What Are the Product Testing Standards of GRC Manufacturers: Comprehensive Analysis and Industry Standards Discussion

In the field of architectural decoration materials, product quality is the cornerstone of project safety and aesthetic presentation. GRC (Glass Fiber Reinforced Concrete), as a key material combining strength with artistic expressiveness, has testing standards that are a focal point of industry attention. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group understands the importance of standards for industry development. This article comprehensively analyzes the product testing standards of GRC manufacturers from three dimensions—technical specifications, performance indicators, and full-process quality control—providing a professional reference for designers and owners.

I. Core Technical Specifications for GRC Product Testing: From Industry Standards to Enterprise Internal Control

The formulation of GRC product testing standards must balance safety and practicality. The current mainstream domestic basis is the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), which clarifies core content such as material composition, performance requirements, and test methods. As an enterprise that participated in drafting this standard, Qinglong GRC manufacturer has established a stricter internal control system on this basis. For example, in glass fiber content testing, it not only meets the industry-mandated ≥4.0% but also controls the error within ±0.5% to ensure stable mechanical properties of the material. In addition, for different application scenarios (such as exterior wall cladding panels and landscape components), Qinglong has established differentiated testing indicators; for instance, exterior wall components must additionally pass a 1000-hour weather resistance test to simulate performance under extreme climate conditions.

II. Analysis of Key Performance Indicators: The Triple Test of Strength, Durability, and Process Precision

Testing of high-quality GRC products must cover three major categories of indicators: physical properties, chemical properties, and process precision. In terms of physical properties, flexural strength is one of the core indicators. The industry standard requires ≥12MPa, while Qinglong GRC manufacturer has raised this indicator to over 20MPa by optimizing fiber ratios and mixing processes, ensuring stronger flexural resistance of components during installation and use. Durability testing includes frost resistance (strength loss rate ≤15% after 25 freeze-thaw cycles) and impermeability (penetration height ≤50mm). The environmental simulation equipment in Qinglong's laboratory can precisely reproduce the climate conditions of different regions, ensuring products meet the needs of the domestic and overseas markets. In terms of process precision, Qinglong uses 3D scanning technology to inspect component dimensions, controlling errors within ±2mm to guarantee the assembly precision of complex shapes, which has been fully verified in projects such as the Nanjing East Road Century Plaza renovation project.

III. Full-Process Quality Control System: Standardized Management from Raw Materials to Installation

Quality control of GRC products is not a single-stage test but spans the entire process of detailed design, manufacturing, and construction installation. At the raw material stage, Qinglong implements strict incoming inspection of cement, glass fiber, admixtures, and more; for example, glass fiber must pass alkali resistance testing to ensure it is not corroded by cement alkalinity during long-term use. During production, automated production lines control mix ratios and molding processes, and samples are drawn every 2 hours for compressive strength testing. During the installation stage, BIM technology is used to rehearse the installation process, and 3D laser positioning is used on site to ensure the safety of the anchoring system. Notably, Qinglong has established a comprehensive quality traceability system: every product carries a unique identifier allowing traceability of the production batch, testing data, and installation information. This practice, together with leading enterprises such as Guangdong Shiji Shangpin and Nanjing Beilida, has jointly advanced the industry's standardization process.

As a national high-tech enterprise and a participant in drafting GRC industry standards, Qinglong Group has always practiced testing standards with an attitude of "meticulousness and striving for excellence." From precision instruments in the laboratory to strict acceptance at project sites, every step demonstrates reverence for quality. For designers and owners, choosing a GRC manufacturer that meets high standards is not only a safeguard for project safety but also a commitment to bringing architectural aesthetics to life. Looking ahead, with the advancement of new standards such as the General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), Qinglong will continue to leverage its technical advantages to provide the industry with higher-quality GRC products and solutions.