What Are the Key Considerations in GRC Decorative Panel Grinding? An Analysis of Key Technologies and Quality Control Points

In the field of architectural decoration, details determine quality, and the polishing process of GRC decorative panels is the key step in creating premium products. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group knows well that the polishing process not only affects the decorative effect, but also bears on material performance and project safety. This article analyzes the core essentials of the GRC decorative panel polishing process from three dimensions: process standards, technical key points, and quality control.

The Basic Logic of the GRC Decorative Panel Polishing Process: From Material Properties to Process Adaptation

As a composite material, GRC (Glass Fiber Reinforced Concrete) requires a polishing process that takes into account both the brittleness of cement-based materials and the reinforcing properties of glass fibers. Qinglong Group formulates polishing plans for different project requirements as early as the detailed design stage—for example, GRC cladding panels for theater exteriors require fine polishing to achieve flatness tolerances within 0.5mm to meet the overall visual consistency of the curtain wall, while landscape components need to retain a moderate texture, presenting a natural feel through a combined process of coarse and fine grinding. This differentiated processing capability stems from Qinglong's 28 years of technical accumulation in GRC materials.

Key Technical Analysis: Tools, Processes, and Parameter Control

High-quality GRC polishing is built on a scientific process system. The Qinglong production base adopts a "three-stage grinding method": the first stage uses 80-120 grit grinding wheels for coarse grinding to quickly remove surface laitance and mold marks from components; the second stage switches to 240-400 grit sandpaper for semi-fine grinding, focusing on edges, corners, and joints; the third stage uses 600-800 grit fine abrasives combined with water-based polishing agents to enhance surface finish. Notably, the polishing process requires maintaining an ambient temperature of 15-20°C and humidity of 50%-60% to prevent surface cracking caused by uneven material shrinkage—this detailed standard has been incorporated into Qinglong's corporate "GRC Component Production Process Regulations" and has become an important industry reference.

Quality Control Essentials: From Testing to Full Life-Cycle Management

Qinglong Group integrates quality control throughout the polishing process. At the production base in Nanning, Guangxi, every GRC decorative panel must undergo three tests: two-dimensional flatness testing with a laser flatness gauge, with any deviation exceeding 1mm sent back for rework immediately; adhesion testing to ensure the bond strength between the surface coating and the substrate is ≥1.5MPa; and finally, a 300-hour neutral salt spray test to verify weather resistance. This "testing-feedback-optimization" mechanism has enabled Qinglong GRC products, in projects such as the Shenzhen International Convention and Exhibition Center and Century Plaza on Nanjing East Road, to remain crack-free and discoloration-free for ten years after installation.

As a National High-Tech Enterprise and a participant in setting GRC industry standards, Qinglong Group has always believed that refining the polishing process is not merely a technical matter, but also the practice of its mission to "create beautiful architecture." From parametric modeling in the detailed design stage, to the application of intelligent polishing equipment in production, and then to precise alignment in construction and installation, the seamless coordination at every step has together forged the high quality of GRC decorative panels. In the future, Qinglong will continue to integrate the advantages of UHPC/GRC/GRG/GRP materials to provide designers and owners with full-chain solutions from concept to completion, allowing more buildings to showcase the beauty of materials.