Asbestos-cement product

FIELD: construction.

SUBSTANCE: asbestos-cement product with a protective decorative coating comprises an asbestos-cement base with front and rear surfaces and a protective-decorative coating applied onto them. In order to increase operational characteristics and to reduce manufacturing cost, the protective-decorative coating is arranged on the front surface in the form of serially applied glue composition and decorative grit fill, and has thickness of 0.35-3.0 mm, besides, the maximum size of fill particles makes 0.25-1.0 of the coating thickness.

EFFECT: improved operational characteristics and reduced cost of applying a protective-decorative coating.

8 cl, 3 dwg

 

The invention relates to the production of building materials, particularly asbestos cement products for roofs and facades, internal elements and other works.

It is now widely produced by domestic industry asbestos-cement products for roofs and facades of buildings and structures do not meet the aesthetic requirements of the species and do not provide sufficient operational durability. In this regard, quite active work is underway to remedy these disadvantages by performing on their surface protective and decorative coatings (see Kazantsev, S., ALEXANDER Smelkov, Korneev BP Asbestos product with protective and decorative coatings based on waterborne paint compositions. Building materials, No. 8, 1992, C-15).

Carried out in this way coverage do not resolve to the full extent of these problems, due to insufficient adhesive strength of the coating, the low resistance of coating compositions of the coating materials. To this we must add the inevitability of significant internal stresses arising due to the different coefficients of linear expansion of asbestos products and the applied layer, and the effects of changes in water content in the porous body of asbestose the enta, which leads to the warping of the sheets and their exfoliation.

Also known asbestos products from the supporting layer and decorative layer, is made in the form of a thin polymer film. Between the film and the carrier layer is an intermediate layer of adhesive. Ready-asbestos product Packed film is subjected to pressing and heating (2136937, CL IS 2/00, 1973).

The implementation of protective and decorative layer of vapour barrier film leads to the warping of the product and is generally characterized by the disadvantages described above.

A close analogue to the claimed invention to the technical essence and the achieved result is asbestos-cement products, mainly for the roof of a building or structure consisting of a base layer made of asbestos cement and decorative layer-based paint compositions (1256493, CL EO 3/18, 1971).

A disadvantage of the known solutions is that the protective and decorative layer is applied to the base layer of traditional techniques, such as brushing, dipping in the coloring solution, spraying, which significantly increases the time of manufacturing the layered product. In addition, it is difficult to control the thickness of the coating and to obtain a high quality.

The closest in technical essence and the achieved result of the present invention I have is asbestos-cement sheet with a protective and decorative coating, containing asbestos base and the applied polymeric coating of thermosetting powder polymer, applied in a single layer (see Useful model of the Russian Federation No. 45425, application No. 2005100944/22 from 17.01.2005, publ. 10.05.2005).

A significant drawback of this material is its high cost due to high cost of the polymer powder composition and the significant costs associated with the technology of coating.

The aim of the invention is to increase performance and reduce the cost of applying a protective and decorative coating.

This objective is achieved in that the asbestos-cement product with a protective and decorative coating containing asbestos base with front and back surfaces, and inflicted on them a protective and decorative coating according to the invention a protective and decorative coating is performed on the front surface in the form of sequentially deposited adhesive composition and decorative topping crumbles and has a thickness of 0.35 to 3.0 mm, and a maximum particle size of dumping is 0.25-1.0 thickness. The thickness of the layer of adhesive composition is 0.15 to 1.2 mm with a ratio according to the size in the material of the filling of the maximum and minimum particle is not more than 5:1.

In signs, ensuring implementation of the products view, provides that as a dumping used mineral or broken ceramic pieces, as well as glue cement adhesive that can be made on the basis of it is a mixture of cement and quartz sand in a ratio of 30:70-70:30.

Important design solution development is the possibility of applying a decorative piled on svezhesvarennogo asbestos substrate before heat treatment of the product in the steam chamber and enforcement in the base, for example, by rolling.

