What Are the Key Considerations in the GRC Decorative Panel Grinding Process? Key Technical Points and Quality Control Analysis

Details Determine Quality: A Guide to the Core Techniques and Quality Control of the GRC Decorative Panel Grinding Process

In the field of architectural decoration, GRC (glass fiber reinforced concrete), with its lightweight, high-strength and flexible shaping characteristics, has become the 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 knows well that the grinding process is a key link in determining the final presentation of GRC decorative panels. This article provides an in-depth analysis of the core essentials of the GRC decorative panel grinding process from two aspects—technical key points and quality control—offering a professional reference for designers and owners.

Technical Key Points of the GRC Decorative Panel Grinding Process: Full-Process Control from Rough Grinding to Fine Finishing

The grinding process of GRC decorative panels goes through three stages—"rough grinding for shaping, medium grinding for leveling, and fine grinding for finishing"—and each step must be executed precisely in line with material properties and design requirements. The rough grinding stage uses 80-120 grit grinding wheels, focusing on treating air bubbles, burrs and mold joint marks on the component surface; care must be taken to avoid over-grinding that exposes glass fibers and compromises structural strength. The medium grinding stage switches to 240-400 grit sandpaper, using the cross-grinding method to eliminate rough grinding marks and keep the surface flatness error within 2mm/m—a standard derived from the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), which Qinglong participated in drafting, providing a clear quality basis for the industry.

The fine grinding stage is the core of enhancing the decorative effect, requiring 600-1000 grit fine sandpaper or polishing pads selected according to design requirements. For special texture needs such as stone-look or metal-look finishes, Qinglong uses customized grinding tools, adjusting grinding angles and force to replicate the texture details of natural materials. For example, in the Nanjing Road East Century Plaza renovation project, the Qinglong team achieved an artistic effect of "flowing light and shadow" on GRC translucent concrete panels through fine grinding; the project won the Silver Award of the First UHPC Construction Engineering Innovation Award (AALBORG WHITE Cup), confirming the key role of the grinding process in aesthetic presentation.

Quality Control System: Full Life-Cycle Management from Raw Materials to Finished Products

The grinding quality of premium GRC decorative panels depends on a strict quality control system. As a national high-tech enterprise, Qinglong has established a three-level quality control process covering raw material inspection, process monitoring and finished product testing. At the raw material stage, cement, glass fibers, admixtures and other materials are strictly screened to ensure the uniformity of the matrix material, reducing grinding defects at the source. During production, 3D scanning technology is used to monitor dimensional deviations of components in real time, combined with automated grinding equipment and manual fine finishing, ensuring both efficiency and detail precision.

In finished product testing, Qinglong conducts 12 indicator tests on ground panels—including surface roughness, gloss and flatness—in accordance with the Glass Fiber Reinforced Cement (GRC) Decorative Products standard (JC/T940-2022). For example, the surface roughness (Ra) of its high-end projects can be controlled below 3.2μm, achieving a mirror-level finish. In addition, Qinglong's original "RFID chip traceability system" records the grinding parameters and quality inspection data of each panel, providing a reliable basis for later maintenance; this technology has been successfully applied in benchmark projects such as the Dongguan Women and Children's Activity Center.

Solutions to Industry Pain Points: Professional Experience Drives Process Optimization

In response to common industry problems such as low grinding efficiency, surface color variation and localized damage, Qinglong has developed systematic solutions based on 28 years of practical experience. For complex double-curved panels, a "zoned grinding method" is adopted, with grinding zones pre-divided through BIM models and flexible abrasives used to reduce stress concentration; for large flat panels, robotic automated grinding systems have been introduced, improving efficiency more than threefold over manual work with more precise error control. In addition, Qinglong's self-developed special repair materials and grinding agents can quickly fix minor defects that appear during grinding, ensuring the integrity of the finish.

As a member of the International GRC Association and vice president unit of the China GRC Association, Qinglong has always driven the industry's technological progress with a meticulous and excellence-pursuing attitude. From in-depth design to after-sales maintenance, Qinglong relies on its full-chain service capabilities to provide customers with integrated support ranging from process consultation to on-site guidance. Whether it is the cost control that real estate developers care about or the artistic effects that designers pursue, Qinglong can achieve dual assurance of "aesthetics" and "quality" by optimizing the grinding process, helping create more architectural masterpieces that stand the test of time.