SU833902A1 - Method of finishing small-sized construction articles - Google Patents

Description

(54) METHOD FOR FINISHING SMALL CONSTRUCTION PRODUCTS

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The invention relates to methods for finishing prefabricated small building products and can be used for finishing asbestos cement and chipboard, aerated concrete inserts and stones.

A known method of applying a multilayer coating by cleaning the concrete surface, applying a colloidal cement glue and vibrating distribution of a hard sand mixture at a vibration frequency of 20-100 G and an amplitude of 1.5-3 mm. However, this method does not allow coating the surface of porous products. structure.

The closest to the invention to the technical essence and the achieved result is the method of finishing small-sized building products, including applying decorative crushed material to the surface of the product before or after applying the polymer-cement composition, sealing the finishing layer with clots: oh or rolling and curing it 123./

The disadvantages of this method are the necessity of priming and dedusting the surface of the products.

poor heat buildup of crushed material and short service life of the coating. In addition, the resulting finishing layer has a low adhesion to the product.

The purpose of the invention is to increase the adhesion of the finishing layer to the product, its water resistance and strength.

This goal is achieved by the fact that in the method of finishing small-sized

0 construction products, including the application of decorative crushed material to the surface of the product before or after applying the polymer-cement composition, sealing the plaster layer and curing it, compaction is carried out by vibrating the product with a frequency of 2500-3000 count / min and amplitude 0.3-0, 4 mm for 0.5-1 min.

0

Depending on the accepted sequence of application of the decorative crushed material and polymer-cement composition, various

5 types of finishes - Powder Decor, color textured and gleshkuyu with the exposure of crushed material.

To obtain a finishing layer, a polymer-cement composition is used, containing, in wt%:

0

Cement 50-54

Latex divinylstyrene SKS-65 Hz 18-19 Surfactant OP-7 0.5-1.5 Sand 16-17

Casein glue 9-11 WaterOther

For the powder, coarse aggregate is used - sand of a fraction of 2 mm, crushed stone of a fraction of 5-10 mm, glass chips of a fraction of 5-10 mm, brick side and marble chips of a fraction of 10 mm. Example. Mechanically, a polymer-cement composition containing, in wt.%; Cement50

Latex SKS-65GP 18 OP-70.5

Sand 16

Casein glue 9 Water6,5

and a layer of decorative crushed material, as well as a glass wall of a fraction of 10 mm, after which the product is vibrated at a standard vibro-tube. Before vibrating, the product is fastened around the perimeter with a vibro-tube. The vibrations are made with a frequency of 2500 col./min and an amplitude of 0.30.4 mm for 45 s. After vibrodischarge, the finishing layer is cured.

The physicomechanical parameters of the coating obtained by the proposed and known methods are presented in the table.

Way

Indicators

; -t;

Proposed Known I

Water absorption,%, at capillary suction in 24 hours

The strength of the finishing layer, kg / cm

Table continuation

Shedding crushed material at 250 cycles of saturation 15-25 with no-drying,%

Scattering of crushed material at 35 and 100 frost-resistant cycles 15, 35

0.0 bone%

Tests show high strength, adhesive and operational properties of decorative coatings with crushed material.

Claims (2)

1. USSR author's certificate No. 408927, cl. From 04 To 13/08, 1968, 2. Modern methods of decorative finishing wall panels in the factory. Technical information, review VNIIESM. M., stroiizdat, 1972, p.45.