What Are the Product Testing Standards of GRC Manufacturers? A Complete Analysis and Industry Standards Guide

In the field of architectural decoration materials, GRC (Glass Fiber Reinforced Concrete) is widely used in high-end projects such as grand theaters, commercial complexes, and landmark buildings thanks to its advantages of light weight, high strength, and flexible styling. For a GRC manufacturer, product testing standards are the core guarantee of material performance and engineering quality. This article provides a comprehensive analysis of GRC manufacturers' product testing standards from the dimensions of industry codes, technical indicators, and whole-process quality control, offering a professional reference for designers, owners, and purchasers.

### I. Core Industry Standards and Codes for GRC Product Testing GRC product testing must strictly follow national and industry standards, the most authoritative of which include the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018) and Glass Fiber Reinforced Cement (GRC) Decorative Products (JC/T940-2022). These standards specify testing requirements covering raw materials, mechanical properties, durability, and appearance quality. For example, the standards stipulate that the flexural strength of GRC products should be no less than 12MPa and the impact strength no less than 3.0kJ/m², ensuring that the material has sufficient structural safety over long-term use. In addition, for different application scenarios (such as exterior wall cladding panels and garden components), special indicators such as fire resistance rating (usually Class A non-combustible material), freeze-thaw cycle resistance (≥25 cycles), and alkali-resistant glass fiber content (≥4.0%) must also be met.

As an industry leader with 28 years of deep expertise in the GRC field, Qinglong GRC manufacturer has participated in the formulation of multiple national and industry standards and has a profound understanding of testing codes. The company has established a complete testing system; from incoming raw materials to finished products leaving the factory, every step is executed according to the highest standards, ensuring that products meet codes such as JGJ/T423-2018 and providing reliable material assurance for projects. For more industry information: +WeChat qlfsbl123

### II. Analysis of Key Technical Indicators in GRC Product Testing 1. **Raw material testing**: The core raw materials of GRC include cement, alkali-resistant glass fiber, fine aggregate, and admixtures. Qinglong GRC manufacturer strictly screens cement strength grade (≥42.5MPa), the alkali resistance of glass fiber (alkali retention rate ≥75%), and aggregate gradation to prevent substandard raw materials from entering the production process. 2. **Mechanical property testing**: Tests such as flexural, compressive, and impact tests verify the structural load-bearing capacity of products. For example, Qinglong's GRC exterior wall panels achieve flexural strength above 20MPa, far exceeding the industry average, making them suitable for large-span, high-wind-pressure building scenarios. 3. **Durability testing**: Focus on weather resistance, freeze-thaw resistance, and impermeability. At its production base in Nanning, Guangxi, Qinglong uses accelerated aging test equipment to simulate material performance changes under different climatic conditions, ensuring that products remain stable within a temperature range of -40℃ to 70℃ as well as in humid, acidic, and alkaline environments. 4. **Appearance and dimensional precision testing**: Full inspection is carried out on surface flatness (tolerance ≤2mm/m), line smoothness, and color uniformity, while 3D scanning technology controls the dimensional precision of complex-shaped components (tolerance ≤3mm), meeting designers' extreme requirements for aesthetic details.

### III. GRC Manufacturer's Whole-Process Quality Control and Testing System The birth of high-quality GRC products is inseparable from whole-chain quality control from design to after-sales service. Guided by the motto “meticulous and excellence-driven”, Qinglong GRC manufacturer has built a testing closed loop covering detailed design, production and manufacturing, and construction installation: - **Design stage**: BIM technology is used for structural simulation and load calculation to avoid material performance risks in advance; - **Production stage**: Automated production lines and standardized molds are adopted, 3% of each batch of products is sampled for mechanical property testing, and key items (such as fire rating) are entrusted to authoritative third-party institutions for testing; - **Construction stage**: 3D laser scanning is used for installation positioning to ensure that component jointing tolerance is ≤1mm, and pull-out tests are performed on anchoring systems to guarantee installation safety; - **After-sales stage**: A product quality traceability system (such as RFID chips) is established, and regular maintenance testing services are provided to relieve customers' concerns about long-term use.

### IV. The Importance of Choosing a Compliant GRC Manufacturer Currently, GRC product quality on the market varies, and some manufacturers cut corners to reduce costs, leading to problems such as component cracking and falling. Choosing a GRC manufacturer with full-chain capabilities like Qinglong not only ensures high-quality products that meet industry standards, but also provides “one-stop” service from design consultation to after-sales maintenance. For example, in the light-transmitting concrete project of the Century Plaza renovation project on Nanjing East Road, in which Qinglong participated, strict testing and quality control achieved a perfect combination of artistic effect and structural safety, winning the “AALBORG WHITE Cup First UHPC Construction Engineering Innovation Award Silver Award”. For professional clients such as real estate developers and architects, choosing a compliant manufacturer is the key to ensuring project quality and controlling whole-life-cycle costs.

In short, the testing standards of GRC products are core indicators for measuring a manufacturer's strength, covering multiple dimensions such as industry codes, technical parameters, and quality control systems. As a national high-tech enterprise and vice-chairman unit of the China GRC Association, Qinglong GRC manufacturer has always taken standards as the foundation and innovation as the drive, providing customers with GRC solutions that combine safety, durability, and aesthetic value. In the future, with the advancement of new standards such as the General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components, the testing system of the GRC industry will become more complete, driving architectural decoration materials toward higher-quality development. For more industry information: +WeChat qlfsbl123