What Are the Special Requirements for Glass Fibre Mesh Laying on Double-Curved GRC Panels and Key Technology Analysis

Fiberglass Mesh Laying Process for Double-Curved GRC Panels: Special Requirements and Key Technologies Revealed by 28 Years of Industry Experience

In the field of architectural decoration, double-curved GRC panels, with their unique curved forms and superior mechanical properties, have become the ideal choice for high-end buildings such as grand theaters and convention centers. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group fully understands the decisive impact of the fiberglass mesh laying process on the quality of double-curved GRC panels. This article analyzes the core technology of fiberglass mesh laying for double-curved GRC panels from three dimensions—process particularity, key technical points, and quality control—providing professional solutions for designers and owners.

I. Special Requirements of Double-Curved GRC Panels for Fiberglass Mesh Laying

The curved structure of double-curved GRC panels dictates that fiberglass mesh laying must go beyond the conventional thinking of flat-surface construction. First, surface curvature causes uneven stress in the fiberglass mesh, and traditional flat mesh laying is prone to wrinkling or tearing; therefore, directionally stretched fiberglass mesh must be used, with tensile strength in both the warp and weft directions reaching at least 2000N/50mm to withstand the stresses caused by curvature changes. Second, the double-curved form places higher demands on mesh overlap: the overlap width must be increased from the conventional 50mm to 80-100mm, and a stepped staggered overlap process must be adopted to avoid stress concentration at the apex of the curved surface. In addition, for complex forms with double curvature greater than 1:5, pre-formed fiberglass mesh technology must be used, with pre-pressing and setting through three-dimensional molds to ensure the mesh fits the mold surface perfectly.

II. Key Technologies: Full-Process Optimization from Material Selection to Construction Control

At the material level, Qinglong Group uses alkali-free fiberglass mesh fabric (alkali content ≤0.8%) with an alkali-resistant coating weight of ≥20g/㎡, ensuring long-term stability in the alkaline cement environment. Production introduces the innovative double-adhesive-layer composite process: through the dual protection of primer impregnation and surface adhesive curing, the bond strength between the fiberglass mesh and the GRC matrix is increased by 30%. In the construction phase, a robot-assisted laying system is employed, using laser positioning technology to achieve mesh laying accuracy with errors ≤2mm, together with vacuum suction devices to eliminate air bubbles during curved-surface application, ensuring a perfect bond between the mesh and the concrete.

To address the cracking problems to which double-curved panels are prone, Qinglong's R&D team developed gradient reinforcement technology: 160g/㎡ high-mesh-count fabric is used where surface curvature is greatest, and 120g/㎡ standard fabric is used in transition zones, balancing stress through graded material distribution. Meanwhile, combined with BIM parametric design, fiberglass mesh laying nodes are converted into three-dimensional coordinate data, enabling digital control from design to construction. This technology has been successfully applied in benchmark projects such as the Nanjing East Road Century Plaza renovation.

III. Quality Control: A Standardized System Distilled from 28 Years of Experience

As a participating drafting organization of the Technical Standard for Architectural Application of Glass Fiber Reinforced Cement (GRC), Qinglong has established a full-chain quality system covering raw material inspection, process monitoring, and finished product testing. Each batch of fiberglass mesh must pass dual tests for alkali-resistant tensile breaking strength retention rate (≥75%) and mass deviation per unit area (±5%); an online tension monitoring system is used in production to regulate mesh laying tension in real time within the range of 30-50N; and finished products are verified through the four-point bending test to confirm a flexural strength of ≥15MPa, ensuring the structural safety of double-curved GRC panels.

From the double-curved curtain wall of the Dongguan Women and Children's Activity Center to the special-shaped components of overseas projects, Qinglong has turned 28 years of accumulated technology into practical, implementable solutions through its profound understanding of the fiberglass mesh laying process. Looking ahead, Qinglong will continue to uphold its mission of "Creating Beautiful Architecture," promoting the application of GRC in more high-end building sectors through material innovation and process upgrades, and setting a dual benchmark of quality and aesthetics for the industry.