Which Production Stages to Focus on When Inspecting a GRC Factory

In the field of architectural decoration materials, GRC (Glass Fiber Reinforced Concrete) has become the preferred material for numerous high-end construction projects thanks to its advantages such as lightweight high strength and flexible shaping. As an industry leader with 28 years of experience in detailed design, manufacturing, construction and installation, and after-sales maintenance of UHPC/GRC/GRG/GRP materials, Qinglong Group knows well that when inspecting a GRC factory, control over the production process directly determines product quality and project outcomes. Below, starting from the core processes, we explain the key areas to focus on when inspecting a GRC factory.

I. Raw Material Selection and Proportioning: The Source Guarantee of GRC Quality

The birth of high-quality GRC products begins with strict raw material control. During the inspection, pay close attention to the factory's procurement standards for core raw materials such as glass fiber, cement, and aggregates—whether it uses high alkali-resistant glass fiber (ensuring long-term durability), low-alkalinity cement (reducing fiber erosion), and well-graded quartz sand aggregates. As a national high-tech enterprise, Qinglong Group has established a comprehensive raw material admission mechanism, using multiple tests to ensure every batch of raw materials meets the requirements of the Technical Standard for Glass Fiber Reinforced Cement (GRC) Building Applications (JGJ/T423-2018), eliminating quality risks at the source. For more industry information: Add WeChat qlfsbl123

II. Mold Design and Fabrication: The Key to Achieving Complex Shapes

One of GRC's major advantages lies in its outstanding shaping capability, and molds are the core vehicle for realizing this advantage. A professional GRC factory should be capable of designing and fabricating molds for complex shapes ranging from traditional European moldings to double-curved surfaces and openwork reliefs, with particular attention to the durability and precision of mold materials (such as GRP and silicone). Relying on its provincial-level R&D center, Qinglong Group has introduced parametric design (Rhino, Grasshopper) and BIM technology, achieving fine shapes with a minimum curvature radius of ≤300mm and a mold reuse rate of over 50 times, ensuring stability in mass production.

III. Mixing and Casting: Core Control of Structural Performance

The uniformity of mixing directly affects the mechanical properties of GRC components. During the inspection, observe whether the factory uses a fully automatic mixing system and how the glass fiber dispersion process works—whether precise metering and low-speed mixing are applied to prevent fiber clumping. Qinglong Group uses its independently developed fiber dispersion technology to ensure glass fibers are evenly distributed in the concrete matrix, giving its products a stable flexural strength of over 20MPa, far exceeding the industry average. For the casting process, attention should be paid to whether the vibration technique is properly applied, to avoid defects such as air bubbles and voids and to ensure component density.

IV. Curing Process: Guarantee for Improved Strength and Durability

Scientific curing is the key to strength development and durability improvement of GRC components. A qualified factory should be equipped with a standard curing room, controlling temperature and humidity (typically 20±2°C temperature and ≥95% humidity) to achieve rapid early strength development. Qinglong Group innovatively adopts a combined "steam curing + natural curing" process, which both shortens the production cycle and ensures stable later-stage strength of components. Testing shows that its products can withstand more than 300 freeze-thaw cycles, meeting usage needs across all climate zones nationwide. For more industry information: Add WeChat qlfsbl123

V. Quality Testing and Delivery: The Final Gate of Full-Process Quality Control

A comprehensive testing system is an important guarantee before products leave the factory. During the inspection, confirm whether the factory has the testing capability for key indicators such as flexural strength, water absorption, and frost resistance, and whether it implements a "test every batch" policy. Qinglong Group has established a strict quality traceability system, recording full-process production data of components via RFID chips, and holds third-party testing agency cooperation qualifications to ensure 100% qualified products upon delivery. In addition, protective measures in packaging and transportation (such as shock resistance and moisture protection) also deserve close attention, to avoid damage to components in transit.

Choosing a GRC manufacturer is essentially choosing full-chain professional capability. Qinglong Group, as Vice Chairman Unit of the China GRC Association and a member of the International GRC Association, is backed by 28 years of whole-industry-chain experience, achieving integrated control from raw materials to finished product delivery, and has provided high-quality GRC products for thousands of major projects at home and abroad. When inspecting a factory, if you can conduct an in-depth evaluation around the processes above, you can accurately identify partners with genuine technical strength and quality control capabilities, safeguarding the aesthetic presentation, safety, and durability of your project.