Colored cements. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Colored cements. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Mixing to cement mass relevant colorants, you can make various beautiful objects, such as paving slabs and architectural decorations.

Only those that do not change under the action of strong alkalis are suitable as coloring substances. For this reason, Prussian blue, which changes its color in the presence of alkalis, is completely inapplicable. To ensure that the basic gray color of the cement does not affect the tone of colored cements, bright colors are usually chosen.

Below are some colorants that can be used to color cement pastes:

For white or light gray - white marble powder, white soapstone, white asbestos.

For yellow - chrome yellow, yellow ocher.

For red - kolkotar, finely ground red iron ore (iron oxide).

For brown - manganese powder.

For blue - ultramarine, schmalt (cobalt glass).

For purple - mixtures of yellow, red and blue powders, very hot red iron ore.

For green - mixtures of yellow and blue powders.

For black - pure black coal powder. All these paints are used in the form of a fine powder, for which they are first crushed and sometimes even washed out.

The dry paint powder is thoroughly mixed with an appropriate amount of cement and then mixed with water. The finer the paint is ground, and the more thoroughly it is mixed with cement, the greater the amount of cement that can be colored with it.

Good paint mixed with cement and water is poured into molds up to approximately 5 mm high. The mold is then filled with an ordinary cement mixture, which is closely bonded to the colored layer. Such tiles give a colored color on one side and gray on the other.

It should be noted that almost all coloring substances harm the strength of cement, and only ultramarine, added in a small amount, increases its strength.

Author: Korolev V.A.

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