How to Fix GRC After Installation: Detailed Fixing Methods and Precautions Explained

GRC installation and fixing is a key step in ensuring the safety and durability of architectural decoration components. As a group with 28 years of experience in the detailed design, manufacturing, and construction of UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze the core methods and industry standards of GRC installation and fixing from a professional perspective. GRC (Glass Fiber Reinforced Concrete), with its lightweight, high-strength, and flexible shaping characteristics, is widely used in grand theaters, commercial complexes, landmark buildings, and other scenarios, and its fixing process directly affects project quality and later maintenance costs.

### I. Design Principles of GRC Component Fixing Systems GRC installation and fixing must follow three major principles: "safe load-bearing, flexible connection, and precise positioning." During the detailed design stage, Qinglong selects embedded, back-bolt, or welding fixing solutions based on component weight (usually ≤20kg/㎡), wind pressure load (must reach 1.5kPa or above in coastal areas), and seismic grade. For example, in the Dongguan Women and Children's Activity Center project, 3D scanning positioning technology was applied to curved GRC exterior wall panels, combined with customized stainless steel connectors, achieving precise installation with an error of ≤2mm. The project won the Silver Award of the AALBORG WHITE Cup GRC Construction Engineering Innovation Award.

### II. Core Methods and Technical Points of GRC Installation and Fixing 1. **Embedded Fixing**: Suitable for factory-prefabricated standardized components, which are connected to the main building structure through galvanized steel parts embedded inside the GRC. Qinglong uses hot-dip galvanized Q235B steel (zinc layer thickness ≥85μm) to ensure corrosion resistance for more than 50 years. During installation, note that the position deviation of embedded parts should be controlled within ±5mm to avoid cracking caused by uneven loading later. For more industry information: +WeChat qlfsbl123

2. **Back-Bolt Fixing**: For large-size GRC exterior wall panels (single panel area up to 6㎡), Qinglong innovatively adopts a screw-in back-bolt system that fixes components to the keel through a mechanical locking principle. This process can withstand a pull-out force of ≥1.2kN and was successfully applied in the Century Plaza translucent concrete project on Nanjing East Road, achieving a seamless connection between GRC and glass curtain walls.

3. **Welding Fixing**: Used for on-site splicing of special-shaped GRC components. Qinglong requires welding points to use E43 series welding electrodes with a weld height of ≥6mm and anti-corrosion treatment. During construction, BIM technology must be used to simulate the welding stress distribution to prevent thermal deformation from affecting installation accuracy.

### III. Precautions and Quality Control of GRC Installation and Fixing 1. **Material Compatibility**: Qinglong strictly complies with the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018) to ensure that the thermal expansion coefficients of GRC components and fixing parts match (the linear expansion coefficient of GRC is approximately 10×10⁻⁶/℃), preventing connection loosening caused by temperature changes.

2. **On-Site Installation Management**: Before installation, the structural base must be leveled (flatness error ≤3mm/2m). Qinglong uses a 3D laser line projector for positioning and conducts horizontal and verticality checks after each component is installed. For high-altitude work above 50m, dedicated lifting equipment and fall-protection systems are provided to ensure construction safety. For more industry information: +WeChat qlfsbl123

3. **Later Maintenance and Monitoring**: Qinglong has established a full life-cycle traceability system that records component installation information through RFID chips and regularly (recommended every 2 years) checks the corrosion of fixing parts and the displacement of connection joints. In a commercial complex project in Saudi Arabia, the GRC decorative lines remained intact after 10 years of use, verifying the reliability of Qinglong's fixing process.

As a national high-tech enterprise and a participant in GRC industry standard-setting, Qinglong always regards the installation and fixing process as a core link of quality control. From detailed design to construction implementation, relying on 28 years of full-chain experience and an annual production capacity of 600,000㎡, Qinglong provides customers with safe and durable GRC system solutions, helping realize the corporate mission of "creating aesthetic architecture."