CZ15717U1 - Garden ceramics of polymer concrete - Google Patents

Description

Technical field

The technical solution relates to garden ceramic made of polymer concrete, whose main part is washed quartz stone.

⁵ BACKGROUND OF THE INVENTION

Garden ceramics, such as pots, jardiniers, sculptures and other decorative items, are traditionally made of ceramics, in the case of large-sized articles, plastics with appropriate mechanical and chemical properties are increasingly being used for this purpose, or suitable composite materials. For example, DE 4118027 discloses a cellular concrete composition that is prepared by mixing cement, sand, and styropor with water containing chemical plasticizers, and then introducing polyester fibers into the mixture.

The air enriched mixture is then applied to the mold or to the surface to be treated by means of a spray device. Patent CZ 284303 discloses building blocks imitating natural stone and the method of their production, according to which 55 to 90 parts by volume of quartz sand are fillers,

10 to 45% by volume of white Portland silicate clinker cement, up to 3 parts by volume of dye and up to 5 parts by volume of water are mixed into a moist non-flowing mixture and choked into the mold. After hardening and stabilizing the shape, the obtained blank is taken out of the mold and repeatedly immersed in water.

The essence of the technical solution

The essence of the technical solution is a garden ceramic made of polymer concrete, consisting of a binder and a filler in a weight ratio of 1: 15 to 25, where the filler is a float stone with a grain size of 2 to 12 mm with a density of 2000 to 2600 kg / m ³ and the binder is based on blends of polyester resin with aluminum hydroxide.

For smaller garden ceramics, the fraction of filler grains of 2 to 5 mm is preferred, for ceramics of larger sizes the filler fraction is 5 to 12 mm.

An aluminum hydroxide fraction with a grain size of 0.1 to 0.5 mm is preferred.

Example of execution

Washed stone from Horní Bříza sand quarry, a fraction of 2 to 5 mm was left in a low layer in the sun for the sake of drying, and after drying it was free of sand, larger coins and dirt on the sieve screens.

To 10 kg of purified stone, 361.3 g of polyester resin are weighed into a volumetric flask and 2.5 g of gelatin accelerator are mixed. 118 g of aluminum hydroxide is then poured into the mixture thus prepared and mixed to form a slurry of yellowish color. 3.5 g of polyester resin hardener is added to the slurry and stirred until it reacts with the resin.

Once the mass has grayed out (the beginning of gelatinization), the binder must be quickly mixed.

A 25 L polyethylene container is used to mix the binder with the cleaned stone, which should have a temperature of at least 18 ° C. Care should be taken to ensure that all the stones are covered with a microscopic layer of binder after mixing.

The mixed mixture is evenly poured into the mold placed on the vibrating stand. By vibration, there is mutual shaking and the contact surfaces between individual stones are increased and thus the rigidity of the whole product is increased. After 40 s, the mold is removed from the vibrating stand and allowed to cure at a temperature of at least 20 ° C. After 1 hour, the mold is disassembled and the product is removed. In order to facilitate removal of the product, it is advantageous if a separator, for example a silicone sealant, is applied to the mold working surface beforehand.

-1 CZ 15717 Ul

To complete the gelation and final cure, the product must be heated in an oven to about 90 ° C for 3 hours. This not only cures the product, but also eliminates unwanted odors and eliminates the residual tack of the insufficiently cured resin.

In the case of containers, the inner side is wiped with a leveling compound for possible waterproofing.

Claims (3)

. 5 Claims for protection Garden polymer made of polymer concrete consisting of a binder and a filler in a weight ratio of 1:15 to 25, characterized in that the filler is a float stone with a grain size 2-12 mm with a density of 2000-2600 kg / m ³ and a binder is based on a mixture of polyester resin with aluminum hydroxide. Polymer concrete garden ceramics according to claim 1, characterized in that for large products the filler grain size is 5 to 12 mm, for smaller products the filler grain size is 2 to 5 mm. Polymer concrete garden ceramics according to claims 1 and 2, characterized in that the aluminum hydroxide has a grain size of 0.1 to 0.5 mm. End of document