Special Requirements and Key Technology Analysis of the Fiberglass Mesh Laying Process for Double-Curved GRC Panels

In the field of architectural decoration, the craftsmanship details of materials often determine the final presentation and structural safety. As a new building material that combines sculptural beauty with structural performance, the double-curved GRC panel's fiberglass mesh laying process is the core of its technology. As an industry specialist with 28 years of full-chain UHPC/GRC/GRG/GRP experience, Qinglong Group will reveal the technical secrets behind double-curved GRC panels to designers and owners from two aspects: process particularities and key technologies.

Special Requirements for Fiberglass Mesh Laying in Double-Curved GRC Panels: Precision Challenges in Three-Dimensional Space

Compared with flat GRC components, fiberglass mesh laying for double-curved GRC panels faces the dual tests of "three-dimensional curved surface adaptation" and "uniform stress distribution". First, the curvature changes of the double-curved shape require the fiberglass mesh to have a high degree of flexibility and ductility. Ordinary plain-woven fiberglass mesh is prone to wrinkling or tearing when bent, so specially treated alkali-resistant glass fiber mesh must be selected, with tensile strength in both the warp and weft directions reaching 1800N/50mm or above to ensure structural integrity on complex curved surfaces. Second, the load-bearing direction of double-curved components is uncertain, so fiberglass mesh laying must follow the principle of "bidirectional orthogonal laying + local reinforcement". In areas with a curvature radius ≤300mm, 1-2 additional overlapping layers of fiberglass mesh are required to prevent stress concentration from causing later cracking.

In addition, the molding process of double-curved GRC panels places stringent demands on the "spatial positioning accuracy" of fiberglass mesh laying. When laying the mesh inside the mold, three-dimensional laser scanning technology is used to calibrate the position deviation of the fiberglass mesh in real time, ensuring that the positioning error within each square meter does not exceed ±2mm. Meanwhile, the bonding interface between the fiberglass mesh and the substrate requires interface treatment, using a special coupling agent to enhance the bonding strength between the glass fiber and the cement matrix—a detail that directly affects the component's flexural performance. High-quality double-curved GRC panels can achieve a bending strength of over 20MPa, far exceeding the industry average.

Key Technologies for Fiberglass Mesh Laying: From Material Selection to Process Innovation

In the fiberglass mesh laying process for double-curved GRC panels, Qinglong Group has developed a core technology system featuring "customized materials + digitalized processes". On the material side, three specialized fiberglass mesh specifications have been developed for double-curved components of different curvatures: low-curvature components (curvature radius >1000mm) use 200g/㎡ plain-woven alkali-resistant fiberglass mesh, medium-curvature components (300mm ≤ curvature radius ≤ 1000mm) use 250g/㎡ interwoven fiberglass mesh, and high-curvature components (curvature radius <300mm) use 300g/㎡ multi-layer composite fiberglass mesh, achieving precise matching between material performance and shape requirements.

On the process side, BIM technology and automated laying equipment have been introduced. Parametric design generates fiberglass mesh laying path diagrams to guide robotic arms in automatically laying mesh on three-dimensional curved surfaces, increasing laying efficiency by 40% while ensuring that the overlap length of each fiberglass mesh layer is precisely controlled at 100-150mm. For irregular double-curved components, an innovative "pre-formed fiberglass mesh skeleton" process is adopted: the fiberglass mesh skeleton matching the double-curved shape is pre-fabricated outside the mold and then placed into the mold as a whole for pouring, effectively solving the industry challenge of fiberglass mesh failing to conform to complex curved surfaces.

As an enterprise that participated in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group has always regarded craftsmanship details as the core of quality control. The fiberglass mesh laying process for double-curved GRC panels is not only a fusion of materials and technology, but also a practice of the mission to "create beautiful architecture". From the double-curved curtain walls of grand theaters to the irregular overhanging eaves of commercial complexes, Qinglong draws on 28 years of technical expertise to provide reliable structural support for every complex shape, allowing the beauty of architecture to flourish in safety and durability.