The implementation of protective and decorative coatings in the form of sequentially printed on the front surface of the adhesive composition and decorative pouring grains with a maximum thickness of 0.35-3.0 mm allows most effectively accomplish its goals. First, in this version, compared to the traditional coated asbestos-cement bases, provided the compatibility of these materials, the front and back surfaces of the product almost equally responsive to external climatic conditions and have very similar physical-mechanical properties, in particular the coefficient of linear expansion and permeability. This eliminates warping, delamination and splitting products. Secondly, the use of cheap bulk materials, for example mineral or ceramic p the threads, applied to cement glue for cold technology allows you to get very cheap products with high aesthetic form, for example, brown.

The features that characterize the particle size ratio of the size of the particles of the filling, the thickness of the layer of the adhesive composition, to produce the optimum structure and decorative characteristics of the coating. The best adhesive properties of the mixture it is quartz sand and cement.

An important reserve for the cost of this product is characteristic, according to which the coating is performed on svezhesvarennom asbestos-cement substrate before heat treatment. In this case, you can either give up, or to minimize the amount of adhesive composition, which simplifies the whole technological cycle of production.

The characteristic entered in the characterizing part of the claims, are new and are not identified by the applicants analogues and the prototype. They are comprehensive and fully serve the main objectives through the implementation in an industrial environment, for example in the production of corrugated slate.

The invention is illustrated by drawings.

Figure 1 (a), b), C) depict embodiments of the asbestos-cement products, respectively, in the form of profiled and flat sheets and fittings.

Asbestotsementnoj the product, depicted in figure 1, is intended primarily as a roofing element and can be made in the form of a smooth flat sheet or corrugated sheet: smooth flat sheet, 1 b), or fittings, in figure 1), for other applications.

Asbestos products can represent any other fitting, such as area, designed to frame the face transitions and corners of the walls, half-rings, grooves and profiles of various forms, etc.

The scope of the proposed asbestos products can also be wall facing element or element of the building structure, where the conditions are much better than the roof.

Asbestos product consists of a base layer 1 made of asbestos cement, and protective and decorative layer 2 on the front surface. The back surface 3 of the coating has not.

In figures 2 and 3 shows the dependence of the average thickness of the coating layer εcfand the mass flow of materials Mr depending on the size of particles dh piled respectively. Presents graphic materials help to design the flow of the original material to perform interesting for the customer and protective and decorative coatings to choose the size of the particles of the filling. They Orient the manufacturer to select the appropriate technology is a logical operation.

The use of the present invention can improve the performance characteristics of the product and reduce the cost of making a protective and decorative coating. The new product meets the criterion of industrial applicability and can be produced on existing facilities for the production of asbestos-cement products, as well as third-party organizations coating on distributed objects, including construction, but this requires special equipment for uniform deposition of the filling.

It is important to note that the present invention provides the solution of important environmental problems associated with the exception leaching or weathering of asbestos fibres and the expansion of export potential manufacturers of asbestos products.

1. Asbestos-cement product with a protective and decorative coating containing asbestos base with front and back surfaces, and inflicted on them a protective and decorative coating, characterized in that with the goal of improving operational performance and reducing the cost of manufacture of protective-decorative coating is performed on the front surface in the form of sequentially deposited adhesive composition and decorative grain filling and has a thickness of 0.35 to 3.0 mm and a maximum coarsely the th particle of the filling is 0.25-1.0 thickness.

2. Asbestos-cement product according to claim 1, characterized in that the material of the filling ratio of the size of the maximum and minimum particle does not exceed 5:1.

3. Asbestos-cement product according to claim 1 or 2, characterized in that the thickness of the layer of adhesive composition is 0,150-1,2 mm

4. Asbestos-cement product according to claim 3, characterized in that the quality of the filling is used mineral grains.

5. Asbestos-cement product according to claim 3, characterized in that as a dumping used crushed ceramic grains.

6. Asbestos-cement product according to claim 3, characterized in that the adhesive composition is used cement glue.

7. Asbestos-cement product according to claim 3, characterized in that the adhesive composition is made on the basis it is a mixture of cement and quartz sand in a ratio of 30:70-70:30.

8. Asbestos-cement product according to any one of claims 4 to 7, characterized in that the decorative filling deposited on svezhesvarennogo asbestos base and forcibly embedded in the base, for example, by rolling.



 

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