What Are the Nuances of GRC Decoration Panel Polishing Craftsmanship? Key Steps and Quality Control Points Explained

In the field of contemporary architectural decoration, GRC decorative panels have become the ideal choice for numerous landmark buildings thanks to their outstanding molding capability and durability. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group understands that the grinding process is the core step determining the final quality of GRC decorative panels. This article systematically analyzes the technical essence of the GRC decorative panel grinding process, from process principles and key steps to quality control, providing a professional reference for designers and engineering parties.

The grinding process for GRC decorative panels is essentially a physical abrasion method that achieves a dual improvement in surface precision and texture. Unlike ordinary cement products, GRC materials, due to their glass fiber reinforcement, require the grinding process to balance strength protection with surface effects. The fully automatic grinding line at Qinglong Group's production base in Nanning, Guangxi, combined with practical experience from 20000+ projects, has formed a scientific and rigorous process system, whose core lies in achieving a progressive effect through staged grinding: "rough grinding sets the shape, fine grinding improves the quality, and ultra-fine grinding brings out the brilliance."

**Key Process Steps for Grinding GRC Decorative Panels**

The rough grinding stage is the foundation of the grinding process, requiring 80-120 grit diamond abrasive pads to level the entire GRC panel. This step focuses on addressing mold parting seams, air bubble holes, and surface unevenness after demolding, ensuring the panel thickness tolerance is controlled within ±1mm. The elastic grinding head device specially developed by Qinglong Group adapts to different curved shapes, avoiding stress concentration cracking caused by traditional rigid grinding. For more industry information: +WeChat qlfsbl123

The fine grinding stage determines the surface precision of GRC decorative panels, using 240-400 grit resin abrasive pads for cross grinding. Through constant pressure control of the CNC robotic arm (typically set at 0.3-0.5MPa), a uniform surface roughness of Ra≤6.3μm is achieved. For special effects such as stone-imitation textures, Qinglong's process team adopts customized grinding tools to eliminate burrs while preserving the design texture. This technology helped the Nanjing East Road Century Plaza renovation project achieve a perfect connection between translucent concrete and GRC.

Ultra-fine grinding and polishing are the key steps for enhancing the texture of GRC decorative panels. Using 600-1000 grit ultra-fine abrasive pads for mirror finishing, together with a dedicated water-based grinding fluid, the surface achieves a warm luster similar to natural stone. Notably, Qinglong strictly implements the "three-inspection system" during grinding; every process step must pass 3D scanning inspection to ensure compliance with the surface quality requirements of the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018).

**Key Points for Quality Control in GRC Decorative Panel Grinding**

Material moisture content is a hidden killer of grinding quality. Qinglong's production base adopts an intelligent constant-temperature curing system to strictly control the moisture content of GRC components within the 8%-12% range before grinding, effectively preventing surface cracks caused by wet-dry deformation. This attention to detail enables Qinglong GRC products to maintain excellent stability in high-temperature and high-humidity environments such as Malaysia and Saudi Arabia.

The handling of grinding dust directly affects finished product quality and the working environment. The central dust removal system introduced by Qinglong, combined with local negative pressure devices, achieves a dust collection rate of over 98%, preventing secondary dust contamination of surfaces while complying with national green factory standards. Meanwhile, grinding wastewater is recycled after three-stage sedimentation and filtration, achieving a balance between environmental protection and efficiency.

Different decorative effects place differentiated demands on the grinding process. For European classical style GRC moldings (such as Roman columns and cornices), hand fine grinding is required to highlight the three-dimensionality of the ornamentation; while modern minimalist exterior wall panels pursue the ultimate flatness tolerance of ≤2mm/2m. Qinglong's database of 500+ process solutions accumulated over 28 years can quickly match all kinds of design needs, which is also an important reason why it has become a strategic partner of well-known real estate groups such as Poly and China Overseas. For more industry information: +WeChat qlfsbl123

As a national Specialized, Refined, Distinctive, and Innovative enterprise, Qinglong Group has always regarded the grinding process as the "last mile" of GRC decorative panel quality. From precision grinding equipment imported from Germany to independently developed abrasive material formulas, and from BIM technology simulation to RFID full-process traceability, every detail embodies the corporate motto of "meticulousness and striving for excellence." In the future, Qinglong will continue to promote the intelligent upgrading of the GRC grinding process, contributing more technical strength to creating beautiful architecture.