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

In the field of contemporary architectural decoration, GRC (Glass Fiber Reinforced Concrete), with its lightweight, high-strength, and flexible molding characteristics, has become an ideal choice for high-end projects such as grand theaters, commercial complexes, and landmark buildings. As a GRC manufacturer with 28 years of industry experience, Qinglong Group will provide an in-depth analysis of the entire GRC production process—from material properties and production techniques to quality control—offering a professional reference for designers and owners.

The Core of the GRC Production Process: Precise Transformation from Raw Materials to Finished Products

The GRC production process is a perfect combination of materials science and engineering technology. Its core lies in compositing glass fibers with cement-based materials through specific techniques to form building components that combine both strength and toughness. As a participant in formulating GRC industry standards, Qinglong strictly complies with the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), breaking down the production process into five key steps to ensure consistent quality in every product.

Step 1: Material Proportioning and Mixing—The Foundational Guarantee of GRC Performance

The birth of high-quality GRC begins with scientific material proportioning. Qinglong uses high-grade sulphoaluminate cement, alkali-resistant glass fibers (content ≥5%), selected quartz sand, and functional additives, achieving precise mixing through an automated mixing system. Among these, the uniform dispersion of glass fibers is critical, directly affecting the product's flexural strength (which can reach over 20MPa). Qinglong's independently developed fiber dispersion technology effectively prevents fiber clumping and ensures stable mechanical properties of the material—a process recognized with the Guangxi Regional Science and Technology Progress Award.

Step 2: Mold Making and Forming—The Key to Achieving Complex Shapes

The appeal of GRC lies in its exceptional plasticity, and molds are the core vehicle for bringing shapes to life. Qinglong has a professional mold workshop, adopting GRP molds, silicone molds, or steel molds according to the needs of different projects. Taking the translucent concrete project at Century Plaza on Nanjing East Road as an example, precise forming of hyperbolic components was achieved through 3D scanning and parametric design, with surface precision errors controlled within ±2mm. For European classical lines (such as Roman columns and cornice lines), modular molds are used, balancing efficiency with detail fidelity.

Step 3: Casting and Curing—The Stage of Shaping Strength and Durability

Formed GRC components must undergo a strict curing process. Qinglong combines steam curing with natural curing, promoting the hydration reaction in a constant temperature and humidity environment to ensure the 28-day compressive strength reaches over 60MPa. For overseas projects (such as Malaysia and Saudi Arabia), based on local climate characteristics, additional sulfate erosion resistance treatment is applied to enhance the material's weather resistance. The refined management of this stage is an important guarantee for Qinglong products being sold around the world.

Step 4: Surface Treatment and Quality Inspection—Dual Control of Aesthetics and Safety

Qinglong focuses on achieving excellence in GRC "both inside and out": surface treatment can simulate textures such as stone and wood grain to meet high-end decoration needs, while RFID chips are embedded inside to enable quality traceability. Each batch of products must pass more than 20 tests, including flexural strength, impact resistance, and fire resistance (Class A1), and large components must also undergo load testing. In the Dongguan Women and Children's Activity Center project, Qinglong's GRC exterior wall panels, tested by a third party, achieved an anchoring system safety factor of over 1.5 times, far exceeding industry standards.

Step 5: Installation and After-Sales Service—The Last Mile of Full-Chain Service

As a GRC manufacturer integrating detailed design, production, and construction, Qinglong provides "one-stop" installation services. Using 3D laser scanning positioning technology, precise assembly of super-large components (with a single-piece area of up to 15㎡) is ensured, with installation errors controlled within 5mm. At the same time, a 24-hour responsive after-sales maintenance system has been established, providing quality tracking for projects for up to 10 years, embodying the brand promise of "meticulous attention to detail and the pursuit of excellence".

From raw material proportioning to after-sales maintenance, every step of the GRC production process tests a manufacturer's professional strength. Supported by 28 years of full-chain experience, Qinglong Group deeply integrates technological innovation with engineering practice, not only providing customers with high-quality GRC products but also, with the mission of "creating beautiful architecture", driving the industry toward refinement and customization. Choosing a professional GRC manufacturer means choosing an architectural solution that combines aesthetic appeal with structural safety.