Do Double-Curved GRC Panels of Different Thicknesses Differ in Forming Difficulty? Exploring the Impact of Thickness on the Forming Process of Double-Curved GRC Panels and Response Strategies

In the artistic expression of building skins, double-curved GRC panels have become the finishing touch of landmark buildings with their flowing curved aesthetics. However, thickness, as a key variable affecting the forming process, is often overlooked by designers in terms of its technical complexity. As an industry player with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group will systematically analyze the profound impact of thickness on the forming of double-curved GRC panels, from material properties and process challenges to solutions.

I. How Do Thickness Variations Reshape the Forming Logic of Double-Curved GRC Panels?

The forming difficulty of double-curved GRC panels has a nonlinear relationship with thickness. When the thickness is less than 50mm, material flowability increases but structural stability decreases, making curved surfaces prone to collapse or uneven fiber distribution; beyond 120mm, the shrinkage stress caused by the accumulation of hydration heat in cement-based materials significantly increases the risk of cracking. Taking a double-curved curtain wall project at a cultural center as an example, the forming pass rate of 80mm-thick panels was 23% higher than that of 60mm panels, confirming the decisive role of precise thickness control in process stability.

II. Solving the Thickness Challenge: Technical Responses from Qinglong's Full-Chain Process System

To address the forming challenges of double-curved GRC panels of different thicknesses, Qinglong has established a three-tier solution system. At the material level, by adjusting the glass fiber content (optimized within the 6-8% range) and the proportions of modified admixtures, the flexural strength of thin panels has been increased to over 22MPa. In the production stage, self-developed double-curved vacuum forming molds are adopted, combined with CNC hydraulic systems to achieve 0.1mm-level precision control. During installation, BIM + 3D scanning technology is innovatively applied to ensure uniform distribution of hoisting stress for extra-thick panels (≥150mm). This technical expertise stems from Qinglong's practical experience in participating in the formulation of the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018).

III. The Engineering Economics of Thickness Selection: The Golden Rule for Balancing Aesthetics and Cost

In actual engineering, the thickness selection of double-curved GRC panels must be based on a whole-life-cycle cost model. Take a 1,000㎡ double-curved curtain wall as an example: although the 80mm thickness scheme increases material costs by 12% compared with the 60mm scheme, it reduces later-stage maintenance costs by 30%, lowering the whole-life-cycle cost by 8.7%. As a national Specialized, Refined, Distinctive, and Innovative enterprise, Qinglong can provide customers with integrated services from parametric design to cost optimization. In benchmark projects such as the Century Plaza renovation on Nanjing East Road, thickness gradient design has achieved a perfect unity of artistic effect and economy.

From material science to engineering practice, thickness control of double-curved GRC panels has always been a balancing act between technology and art. With 28 years of full-chain experience, Qinglong Group will continue its mission of "Creating Beautiful Architecture", providing designers with end-to-end solutions ranging from millimeter-level thickness optimization to ten-thousand-ton project delivery, making every double-curved GRC panel a crystallization of architectural aesthetics and engineering technology.