RU2237042C1 - Method of manufacturing colored polished coating and colored polished coating on mineral substrate - Google Patents

Abstract

FIELD: manufacture of building materials.

SUBSTANCE: in a method of manufacturing colored polished coating on mineral substrate comprising applying cement-containing composition layer onto mineral substrate, drying applied layer, and polishing it, said application being performed by applying successively (i) base coating; (ii) dry mix containing binder and quartz sand at ratio 1:(1-3) with 3-10% latex and amount of tempering water ensuring subsidence of cone 2-6 cm, said binder being composed of, wt %: Portland cement 30-95, superplasticizer 1-2, methylcellulose 0.05-1, mineral colorant 1-6, mineral additive 0-60, and mineral fibers 0-10; and then (iii) cement for dry topping; (iv) base coating; (v) layer of cement-containing composition with 3-15% latex (on the weight of binder) and tempering water in amount by 30% exceeding its amount providing normal thickness of binding paste. When this composite coating is fully dried, it is subjected to abrasive treatment, after which operations following dry topping are repeated gradually reducing thickness of layer and grain size after abrasive treatment until surface acquires glossy appearance. Thereafter, acryl composition is applied and polishing, when acryl composition is dried, is performed by means of felt material.

EFFECT: increased strength of containing, durability, and wear resistance, and enabled formation of uniform glossy surface with buried concrete pattern.

5 cl

Description

The invention relates to a technology for surface finishing of mineral substrates in the construction and building materials industries with the production of colored polished coatings.

A known method of manufacturing a coating of concrete surfaces, including applying to the concrete surface a polymer-cement composition containing, parts by weight: white Portland cement 1, polyvinyl acetate emulsion 50% 0.3, dibutyl phthalate 0.05, water 0.5, drying it 30- 50 minutes, then onto the surface of the first layer — diluted latex of the composition, parts by weight: divinyl styrene latex 1.0, borax 0.02, water 0.3, and after 10 minutes — a coating layer from a composition similar to the first, and a coating, manufactured in this way (USSR copyright certificate No. 478828, C 04 B 41/70, 1975). The disadvantage of this method is the low strength properties of the resulting coating, which is essentially a kind of paint, has low resistance to weathering, as a result of which the coating is short-lived and is mainly used for internal work.

The closest analogue to the claimed method is a method of manufacturing a colored polished coating on a mineral base, comprising applying to the base a layer of a cement composition containing, wt.%: Portland cement 60-80, alumina cement 20-40, alkali metal carbonate - up to 1.2 cellulose ethers, including methyl cellulose 0.025-0.4, dye to obtain the desired color, and grinding after drying (German patent No. 1943255, 04 B 41/04, 1972).

The closest analogue to the claimed coating is a colored polished coating on a mineral base made by the above method.

A disadvantage of the known methods for producing polished coatings based on concrete mixtures is the lack of strength of the latter and the poor kinetics of the set of strength (mix grade up to 150). In addition, the known compositions lose their properties under the influence of atmospheric influences, since they involve the use of a large number of chemical additives. Another disadvantage is the increased curing time. Further, the process of grinding coatings practically does not differ from grinding of stone, as a result of which its texture appears in the form of open pores on the polished surface of concrete, which worsens the appearance of the surface. These properties are the reason for the insufficient distribution in practice of this and other known methods for producing such coatings.

The aim of the present invention is to provide a high-strength coating, including decorative (color), with high durability and wear resistance, as well as a surface with a hidden concrete texture, i.e. having a glossy uniform surface.

This goal is achieved by the fact that in the method of manufacturing a colored coating polished on a mineral base, including applying a layer of a cement-containing composition to the mineral base and grinding after drying, a primer, a layer of a cement-containing composition composition is applied sequentially, wt.%: Dry mix containing a binder and bleached quartz sand in a ratio of 1: 1-3, latex 3-10% by weight of the dry mixture, mixing water until the cone settles 2-6 cm, the binder having a composition, wt.%: Portland cement 30-95, U-plasticizer С-3 1-2, methyl cellulose 0.05-1, mineral dye 1-6, mineral additive 0-60, mineral fiber 0-10, then cement for ironing, primer, a layer of cement-containing composition composition: the specified binder, latex 3-15% by weight of the binder and mixing water in an amount 30% higher than the normal density of the binder dough, after complete drying is carried out abrasive treatment, then the cycles of operations following ironing are repeated with a decrease in layer thickness and grain size during abrasive treatment with each subsequent m cycles before the acquisition of surface gloss appearance, and then applying an acrylic composition, and grinding is carried out after drying acrylic composition, wherein the grinding is carried out a felt material.

This goal is also achieved by the fact that the colored coating is ground onto a mineral base, made by applying a layer of a cement-containing composition to the mineral base and grinding after drying, made by the above method.

The claimed invention is as follows.

The coating surface may be any solid mineral base with a compressive strength of at least 150 kg / cm ² made of concrete.

