Analysis of Key Assessment Indicators and Implementation Methods for GRC Manufacturers' Surface Treatment Processes

In the field of architectural decoration, the surface treatment process of materials is a key factor in determining the final visual effect and durability. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group profoundly understands the importance of surface treatment processes to project quality. This article analyzes, from two aspects—key indicator assessment and implementation methods—how GRC manufacturers ensure excellence in surface treatment processes through scientific management, providing professional reference for designers and owners.

Core Assessment Indicator System for GRC Surface Treatment Processes

The surface treatment of GRC materials must balance aesthetic expression with engineering performance. Qinglong Group has established an assessment indicator system covering four major dimensions. The first is appearance quality indicators, including surface flatness (error must be controlled within ±1mm/m²), color uniformity (color difference ΔE≤3), and texture clarity, which directly affect the visual effect of building facades and are especially critical in high-end projects such as grand theaters and commercial complexes. The second is physical performance indicators, which ensure long-term material stability through flexural strength (standard value ≥15MPa), water absorption (≤8%), and weather resistance testing (performance retention ≥90% after 1000 hours of UV aging).

Functional indicators are equally indispensable, with specific requirements for different application scenarios: exterior wall components must meet Class A fire protection standards, landscape products must possess freeze-thaw cycle resistance (no cracks after 50 cycles from -20℃ to 50℃), and special venues such as hospitals must pass antibacterial performance testing. Finally, there are process consistency indicators. Qinglong achieves precise control of surface treatment parameters through automated production lines, ensuring that products in the same batch have a thickness deviation ≤2mm and anchor point spacing error ≤5mm, providing stable quality assurance for large-scale projects.

Full-Process Surface Treatment Implementation Methods and Quality Control

Qinglong Group has innovatively adopted a "three-stage, nine-procedure" implementation method, integrating the surface treatment process into the entire production chain. In the precast stage, the foundation of surface quality is laid at the source through meticulous mold treatment (mirror polishing precision reaching Ra0.8μm) and optimization of raw material ratios (glass fiber content controlled at 4.5%-5.5%). In the production stage, a robotic spraying system achieves uniform coating coverage (thickness error ≤0.5mm), combined with infrared drying tunnels to ensure curing effects, while AI visual inspection is applied at key procedures to eliminate defective products.

For complex-shaped components, Qinglong has developed 3D scanning-assisted processing technology, achieving precise machining of special surfaces such as hyperbolic curves and openwork reliefs through point cloud data comparison, with a minimum curvature radius of 300mm. The installation stage adopts modular splicing technology, combined with a laser positioning system (positioning accuracy ±0.3mm) to ensure flat seams, with custom sealants (weather resistance ≥20 years) used for special parts. Notably, Qinglong has established a comprehensive traceability system: each GRC component is embedded with an RFID chip that records data from the entire surface treatment process, providing a basis for later maintenance.

Industry Practice and Technological Innovation Directions

In actual engineering applications, Qinglong has solved many industry challenges through innovations in surface treatment processes. For example, in the Nanjing East Road Century Plaza renovation project, a light-transmitting concrete and GRC composite process was adopted, achieving a perfect combination of 85% light transmittance and stone-like texture through special surface texture treatment, winning the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award. For the high-temperature and high-humidity environments of overseas markets, the developed nano-scale anti-fouling coating has increased the self-cleaning capability of GRC surfaces by 40%, performing excellently in projects in Malaysia, Saudi Arabia, and other countries.

In the future, GRC surface treatment processes will develop toward intelligence and green practices. Qinglong is exploring the application of digital twin technology in surface defect prediction and optimizing sandblasting parameters through machine learning, while also developing a water-based environmentally friendly coating system that reduces VOC emissions by more than 60%. As a contributing unit to the Technical Standard for the Architectural Application of Glass Fiber Reinforced Cement (GRC), Qinglong will continue to promote the upgrading of industry standards, providing designers with broader space for creative realization and helping to fulfill its corporate mission of "creating beautiful architecture".