Why do imitation stone PC bricks crack?

Imitation stone PC bricks are pressed by high-pressure brick machine vibration. This type of brick meets the requirements of environmentally friendly production. After scientific and systematic maintenance, although this type of brick has strong compressive strength, cracks may also occur during use. Today, the editor will briefly analyze the reasons for cracks in imitation stone PC bricks.
1. The dry sensitivity coefficient is too high. The dryness coefficient is used to measure the tendency of a product to crack. The higher the drying coefficient, the greater the tendency for the product to crack, and vice versa. When the dry sensitivity coefficient is greater than 2, cracks are almost inevitable. When the dry sensitivity coefficient is less than 1, the product is generally less likely to form cracks. This type of crack is common in some clay brick factories and brick factories with high clay content.

2. The plasticity of the raw material for imitation stone PC bricks is poor. Poor plasticity of raw materials can cause difficulties in molding and severe cracking during molding. Even if the billet is barely formed, its crack resistance will be poor due to poor quality and low mechanical strength, making it prone to cracking during drying and baking processes. Imitation stone PC brick manufacturers have found that this situation is similar to some people with poor physical condition, who are prone to illness when the weather is cold, while people with good physical condition have strong resistance to temperature changes, so it is not easy to recover from illness.
3. The particle size distribution of the slurry for imitation stone PC bricks is unreasonable. The so-called particle size distribution refers to the proportion of particles of various sizes in the mud. Generally, the plasticity of the mud is determined by the content of fine powder with three different particle sizes, which should account for 35-50%. The filler particles should account for 20-65%, and the purpose of these particles is to prevent excessive shrinkage, cracking, and deformation of the billet. Coarse aggregate should account for 0-30%, and it is not necessary to use coarse aggregate decorative particles.
The cracks in imitation stone PC bricks are not only related to the quality of the bricks themselves, but also to other external factors. Therefore, when using imitation stone PC bricks, various factors should be considered. In addition, a series of details should be paid attention to during use to minimize human damage. If you have any other questions you would like to know, feel free to call us at any time.