pigment dye

Before mixing the cement-sand mortar in large volumes, a test mixture is made to determine the right amount of dye for a particular shade. During subsequent mixing, it is necessary to follow the found dosage exactly so that the color is always the same. If the pigment is used in large quantities, cracks may appear in the concrete after drying. The powder will draw some of the water into itself, as a result, the cement does not have enough of it to completely mix. In this case, it is recommended to add water-retaining additives to the solution. When a pigment is added to cement, the color saturation changes until a certain point, when its excess is no longer able to change the shade. The range of this saturation depends on the characteristics of the cement. The required amount of pigment for complete saturation does not exceed 5% of the total mass of cement. If this norm is exceeded, then the strength and frost resistance of concrete will decrease. Therefore, when using dyes, you must follow the instructions of their manufacturer and comply with established standards. Volumes of applied pigment depending on the desired shade (per 100 kg of white cement): Pastel tone - from 1 to 2 kg. Hue of medium intensity - from 3 to 4 kg. The most saturated - from 4 to 6 kg. For dark shades, a smaller amount is taken, and for bright and light shades, a larger amount is taken. The shade also depends on the amount of water added to the solution: the more it is, the lighter the material will be. This is especially noticeable in the production of paving slabs. Building material made by vibrocompression differs significantly from tiles made by vibrocasting. When staining concrete, the color does not change with the aggregate, but with the cement. Therefore, the more cement is added, the richer the tone will turn out. Sale by weight and bags