Building materials leverage advanced technologies to optimize the physicochemical properties of raw materials, ensuring they meet the specific performance requirements of various construction scenarios. Whether it’s mineral admixtures used in concrete, inorganic powders in insulation materials, or base materials for decorative panels, all face three critical challenges: First, powder particles tend to agglomerate easily, leading to uneven mixing with the matrix and compromising the strength and stability of the building material; second, inorganic materials often exhibit poor interfacial compatibility with organic binding agents, increasing the risk of delamination, cracking, and other potential defects; and third, these materials frequently lack sufficient functionality, making it difficult to satisfy complex demands such as sound insulation, fire resistance, and waterproofing.

The coating modification machine is achieving precise coating. 、 The integrated process of interface modification creates a uniform and stable modified layer on the surface of raw material particles, fundamentally addressing the issues mentioned above and laying the foundation for the production of high-performance building materials.

In the processing of mineral admixtures such as fly ash, slag powder, and silica fume for concrete applications, the coating and modification machine utilizes hot-air dispersion. And In-situ coating process. First, agglomerated powder particles are dispersed by a high-speed rotating dispersing disc, and then suspended uniformly in the air stream using hot air flow. Subsequently, a modifier—such as silane coupling agent or fatty acid salt—is sprayed in a misty form, enabling its molecules to evenly adsorb onto the surface of the powder particles, thereby forming a dense coating layer.

This process effectively addresses the poor compatibility between mineral admixtures and the cement matrix, reducing the porosity of concrete while enhancing its compressive strength, impermeability, and durability. Taking fly ash as an example, after coating modification, its incorporation level in concrete can be increased from Increased from 30% to over 50%, this approach not only reduces cement usage and lowers carbon emissions but also prevents the potential decline in concrete strength later on.

For powdered insulation materials such as expanded perlite, glass microspheres, and aerogels, a combination of low-speed mixing and atomized spraying is used to evenly coat the powder surfaces with fire retardants and hydrophobic modifiers. Taking the processing of glass microspheres as an example, unmodified glass microspheres tend to absorb water easily and have low strength. However, after being coated and modified, the resulting hydrophobic layer on their surface significantly reduces the water absorption rate, which could otherwise be quite high. Reduced from 25% to below 5%, the introduction of a fire retardant allows the material to meet Class A fire safety standards. Additionally, the modified glass microspheres exhibit significantly improved adhesion to thermal insulation mortar, preventing delamination and substantially extending the service life of the insulation system.

In the processing of decorative panels such as gypsum boards and fiber-cement boards, coating modification machines enhance the bonding strength between the substrate and fibers or adhesives by adding titanium ester coupling agents and eco-friendly lubricants, which form an activated layer on the surface of powder particles. Taking gypsum board production as an example, gypsum powder modified through this process exhibits improved flowability, reducing the risk of hollowing or cracking during molding. Additionally, the modifier can replace conventional organic plasticizers, thereby minimizing the release of harmful substances like formaldehyde and helping gypsum boards meet stringent environmental standards. Furthermore, the modified substrate demonstrates enhanced hardness. 15%-20%, significantly enhancing impact resistance and making it more suitable for complex indoor and outdoor decorative applications.

The coating and modification machine is compatible with various forms of construction raw materials, including powders, microbeads, and fibers. Moreover, the type of modifier can be flexibly switched—such as inorganic, organic, or functional modifiers—enabling both basic interfacial optimization and the addition of specialized properties like fire resistance, water repellency, and antibacterial capabilities. For instance, when processing aerogel powder used for exterior wall insulation, simply by changing the modifier, it’s possible to simultaneously achieve three key functionalities: water repellency, fire resistance, and UV protection—without requiring additional processing steps, thus significantly enhancing the material’s added value.