Analysis of Fabrication Differences Between Single-Curved and Double-Curved GRC Panels: A Comparison of Process Characteristics and Technical Challenges

Analysis of Processing Differences Between Single-Curved and Double-Curved GRC Panels: A Comparison of Process Characteristics and Technical Challenges

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete), with its lightweight, high-strength, and flexible-forming properties, has become a key material for shaping architectural artistry. As two typical forms, single-curved GRC panels and double-curved GRC panels differ significantly in processing techniques and technical implementation. 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 the core differences between the two from the perspectives of process characteristics, technical challenges, and application scenarios, offering professional reference for designers and owners.

I. Single-Curved GRC Panels: Balancing Standardized Production and Efficient Installation

The processing of single-curved GRC panels is characterized by "regular curved surfaces," with a curvature radius typically greater than 300mm, making forming relatively easy. In terms of process, Qinglong adopts modular mold design, achieving mass production through steel molds or fiberglass molds with fixed curvature. For material formulation, alkali-resistant glass fibers and a high-strength cement matrix are carefully selected, and through spray-up molding or premix casting processes, the panels achieve a flexural strength of over 20MPa. The production cycle can be controlled at 7-10 days per batch, suitable for standardized decoration scenarios such as the exterior walls and sunshades of large commercial complexes.

The technical challenges mainly lie in mold precision and installation jointing. Through BIM-based pre-assembly and 3D scanning positioning, Qinglong controls the error between adjacent panels within ±2mm, avoiding "wavy patterns" at curved surface joints. For example, in a commercial landmark project, single-curved GRC curtain wall panels were efficiently installed using the "factory prefabrication + site dry-hanging" method, covering 100,000㎡ of panels and shortening the construction period by 30% compared with traditional techniques.

II. Double-Curved GRC Panels: The Challenge of Customized Shapes and Precision Manufacturing

Double-curved GRC panels, having curvature in two directions simultaneously, place higher demands on design development, mold development, and forming processes. Qinglong uses parametric design software (Rhino+Grasshopper) for digital modeling of double-curved surfaces, decomposing complex shapes into producible units through block optimization. For molds, 3D printing rapid prototyping technology is used to create master molds, which are then cast into flexible silicone molds, ensuring surface detail precision of 0.1mm. In terms of materials, to address the stress concentration of double-curved components, a continuous fiber reinforcement process is adopted, increasing fiber volume content to 5%-8% and improving crack resistance by 40% compared with single-curved panels.

Its core technical challenges lie in "double-curve control" and "structural stability." Taking a grand theater project as an example, the double-curved GRC ceiling panels had a minimum curvature radius of only 150mm. Through "finite element stress simulation + physical mechanical testing," Qinglong optimized the anchoring point distribution and reinforcement scheme, successfully resolving the problems of surface deformation and installation load-bearing. The production cycle of such customized products is typically 20-30 days per piece, and they are widely applied in high-end scenarios such as museums and art centers.

III. Process Comparison and Selection Recommendations

From a cost perspective, single-curved GRC panels have high mold reusability, with a total cost of about 60%-70% of that of double-curved panels, making them suitable for large-area standardized decoration; double-curved panels, due to their high degree of customization, have costs concentrated in design and mold development, making them more suitable for the artistic expression of landmark buildings. Qinglong recommends selecting the optimal process solution at the initial project stage through "full-process BIM collaboration," combining architectural function with aesthetic requirements. For example, the irregular overhanging eaves of a commercial complex can adopt a hybrid solution of "single-curved main body + partial double-curved accents," balancing economy and design appeal.

As a national high-tech enterprise and a participant in the formulation of GRC industry standards, Qinglong Group has always been committed to its mission of "creating beautiful architecture." Through 28 years of technical accumulation, it has achieved full-process independent R&D of single-curved and double-curved GRC panels. Whether for standardized projects at the million-square-meter level or individually customized artistic components, Qinglong can provide "one-stop" services from detailed design to after-sales maintenance, helping designers turn creativity into reality. Looking ahead, with the development of UHPC/GRC composite technology, Qinglong will continue to explore lighter and stronger curved surface forming solutions, driving technological innovation in architectural decoration materials.