Analysis of Processing Differences Between Single-Curve and Hyperbolic GRC Panels: Process Characteristics, Technical Challenges, and Application Scenario Comparison

In the field of contemporary architectural decoration, GRC (Glass Fiber Reinforced Concrete) has become an important material for shaping architectural aesthetics thanks to its lightweight, high-strength, and flexible forming properties. Among GRC products, single-curved GRC panels and double-curved GRC panels, as two common forms, differ significantly in processing techniques, technical challenges, and application scenarios. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze the core differences between the two from a professional perspective, providing designers and owners with precise material selection references.

I. Single-Curved GRC Panels: Efficient Application under Standardized Processes

Single-curved GRC panels refer to curved components with a single radius of curvature, and their processing technique centers on “standardized molds”. In production, Qinglong Group uses steel molds or GRP molds, achieving mass production of components through premix spray-up molding or hand lay-up mesh casting processes. The significant advantage of this process is that molds can be reused (usually more than 50 times), with high production efficiency and relatively controllable costs. Taking the facade project of a commercial complex as an example, the daily output of single-curved GRC sunshade panels can reach 300 square meters, approximately 40% higher than double-curved components.

On the technical side, the challenges of single-curved GRC panels focus on curvature precision control and surface flatness. Qinglong Group controls design curvature errors within ±2mm through BIM parametric design and 3D scanning technology, and uses specialized finishing mortar to ensure surface smoothness. Such components are widely used in cornices and columns of European classical architecture, as well as curved facades and shading systems of modern buildings. For example, in a landmark project Qinglong participated in, single-curved GRC decorative lines up to 12 meters long achieved seamless splicing.

II. Double-Curved GRC Panels: Technical Breakthroughs in Customized Processes

Double-curved GRC panels, having two mutually perpendicular radii of curvature, place higher demands on processing techniques. Qinglong Group adopts “digital twin + flexible mold” technology, generating component surface data through Rhino/Grasshopper parametric modeling, and then producing adjustable flexible molds via 3D printing or CNC engraving. During production, glass fiber mesh and cement-based materials must be laid layer by layer manually, combined with vacuum degassing technology to reduce internal air holes, ensuring component strength (flexural strength can reach over 20MPa).

The core technical challenges lie in the precise reproduction of double-curved surfaces and structural stability. For example, in a grand theater project, a double-curved GRC ceiling with a minimum radius of curvature of only 300mm required finite element analysis to optimize the reinforcement scheme, along with embedded metal connectors to the steel structure, ensuring wind load and seismic resistance after installation. Such components are suitable for special-shaped curtain walls, artistic sculptures, and complex interior forms of high-end public buildings. In the Nanjing East Road Century Plaza renovation project undertaken by Qinglong, translucent double-curved GRC panels achieved a perfect fusion of light and curved aesthetics.

III. Selection Strategy: Scenario Adaptation and Cost Balance

Selecting between single-curved and double-curved GRC panels requires comprehensive consideration of project needs. For commercial building facades with a high degree of standardization and limited budgets, single-curved GRC panels become the first choice thanks to their cost advantage (30%-50% lower than double-curved ones); while landmark buildings, cultural venues, and other scenarios pursuing unique aesthetics require double-curved GRC panels to bring creative designs to life. Qinglong Group recommends balancing effects and costs through a combined solution of “standard components + customized nodes”, for example, using single-curved panels in non-visual focus areas and double-curved forms at key locations.

As a national high-tech enterprise and a participant in formulating GRC industry standards, Qinglong Group has successfully delivered thousands of GRC projects with an annual production capacity of 600,000 square meters and full-chain service capabilities. Whether it is the efficient mass production of single-curved panels or the complex customization of double-curved ones, Qinglong adheres to the philosophy of “meticulousness and excellence”, providing customers with integrated solutions from detailed design to after-sales maintenance, supporting the mission of “creating beautiful architecture”.