In this article we will talk about how to make cement paint with your own hands and what this coating is. In addition, you will learn about which paint compositions are suitable for other structures with similar characteristics.

We paint cement cheaply and efficiently

Is there a universal, durable and at the same time inexpensive paint for cement floors? Yes, there are such coatings and there are many of them, but the most affordable of them is the solution that you will make yourself.

It's no secret that better adhesion To cement floor or plastering walls can be demonstrated by the cement itself. So why not make your own paint based on this material!

Production of coloring composition

Cement paints are compositions based on Portland cement with pigments and integrated fillers - additives responsible for the intensity of hardening, hydrophobicity and strength of the coating.

It is not difficult to prepare a simple composition at home.

We do it this way:

• Pour into plastic container distilled water (if distilled water is not available, you can use rainwater).
• Constantly stirring the water with a paint brush, add cement in small portions.
• After the solution has acquired the consistency of liquid sour cream, add a suitable color ( the best option is a color for mixing into water-based paints).
• Next, mix the solution until it acquires a uniform color.
• If cement paint is made for future use, it is advisable to use a bucket and a drill with a special attachment for mixing. The dosage in this case is 2 kg of Portland cement per 10 liters of water.

Important: When storing paint in finished form more than an hour, cement base is precipitated. Therefore, before use, the composition must be thoroughly mixed again, and as it thickens, small portions of water can be added to the solution. The resource of the solution is small, as a rule, it is 3-4 hours, so you should prepare a composition that you will have time to use during this time.

Painting technology

Painting a cement floor or plaster walls is carried out in two steps:

• Apply the first liquid layer with a wide brush. We try to rub the composition into the surface being treated as much as possible.
• A day after applying the first layer, we again prepare the tinted solution, but a little thicker than the first time. Apply this layer with a velor roller. To compensate for defects in wall plaster, you can apply.

On large surfaces, paint can be applied using a spray gun, which will speed up the pace of work and have a positive effect on the quality of the finished result.

Important: To eliminate the possibility of the paint drying out, it is advisable to wet the surface with water an hour before applying the solution. painting works. In addition, care should be taken to ensure that the drying surface is not exposed to direct sunlight during the day after painting.

By the way, the solution, which you can prepare at home, can be used to coat metal structures, and it protects against corrosion no worse than Zinga electrically conductive paint.

The composition is applied to metal structures after preliminary moistening, which will ensure the necessary adhesion. It is not recommended to paint metal under the hot sun, as the iron will heat up and the applied layer of cement will dry out and crack.

Despite the fact that the price of home-made cement paint is cheap, this composition, if applied correctly, will last about 10 years.

Factory-produced polymer-cement compositions

In the photo - applying polymer cement impregnation to a concrete coating

In addition to self-made coatings, the market offers factory-produced polymer-cement paint that meets the requirements of GOST 19179-73.

The paint composition includes the following components:

• Portland cement;
• ground lime;
• emulsion of synthetic polyvinyl acetate resins;
• pigments;
• sand or ground limestone;
• asbestos dust.

These coatings are characterized by short drying times, elasticity, and resistance to negative impacts factors external environment, high adhesion to the concrete surface.

Factory-made polymer cement paint is produced in a limited range of colors:

• white;
• yellow;
• light yellow;
• terracotta;
• beige-pink;
• light green,
• gray;
• light blue.

These compositions are sold in two-pack packaging. One package contains a pigmented emulsion, and the other a dry mixture of cement with fillers. Directly on site, all components are mixed and dissolved with water in accordance with the manufacturer’s instructions.

The finished paint is used for external treatment of concrete, brick, metal and wooden structures and structures in order to provide aesthetic benefits and increase the durability of treated surfaces.

Important: Polymer-cement compositions are characterized by high resistance to critical temperature values, and therefore can also be used as fire-retardant paints for Polistil metal.

Application of the composition is carried out at a temperature environment not lower than 20 degrees Celsius. Drying time is 2 hours.

Selection of pigments for tinting cement

At industrial production The following types of colors are responsible for the color performance of cement-containing paints:

• titanium dioxide – white;
• red iron oxide - red;
• yellow iron oxide - yellow;
• green chromium oxide - green;
• black iron oxide - black.

By mixing the above pigments, you can get a wide range of color solutions.

Industrially used paint for cement mortar must meet the following requirements:

• be resistant to burnout;
• do not dissolve in water;
• be resistant to alkaline and acidic environments.

Conclusion

Having cement and a certain amount of pigments in stock, you can produce high-quality and reliable paint, the price of which will be an order of magnitude more accessible materials factory production ().

To make the result of work using cement-containing paints more successful, watch the video in this article.

