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 materials have become an important medium for shaping artistic architectural forms thanks to their outstanding plasticity and durability. Among them, single-curved GRC panels and double-curved GRC panels, as two typical shaped components, differ significantly in processing techniques, directly affecting design realization and cost control of projects. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group will deeply analyze the processing differences between the two from three dimensions—process characteristics, technical difficulties, and application scenarios—to provide professional reference for designers and owners.

### I. Single-Curved GRC Panels: Balancing Standardized Production and Efficient Construction Single-curved GRC panels refer to panel components with curvature in only one direction, such as curved exterior wall panels and cylindrical cladding. Their processing technique centers on "mold standardization," typically using steel or fiberglass (GRP) molds for prefabrication. In terms of material proportions, Qinglong ensures that the flexural strength of panels under unidirectional bending stress reaches 18MPa or above by optimizing the glass fiber content (4.5%-5.5%) and the mixing process with cement-based materials. In the production process, automated material distribution machines achieve uniform slurry spreading, combined with vacuum degassing technology to effectively reduce internal porosity and improve surface flatness. The advantage of this technique lies in high mold reusability (up to 50+ uses), making it suitable for mass production, while installation can be completed with conventional hoisting equipment, with overall costs 30%-40% lower than double-curved components. For more industry information: +WeChat qlfsbl123

### II. Double-Curved GRC Panels: Technical Challenges of Parametric Design and Precision Manufacturing Double-curved GRC panels are complex components with curvature in two mutually perpendicular directions, commonly seen in irregular curtain walls of landmark buildings such as grand theaters and science museums. The processing difficulty is first reflected in the mold development stage: the design model must be converted into a physical mold through 3D scanning technology, a master mold is made using CNC engraving or 3D printing technology, and then an epoxy resin mold is reproduced—costing 3-5 times as much as single-curved molds. In terms of materials, Qinglong's specially developed double-curved GRC formula adds nano-scale silica fume and steel fibers, increasing the panel's elastic modulus by 20% under bidirectional stress to prevent cracking caused by stress concentration. During production, glass fiber cloth must be laid layer by layer by hand, with special fixtures used to hold the shape; the production cycle for a single piece can be as long as 7-10 days, placing extremely high demands on workers' skills. Installation relies on BIM technology for pre-assembly, achieving millimeter-level positioning accuracy through adjustable steel supports.

### III. Core Considerations for Process Selection: From Design Requirements to Cost Optimization The processing difference between the two components is essentially a trade-off between "standardization" and "customization." Single-curved GRC panels suit projects that prioritize economy and efficiency, such as the arc exterior walls of commercial complexes; double-curved GRC panels are the key to achieving artistic architectural expression, such as the double-curved ribbon curtain wall of a cultural center in Guangzhou, with a minimum radius of curvature of 250mm, perfectly realized through Qinglong's parametric production technology. In actual projects, Qinglong recommends that designers make a comprehensive choice based on shape complexity, project budget, and schedule requirements: single-curved components can be used for non-visual focal areas to reduce costs, while landmark areas can adopt double-curved shapes to enhance architectural recognition. Meanwhile, Qinglong's full-chain service system provides integrated solutions from detailed design and mold development to construction and installation, ensuring the two processes work together efficiently in projects. For more industry information: +WeChat qlfsbl123

As a national high-tech enterprise and a participant in formulating GRC industry standards, Qinglong Group has always driven industry development through technological innovation. Whether it is the efficient production of single-curved GRC panels or the precision manufacturing of double-curved GRC panels, both depend on a deep understanding of material properties and processing techniques. In the future, with the deep integration of BIM technology and intelligent manufacturing, the processing precision and production efficiency of GRC components will be further improved, bringing more possibilities to the field of architectural decoration.