What Is the GRC Production Process: In-Depth Analysis of Key Steps

In-Depth Analysis of the GRC Production Process and Its Key Steps

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete), with its lightweight, high-strength, and richly shaped characteristics, has become an ideal choice for high-end projects such as grand theaters, commercial complexes, and landmark buildings. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will comprehensively analyze the core stages of the GRC production process, from material proportioning and mold making to forming and curing, providing professional reference for designers and owners.

Core Steps of the GRC Production Process: Precise Control from Formula to Finished Product

The professionalism of the GRC production process is reflected in its dual control over material performance and manufacturing precision. The first stage is raw material proportioning. High-quality GRC requires high-strength low-alkali cement, alkali-resistant glass fiber (usually alkali-resistant glass fiber mesh or chopped strand), quartz sand, and additives, achieving mechanical properties with flexural strength above 20MPa through precise proportioning. Relying on its provincial-level R&D center, Qinglong Group has established a material database for different application scenarios, allowing mix ratios to be adjusted according to project needs, such as improving freeze-thaw resistance for exterior wall cladding panels and optimizing surface texture for garden components.

Mold making is the key to determining GRC's shaping expressiveness. Traditional European-style moldings mostly use GRP molds, while complex double-curved components require 3D modeling and CNC engraving technology to produce high-precision molds. Qinglong's production base is equipped with large CNC machining equipment, capable of producing molds for special-shaped components with a minimum curvature radius ≤300mm, ensuring the precise reproduction of complex shapes in award-winning projects such as the Dongguan Women and Children's Activity Center. Mold surface treatment directly affects the texture of finished products; through processes such as waxing and film application, various decorative effects such as stone-imitation and metal-imitation can be achieved.

In terms of forming technology, the spray-up method and the premix casting method are the mainstream techniques. The spray-up method uses a high-pressure spray gun to evenly mix glass fiber with the concrete matrix, suitable for large-area panels; the premix casting method achieves material uniformity through mechanical mixing, suitable for small precision components. Qinglong adopts automated spray production lines combined with BIM technology for mold positioning, enabling the Century Plaza light-transmitting concrete project on Nanjing East Road to achieve "zero-error" jointing. Formed components must undergo standard curing, with temperature and humidity control ensuring stable strength; the curing period is usually 7-14 days, and steam curing can be used for special projects to accelerate hardening.

Full-Chain Quality Control: Standardized Management from Laboratory to Construction Site

As a national high-tech enterprise, Qinglong has established a full-process quality system covering detailed design, manufacturing, and construction installation. In the detailed design stage, the technical team uses parametric design software such as Rhino and Grasshopper to transform architects' creative concepts into producible component models and conducts structural force simulations to avoid later cracking risks. During production, every batch of materials must pass laboratory testing, with key indicators such as fiber content and bulk density strictly complying with the requirements of the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018).

Technological innovation in the installation stage is equally important. Qinglong uses 3D laser scanning positioning technology combined with modular installation techniques to keep the installation precision of large GRC curtain walls within ±2mm. For high-altitude installation safety, a dedicated anchoring system has been developed, with its load-bearing capacity verified through pull-out tests, effectively addressing customers' concerns about "falling object hazards at height." In addition, all components are embedded with RFID chips to achieve full lifecycle quality traceability, a technology that has been widely applied in overseas projects in Malaysia, Saudi Arabia, and other countries.

Process Innovation and Industry Trends: Enhancing the Value of GRC in Modern Architecture

With the diversification of architectural design, the GRC production process continues to iterate and upgrade. In recent years, Qinglong has combined UHPC with GRC to develop ultra-high-performance composite panels that retain GRC's shaping advantages while improving compressive strength and durability, suitable for heavy-load scenarios such as bridges and airports. Meanwhile, by introducing light-transmitting concrete technology, GRC has achieved a breakthrough from "decorative component" to "functional component." For example, in the Century Plaza project on Nanjing East Road, light-transmitting GRC panels combined with LED lighting create dynamic nighttime artistic effects.

Compared with traditional stone curtain walls, GRC has significant advantages in lightweighting (weighing only 1/4 of stone), cost-effectiveness, and environmental friendliness. Taking a commercial complex project as an example, using GRC exterior wall cladding panels reduced overall costs by 30% compared with the stone solution, while also reducing transportation energy consumption. As a vice-chairman unit of the China GRC Association, Qinglong is actively promoting the upgrading of industry standards and participating in the formulation of standards such as the General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), leading the industry toward green and precision-oriented development.

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From material R&D to project implementation, every step of the GRC production process embodies the Qinglong spirit of "meticulousness and excellence." Whether it is stone-textured exterior wall cladding panels or artistic components with complex curved surfaces, only by choosing a manufacturer with full-chain service capabilities can the perfect unity of project quality and design effects be ensured. Qinglong Group will continue to be driven by technological innovation, providing more valuable GRC solutions for construction projects worldwide.