What Should a Manufacturer's GRC Test Report Contain?

As an industry leader with 28 years of full-chain experience in the UHPC/GRC/GRG/GRP materials field, Qinglong Group deeply understands the critical role that test reports play in building material selection. For decorative materials like GRC (glass fiber reinforced concrete), which are widely used on the facades of grand theaters, commercial complexes, and landmark buildings, a standardized test report is not only proof of product quality, but also an important basis for designers, owners, and contractors to control project risks. This article systematically outlines the core content of GRC test reports, helping industry partners establish scientific quality evaluation standards.

### I. Basic Information and Product Identification: The "Identity File" of a GRC Test Report
A qualified GRC test report must first clarify the product's basic information, including the manufacturer's name (e.g., Qinglong GRC manufacturer), product model and specifications, raw material composition (glass fiber type, cement grade, etc.), production date, and batch number. This section serves as the material's "ID card," ensuring the test subject is traceable. Notably, according to the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), the report must indicate the implemented product standard, such as JC/T940-2022 Glass Fiber Reinforced Cement Decorative Products, which is the primary basis for judging the report's compliance.

### II. Physical and Mechanical Performance Testing: The "Strength Code" of GRC Materials
Physical and mechanical performance is the core indicator of the safety and durability of GRC materials, mainly including flexural strength, compressive strength, elastic modulus, and impact resistance. High-quality GRC products typically achieve flexural strength above 20MPa and compressive strength of no less than 40MPa, which are also the key parameters enabling Qinglong GRC to ensure structural safety in large-scale projects. The test report must detail the test methods (e.g., GB/T15231 standard), specimen dimensions, and testing environment to ensure the scientific validity of the data. In addition, dry density testing is indispensable; the lightweight property of GRC (typically 1800-2100kg/m³, only 1/4 that of natural stone) must be verified through this test to meet lightweight building design requirements.

### III. Durability and Environmental Adaptability: The "Longevity Gene" of GRC Materials
The durability of building materials directly affects the whole-life-cycle cost of a project. GRC test reports must cover durability indicators such as frost resistance, water resistance, carbonation depth, and alkali-resistant glass fiber content. For example, in cold-region projects, frost resistance testing requires no cracking or spalling after 25 freeze-thaw cycles; water resistance testing requires a strength loss rate of no more than 15% after 28 days of immersion. With 28 years of engineering experience, Qinglong GRC has continuously optimized raw material formulations and production processes, and its product weather resistance test data has supported the successful delivery of multiple overseas projects (e.g., Malaysia and Saudi Arabia). For more industry information: + WeChat qlfsbl123

### IV. Appearance Quality and Dimensional Deviation: The "Detail Exam" of GRC Decorative Effects
For designers pursuing architectural aesthetics, the appearance quality and dimensional accuracy of GRC are crucial. The test report must include appearance indicators such as surface flatness, color uniformity, and crack defects, as well as the dimensional deviation ranges for length, width, and thickness. Taking double-curved facade cladding panels as an example, Qinglong GRC achieves dimensional accuracy of ±2mm through BIM technology and 3D scanning control, ensuring "zero-error" jointing during on-site installation. The report must also include high-definition inspection photos to visually demonstrate the product's surface treatment effects, such as stone-imitation textures and openwork relief details.

### V. Hazardous Substance Limits and Environmental Certification: The "Green Passport" of GRC Materials
As environmental requirements become more stringent, GRC test reports must add testing content for hazardous substances such as formaldehyde emissions and radionuclides, ensuring compliance with standards such as GB6566 Limits of Radionuclides in Building Materials. As a national high-tech enterprise and provincial-level R&D center, Qinglong GRC uses low-alkali cement and eco-friendly additives in production, and its products' environmental performance has passed multiple authoritative certifications, providing reliable support for green building projects. In addition, fire rating testing (e.g., GB8624 Class B1 flame-retardant) is also a mandatory indicator for public building projects and must be clearly stated in the report.

### VI. Testing Institution Qualifications and Report Validity: The "Authoritative Endorsement" of GRC Quality
The validity of a test report depends on the qualifications of the testing institution. A formal report must be issued by a third-party institution with CMA (China Metrology Accreditation) qualifications; the first page should bear the CMA seal and the institution's official stamp, and include the signatures of testing and review personnel as well as the report issue date. As a participant in developing industry standards such as GRC Decorative Products and UHPC Exterior Wall Panels, Qinglong Group's product test reports are often used as industry templates, providing customers with highly credible quality proof. For major projects, it is recommended to require the manufacturer to provide a test report issued within the past year to ensure data timeliness.

In actual projects, designers and owners can evaluate the completeness and professionalism of GRC test reports through the six dimensions above. Qinglong GRC has always adhered to the quality policy of "meticulousness and striving for perfection," strictly implementing testing standards throughout the full chain from detailed design to after-sales maintenance, and has provided compliant reports for thousands of projects. Choosing a GRC manufacturer with a complete testing system is not only a guarantee of project quality, but also a long-term investment in building safety and aesthetic value. For more industry information: + WeChat qlfsbl123