RU2097206C1 - Method of decorative treatment of facing slabs of shell rock - Google Patents

Abstract

FIELD: manufacture of building materials. SUBSTANCE: natural stone is cut up, stone pores are cleaned to remove dust, face surface of stone is painted by vibration technique allowing filling natural cavities of stone with composition containing colored cement and filler at 1:2.5 ratio. Surface is then ground and polished. EFFECT: intensified process.

Description

 The invention relates to the production of cladding tiles made of natural stone, in particular from highly porous limestone-shell rock and can be used for exterior and interior cladding of buildings.

 A known method of decorative processing tiles of limestone-shell rock [1] comprising staining the front surface with a liquid dye impregnating micropores of dense stone structures by immersing a precipitate of electroplating baths for chromium plating of ferrous metals.

 The disadvantages of this method are as follows: the density of the front layer does not increase since large pores and voids are not monitored, the color of the products is only brown in a narrow contrast range, transparency, frost resistance and dust-, dirt-repellent properties do not increase, the natural color is completely changed.

 A known method of decorative processing of tiles made of carbonate stone [2] (examples 1-2), including preliminary machining, processing of a paint-soluble surface, drying and coating the front surface with a transparent polymer composition.

 The disadvantages of this method are the use of expensive and scarce materials, for example, epoxy resin, weak decorative effect, toxicity of finished products and a complete change in natural color.

 There is also known a method of decorative processing a split of limestone-shell rock [3] (example 3). A torn stone (breccia) was used, on the irregularities of which a coloring composition based on colored cements was applied in a free-bulk manner. To eliminate gaps, the stone is pre-painted by impregnation with liquid dyes. The front surface is coated with a polymer composition.

 The disadvantages of this method are: a narrow scope, the complexity of the technology, the use of expensive materials, a complete change in natural color, toxicity.

 The technical result of the invention is to reduce the cost of the process, increase the compressive and bending strength of the finished products, increase the dust- and dirt-repellent properties, frost resistance, improve the decorative effect, environmental cleanliness of production and finished products.

 The technical result is achieved by the fact that in the method comprising sawing a block of stone, painting the front surface with a mixture based on colored cement and filler, followed by drying and surface finishing, according to the invention, coloring is carried out by filling the natural voids of the stone with a mixture at a ratio of colored cement and filler 1 2 , 5 during vibration of the mixture, and surface finishing is carried out by grinding and polishing.

 Example. A block of limestone-shell rock is taken, sawn into slabs. Plates are placed on the vibrating table face up. From natural cavities of stone compressed waste blown away from sawing. Then, a filler layer is applied to the front surface, which is a mixture of colored cement with filler, a thickness of 1 1.5 cm, composition 1 2.5. Waste from limestone-shell rock and marble fractions from dust-like structures up to 0.4 mm are used as filler. Ground mica may be added to sparkle. The mobility of the mixture is determined empirically, depending on the size of the voids. After which the mixture is vibrated for 30-60 s. Then the excess mixture is removed and the plates are laid for setting the mortar and natural drying.

 With a short exposure to the grease, large pores and voids are filled, and the coloring composition penetrates the micropores of the dense stone structures by 0.05 0.1 mm, which are removed by subsequent machining. The stone does not completely change its natural color, but only receives a local tint and acquires a dense microporous structure.

 After drying, a textured machining of the front surface is carried out, followed by cutting the plates into measured tiles.

 As a result, we obtain facing tiles of the color of natural stone with a contrasting pattern of color stains and splashes, with polishing, polished or polished structure.

 The advantages of the proposed method, compared with the prototype, lies in the fact that the cost of finished products is reduced through the use of non-deficient and inexpensive materials, significant compressive and bending strength is ensured due to the large depth of monolithic natural voids of the stone.

 In addition, tiles obtained by the proposed method, having a natural color with color stains (white-blue, white-pink, etc.), have a high decorative effect, a wide color gamut, dense structure, satisfactory frost resistance and dust-, dirt-repellent properties .

Claims (1)

 The method of decorative processing of facing tiles from limestone-shell rock, including sawing a block of stone, painting the front surface with a mixture based on color cement and filler, followed by drying and surface finishing, characterized in that the coloring is carried out by filling the natural voids of the stone with a mixture at a ratio of colored cement and filler 1: 2.5 with vibration of the mixture, and surface finish by grinding and polishing.