What is the usage ratio of colored cement road brick pigments?

What is the usage ratio of colored cement road brick pigments?What effect does the pigment addition ratio of colored cement road bricks have on the wear resistance of the bricks?I will answer you today

The proportion of pigments used in colored cement road bricks is usually affected by many factors, such as the required color depth, pigment type and concentration, cement dosage, and production process. The following are some common pigment usage ratio ranges:

Iron oxide series pigments: Based on the weight of cement, in general, the addition amount of iron oxide red, iron yellow, iron black and other pigments is usually between 2% and 10%. For example, if you want to mix lighter colored cement road bricks, the addition amount of iron oxide pigment may be 2%-5% of the cement weight; if you need a rich and bright color effect, the addition amount can be increased to 8%-10%, but it is generally not recommended to exceed 10%, otherwise it may affect the physical properties of cement products15.
Other inorganic pigments: such as chrome green, ultramarine, etc., the addition amount is generally about 3%-8% of the cement weight. For some inorganic pigments with strong tinting power, the usage ratio can be relatively low; for pigments with weaker tinting power, the ratio may need to be appropriately increased, but it should also be controlled within a certain range to avoid adverse effects on the performance of road bricks.
Organic pigments: Phthalocyanine series and other organic pigments are usually added in relatively small amounts due to their strong tinting power and bright colors, usually 1%-5% of the weight of cement. Some organic pigments such as azo pigments may be added in amounts between 2%-6% depending on their specific performance and color requirements.

What effect does the pigment addition ratio of colored cement road bricks have on the wear resistance of the bricks?

Low-ratio addition of iron oxide series pigments: When added within an appropriate range (such as 2%-5% of the weight of cement), iron oxide pigments can fill the pores of cement stone and make the structure of road bricks denser. This helps to improve the wear resistance of bricks, because the dense structure can reduce the wear and erosion of brick surfaces by external factors.
High-ratio addition: When the addition ratio is too high (more than 8%), it may affect the hydration reaction of cement, resulting in a less compact structure of cement stone, and too many pigment particles may form weak points inside the brick. This will reduce the wear resistance of road bricks and make surface wear and chipping more likely to occur during use.
Low-ratio addition of organic pigments: Some organic pigments can provide bright colors for road bricks when added in low amounts (such as 1%-3%), but the effect on wear resistance is relatively small. However, due to the characteristics of organic pigments themselves, their effect on improving the wear resistance of road bricks is not as obvious as some inorganic pigments.
High-ratio addition: When the addition ratio of organic pigments is high (more than 5%), the wear resistance of road bricks may be reduced. This is because organic pigments may affect the hydration process and product structure of cement, making the internal structure of bricks loose, and the wear resistance of organic pigments themselves is relatively poor, resulting in a decrease in overall wear resistance.
Other inorganic pigments Ultramarine: Adding an appropriate amount of ultramarine (generally 3%-6%) can give road bricks a unique blue hue without significantly reducing wear resistance. However, if the addition ratio is too high, the wear resistance may be reduced due to changes in the cement stone structure.
Chrome green: Within a reasonable addition ratio (such as 3%-5%), chrome green can improve the wear resistance of road bricks to a certain extent because it can improve the microstructure of bricks to a certain extent. However, when the addition amount is too high, it may also have an adverse effect on the hydration of cement and the structure of bricks, resulting in poor wear resistance.