What's Involved in the GRC Decorative Panel Grinding Process? Key Techniques and Quality Control Points Explained

In the field of architectural decoration, GRC decorative panels have become the ideal choice for high-end buildings such as grand theaters and commercial complexes, thanks to their lightweight, high-strength properties and rich styling possibilities. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong understands that the grinding process is a key factor determining the final quality of GRC decorative panels. This article provides a comprehensive analysis of the core considerations in the grinding process of GRC decorative panels—from process essentials and technical standards to quality control—offering a professional reference for designers and owners.

The grinding process for GRC decorative panels is not a simple surface treatment, but a systematic engineering effort that runs through the entire production process. Its core objectives are to achieve surface flatness and smoothness, accurately present the designed textures, and ensure a perfect bond between glass fibers and the cement matrix. The automated grinding production line at Qinglong's production base in Nanning, Guangxi, combined with the "three-level grinding standard" summarized from 28 years of construction experience, can meet diverse needs ranging from European classical lines to modern irregular curved surfaces. For more industry information: +WeChat qlfsbl123

Key Technical Points of the GRC Decorative Panel Grinding Process

Base treatment is the foundation of the grinding process and directly affects the final result. Qinglong uses 3D scanning technology to conduct precision inspection of GRC components after demolding, ensuring dimensional deviations are kept within ±2mm. Defects on component surfaces, such as air bubbles and pitted areas, must be filled with special repair mortar; the mix ratio of repair materials strictly follows the JGJ/T423-2018 standard to ensure compatibility with the substrate. Notably, 24 hours of curing is required after repair to prevent secondary defects caused by shrinkage.

The selection of grinding tools and operating techniques directly determines surface quality. The rough grinding stage uses 80-120 grit diamond grinding pads, focusing on removing mold joint marks and protruding edges; medium grinding uses 240-400 grit resin grinding pads to refine surface textures; fine grinding uses 600-800 grit ultra-fine pads to achieve a mirror finish or stone-like texture. The "cross-grinding method" pioneered by Qinglong's craftsmen team effectively prevents texture deviations caused by single-direction grinding and is particularly suitable for complex shaped components such as hyperbolic surfaces.

Core Quality Control Standards for GRC Decorative Panels

Surface flatness is one of the core indicators for GRC decorative panels. In accordance with the JC/T940-2022 standard "Glass Fiber Reinforced Cement (GRC) Decorative Products," Qinglong has established even stricter internal control standards: surface flatness deviation per square meter must not exceed 3mm, and height difference at joints must be ≤1mm. This standard is monitored in real time using a laser flatness detector, ensuring compliance with the stringent requirements of high-end projects such as landmark buildings.

Texture consistency and durability control are equally important. For GRC decorative panels with special textures such as stone and wood imitation, Qinglong uses CNC-carved templates combined with manual touch-up grinding to ensure a texture similarity of over 95% in mass production. At the same time, grinding depth must be strictly controlled during the process to prevent glass fibers from being exposed and compromising component strength—typically, the surface layer of cement paste must be retained at ≥3mm, a parameter precisely controlled using an ultrasonic thickness gauge. For more industry information: +WeChat qlfsbl123

Full-Chain Service Support for Implementing the Grinding Process

As a national high-tech enterprise integrating detailed design, manufacturing, and construction installation, Qinglong incorporates the grinding process into its full-process quality control system. In the design phase, BIM technology simulates the light and shadow effects after component installation to optimize key grinding areas in advance; in production, a "first-article inspection" system is implemented, with senior quality inspectors conducting full inspection of the first component in each batch; installation sites are equipped with portable grinding equipment to address minor damage during transportation, achieving the delivery standard of "finished products upon leaving the factory, perfection upon installation."

From the translucent concrete project at Century Plaza on Nanjing East Road to the special-shaped components of the Dongguan Women and Children's Activity Center, Qinglong has provided high-quality GRC decoration solutions for numerous landmark projects through its exquisite grinding craftsmanship and strict quality control. Going forward, Qinglong will continue to uphold its principle of "meticulous craftsmanship and constant pursuit of excellence," building on 28 years of industry experience to promote the innovative application of GRC materials in the field of architectural decoration and help designers realize more creative visions.