The following materials are used:

Portland cement of high grades M400-M900 or, accordingly, Portland cement clinker with gypsum stone,

superplasticizer C-3 (modifier) sodium salt of the condensation product of naphthalenesulfonic acid with formaldehyde, TU 6-36-0204229-625-90;

as methyl cellulose can also be used methyloxypropyl cellulose;

mineral dye - graphite, carbon black, dyes of other colors according to the desired color of the coating;

mineral additives: blast furnace slag, foundry and the like, slag ash, corresponding to GOST 25818-91, tuff - Far Eastern, Caucasian, quartz sand use bleached;

mineral fibers - basalt, fiberglass, both alkali-resistant and ordinary, up to 10 cm long;

aggregate - quartz sand with a fineness module Mkr 1-2;

latex - divinyl styrene, styrene butadiene, polyvinyl chloride, other types;

acrylic composition - based on acrylic and methacrylic acids, i.e. similar to that used in the processing of stone products.

A binder is prepared: components with a moisture content of not more than 3% are dosed with a dosing accuracy of 1%, in wt.%: Portland cement 60, dry modifier (superplasticizer C-3) 1.5 and mineral additive 34, dye 1.5, methylcellulose 0.5 , subjected to joint grinding - mechanochemical activation in a ball mill for 30 minutes to obtain a specific surface of 4500-5000 cm ² / g Mineral fibers 2.5 are added with stirring. The required amount of clinker component (Mk) in the binder is determined depending on the required brand of binder. The resulting binder when stored in air for up to 6 months does not reduce its performance, and can be stored in airtight containers for up to 6 months.

The binder is mixed with aggregate at a moisture content of not more than 3%, in a ratio of 1: 3, mixing is performed in forced-type mixers, for example SB-80, for no more than 5 minutes. The resulting dry mixture can be packed in sealed containers, storage period up to 6 months. The solution mixture is obtained by mixing the dry mixture with latex 5% by weight of the dry mixture and mixing water, w / w + 0.27-0.32, for example 0.3, the cone draft is 2-6 cm.

The second composition is prepared: the binder is mixed with latex 5% by weight of the binder and mixing water based on the water content determined by the HLHT (normal density of the knitting test) + 30%.

The surface of the base is cleaned of all loose particles that reduce its adhesion, a deep penetration primer is applied to concrete surfaces from the primer on concrete, for example Flakk (Greate Brit.), Atlas, either on acrylic or using latex. The first composition is applied to the primed base using conventional plastering - a cement-containing composition from a dry mixture containing a cementitious and fine aggregate - quartz sand, latex and water, for example, 3 mm thick, and the layer thickness and aggregate size vary and take depending on the required texture depth - for MKR 1-2, the texture depth is 1-3 mm, respectively, after grouting it with a grater, the surface is reinforced with cement, then treated with the indicated soil and the second composition is applied - a cement-containing composition, with containing binder, latex and water. The surface of each layer after complete hardening or a set of strength of at least 300 kg / cm ^{2 is} treated with an abrasive tool - carry out abrasive treatment, and with each subsequent cycle, the layer of the applied second composition 2 - from binder, latex and water - is thinner, and the grain of the used abrasive tool finer until a glossy appearance is obtained, then an acrylic composition is additionally applied, after drying of which the surface can be processed by scratching, in which translational movement is performed spatula from top to bottom with the capture of particles of sand, leaving a trace in the form of scratches when moving on the surface.

The resulting coating has the following properties:

- compressive strength - 600-900 kg / cm ² ;

- frost resistance - 400;

- adhesion to the surface of the main structure (when "cracking") - 15-35 kg / cm ² .

Claims (5)

1. A method of manufacturing a colored polished coating on a mineral base, comprising applying a layer of a cement-containing composition to the mineral base and grinding after drying, characterized in that the primer is applied sequentially, a layer of the cement-containing composition, wt.%: A dry mixture containing a binder and quartz sand in a ratio of 1: 1-3, latex 3-10% by weight of the dry mixture, mixing water until the cone settles 2-6 cm, and the binder has a composition, wt.%: Portland cement 30-95, superplasticizer C-3 1- 2, methyl cellulose 0.05-1, mineral dye 1-6, mineral additive 0-60, mineral fiber 0-10, then additionally cement for ironing, primer, layer of cement-containing composition composition: specified binder, latex 3-15% by weight of the binder and mixing water in an amount 30% higher than the normal density of the knitting test, after complete drying, carry out abrasive treatment, then the cycles of operations following ironing are repeated with a decrease in layer thickness and grain size during abrasive treatment with each subsequent cycle until acquired taenia surface gloss appearance, and then applying an acrylic composition, and grinding is carried out after drying of the acrylic composition. 2. The method according to claim 1, characterized in that as the quartz sand use bleached quartz sand. 3. The method according to claim 1, characterized in that the grinding is carried out with felt material. 4. The coating is colored polished on a mineral base, made by applying a layer of cement-containing composition to the mineral base and grinding after drying, characterized in that it is made by the method according to claim 1. 5. The coating according to claim 3, characterized in that the grinding is carried out with felt material.