SU804601A1 - Polymer-cement mixture - Google Patents

Description

(54) POLYMERCEMENT MIXTURE

one

The invention relates to polymer-cement mixtures used for decorative finishing of the front surfaces of wall panels of blocks and other building structures, including under factory conditions, when the processes of molding and decorative finishing are combined.

Known polymer-cement mixture for flooring, including, by weight.h .:

Polyvinyl acetate emulsion 0.1-0.2

Portland Cement1

Latex 0,01-0,02

Quartz sand 1,5-2,5 Water 0-0-0, b 1

Closest to the invention in its technical nature, and the result achieved is polymer mixture to form a decorative layer, including weight. % t

Portland cement. White 15-16 Polyvinyl acetate; emulsiyu7-8

60-70 quartz sand. Organo-organic compound .0.7-0.9

Lime9-10

Hsive mica 0.4-0.5 Titanium dioxide 1.5-2.0 CzJ. The disadvantages of the known immermine mixture are the extended terms of the beginning and end of setting, the content of quartz sand in the composition of the mixture, which reduces its adhesiveness and adhesion properties, eliminates the possibility of forming a finishing layer with a thickness of 1-2 mm.

The purpose of the invention is to increase the strength, water resistance, frost resistance and adhesion to the concrete of the decorative layer,

reduction of its shrinkage and acceleration of the setting time.

This is achieved by the fact that the polymer-cement mixture to obtain a decorative layer when molding concrete

in reinforced concrete, including portland ceramics, white polyvinyl acetate

| weight, P1

Portland cement white 70-90

Polyvinyl acetate emulsion 1.0-4.0

Ethyl silicate 0.5-2.0

Disintegrating slag produced by structural steels 7.5-22.5, Semi-aquatic gypsum 2.5-7.5

The finishing layer has a white color. It is given to the finishing layer. Color SiOg and ° C ° -Pr

6.13 40.42 51.9 2.98 0.49 0.10 0.43 0.03 Slag in combination with semi-aquatic gypsum provides fast setting and initial strength of the finishing layer, is an extension of the additive, which eliminates shrinkage increases the density, strength, water resistance and increases the adhesive properties of the finishing layer. Ethyl silicate increases the water repellency properties, water resistance and reduces the water absorption of the coating. The water repellent properties of the finishing layer eliminates the formation of efflorescence, increases the resistance of the coating film to contamination, which is a particularly important factor in the construction of buildings in large cities and advanced centers. The components of the finishing layer are mixed with water in standard mortar mixers until a homogeneous mass is obtained with a mobility of 7–9 cm along the conic of the CIVIL. To do this, first polyvinyl ethyl silicate emulsion is introduced into the water. Examples of the composition of polymer-cement mixtures, parts by weight;

Setting time, min start 5 11 19

end9 18 28

compression strength,

MPa:

in air-dry condition 25., 7 22.15 19.8

in water-saturated

conditions 19,0 16,3 14,0

alkali-resistant pigments can be added to it.

The spent slag produced by structural steels upon cooling is disintegrating into powder with a specific surface area of up to 2000.

The chemical composition of the slag is characterized by the table. one.

Table 1

80, 260

13.3 3.1 Portland white cement90 80 70 Polyvinyl acetate emulsion 1.0 2.0 4.0 Ethyl silicate-40 0.5 1.0 2.0 2.0 Disintegrating slag structure7, 5 15.0 22.5% steel Semi-aquatic gypsum 2, 5 5,0 7,5 Prepared polymer cement mixture is used to obtain a decorative layer during the molding of concrete products. A layer of special lubricant, such as silicone petrolatum, is applied to the cleaned inner surface of the molds. After the drying of the lubricant, a decorative layer of polymer-cement mixture with a thickness of 1-4 mm is applied to it by filling or by pneumatic spraying, depending on the purpose of the products and the conditions of their operation. After the facial layer cures in 5-30 minutes, depending on the existing technology, a series of concrete mix is laid on it and the product is molded according to the known technology. The test results of the proposed polymer-cement mixture are given in table. 2 Table2

Indicators

Claims (2)

100 100 100 Claims of the Invention Polymer-cement mixture for obtaining a decorative layer during the molding of concrete and reinforced concrete products, including white Portland cement, polyvinyl acetate emulsion, silicone compound and mineral filler, in order to increase strength, water resistance, frost resistance and adhesion to concrete decorative layer, reducing its shrinkage and speeding up the setting time, it contains ethyl silicate as the silicon-organic compound, and The bodies of the disintegrating slag produced by the production table. 2 2.2 1.95 1.8 1.2 40 0.23 0.32 0.4 0.45 stakes per pr no. No. (prucial stitches and semi-aquatic ps in the following ratio of rooms, parts by weight: Portland white 70-90 Polyvinyl acetate emulsion 1, 0-4.0 Ethyl silicate 0.5-2.0 Disintegrating slag of structural production steels 7.5-22.5 Semi-aquatic gypsum 2.5-7.5 Sources of information, which are closely taken into account during the examination 1. Author's certificate of the USSR 392037, class C 04 B 25/02, 197i. 2. Authors certificate USSR 391097, cl. From 04/25/02, 1971 rototype).