Recipes and creation of pigment for concrete

Modern building technologies allow to avoid greyness in architecture, adding a pigment for concrete.

Colored concrete is used in the construction of various structures.

In addition to the effect of pigment on the appearance of concrete, the quality characteristics of the material are also improved.

Industrial construction and production is also widely used pigment for painting various products, but also dyeing concrete and artificial stone with their own hands.

Before you start painting, you need to know what the pigment is and what properties it has.

What is a pigment?

Pigment for concrete is an additive with a coloring medium that imparts color. After the concrete has dried, the colorants can not dissolve any liquid.

If the pigment is of good quality, then it is resistant to UV rays and any weather.

By origin pigments are divided into:

• organic: yellow, red, blue, green, brown;
• mineral, subdivided into natural( kaolin, chalk, graphite, lime) and artificial( chromium oxide, carbon black, azure);
• metal: bronze gold, aluminum powder.

To create natural dry dyes destroy natural raw materials, and for artificial pigment - mineral materials undergo heat treatment.

Dyes can be in the form of: powder, emulsion, microcapsules and pastes.

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Pigments have the following properties:

1. Corrosion resistance;
2. Thermal stability;
3. Light fastness. Under the influence of UV, the original color remains;
4. Hiding power. Ability to overlap the initial color of concrete( white or gray);
5. Dispersion. At very fine grinding thin particles possess the raised coloring ability;
6. Chemical resistance. The pigment does not break down from alkali and cement;
7. Oil absorption. The ability of the pigment to retain oil( binder).The lower the indicator, the longer the color.

Painting of concrete is done in two ways: staining the mortar during mixing and painting the finished concrete. Staining of ready-made concrete is similar to the usual painting of walls.

In this case, it is necessary to use deep penetration compounds capable of coloring concrete by 2 mm.

Structures made of colored concrete are more reliable because the material has a long service life and does not require tinting.

To the disadvantage can be attributed high cost, because for a quality color you need a large amount of coloring powder.

Therefore, to reduce the cost of often resorting to the use of a dye prepared by own hands.

Manufacture and use of

dyes The dyes can be of the following types:

• acid;
• acrylic;
• simple;
• are dry;
• color additives.

Sale of any pigments is carried out in many specialized shops, but because of the high price there is a way of preparation of a dye by own hands.

Consider the manufacture of a chlorous dye, for which the following components are required:

1. 7 liters of clean water;
2. 0.5 kg of dry lime paint of the right color;
3. 0.2 liters of calcium chloride;
4. 1.5 liter of lime-pushonki;
5. laundry soap in the calculation of 30 grams per 10 liters of finished paint.

Pus lime and lime paint should be well stirred in water, then add calcium chloride to the mixture. Soap should be grinded on a grater and dissolved in warm water, then add to the solution.

The mixture must be mixed and passed through gauze. Thus, you can get any color: brown, green, red, etc.

Paint prepared by yourself, of course, is very profitable, but the industrial pigment still has a higher quality.

Acid dyes

Acid dyes are the most popular for dyeing concrete. The basis of the dye is iron oxide. Iron oxide pigments are a colorless powder.

Powder when added to the solution enters with a concrete chemical reaction and gives the desired color. There are eight shades: black, red, yellow, green, brown, etc.

To use an acid dye, you will need a solvent, fixing additives, an adhesive. First you need to mix the dry ingredients, and then add the liquid.

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Pigment should be applied to a clean and dry surface with a spray gun or an acid-resistant brush.

Nearby objects should be protected from acid, which destroys fragile objects. The person who produces the stain must be in a special suit and gloves.

After 6 hours, excess paint and acid should be washed off with water, after that, within 24 hours, the treated surface must be carefully dried.

Iron oxide pigments can give concrete the look of a stone or an antique product.

Production uses iron oxide dyes in concrete staining for paving slabs, pavers, artificial stone, roofing tiles.

The iron oxide components give a color that will be eternal, as it does not wash away and does not burn out.

Also iron oxide pigments are used in various oil paints: epoxy, alkyd, etc.

For the preparation of 50 kg of colored concrete, the consumption of dry pigment is 0.5-1 kg, how much to add pigment - depends on the wishes for color: the brighter the color, theMore need to add a pigment, and also depends on the color itself.

For example, if the color is brown, then the amount of dye should be 6% of the amount of cement in the solution.

For mixing colored concrete by one's own hands, it is necessary to observe the following proportions: 1 part of cement, 2.5 parts of sand, ¼ part of water, 4 parts of gravel and 2% of dye. It is recommended to use white cement.

Acrylic dyes

Acrylic dyes are used wherever a durable and bright color is needed. Ideal for walls and floors. There is a wide range of colors.

Acrylic dyes can be used for painting indoor and outdoor concrete. Can be used for artificial stone.

The advantage is that the acrylic paint dries quickly and lasts for a long time, but for this it is very important to choose a dye of good quality.

For the application of pigment, the brush, roller, and sponge are suitable. However, the low-pressure sprayer will allow painting very quickly.

Two layers of pigment can be applied to increase the brightness.

Simple dyes

Simple dyes have a wide range of colors and are the most vivid. If a poor-quality dye is selected, the color will quickly burn out under the influence of sunlight.

Therefore, such pigments are better to use indoors. Presented in the form of a powder, diluted with water and a solvent. Can be used for artificial stone.

Dry dyes

The use of dry pigment provides incredible brightness and is excellent for outdoor use. The color of the artificial pigment is resistant to any weather, light and humidity.

But such a dye can only be used for new concrete that has not undergone any processing. Also, the dry pigment strengthens the concrete structure.

When choosing a dry dye, you need to pay attention to the color of the powder was uniform, there were no lumps.

Dry color pigment does not dissolve in water, but in the solvent after a while settles to the bottom. These include ocher, white, umbra.

Apply the mixture with a dry pigment using a spatula. When staining, the solution must be stirred constantly.

Color additives

Additives are used to create a color material. They are powdered or liquid and are added exclusively to raw concrete during the preparation of the solution.

There are mainly light and pastel shades. Since all the material is stained, the color does not change either under the influence of weather phenomena or under mechanical influence.

The color holds as much as the whole design.

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Color additives can also be used for artificial stone, then the dye is added to the gypsum solution when kneaded.

Modern technology has repeatedly proven that colored concrete can be made by every builder.