What Should Be Included in the GRC Test Report Provided by the Manufacturer

In the field of architectural decoration materials, GRC (Glass Fiber Reinforced Concrete) is widely used in high-end projects such as theaters, commercial complexes, and landmark buildings, thanks to its advantages of light weight, high strength, and rich design possibilities. As a key link in GRC material procurement and application, the testing report provided by the manufacturer is an important basis for ensuring project quality. Qinglong Group, with 28 years of industry experience, is a leading domestic GRC manufacturer that deeply understands the importance of standardized testing reports for project safety and results. This article provides a detailed analysis of the core content that a GRC testing report should include, offering a professional reference for designers, owners, and procurement parties.

### I. Basic Material Information: The "Identity File" of GRC Products A qualified GRC testing report must first specify the basic information of the product, like the material's "ID card". This includes the product name (e.g., GRC exterior wall panels, GRC decorative lines), model specifications (dimensions, thickness, etc.), production batch, and production date to ensure traceability. In addition, the report must specify the manufacturer information. For GRC manufacturers with full-chain capabilities in detailed design, manufacturing, and construction installation, such as Qinglong Group, their corporate qualifications (such as National High-Tech Enterprise certification) should also be reflected as additional information to enhance the report's authority.

### II. Physical and Mechanical Properties: Core Indicators of GRC Strength and Durability Physical and mechanical properties are key to GRC material quality, directly affecting building safety and service life. The testing report should cover the following core parameters: - **Flexural strength**: As a core performance of GRC, high-quality products should have a flexural strength above 20MPa to ensure that components are not prone to cracking or deformation during installation and use; - **Apparent density**: The lightweight characteristics of GRC are reflected through apparent density, usually controlled at 1.8-2.0g/cm³ to reduce building loads; - **Water absorption and frost resistance**: Especially for projects in cold regions, frost resistance testing (no significant performance decline after 25 freeze-thaw cycles) and water absorption indicators (generally not exceeding 8%) are important bases for ensuring durability. Qinglong Group strictly controls material ratios in production, and the frost resistance indicators of its GRC products have been verified under the harsh environments of overseas projects in Southeast Asia. For more industry information: +WeChat qlfsbl123

### III. Raw Material Quality Certificates: Source Guarantee of GRC Quality GRC is composed of raw materials such as cement, glass fiber, and aggregates, and raw material quality directly determines product performance. The testing report should include quality certificates for the main raw materials, such as the tensile strength and alkali resistance of glass fiber (which should comply with the requirements of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) JGJ/T423-2018), as well as the strength grade and soundness test results of cement. As an enterprise that participated in the formulation of GRC industry standards, Qinglong Group controls raw material quality at the source and has established strict supplier screening and testing mechanisms.

### IV. Craftsmanship and Appearance Quality: Direct Reflection of GRC Decorative Effects In addition to internal performance, the craftsmanship and appearance quality of GRC directly affect the decorative effect of buildings. The testing report should include: - **Surface treatment**: such as flatness (error ≤2mm/m), texture consistency, and color uniformity, to meet designers' requirements for architectural aesthetics; - **Dimensional deviation**: For special-shaped components, the allowable deviation range of key dimensions must be marked to ensure on-site installation accuracy. For example, Qinglong Group achieves precise production of complex shapes through BIM technology and 3D scanning, with dimensional deviations controlled within ±1mm.

### V. Safety and Environmental Performance: Necessary Conditions for Compliance with Building Codes With the popularization of green building concepts, GRC testing reports should also include safety and environmental indicators. Test results such as fire resistance rating (usually Class A non-combustible material), radionuclide limits (complying with the GB 6566 standard), and harmful substance emissions are prerequisites for a project to pass fire protection and environmental acceptance. Qinglong Group's GRC products have not only passed national fire protection testing but are also exported to overseas markets with strict environmental standards, such as Australia and Saudi Arabia, confirming the reliability of their environmental performance. For more industry information: +WeChat qlfsbl123

### VI. Testing Institution and Standard Basis: Endorsement of Report Authority A standardized GRC testing report must specify the qualifications of the testing institution (such as CMA certification) and the standards on which the testing is based, such as JC/T940-2022 Glass Fiber Reinforced Cement (GRC) Decorative Products. As a participant in the formulation of industry standards, Qinglong Group always produces according to enterprise standards higher than national standards, and its testing reports are all issued by authoritative third-party institutions, ensuring that the data is authentic and credible.

In summary, a complete GRC testing report is a comprehensive reflection of material performance, production technology, safety, and environmental protection. For designers and owners, choosing a GRC manufacturer with full-chain service capabilities and attention to testing standards, such as Qinglong Group, not only provides reliable products but also achieves the safe implementation and aesthetic presentation of architectural designs through professional technical support and quality assurance. In the procurement and application of GRC materials, emphasizing the completeness and standardization of testing reports is a key step in ensuring project quality.