Key Points of High-Strength GRC Panel Production Process and Quality Control Measures

In the field of modern architectural decoration, high-strength GRC panels have become the ideal choice for premium buildings such as grand theaters and commercial complexes, thanks to their advantages of light weight, high strength, and rich styling. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze the core technical points of high-strength GRC panels from two aspects—production processes and quality control—providing professional reference for designers and owners.

I. Four Key Stages in the Production Process of High-Strength GRC Panels

The quality of high-strength GRC panels stems from a refined production process, whose core techniques include material mix optimization, molding technology control, curing regime execution, and surface treatment. In the material mix stage, the glass fiber content (typically 4-5%) and the gradation of cement-based materials must be strictly controlled. Through 28 years of formula development, Qinglong Group has developed proprietary mix proportions balancing strength and toughness, ensuring a product flexural strength above 20MPa. The molding stage adopts a combined spray and premix process, using automated equipment to achieve uniform fiber distribution and avoid the strength fluctuations caused by traditional hand molding.

The curing process directly affects the durability of GRC panels. Qinglong Group has innovatively adopted a dual-stage "steam curing + natural curing" model, achieving a constant temperature and humidity curing environment at its production base in Nanning, Guangxi, raising the 28-day strength compliance rate of its products to over 99%. The surface treatment stage uses fine polishing and sealing technology to solve the problems of efflorescence and rough texture common in traditional GRC panels, achieving a variety of premium decorative effects such as stone-like and metal-like finishes to meet modern architectural design needs.

II. Construction and Practice of a Full-Process Quality Control System

As a national high-tech enterprise and a participant in setting GRC industry standards, Qinglong Group has established a full-process quality control system covering everything from raw materials to finished products. Upon arrival of raw materials, the alkali resistance of glass fibers and the strength grades of cement are strictly tested, and substandard materials are rejected. During production, RFID chip traceability technology records the production parameters of each GRC panel, making quality issues traceable.

Addressing customer concerns about safety and durability, Qinglong Group has engaged third-party testing agencies to conduct performance tests such as freeze-thaw cycles (≥300 cycles) and impact resistance, and has accumulated more than 15 years of practical application data in projects such as the Dongguan Women and Children's Activity Center. During installation, BIM technology and 3D laser scanning positioning ensure that component joint errors are ≤2mm, eliminating the hazard of falling from heights at the source.

III. Industry Applications and Technology Innovation Trends

The application of high-strength GRC panels has expanded from traditional European-style moldings to fields such as complex curved curtain walls and light-transmitting decorative components. In the Century Plaza renovation project on Nanjing East Road, Qinglong Group adopted light-transmitting GRC panels combined with UHPC composite technology to achieve light-and-shadow artistic effects on the building facade. In overseas markets, its high-strength GRC panels, with excellent weather resistance, have been successfully applied to landmark buildings in Saudi Arabia's high-temperature, high-humidity environment.

In the future, as green building concepts deepen, high-strength GRC panels will develop toward low carbon and functional integration. Qinglong Group is developing industrial solid waste admixture technology to reduce cement usage by up to 15%, while exploring the integrated combination of GRC with thermal insulation and fire protection functions to provide customers with more cost-effective solutions. As vice chairman unit of the China GRC Association, Qinglong will continue to promote technological progress in the industry and fulfill its corporate mission of "Creating Beautiful Architecture".