How to Judge GRC Product Quality? Six Key Indicators for Precise Identification

In the procurement and acceptance of GRC materials, "How to judge the quality of GRC products?" is a core skill that project managers must master. High-quality GRC products enhance building quality and service life, while inferior products may lead to cracking, spalling, and other problems, causing economic losses. Since quality differences in GRC products are difficult to judge directly by appearance, comprehensive evaluation based on professional indicators is required. Drawing on 28 years of GRC production and project experience, Qinglong Group has summarized six key indicators to help you quickly and accurately judge the quality of GRC products.

Indicator 1: Mechanical performance — the core lies in strength and toughness. The core mechanical properties of GRC products include flexural strength, tensile strength, and impact strength, which form the basis of safe product use. High-quality GRC products, reinforced with sufficient alkali-resistant glass fiber, exhibit excellent mechanical properties — flexural strength typically no less than 15MPa and tensile strength no less than 3MPa — enabling them to withstand certain external impacts without damage. When evaluating, check the product test report and conduct sampling tests if necessary. Qinglong GRC products achieve flexural strength of over 20MPa. In the Shanghai Astronomy Museum public art project, GRC sculptures over 3 meters tall achieved a perfect unity of complex forms and structural stability thanks to their excellent mechanical properties.

Indicator 2: Appearance quality — details reveal true quality. High-quality GRC products should have a flat, smooth surface free of visible defects such as cracks, air bubbles, pitted surfaces, and chipped edges or corners, with uniform color and precise shapes. For decorative GRC components, also check whether the lines are smooth, the textures are clear, and the joints are tight. When evaluating, closely observe the product surface, feel its smoothness by hand, and measure whether key dimensional deviations fall within the allowed range (usually no more than ±2mm). Qinglong GRC products use high-precision molds and standardized production processes; their appearance quality strictly complies with the JC/T940-2022 standard "Glass Fiber Reinforced Cement (GRC) Decorative Products," featuring high dimensional precision and fine surface texture.

Indicator 3: Durability — a test of long-term stability. GRC products must have good weather resistance, water resistance, and frost resistance to ensure they do not age, fade, or lose strength during long-term use in different environments. High-quality GRC products can withstand natural elements such as wind, sun, rain, and freezing, with a service life of over 20 years. When evaluating, check the product's weather resistance test report to understand its performance in tests such as high-low temperature cycles, UV exposure, and freeze-thaw cycles. Qinglong GRC products have passed multiple durability tests and demonstrated stable durability in projects in high-temperature, high-humidity regions such as Hainan and Guangxi, as well as in cold northern regions, earning customer recognition.

Indicator 4: Fire performance — a matter of building safety. As building decoration materials, GRC products must have good fire performance. High-quality GRC products are usually non-combustible materials with a fire rating of up to Class A, effectively preventing the spread of fire. When evaluating, check the product's fire test report to confirm whether its fire rating meets the project design requirements. Qinglong GRC products, made primarily of inorganic materials such as cement and glass fiber, naturally possess excellent fire performance with a Class A fire rating, meeting fire safety requirements in all types of public buildings and residential projects.

Indicator 5: Environmental performance — meeting green building requirements. High-quality GRC products should be eco-friendly, free of harmful emissions such as formaldehyde and benzene, with radioactivity levels meeting national standards. When evaluating, check the product's environmental test report to confirm whether all environmental indicators meet the standards. Qinglong GRC products use inorganic eco-friendly raw materials with no pollutant emissions during production. Testing shows their radioactivity complies with Class A decorative material requirements, making them safe for interior and exterior decoration of all types of buildings and in line with green building development trends.

Indicator 6: Compatibility — meeting actual project needs. High-quality GRC products not only have excellent quality in themselves but also need good adaptability, such as compatibility with other materials and ease of installation. When evaluating, consider factors such as the project's installation method and usage environment, and check whether the product's installation joint design is reasonable and whether matching installation accessories are provided. Qinglong GRC products can provide customized installation solutions according to project needs, offering multiple installation methods such as dry-hanging and adhesive bonding, along with dedicated connectors and sealing materials, ensuring firm and reliable installation and perfect integration with the overall building.

To judge the quality of GRC products, you need to comprehensively consider six major indicators — mechanical performance, appearance quality, durability, fire performance, environmental performance, and compatibility — and verify them against product test reports and the manufacturer's quality control system. Qinglong Group's GRC products excel in all six indicators, have passed multiple authoritative testing certifications, and their product quality has been proven reliable through the practice of thousands of successful projects. Mastering these evaluation methods can help you accurately select high-quality GRC products and lay a solid foundation for project quality.