What Is the GRC Production Process: A Complete Analysis from Raw Materials to Finished Products

In the field of architectural decoration materials, GRC (Glass Fiber Reinforced Concrete) has become the preferred material for high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to its lightweight, high-strength, and flexible shaping properties. As a GRC manufacturer with 28 years of industry experience, Qinglong Group will take you into the world of GRC production, analyzing the entire process from raw materials to finished products, and demonstrating how this technology brings vitality to architectural art.

### 1. Scientific Proportioning of GRC Raw Materials: Source Control of Quality

The excellent performance of GRC begins with precise raw material proportioning. In Qinglong's GRC production, high-strength low-alkali cement is selected as the base material, combined with alkali-resistant glass fiber (approximately 4-5% content) as the reinforcing material, supplemented with selected quartz sand, additives, and water to form a unique composite material system. The addition of alkali-resistant glass fiber increases GRC's flexural strength to over 20MPa, while its weight is only 1/4 that of traditional stone, perfectly balancing strength and lightweight requirements. Through 28 years of accumulated experience, Qinglong has established strict raw material screening standards to ensure that every batch of materials complies with the Technical Standard for Glass Fiber Reinforced Cement (GRC) for Building Applications (JGJ/T423-2018), guaranteeing product stability from the source.

### 2. Mold Design and Fabrication: The Core of Customized Shaping

As a custom GRC product manufacturer, Qinglong understands the critical role of molds in achieving desired shapes. Depending on project requirements, mold materials can be wood, GRP, or steel molds: wood molds are suitable for simple lines, GRP molds for curved shapes, and steel molds for high-precision, large-volume production. Taking the translucent concrete project of the Nanjing East Road Century Plaza renovation as an example, Qinglong used 3D scanning technology for reverse modeling, combined with Rhino parametric design, to create special-shaped molds with a minimum curvature radius of ≤300mm, ensuring the precise forming of double-curved components. This stage directly determines whether GRC products can perfectly realize the designer's creative vision, and is the foundation for achieving 'architectural aesthetics'.

### 3. Mixing and Casting: Precise Control of Material Uniformity

During mixing, raw materials must be blended in strict proportions, with specialized equipment ensuring the even dispersion of glass fiber to prevent clumping that would affect strength. Qinglong has introduced a fully automatic mixing system that controls mixing time errors within ±5 seconds, ensuring slurry consistency. For casting, vacuum casting or spray-up processes are used: vacuum casting is suitable for complex components, reducing air bubbles and improving density; the spray-up process uses high-pressure spray guns to evenly apply fiber and slurry onto the mold, improving production efficiency. Whether for the European-style carved components of the Dongguan Women and Children's Activity Center or the hollow-out sunshades of commercial complexes, Qinglong can achieve a high standard of detail precision of ±1mm through process optimization.

### 4. Curing and Demolding: Key Assurance of Stable Performance

Curing is the core stage for GRC strength development. Qinglong adopts a combined approach of 'steam curing + natural curing': in the initial stage, steam curing controls the temperature at 60-80℃ to accelerate cement hydration; in the later stage, natural curing lasts 7-14 days to ensure steady strength growth. After curing, demolding is assisted by a dedicated release agent to avoid surface damage to components. Throughout this process, Qinglong has introduced an RFID chip tracing system that records the curing parameters of each component, achieving full life-cycle quality management, in line with its corporate motto of 'meticulousness and excellence'.

### 5. Quality Inspection and Installation: Seamless Transition from Product to Project

As a GRC manufacturer integrating detailed design, production, and installation, Qinglong has established a three-level quality inspection system: raw material inspection, sampling inspection during production, and full testing of finished products (including flexural strength, water absorption, freeze-thaw resistance, etc.). Qualified products undergo pre-assembly simulation using BIM technology, with on-site positioning by 3D laser scanning to achieve 'zero-error' installation. From domestic Poly and China Overseas Property projects to overseas projects exported to Southeast Asia, Qinglong's full-chain service capabilities ensure the perfect realization of GRC components from factory to building.

From the scientific proportioning of raw materials to the precise control of installation, GRC production technology is a combination of technology and art. As a National High-Tech Enterprise and a participant in GRC standard-setting, Qinglong Group has focused on the innovation and application of UHPC/GRC/GRG/GRP materials for 28 years, using its professional strength to provide designers and owners with solutions for 'creating beautiful architecture'. Whether classical European lines or modern special-shaped curtain walls, the infinite possibilities of GRC are waiting to be unlocked by more architecture dreamers.