Do Hyperbolic GRC Panels of Different Thicknesses Differ in Forming Difficulty?

In the field of architectural decoration, double-curved GRC panels have become the preferred material for the facades and artistic forms of numerous landmark buildings thanks to their unique curved aesthetics and structural performance. However, do double-curved GRC panels of different thicknesses differ in forming difficulty? As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide an in-depth analysis of this core issue for designers and owners from the perspectives of material properties, process technology, and engineering practice.

### I. The Intrinsic Link Between Double-Curved GRC Panel Thickness and Forming Difficulty The forming difficulty of double-curved GRC panels is mainly influenced by three major factors: material flowability, structural stability, and mold compatibility, with thickness being the key variable. **Thin double-curved GRC panels (usually those with a thickness ≤15mm)** face two major challenges during forming: first, achieving uniform distribution of glass fibers and the cement matrix is more difficult, and overly thin sections are prone to fiber agglomeration or localized insufficient strength; second, the curved surface has weaker shape retention, making deformation likely due to stress concentration during demolding. Taking a double-curved facade project of a grand theater in which Qinglong participated as an example, the 8mm-thick double-curved decorative panels required a vacuum infusion process combined with custom elastic molds to keep surface accuracy errors within ±2mm.

**Thick double-curved GRC panels (thickness ≥25mm)** present difficulties mainly centered on balancing material self-weight and curing shrinkage. Thicker sections lead to the accumulation of cement hydration heat and are prone to internal cracking; at the same time, increased self-weight places higher demands on the mold support structure. Especially in complex shapes with double curvature and biaxial bending, BIM technology is needed to simulate stress distribution and optimize reinforcement schemes. Among the 600,000 ㎡ annual capacity at Qinglong's Nanning production base, thick double-curved components account for 30%. Relying on the low-shrinkage formula developed by the provincial engineering technology center, Qinglong has successfully raised the forming pass rate of thick panels to over 98%.

### II. Full-Chain Technical Capabilities to Solve the Thickness Challenge As a national high-tech enterprise, Qinglong addresses the forming pain points of double-curved GRC panels of different thicknesses through full-chain innovation covering "design-production-construction". In the **detailed design stage**, Rhino + Grasshopper parametric modeling is adopted, with a focus on optimizing mesh density for thin panels and strengthened mechanical simulation of structural nodes for thick panels; in the **production stage**, thin panels use an automated spray-up forming line to ensure fiber content is precisely controlled at 5%-8%, while thick panels adopt layered casting combined with high-frequency vibration to reduce bubbles and pores.

It is worth noting that thickness is not the only factor determining forming difficulty. The radius of curvature of the surface and the complexity of surface texture are equally critical. For example, the double-curved GRC sunshades Qinglong created for a commercial complex, though only 12mm thick, required 3D scanning technology to achieve a seamless fit between the mold and the components because the minimum curvature radius reached 300mm. This compound difficulty of "thickness + shape" is precisely where Qinglong's technical advantage lies as a participant in developing industry standards (such as the Technical Standard for Architectural Application of Glass Fiber Reinforced Cement (GRC), JGJ/T423-2018).

### III. Thickness Selection Should Balance Aesthetics and Economics For designers and owners, the thickness of double-curved GRC panels should be selected following the principle of "function first, aesthetic fit". Thin panels suit curtain walls or decorative lines that pursue a light, translucent effect, reducing building self-weight and saving costs; thick panels are suitable for irregular components that must bear structural loads, such as large double-curvature canopies and artistic sculptures. Qinglong recommends using full life-cycle cost analysis to prioritize standardized thicknesses (such as conventional 15-20mm double-curved panels) while meeting the design intent, combined with innovative solutions such as UHPC composite layers, to achieve the dual goals of "thinness + high strength". For more industry information: Add WeChat qlfsbl123

From the double-curved GRC curtain wall of the Guangzhou Opera House to the translucent concrete project at Century Plaza on Nanjing East Road, Qinglong has always drawn on 28 years of accumulated technology, solving the forming challenges of double-curved GRC panels of different thicknesses through material formula optimization, process and equipment upgrades, and digital management. In the future, with the development of UHPC/GRC composite technology, the thickness boundaries of double-curved components will be further pushed, creating more possibilities for architectural aesthetics. Choose Qinglong for full-chain assurance from design to delivery, and let every curved form be realized with precision.