18% by weight of special tar, 11 - 13% by weight of harder and 48 - 61% by weight of filler, which is divided into two layers, an adhesive layer 5 and a wear layer 8, between which is arranged a reinforcing layer 6 of plastic fibers and optionally a sprinkled layer of fine-grained sand.

The substructure adapts to the existing subfloor and should correspond to the guidelines for street superstructure. The same H 10 15 20 25 30 35 453 675 normally consists only of a frost protection layer 2 and a cement-bonded or bituminous support layer 3. Particularly advantageously, a complementary chip-rich bituminous cover layer 4 has been found to have a grain size of 8/11 mm. . Priming is superfluous, but can be used.

As a bottom layer 5 a 1 to 2 kg / m2 tar / epoxy resin coating is used and as a wear layer 8 a coating of ~ 1 kg / m2.

However, they can also differ from each other within the given limits. In normal cases, both layers have the same composition. serna. Between the two layers, as a reinforcing layer 6, there is a fabric, knitting or a grid of high-strength plastic such as, for example, polyester and nylon. The mechanical properties of the coating can be further improved by sprinkling the adhesive layer with quartz sand with a grain size of 0.1 - 0.3 mm.

As the epoxy resin, a low-viscosity resin is preferred, in particular one of bisphenol A, and as a hardener a low-viscosity, long-chain polyaminoamide based on natural and dimerized fatty acids with polyalkylamines, optionally in combination with additional hardeners e.g. on an amine adduct basis.

As a tar component, epoxy resin-compatible special tars of the kind also used for the production of corrosion protection and adhesion layers for steel bridges are used in particular.

As fillers, all very fine-grained, dusty fillers and their mixtures can be used in the construction of streets, in particular a mixture of 2 parts by weight of carbon black, 6 to 9 parts by weight of microcrystalline talc and 40 to 50 parts by weight of quartzite flour 0.01 mm.

The figure shows an example of the construction of the permanent sliding surface according to the invention with a bituminous substructure. applied the antifreeze layer 2. the bituminous support layer 3, which is covered with a bituminous cover layer 4. In the adhering layer 5 thereon, a special weaving mat is laid as reinforcement layer 6 of On the substrate 1 is then follows polyester fiber and quartz sand has also been sprinkled over it.

The whole is covered with a smooth wear layer 8.

The production of the permanent sliding surface is explained in more detail with a concrete example, without any restriction being made with regard to the stated dimensions and quantity ratios. 10 15 20 25 30 35 453 675 Example: A 22 cm strong antifreeze layer 2 is applied to the substrate 1 and compacted. In addition, according to the guidelines for street superstructures, a 5 cm strong bituminous support layer 0/32 3 and a 3 cm strong chip-containing, bituminous cover layer 8/11 4 are installed.

Loose particles, oil residues, cement sludge and the like- Make sure that the surface is clean in each case. must be carefully removed before applying the adhesive layer 5, which consists of 1 kg / m * of a tar / epoxy resin combination having the following composition: 23% by weight 2% by weight 6% by weight 43% by weight 14% by weight % 12% by weight of low viscosity epoxy resin on bisphenol-A base carbon powder filler, e.g. magnesium silicate fillers, e.g. quartz flour special tar ~ hardener mixture, e.g. polyaminoamide and amine adduct hardener.

The mixture is poured onto the substructure at an outside temperature of at least 15 ° C and distributed with rubber razors. Of course, the same can also be sprayed with or without pressure.

In the still wet adhesive layer S, a polyester fabric 6 with a basis weight of 80 g / m ”is inserted in such a way that a uniform coverage is achieved with the mixture. The surface is sprinkled with quartz sand 7 with a grain size of 0.1 to 0.3 mm. In addition, 2 kg / m2 of the same tar / epoxy resin combination as for the adhesive layer 5 are sprayed as a wear layer 8 and made to harden.

The weathering conditions are of crucial importance for the installation of the cover layers. Dry weather is a prerequisite. The relative humidity should be below 85% at an air temperature of at least 15 ° C.

As numerous experiments have shown, the process described in the example can produce permanent sliding surfaces, on which gloss-like conditions are achieved by spraying water, aqueous solutions of substances to reduce the coefficient of friction and similar liquids. The coating has also been shown to be insensitive to weathering and abrasion resistance.

Claims (7)

10 15 20 25 30 35 5 453 675 PATENT CLAIMS 1. Permanent sliding surface consisting of a hydraulically or bituminously bonded substructure and a coating, characterized by a coating on the clean, dry surface of the substructure of a mixture of 20 - 25% by weight of liquid epoxy resin 11 - 18 weight -% special tar 11 - 13% by weight hardener and 48 - 61% by weight filler, which coating is divided into two layers, an adhesive layer (5) and a wear layer (8), between which a reinforcing layer (6) is arranged of plastic fibers and possibly a sprinkled layer (7) of fine-grained sand. Permanent sliding surface according to claim 1, characterized by a substructure consisting of a root protection layer, a cement-bonded or bituminous support layer and a chip-rich, bituminous cover layer (4) with a grain size from 8 to 11 mm. Permanent sliding surface according to Claim 1, characterized in that the adhesive layer (5) consists of 1 to 2 kg / m 2 and the wear layer (8) of 1 to 3 kg / m * of a combination of tar and epoxy resin. Permanent sliding surface according to claim 1, characterized by a reinforcing layer (6) of a grid or a mesh-like fabric of high-strength plastic. n a d a v Permanent sliding surface according to Claim 1, characterized in that the liquid epoxy resin used in the mixture is based on bisphenol A and the hardener is a low-viscosity, long-chain polyaminoamide based on natural and dimerized fatty acids with polyalkylamines optionally in combination with further harder . Permanent sliding surface according to claim 1, characterized in that a filler mixture of 2 parts by weight of carbon black 6 - 9 parts by weight of micronized talc and 40 - 50 parts by weight of quartzite flour. I 10 453 675 Method for producing a permanent sliding surface according to claim 1, characterized in that after installation of the substructure according to the guidelines for street superstructures, the adhesive layer (5) is applied to the dry, clean surface of the substructure at a relative humidity not higher than 85% and an air temperature of 2 15 ° C, that the reinforcing layer (5) is applied to the surface and incorporated into the adhesive layer (5), until it is completely covered by the mixture, the whole is sprinkled with quartz sand 0.1 to 0, 3 and the reinforcing layer (8) is sprayed over it.