By Decree of the State Committee of the Council of Ministers of the USSR for Construction Affairs dated December 12, 1973 No. 231, the introduction date was established

from 01.01.75

This standard applies to polymer-cement paints, which are a suspension of the dry pigment part consisting of white Portland cement, ground construction lime, light-resistant, alkali-resistant pigments and fillers in an aqueous polymer dispersion - plasticized polyvinyl acetate emulsion or synthetic latexes resistant to cement.

The paints are intended for exterior and interior finishing of buildings on concrete, aerated concrete, brick, asbestos-cement and plastered surfaces and fiberboards, as well as for finishing reinforced concrete panels in factory conditions.

Paints are applied at a temperature not lower than plus 2°C.

1. TECHNICAL REQUIREMENTS

1.1. The dry pigment part of polymer cement paints must contain white Portland cement grade 400 in accordance with GOST 965-78, ground construction lime in accordance with GOST 9179-74, filler - mineral powder in accordance with GOST 9.302-79.

To obtain colored paints, mineral pigments or organic dyes are added that meet the requirements of current standards or technical specifications.

1.2. The dry pigment part of the paints must meet the requirements specified in table. 1.

Table 1

1.3. Polyvinyl acetate emulsion in accordance with GOST 18992-80 or synthetic latexes that are resistant to cement and meet the requirements of standards or technical specifications for these latexes are used as an aqueous dispersion of the polymer.

1.4. The aqueous dispersion of the polymer must be stable and, when mixed with the dry pigment part, resistant to coagulation.

1.5. Paints must be manufactured according to the recipe and technology approved in accordance with the established procedure.

1.6. Ready-to-use paint is obtained on site by mixing the dry pigment part with an aqueous polymer dispersion diluted to 15% concentration.

1.7. Paints are available in white, light yellow, yellow, beige pink, terracotta, light green, light blue and light gray.

By agreement with the consumer, it is possible to produce paints of other colors.

1.8. The paint, ready for use, must meet the requirements specified in table. 2.

table 2

2. ACCEPTANCE RULES

2.1. Polymer cement paints must be accepted by the manufacturer's technical control department in batches.

2.2. A batch is taken to be a quantity of dry pigment part of the same color, complete with an aqueous polymer dispersion, that does not exceed the daily production of the enterprise.

The batch includes a dry pigment part and an aqueous polymer dispersion in a ratio of 1: 0.3 by weight.

The paints are supplied complete in double packaging (separately the dry pigment part and the aqueous polymer dispersion).

2.3. A sample of the dry pigment part in the amount of 1% from each batch is taken using a metal probe from above, from the middle and from the bottom of the bag, each time removing the bottom layer 10-15 cm high from the probe.

The samples taken from the batch are thoroughly mixed, flatted and divided into two equal parts.

One of these parts is subjected to tests according to the indicators provided for in section. 1, the other is stored for one month, in a dry room, in a dry, tightly closed container in case of repeated tests.

2.4. A paint sample in the amount of 1% of each batch is taken using a glass tube, a special sampler or a wooden paddle from the top, middle and bottom of the container. Before taking a sample, the paint is thoroughly mixed and tested according to the indicators provided for in section. 1.

2.5. Checking the quality of the dry pigment part, the stability of the aqueous polymer dispersion and ready-to-use paint of the same color is carried out once per shift.

2.6. If unsatisfactory test results are obtained for at least one of the indicators, a repeat test is carried out for this indicator, for which a double amount of the dry pigment part or paint is selected.

If the results of the re-test do not meet the requirements of the standard, then the entire batch is not subject to acceptance.

3. TEST METHODS

3.1. The manufacturer and consumer carry out quality control checks of the dry pigment part and paint for compliance with the requirements of this standard, using the test methods specified below.

3.2. Determination of moisture content of dry pigment part

3.2.1. Equipment, dishes

Analytical and weight scales. Drying cabinet. Byuks.

3.2.2. Carrying out the test

A sample of the dry pigment part of about 1 g is placed in a pre-dried and weighed bottle and dried at a temperature of 105°C in an oven until constant weight.

Humidity (W) of the dry part as a percentage is calculated using the formula

W= *100,

Where m 1 - weighed portion of the dry pigment part in g;

m 2 - weighed portion of the dry pigment part after drying in

The arithmetic mean of the results of three determinations is taken as the test result.

3.3. Determination of the grinding fineness of the dry pigment part

3.3.1. Equipment, dishes

Sieve No. 020.

Sieve No. 0071.

Technical scales with accuracy up to 0.01 g with weight.

Drying cabinet.

Porcelain cup.

Watch glass.

Drinking water according to GOST 2874-82.

3.3.2. Carrying out the test

A weighed portion of the dry pigment part of about 10 g is stirred in a porcelain cup in 250 ml of water. The residue is ground at the bottom of the cup with light finger pressure to crush the lumps, and at the same time the suspension is decanted several times through a sieve (No. 020 or 0071), previously moistened with water using a soft brush. The water is changed several times, repeating this operation until there are absolutely no traces of dry pigment in the cup.

