Pigments for Cement - Concrete Pigment Uses in 2024

Pigments for cement coloring:
I. Organic pigments: good coloring effects and bright colors;
II. Inorganic pigments: mainly composed of oxide colour for cement, simple process;
III. Alkaline pigments: mixed with white cement at appropriate proportions for desired colors;
IV. White Portland cement: it is sintered and ground with gypsum powder to prepare colored Portland cement.

1. Prepare the materials and tools, including cement, sand, aggregate, coloring pigments, water, stirring equipment, molds.
2. First, fully mix the cement, sand and aggregate according to the concrete formula.
3. Add pigments into the mixtures, and ensure the even color. You can mix pigments with a little water to prepare pigment paste. Gradually add the pigment paste into concrete, and stir them to the desired color.
4. Add an appropriate amount of water, to ensure the consistency of concrete paste. Be careful in this process. Do not add too much water. Otherwise, concrete will be in the liquid state.
5. Stir the cement concrete, until the color is even and the mixture has the desired robustness and plasticity.
6. If necessary, transfer concrete into the mold, and conduct curing until it is hardened.
7. Note that the concrete color changes during drying and curing. Therefore, the final color may be slightly different from the color of wet concrete. Make sure that the pigments are compatible with cement concrete in chemical properties, to ensure the color stability and durability.
8. The final proportion and color may vary, depending on project requirements and pigments.

1. Pigments for cement
Pigments are often used to color cement. They are divided into natural pigments and artificial pigments. Natural pigments include loess, lime, graphite, etc. Artificial pigments include iron oxide, chromium oxide, zinc oxide, etc. Fully stir pigments and cement.

2. Dyes for cement
Dyes are finer than pigments. They can penetrate into cement better. Dying is similar to the use of pigments. Pay attention to the concentration and uniformity of dyes.

3. Mineral powder for cement
Mineral powder is a kind of natural pigment. It is made by grinding mineral stones. It can make cement red, yellow, green, etc. Coloring with mineral powder is similar to the use of pigments. Pay attention to the quality and uniformity of mineral powder.

4. Chemical additives for cement
Chemical additives can change the cement color by changing its chemical properties. Common chemical additives include iron oxide, chromium oxide, zinc oxide, etc. Pay attention to the concentration and uniformity of chemical additives in the coloring process.

The above methods are all for coloring. Note that they are suitable for different applications. Choose coloring methods based on specific conditions. Pay attention to the quality and uniformity of cement, to ensure the quality and attractiveness of buildings.

I. Impact of pigment types on the strength of cement products
There are many types of pigments, including inorganic pigments, organic pigments, metal pigments, pearlescent pigments, solar reflective pigments, etc. Inorganic and organic pigments are often used. Inorganic pigments mainly include iron oxide pigments, titanium dioxide, etc. Organic pigments mainly include pigment powder, pigment paste, etc. Seen from the initial reaction, inorganic pigments have little impact on the early and final strength of cement. Organic pigments affect the early strength of cement. Appropriate pigments should be used based on specific conditions.

II. Impact of pigment color on the strength of cement products
Pigment colors affect the strength of cement products. In general, dark pigments will lead to a decline in cement strength, as they contain more macromolecular colorants. These colorants affect the growth of the internal lattice structure of cement, thus affecting the strength of cement. Light-colored pigments should be used to ensure the strength and bright color of cement products.

III. Impact of the amount of pigment on the strength of cement products
The amount of pigment is also a key factor affecting the strength of cement products. Too much pigment will affect the strength of cement, and increase the shrinkage of cement, resulting in cracking of cement products. Pay attention to the amount of pigment. It should not exceed 5% of the total cement under normal circumstances.

Cement pigments are toxic to some extent, depending on the type, dosage and exposure.

Dust of iron oxide and pigments may cause irritation and injury to the lungs and respiratory system. Long-term exposure to it will lead to lung diseases.

Aluminum, iron and other metal ions in cement may cause irritation and injury to the skin and eyes. Long-term exposure may also cause allergic reactions.

Avoid long-term and direct exposure to these substances. Take appropriate protective measures, such as masks, gloves, protective goggles, etc.

In general, be careful to handle these substances in production and use. Abide by relevant standards and environmental requirements, to protect the environment and human health.