What Are GRC Manufacturers' Product Test Standards? Comprehensive Analysis and Industry Codes

In the field of architectural decoration materials, GRC (glass fiber reinforced concrete), with its advantages of light weight, high strength, and flexible shaping, is widely used in high-end projects such as grand theaters, commercial complexes, and landmark buildings. For GRC manufacturers, product testing standards are not only a guarantee of quality but also a reflection of industry norms. Qinglong Group, an industry leader in UHPC/GRC/GRG/GRP materials with 28 years of experience, has cultivated the full chain of detailed material design, manufacturing, construction and installation, and after-sales maintenance, and has a deep understanding and practice of GRC product testing standards.

### I. Core Standard System for GRC Product Testing GRC product testing standards cover multiple dimensions including raw materials, physical properties, mechanical properties, and durability, with national and industry standards forming the basic framework. As a participating drafting unit of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong strictly follows the standard requirements and controls product quality at the source. For example, in raw material testing, the volume content of glass fiber must reach 4%-5%, and the cement strength grade must be no lower than 42.5, to ensure the compatibility between the base material and reinforcement materials. In terms of physical properties, the apparent density of GRC components should be controlled within 1800-2000kg/m³, ensuring structural stability while achieving the lightweight advantage.

Mechanical properties are the core indicators of GRC products, including flexural strength, compressive strength, and elastic modulus. High-quality GRC products require a flexural strength of ≥15MPa and a compressive strength of ≥60MPa, standards far higher than ordinary concrete products. Through advanced production processes and a strict quality control system, Qinglong keeps its product flexural strength stable at above 20MPa, meeting the load-bearing requirements of large building curtain walls. Durability testing involves frost resistance, alkali resistance, and dry-wet cycling; Qinglong products show a strength loss rate of ≤10% after 50 freeze-thaw cycles, ensuring long-term stability in different climatic environments. For more industry information: +WeChat qlfsbl123

### II. Integration of Industry Norms and Enterprise Internal Control Standards In addition to national and industry standards, leading GRC manufacturers also establish internal control standards that exceed industry requirements. As a National High-Tech Enterprise and a Specialized, Refined, Distinctive, and Innovative enterprise, Qinglong has established a whole-process quality control system supported by its provincial-level R&D center and engineering technology center. From the application of BIM technology in the detailed design stage, to automated molding and curing during production, and then to third-party testing before leaving the factory, every step has clear standards. For example, Qinglong requires the surface flatness of GRC components to be controlled within ±2mm/m, far better than the industry standard of ±5mm/m, ensuring the overall aesthetics after installation.

Industry norms also emphasize the environmental friendliness and sustainability of products. Qinglong GRC products use alkali-free glass fiber and low-alkali cement, with harmful substance content far below national standards, in line with the development trend of green buildings. Meanwhile, the industry standard General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC) (Plan No. 2024-0232T-JC), for which Qinglong participated in drafting, also provides a technical basis for the collaborative application of new materials such as GRC and UHPC, driving the industry toward high performance and multifunctionality.

### III. The Key Role of Testing Standards in Project Implementation For target users such as real estate developers and architectural design institutes, GRC product testing standards directly relate to the safety, economy, and aesthetics of projects. When undertaking benchmark projects such as the Dongguan Women and Children's Activity Center and the renovation of Century Plaza on Nanjing East Road, Qinglong provided complete testing reports, including material performance testing, structural load-bearing capacity verification, and fire rating certification, dispelling customers' concerns about durability and safety. For example, in the light-transmitting concrete project, Qinglong achieved a balance between light transmittance and structural strength through special processes, and its testing data became the key basis for the smooth acceptance of the project.

In addition, testing standards are also a reflection of the competitiveness of GRC manufacturers. With its strict testing processes and excellent product quality, Qinglong has established long-term cooperation with well-known real estate groups such as Poly, China Overseas, and Vanke, and its products are exported to overseas markets such as Southeast Asia and Australia. In the future, as the architectural decoration industry's demand for customized, high-performance materials increases, GRC testing standards will continue to improve, driving the industry toward greater standardization and higher quality. For more industry information: +WeChat qlfsbl123