SU958561A1 - Paper with cement setting inhibitor - Google Patents

Description

3958

adhesive composition and applying it on a paper base between its layers.

For example. Dry powdered components: dextrin, boric acid and carboxymethyl cellulose, pour water. With ne)) stirring, the slow-glue mixture is brought to a homogeneous, viscous mass. Then, a sheet of a retarder-adhesive mixture is applied to the sheet of paper, for example, a wrapping GC) CT 8273-75, with a brush, roller or rotating cylinder, on the surface of which another sheet of paper is gently pressed. Thus, both sheets of paper are glued together, and the composition which slows down the hardening of the cement is between CM. The paper is dried at room or elevated temperature. Suspended paper with a cement hardening inhibitor is used to open the textured surface of the products.

To compare the physicomechanical properties of the proposed paper and the prototype 6btao, several samples were prepared.

The proposed paper with a cement hardening inhibitor is characterized by the following indicators in comparison with the prototype.

The main difference of the proposed paper with a cement hardening retarder is that the use of an additional layer of paper eliminates the possibility of displacing the retardant-adhesive composition during the laying of the decorative concrete mix. The use of this retardant-adhesive composition allows to extend the time from the beginning of the laying of the finishing concrete to the window of vibrating to 60 miles, instead of 15 minutes by the prototype.

The use of the proposed paper with a cement hardening retarder makes it possible to significantly improve the quality of the exposed texture of products under the production conditions of exterior wall panels, where, as a rule, it is difficult to exclude the possibility of offsetting the decorative concrete mix during laying, and the final vibration time always exceeds 15 minutes.

Table 1

Carboxymethyl time from the beginning of laying

Example, N before the end of vibrocompaction, min

20

30 40

20 30

thirty

Table

Finishing surface quality

Quality is good, outcrop is even

Example.

Time from the beginning of laying to the end of vibropacking, min

Prototype Note

Claims (1)

Invention Formula A paper with a cement retarding agent, consisting of a paper base and a retarding-adhesive coating, characterized in that, in order to improve the quality of the paper, the paper backing is composed of two layers, and the slow-adhesive coating is placed between them and made from the following composition, May. including: Dextrin10 Borna acid 1-3 Continued table. 2 Finishing surface quality 20 30 35 Poor quality, more than 15 uneven Carboxymethylcellulose1-3 Water 20-40 Sources of nifccation taken into account during the examination 1. The patent of Germany N 1683806, CL. 80 1 24/05; 1970.Patent of Great Britain N 13378 4, cl. C 1 H, 1973. 3. Instructions for finishing the facade surfaces of panels for external walls, BCH 6689-76, M., 1977, p. 36-38 (prototype). In examples 1-5, the retardant-adhesive layer consumption per meter of paper is 50-55 g.