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

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete), with its lightweight, high-strength properties and rich shaping capabilities, is widely used for exterior wall cladding panels, decorative lines, and landscape components in high-end projects such as grand theaters, commercial complexes, and landmark buildings. However, the fixing quality after GRC installation directly affects building safety and service life. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze the core methods and key considerations for GRC installation and fixing from a professional perspective, providing systematic solutions for designers, owners, and contractors.

Core Methods for Fixing GRC Components: From Structural Design to Installation Techniques

GRC installation and fixing must take into account component dimensions, weight, and the characteristics of the building substrate, adopting a scientific anchoring system. For lightweight decorative lines (such as cornices and window surrounds), a combined fixing method of 'embedded rebar + expansion bolts' is typically used: galvanized rebar is embedded during GRC component production, and during installation, the rebar is connected to structural beams or shear walls via expansion bolts, ensuring that the pull-out resistance of each anchoring point is no less than 5kN. For large exterior wall cladding panels (each exceeding 2㎡ in area), the 'back-anchor dry-hanging' technique is required, connecting GRC panels to aluminum alloy keels via stainless steel back anchors to form an independent load-bearing system. This technique can effectively absorb building settlement and thermal deformation, preventing component cracking.

During the detailed design stage, Qinglong Group uses BIM technology to simulate installation nodes, customizing fixing schemes for different substrates (such as concrete, steel structures, and masonry walls). For example, in the Century Plaza renovation project on Nanjing East Road, its light-transmitting GRC components adopted 'three-dimensionally adjustable connectors,' achieving millimeter-level installation precision through fine adjustments in the X/Y/Z directions, ensuring perfect joining of complex curved shapes.

Key Considerations for Fixing Installation: Details Determine Safety and Durability

1. Material Selection and Anti-Corrosion Treatment: Rebar and bolts used for anchoring must be hot-dip galvanized or made of stainless steel to prevent fixing failure caused by corrosion. The embedded rebar in GRC components produced by Qinglong has all passed 800-hour salt spray tests, ensuring durability in coastal high-humidity environments. Anti-corrosion gaskets should be installed at the contact surfaces between connectors and GRC to prevent electrochemical corrosion caused by direct contact between metal and cement-based materials.

2. Substrate Treatment Before Installation: The substrate surface must be flat and solid. For concrete substrates, floating slurry should be removed and a bonding agent applied; steel structure substrates need to be derusted and coated with anti-rust paint. Before installation, 3D laser scanning technology should be used to re-verify substrate dimensions; when deviations exceed 10mm, leveling treatment should be performed to avoid uneven stress on components caused by uneven substrates.

3. Load Balance and Load Distribution: The number of anchoring points for a single GRC component must be determined by weight calculation and should be evenly distributed. For super-long components (over 6m), expansion joints must be provided and sliding supports used, allowing slight displacement of components with temperature changes. In the Dongguan Women and Children's Activity Center project, Qinglong optimized anchoring point spacing through finite element analysis, enabling a 20m-long GRC ribbon to bear loads safely.

4. Waterproof Sealing and Later Maintenance: Anchoring nodes must be filled with weather-resistant sealant to prevent rainwater infiltration. After installation, pull-out tests should be conducted with a sampling ratio of no less than 5%, and test values must reach 1.5 times the design load. Qinglong's after-sales maintenance services include regular inspection of anchoring point conditions and reinforcement of loose bolts, ensuring the long-term stability of the GRC system.

As a national high-tech enterprise and a participant in the formulation of GRC industry standards, Qinglong Group has always adhered to the philosophy of 'meticulousness and the pursuit of excellence,' controlling the entire process from detailed design to construction and installation to ensure the fixing quality of every GRC project. Whether it is stone-imitation textured exterior wall cladding panels or complex shaped decorative components, Qinglong, backed by 28 years of technical expertise and full-chain service capabilities, provides customers with safe, reliable GRC solutions that combine aesthetics and durability, helping to realize its mission of 'Creating Beautiful Architecture.'