Special Requirements for Fibreglass Mesh Laying in Double-Curved GRC Panels and Key Technology Analysis

Fiberglass Mesh Laying Technology for Double-Curved GRC Panels: Decoding the Technical Secrets Behind Modern Architectural Aesthetics

In contemporary building envelope design, double-curved GRC panels have become a key material for shaping iconic buildings with their smooth curved forms and outstanding mechanical properties. As an industry leader with 28 years of full-chain UHPC/GRC/GRG/GRP experience, Qinglong Group understands that the fiberglass mesh laying process is the core factor determining the performance of double-curved GRC panels. This article systematically analyzes the special requirements and key technologies of fiberglass mesh laying for double-curved GRC panels, providing designers and project teams with a comprehensive solution from material selection to construction control.

I. Special Performance Requirements for Fiberglass Mesh in Double-Curved GRC Panels

Due to the complex curvature variations of their surfaces, double-curved GRC panels require their internal fiberglass mesh to simultaneously meet three core indicators: strength, flexibility, and adaptability. During its participation in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group found that the fiberglass mesh used for ordinary flat GRC panels is prone to stress concentration in double-curved components. Therefore, double-curved GRC panels must use specially treated alkali-resistant fiberglass mesh with a breaking strength of ≥1800N/50mm and an elastic modulus of over 70GPa, while maintaining stable performance within a temperature range of -40°C to 70°C.

Addressing the tensile characteristics of double-curved structures, Qinglong's technical team innovatively proposed the concept of 'differential warp-and-weft design': high-elastic-modulus yarns are used along the principal stress direction of the curved surface, while high-elongation fibers are selected for the secondary direction, enabling the fiberglass mesh to provide structural support while deforming in coordination with the concrete matrix amid complex curvature changes. This customized solution has been validated in projects such as the Century Plaza renovation project on Nanjing East Road, reducing cracking risk by 30% compared with traditional processes.

II. Key Technologies for Fiberglass Mesh Laying in Three-Dimensional Curved Surface Environments

The fiberglass mesh laying process for double-curved GRC panels breaks through the conventional mindset of flat-surface construction, forming a systematic technology framework encompassing digital layout, pre-forming positioning, and gradient lapping. During the detailed design stage, Qinglong uses the Rhino+Grasshopper parametric platform to decompose the building's curved surfaces into strip units 100-150mm wide, and simulates the optimal direction of the fiberglass mesh through BIM models, ensuring that every fiber is aligned along the principal stress direction.

In the production stage, the original 'vacuum adsorption pre-forming technology' solves the positioning challenge of curved mesh sheets: the fiberglass mesh is first fixed on the mold surface through negative-pressure adsorption, then a robotic arm applies multi-point pre-tensioning so that the mesh sheet perfectly conforms to the curved surface of the mold, with errors controlled within ±2mm. For stress concentration zones at the edges of double-curved panels, a 'gradient lapping process' is adopted—the lapping width is gradually increased from the center of the curved surface toward the edges (from 50mm to 150mm), combined with specialized anchoring clips to achieve wrinkle-free laying. In the Dongguan Women and Children's Activity Center project, this process increased the flexural load-bearing capacity of double-curved GRC panels by 25%.

III. Quality Control and Full Life-Cycle Assurance Strategies

As a national 'Specialized, Refined, Distinctive, and Innovative' enterprise, Qinglong has established a quality control system covering the entire fiberglass mesh laying process. A 'three-inspection system' is implemented upon raw material arrival, and each batch of fiberglass mesh must pass 12 indicator tests, including alkali resistance retention rate (≥90%) and combustible content (≤1.0%). During production, RFID chip traceability technology is used to record the fiberglass mesh laying parameters of each double-curved panel, combined with 3D scanning to digitally verify construction precision.

For different application scenarios, Qinglong provides customized solutions: in regions with large temperature variations, high alkali-resistant fiberglass mesh containing ZrO₂ is recommended, while a hydrophobic treatment process is added for humid environments. Through a database accumulated from over 2,000 project practices, Qinglong can accurately predict the performance degradation of fiberglass mesh in double-curved GRC panels over a 50-year service life, providing owners with full life-cycle technical support from design selection to after-sales maintenance.

From the streamlined curtain wall of the Guangzhou Opera House to the irregular roof of the Suzhou Museum, double-curved GRC panels are reshaping city skylines with their unique aesthetic expressiveness. Qinglong Group will continue its mission of 'creating beautiful architecture,' driving breakthroughs for GRC technology across broader architectural fields through material innovation and process optimization, and building boundless creative space for designers. Choose Qinglong, choose the technical assurance built on 28 years of professional expertise, and let every double-curved vision be precisely realized.