The residue on the sieve is kept at room temperature for 30 minutes, after which it is dried in an oven at a temperature of 100-105°C.

After drying, the remainder of the dry pigment part is transferred with a soft brush to a watch glass and weighed.

The percentage residue on the sieve (Z) is determined by the formula

Z = *100,

where g 1 - weighed portion of the dry pigment part in g;

g 2 - the remainder of the dry pigment part in g that did not pass through the sieve.

The arithmetic mean of three determinations is taken as the test result.

3.4. Determination of the stability of an aqueous polymer dispersion

The essence of the method is to determine the stability of an aqueous dispersion from coagulation when mixed with a dry pigment part.

3.4.1. Equipment, dishes

Stopwatch according to GOST 5072-79.

Glass plate size 10´ 10 cm.

Glass test tube.

Glass rod.

3.4.2. Carrying out the test

About 10 g of the dry pigment part is weighed on a technical scale and transferred to a porcelain mortar.

Then, 10 g of a diluted (with water) aqueous dispersion of the polymer (polyvinyl acetate emulsion 2.7 times, synthetic cement-resistant latexes 1.7 times by volume) is added to the mortar with constant stirring, after which mixing is continued for 2 minutes.

The test result is considered positive if, when the dry pigment part is mixed with an aqueous polymer dispersion and the sample is transferred to a glass plate, there are no lumps or grains in it.

3.5. Determination of compliance of paint color with the approved standard is carried out according to GOST 16873-78.

3.6. Determination of paint pot life

The essence of the method is to determine the change in paint mobility over a given time

3.6.1. Equipment, utensils, materials

Technical scales with weight.

Stopwatch according to GOST 5072-79.

Mortar and pestle according to GOST 9147-80.

Glass rod.

Beaker according to GOST 1770-74.

Glass plate size 30´ 25cm.

Metal ruler according to GOST 427-75.

Desiccator according to GOST 25336-82.

Distilled water according to GOST 6709-72.

3.6.2. Carrying out the test

The paint composition of painting consistency (21 s according to VZ-4) in an amount of 10 g is obtained by mixing the dry pigment part with an aqueous polymer dispersion. The mixture is ground in a porcelain mortar until the powder is completely wetted, after which stirring is continued for another 5 minutes.

A drop of the resulting paint composition is transferred with a glass rod onto the horizontal surface of a glass plate. Then the plate is placed in a vertical position and secured.

After this, using a metal ruler, measure the length of the drip L.1 cm. The mortar with the paint composition is placed in an uncharged desiccator and stored for 6 hours. After the specified time, a sample is taken from the desiccator, mixed, and the drip length l 1 of the paint composition is measured again. The test result is considered positive if l 1 = l 2.

3.7. Determination of paint hiding power is carried out according to GOST 8784-75; calculation of the hiding power is carried out by t. 15

3.8. Determination of chalking strength

Tests are carried out in accordance with GOST 16976-71 24 hours after applying paint to wet writing paper with the following change: instead of developed and fixed photographic paper, when determining the strength to chalking, black copy paper is used for light tones of paint, red for dark tones.

3.9. Determination of paint viscosity is carried out according to GOST 8420-74.

4. PACKAGING, LABELING, TRANSPORTATION AND STORAGE

4.1. Polymer cement paint is supplied complete in double packaging: a separate dry pigment part and an aqueous polymer dispersion.

4.2. The dry pigment part is packed in paper bags in accordance with GOST 2226-75.

4.3. The aqueous polymer dispersion is packaged in steel barrels in accordance with GOST 5044-79 or flasks in accordance with GOST 5799-78.

4.4. The set of polymer cement paint is accompanied by instructions for the preparation and use of paint and a passport, which states:

name and address of the manufacturer;

product names and colors;

batch weight;

batch number;

date of manufacture;

designation of this standard.

4.5. Paper bags, steel barrels, cans or flasks are marked in accordance with clause 4.4.

Designations are applied to steel barrels using a stencil with permanent paint.

A tag is attached to paper bags, flasks, cans, a stencil is applied or a label is pasted.

Inscriptions on labels and tags must be made with indelible paint.

4.6. The paint kit is stored in dry indoor areas at a temperature not lower than +5°C and not higher than +40°C and a relative humidity of not more than 70%.

5. SUPPLIER WARRANTY

5.1. The supplier shall ensure that polymer cement paints comply with the requirements of this standard.

5.2. If the aqueous polymer dispersion separates but remains homogeneous when stirred, the dispersion is considered acceptable.

5.3. The guaranteed shelf life of the dry pigment part and aqueous polymer dispersion is 6 months from the date of their manufacture.

After the specified storage period, the components of the paint and the paint itself are tested for compliance with the requirements of Section. 1 and if these requirements are met, the paint can be used for its intended purpose.