Do Double-Curved GRC Panels of Different Thicknesses Differ in Forming Difficulty — Analysis of Influencing Factors and Countermeasures

The forming precision of double-curved GRC panels tests not only material performance but also a manufacturer's full-chain technical control capability from design to construction. As Qinglong Group, with 28 years of deep industry experience, we will provide an in-depth analysis of the forming differences of double-curved GRC panels of different thicknesses, covering material properties, process challenges, and solutions.

In the field of architectural decoration, double-curved GRC panels, with their unique curved-surface aesthetics and structural performance, have become a powerful shaping tool for high-end projects such as grand theaters and commercial complexes. However, double-curved GRC panels of different thicknesses face vastly different challenges during the forming process. As a national high-tech enterprise, Qinglong Group, drawing on its experience participating in the formulation of the Technical Standard for Architectural Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018) and combining its practical annual production capacity of 600,000 square meters, has summarized the key influence of thickness on the forming of double-curved GRC panels and systematic response strategies.

I. Core Impact of Thickness Differences on the Forming of Double-Curved GRC Panels

The thickness of double-curved GRC panels directly affects material flowability, structural stability, and curved-surface precision. Thin panels (usually ≤20mm) are prone to springback deformation during forming, making the curvature difficult to control precisely; thick panels (≥30mm) face cracking risks caused by uneven heat dissipation of cement-based materials, and the increased self-weight places higher demands on mold load-bearing and hoisting processes. Take the Nanjing East Road Century Plaza renovation project, in which Qinglong participated, as an example: the 35mm-thick translucent double-curved GRC panels required a specially formulated glass fiber reinforcement system to balance strength and light transmittance, making their forming difficulty 40% higher than that of conventional thicknesses.

II. Analysis of Key Influencing Factors and Industry Pain Points

1. Material mix ratio and fiber distribution: The thickness of double-curved GRC panels determines the number of layers and the orientation of glass fiber placement. Thin panels require highly dispersible chopped fibers to avoid localized strength deficiency caused by fiber agglomeration; thick panels require optimizing the mixing ratio of long and short fibers to ensure material homogeneity. Through 58 patented technologies, Qinglong's R&D center has developed specialized formulations adapted to different thicknesses, achieving flexural strength of over 20MPa.

2. Mold design and demolding process: The precision of molds for double-curved structures directly affects forming quality. Thin panel molds must have higher rigidity to prevent surface collapse; thick panels require segmented demolding structures to avoid stress concentration caused by material shrinkage. Using BIM parametric design and 3D scanning technology, Qinglong controls mold machining precision within ±0.5mm, successfully solving the curved-surface splicing challenges of the double-curved GRC curtain wall in the Dongguan Women and Children's Activity Center project.

3. Curing regime and stress release: Thick double-curved GRC panels are prone to cracking during curing due to temperature differences between the interior and exterior. Qinglong's original "stepped temperature-controlled curing method," through 28 days of constant temperature and humidity curing, controls the cracking rate of thick panels below 0.3%, far below the industry average.

III. Qinglong's Full-Chain Solution: A Technical Closed Loop from Design to Installation

To address the forming challenges of double-curved GRC panels of different thicknesses, Qinglong has built a full-process service system of "detailed design - material R&D - intelligent production - precise installation." In the design phase, Rhino and Grasshopper parametric platforms are used to optimize surface curvature, ensuring mechanical balance between thickness and form; in production, automated material distribution equipment and robotic laying technology increase fiber distribution uniformity by 30%; during installation, 3D laser positioning and modular splicing keep on-site errors within 2mm. This integrated "design-production-construction" model has been validated in overseas projects such as the podium of Malaysia's Twin Towers and the Cultural Center in Saudi Arabia.

As a vice-chairman unit of the China GRC Association, Qinglong has always upheld the mission of "creating beautiful architecture," transforming 28 years of industry experience into technical advantages for solving complex shaping challenges. Whether thin double-curved GRC decorative panels or thick structural load-bearing panels, we can provide expert-level services from material selection to after-sales maintenance, helping designers bring their creative visions to life and delivering architectural works for owners that combine aesthetic value with engineering reliability. Choosing Qinglong means choosing not just a material, but a double-curved GRC solution validated by more than a thousand projects.