SU654591A1 - Method of finishing reinforced concrete articles - Google Patents

Description

(54) METHOD FOR FINISHING CONCRETE PRODUCTS

The invention relates to the industry of building materials and can be used in the manufacture of reinforced concrete products with an irregular surface.

The known method involves obtaining an invoiced surface of concrete products, in which imitation of a relief structure is achieved by applying a layer of organosilicon compounds of contrasting colors and exposing thin jets of compressed air with a pressure of 0.5-3 MPa at an angle of 45 - EO to the direction of the jet ij.

The manufacture of such products involves the use of special equipment.

Closest to the invention is a method for the surface treatment of reinforced concrete products by applying a polymerizable composition to the surface of a layer, applying a film to it, which has little adhesion to the composition, for example cellophane, and polymerization 2j.

However, this method does not allow to obtain a decorative-relief textured surface.

The purpose of the invention is to reduce energy consumption and obtain a relief texture.

This is achieved by the fact that with the method of finishing reinforced concrete products by applying a polymerizable composition to the surface of the layer and laying an anti-adhesive film on it with subsequent curing, the finishing layer is cured with a pressure of 10 to 200 g / cm. Pressure is created by stacking products one on another.

five

The essence of the method is as follows.

Liquid polymerizable liquid is applied onto the surface of products with the help of a brush, roller or roller.

0 composition of the following content, parts:

100

Polyester resin PN-1

Benzoyl peroxide

-2.5

1 Dimethylaniline 0.1

-0.5

5 Fillers (powders, PeDo 300 juice, etc.)

The thickness of the applied layer is 0.3–30 mm.

Then the surface with the applied composition is covered with a film with low adhesion to the composition, for example cellophane, polyethylene, and a uniform pressure of 1.0-200 g / cm-1 is transferred to it before the composition is cured.

This composition cures without heating at a temperature of about 30 ° C and without access of air for 5-30 minutes.

Before the load is applied, the layer covered by the film is under the influence of adhesion forces on the surface of the product and the film.

The reported pressure will be substantially greater than the weight of the film and layer, but at the same time less than the surface tension force at the interface between the layer and the product and the film. As a result, the liquid composition is practically not pressed out from the surface of the product, but is in a stressful state under external load.

When the polymerizing composition sets and hardens, its contraction (compression) occurs, as a result of which the stress state changes, Contraction stresses begin from a certain moment, exceed external loads, due to which the hardening composition takes directionally wavy relief. Polyethyne10 0.05 1.6 0.5-3 Lenova thin The same 20 0.1 1.2 1.5-4-4 200 1 I I 1 20 0.2 0.2 4 100. .f 200 0/25 5 150 Cellophane 20 0.4 Polyet20 0.15 0.8 3.6 Lenova thin

The depth, linear dimensions and nature of the relief can vary depending on the magnitude of the external pressure, the properties of the composition and film, the rate of curing of the composition determined by the initiating system, and other factors.

External pressure can be achieved by stacking products one on another through a common film.

Example. A polyester composition with a thickness of 1 mm is applied to the surface of the reinforced concrete product, after which a cellophane film is laid on it and cured with a simultaneous application of pressure 10 Oh / cm. The finished product has a coating with a relief texture.

The characteristics of the obtained coatings are given in the table from which it is clear that the use of a thin film and an overpressure of 10–300 gf / cm is most preferable.

The proposed method is simple in execution, does not require special equipment.

Claims (2)

Products processed by this method have a very attractive various relief surface. Compositions based on polyester and other resins, which have good adhesion to concrete, provide the best results. The relief is small, the coating is uneven The relief is small, the coating is of high quality 0.8 5-10 The quality coating with large pattern 0.6 4-6 The quality coating 0.6 2-10 The relief is indistinct The relief is clear, the quality coating 5 Invention 1. Method of finishing reinforced concrete products by applying a polymerizable composition to the surface of the layer and depositing an anti-adhesive film on it, followed by curing, characterized in that, in order to reduce energy costs and to obtain a relief texture, the curing of the finishing layer is carried out with the application of The pressure is 10 - 200 gf / cm, 45916 2. The method according to claim 1, which is based on the fact that the pressure is created by stacking the products one on another, Sources of information taken 5. into consideration during the examination 1. USSR author's certificate No. 348538, cl. From 04 to 41/40, 1970. 2. USSR author's certificate Yu No. 125506, cl. From 04 To 41/28, 1954.