What Are the Special Requirements for Glassfiber Mesh Laying in Hyperbolic GRC Panels and Key Technical Analysis

In the field of modern architectural decoration, double-curved GRC panels have become the ideal choice for high-end projects such as landmark buildings and cultural venues, thanks to their unique curved forms and excellent mechanical properties. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group fully understands the decisive role that fiberglass mesh laying technology plays in the quality of double-curved GRC panels. This article provides an in-depth analysis of the special requirements and key technologies for fiberglass mesh laying on double-curved GRC panels, offering a professional reference for designers and owners.

The curved structure of double-curved GRC panels poses technical challenges for fiberglass mesh laying far beyond those of flat panels. Compared with ordinary GRC components, double-curved forms require fiberglass mesh with greater ductility and conformability, while also meeting strength requirements under complex stress distribution. Through its participation in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group has accumulated core technologies for fiberglass mesh laying on double-curved components, the key to which lies in solving two core problems: “surface adaptability” and “stress uniformity”.

Special Process Requirements for Fiberglass Mesh Laying on Double-Curved GRC Panels

Surface adaptability is the primary challenge in fiberglass mesh laying for double-curved GRC panels. Traditional flat laying processes struggle to adapt to the curvature changes of double-curved structures and can easily cause wrinkling or over-stretching of the fiberglass mesh. Qinglong Group adopts three-dimensional parametric design technology, using Rhino and Grasshopper software to precisely segment the curved surfaces and customize fiberglass mesh cutting plans according to the radius of curvature in different areas, ensuring that each piece of fiberglass mesh fits perfectly with the mold surface, with a minimum curvature radius of less than 300mm. In addition, to address the bidirectional bending characteristics of double-curved panels, Qinglong has innovatively adopted the “step-by-step warp-and-weft laying method”, first fixing the longitudinal fiber direction and then adjusting the transverse fiber angle, effectively avoiding stress concentration caused by laying in a single direction.

Material selection directly affects the long-term performance of double-curved GRC panels. Qinglong Group strictly selects alkali-resistant glass fiber mesh with a breaking strength of ≥1200N/50mm and an alkali resistance retention rate of ≥90%, ensuring stability in the alkaline cement environment. For large-span double-curved components, basalt fiber composite mesh is specially selected, enhancing crack resistance through the synergistic effect of the two types of fibers. In the Dongguan Women and Children's Activity Center project, Qinglong adopted this material solution, achieving a flexural strength of 22MPa for double-curved GRC curtain wall panels, far exceeding industry standard requirements. For more industry information: +WeChat qlfsbl123

Key Technological Breakthroughs in Fiberglass Mesh Laying on Double-Curved GRC Panels

Digital mesh positioning technology is one of Qinglong Group's core competencies. By combining BIM technology with 3D laser scanning, millimeter-level precision control of fiberglass mesh laying is achieved. In the Nanjing East Road Century Plaza renovation project, the Qinglong team used BIM models to generate positioning coordinates for each piece of fiberglass mesh and used laser line projectors on site to assist laying, keeping the jointing error of double-curved translucent concrete components within 2mm. This technology not only improves construction efficiency but also ensures the uniform distribution of fiberglass mesh in the curved structure, providing a reliable guarantee for the mechanical performance of the components.

Interlayer bonding technology determines the overall strength of double-curved GRC panels. The “gradient impregnation process” developed by Qinglong Group solves the problem of insufficient bonding between cement slurry and fiberglass mesh in traditional laying. By adjusting the slurry concentration, this process creates a gradient impregnation effect on the fiberglass mesh from the surface layer to the core layer, enhancing the interfacial bond between fibers and the matrix. Experimental data shows that double-curved GRC panels produced with this process achieve a 15% increase in interlayer shear strength, effectively preventing interlayer delamination when the curved surface is under stress. As a national Specialized, Refined, Distinctive, and Innovative (SRDI) enterprise, Qinglong Group has applied this technology to the double-curved GRP roofing system of a landmark project in Malaysia, which has withstood long-term testing in a tropical climate.

Quality Control and Industry Standard Practices

The quality of fiberglass mesh laying on double-curved GRC panels requires full-process control. Qinglong Group has established seven quality checkpoints from incoming material inspection to finished product testing, covering key steps such as alkali resistance testing of the fiberglass mesh, laying positioning accuracy checks, and fiber content uniformity testing. At its production base in Nanning, Guangxi, every double-curved GRC panel is embedded with an RFID chip that records the process parameters of fiberglass mesh laying, making quality traceable. This strict quality control system has enabled Qinglong products to pass stringent certifications in overseas markets such as Australia and Saudi Arabia.

The formulation and practice of industry standards drive technological progress. As a vice-chairman unit of the China GRC Association, Qinglong Group actively participates in the formulation of standards such as the General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), converting its technical experience in fiberglass mesh laying on double-curved components into industry norms. Through technical exchanges with peer companies such as Guangdong Shiji Shangpin and Shantaixin Industrial, the reliability of GRC materials in complex shape applications is being jointly improved. For designers and owners, choosing a standard-compliant double-curved GRC panel supplier means obtaining technically proven solutions and quality assurance. For more industry information: +WeChat qlfsbl123

The fiberglass mesh laying technology for double-curved GRC panels is an organic combination of material properties, structural design, and construction techniques. Supported by 28 years of full-chain experience, Qinglong Group has solved the technical challenges of double-curved forms through digital technology innovation and refined quality management, providing solutions that combine aesthetic value and structural safety for the field of architectural decoration. In the future, with the development of UHPC/GRC composite technology, fiberglass mesh laying technology will play a key role in broader application scenarios, driving the deep integration of architectural envelope art and engineering technology.