SU1418323A1 - Mortar mixture for finishing work - Google Patents

Abstract

The invention is intended for cladding wall surfaces with plasterboard and gypsum-fiber boards, for sealing joints between them, as well as for filling plasters of brick surfaces. The purpose of the invention is to improve the adhesion strength. The building mixture for finishing works contains, in wt.%: Gypsum 86.4-89.5, sodium carboxymethylcellulose salt 0.25-0.35; alkali metal tripolyphosphate 0.25-0.3; fluorine alkyl sulfates or sulfanol 0.15-0.2; pearlite sand 3.3-3.6; 50% on the phenylpolyethoxyloxane emulsion 3,3-i 3,4; quartz sand - the rest. The strength of adhesion of building mix with concrete is 0.35 MPa. 1 tab. (L

Description

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Yu

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The invention relates to construction and finishing works, in particular, to the implementation of cladding surfaces of walls and partitions with gypsum plasterboard and gypsum-fiber boards under the conditions of maximum industrialization of work, and can be used to prepare mastic for gluing gypsum-cardboard plates, sealing joints between slabs, as well as for filling irregularities and plastering brick surfaces.

The purpose of the invention is to increase adhesion strength.

Preparation of building mixture for finishing works is carried out in the following sequence.

All components of the mixture (with the exception of gypsum and phenyl polyethoxyloxane) are thoroughly mixed and gypsum is added to obtain a dry mixture, which is sealed with water containing phenyl polyethoxy silane.

: The specific composition of the mixture and their physico-mechanical properties are given in the table.

In the proposed mortar, both ordinary gypsum and previously ground gypsum with a specific surface area of 6000-8000 cm2 / g can be used.

When cladding surfaces with plasterboard sheets using dry construction mixture for finishing work from this mixture, the glue is applied to the adhesive mastic. The preparation and the introduction of this mastic is carried out with the help of a machine that is installed on the floor in a building near the room to be trimmed. Dry construction mixture is poured into the bunker, which is gradually fed by a scraper to the mixing compartment, where water is supplied from the water supply network. The machine is equipped with a device that automatically adjusts the amount of water supplied. The water-shaken mixture is supplied to the nozzle, with the help of which it is applied to the surface in the form of strips 20 cm wide with a step of m

The setting time of the mastic (60- 90 min) allows it to be applied to the area under the 4-5-sheet sticker, ensuring the front of the cladding. In this case, a .85% mastic is applied by machine to the surface to be coated.

with -

five

and the remaining 15% with the aim of quickly fixing the sheets with a nozzle is pumped into a container, where it is mixed with an additional amount of gypsum (about 5% of the total demand) and mixed manually for 0.5-1 minutes. The setting time of such mastic does not exceed 10-15 minutes. The resulting mastic is applied manually in the image, about 3-4 lozenges, along the central axis of the sheet during its installation.

Each set sheet align under the rule with the previous one. After installing 3-4 sheets, flush the entire surface. Further, the sequence of operations is repeated. The work is carried out in a continuous-cycle method by the four links of workers.

The introduction of phenylpolysotoxiloxane into the dry mixture provides a reduction in the period between the onset of setting and the hardening of the mixture. This reduces the duration of filtration time of chemically unbound water into the cardboard sheet of dry plaster.

The combination of manual and mechanized operations for veneering with dry plaster using the proposed composition and sequence of operations completely eliminates the negative effects of substances that are introduced into the gypsum composition to ensure a long delay in setting time -providing the use of pure gypsum solutions and mechanized technology their application when finishing surfaces with dry plaster.

Ф о р. m lu invention

The building mixture for finishing works, including gypsum, sodium carboxymethyl cellulose, an alkali metal tripolyphosphate, secondary alkyl sulfates or sulfanol and tsevy sand, characterized in that, in order to increase the adhesion strength, it contains additional. perlite sand and a 50% emulsion of phenyl polyethoxyloxane in the following ratio, wt.%:

Gypsum 86.4-89.5

Sodium salt

carboxymethylcellulose 0,25-0,35

Tripolyphosphate

alkali metal

Secondary alkyl sulfates or

sulfanol

Perlitic sand 50% emulsion of phenipolyethoxy-loxane Quartz sand

The content of components, wt.%

sodium carboxymethylcellulose

Alkali metal tripolyphosphate

secondary alkyl sulfates

50% Phenyl Polyethoxyloxane Emulsion

quartz sand perlite sand property

setting time, min

Claims (1)

Claim Construction mixture for finishing work, including gypsum, sodium carboxymethyl cellulose, alkali metal tripolyphosphate, secondary alkyl sulfates or sulfanol and quartz sand, characterized in that, in order to increase the adhesion strength, it contains additional. perlite sand and a 50% emulsion of phenylpolyethoxyloxane in the following ratio of components, wt.%: Gypsum 86.4-89.5 Sodium salt of carboxymemethyl cellulose '0.25-0.35 3 1418323 4 Alkali metal tripolyphosphate 0.25-0.3 Perlite sand 50% emulsion 3.3-3.6 Secondary alkyl phenipolyethoxy sulfates or 5 loxane 3.3-3.4 sulfanol 0.15-0.2 Quartz sand Rest Gypsum 86.4 88.3 89.5 77.0 93.9 carboxymethyl cellulose sodium 0.35 0.3 0.25 0.1 2 alkaline tripolyphosphate metal oh s 0.3 0.25 0.1 0.8 secondary alkyl sulfates 0.15 0.2 0.2 0.01 0.2 50% phenyl emulsion polyethoxyloxane 3,5. 2.6 2.0 - - quartz sand 3.4 3.4 s, s 22.79 5.1 perlite sand 5.9 4.9 4,5 - - Properties setting time, min Start 90 90 86 92 90 end 95 96 97 112 111.5 strength, MPa adhesion to concrete, in compression 0.35 2,5 0.35 3.0 0.35 3.0 0.2 2,3 0.21 2,8 bond strength with cardboard Separation on cardboard Separation at the seam Note. In compositions 1 and 2, tripolyphosphate is used, and in composition 3, potassium tripolyphosphate. sodium VNIIIPI Order 4127/27 Circulation 594 Subscription Custom polygr. ave, city of Uzhhorod, st. Project, 4