What Are the Product Testing Standards of GRC Manufacturers? Core Standards and Testing Procedures

GRC manufacturers' product testing follows national/industry standards, primarily based on the "Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings" (JGJ/T423-2018) and "GRC Decorative Products" (JC/T940-2022). Qinglong strictly performs full-item testing in accordance with these standards to ensure product compliance.

I. Core Testing Standards and Indicators

The two standards specify the testing requirements. JGJ/T423-2018: specifies the mechanical properties, durability, and installation performance of GRC components; mechanical properties require flexural strength ≥12MPa and compressive strength ≥35MPa, and Qinglong products all exceed these standard requirements. JC/T940-2022: regulates the appearance, dimensional deviation, and surface quality of GRC decorative products; appearance must show no obvious defects and dimensional deviation must be ≤2mm/m, while Qinglong products achieve dimensional accuracy of ±0.5mm. Other relevant standards: freeze-thaw resistance follows the "Standard for Test Methods of Frost Resistance of Concrete," and impermeability follows the "Standard for Test Methods of Impermeability of Concrete"; Qinglong's tests all comply with the corresponding standards.

II. Qinglong's Standard Testing Process

Four-step testing ensures products meet standards. Raw material testing: cement, quartz sand, alkali-resistant glass fiber, etc. are tested before entering the plant; Qinglong's raw material pass rate is 100%. Production process testing: key stages such as mold precision, glass fiber mesh laying, and vibration pressure are tested; Qinglong's process testing coverage is 100%. Finished product testing before shipment: full-item testing covering appearance, dimensions, strength, water absorption, etc., with each batch sampled and sent for inspection; Qinglong's factory shipment pass rate is 100%. On-site sampling: random sampling at project sites, compared with factory test results; Qinglong's on-site sampling pass rate is 100%.

III. Testing Reports and Standard Application Recommendations

Standardized testing avoids quality risks. Require manufacturers to provide test reports corresponding to the applicable standards and verify the qualifications of the testing institutions; Qinglong's reports all come from national-level testing institutions. Focus on indicators that match the project environment, such as freeze-thaw resistance testing for northern projects and salt spray resistance testing for coastal projects. Avoid choosing products with incomplete testing items or non-compliant standards. As a participating unit in standard development, Qinglong strictly implements national/industry testing standards and provides projects with high-quality GRC products that meet requirements.