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An Analysis of the 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) has become a key material for shaping architectural aesthetics thanks to its lightweight, high-strength, and flexible formability. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group deeply understands the technical distinction between single-curved and double-curved GRC panels during processing. This article will reveal the core differences between the two types of panels from three aspects—process characteristics, technical challenges, and solutions—helping designers and owners achieve a precise transformation from concept to completion.

I. Process Characteristics: A Technical Leap from Flat to Curved Surfaces

The processing of single-curved GRC panels follows a relatively mature standardized process, with its core lying in the precise control of single-direction curvature through fixed molds. Qinglong Group employs industry-leading automated production lines, mixing glass fibers with specialty cement in strict proportions, and through processes such as vacuum casting and steam curing, ensures that panel flexural strength consistently reaches above 20MPa. Such panels are widely used in regular curved applications such as commercial building facades and sunshades. With the advantages of a high mold reuse rate and short production cycles (7-10 days for standard specifications), they are the cost-effective choice for volume projects.

Double-curved GRC panels, on the other hand, represent the pinnacle of GRC processing technology. Their surfaces involve bidirectional curvature changes along both the X-axis and Y-axis, placing extreme demands on mold design, material flowability, and forming precision. Leveraging the R&D strength of its provincial-level engineering technology center, Qinglong adopts parametric design (Rhino+Grasshopper) and 3D-printed mold technology to achieve complex shapes with a minimum curvature radius of 300mm. In the Century Plaza renovation project on Nanjing East Road, the Qinglong team used BIM technology to pre-assemble double-curved translucent GRC components, successfully achieving "mirror-level" alignment with the glass curtain wall, embodying the brand mission of "creating beautiful architecture."

II. Technical Challenges: Full-Process Difficulties from Material to Installation

The main difficulties of single-curved GRC panels lie in mold precision and material shrinkage control. If the mold curvature deviation exceeds 2mm/m, visual flaws are likely to appear at panel joints. Qinglong calibrates molds through laser scanning and uses its independently developed low-shrinkage formula (shrinkage rate ≤0.03%) to ensure consistency in volume production. Double-curved GRC panels, meanwhile, face three core challenges: first, double-curved molds are costly and have a low reuse rate—Qinglong reduced costs by 30% through modular mold design; second, materials are prone to uneven fiber distribution during double-curved forming—the Group adopted a centrifugal casting process to solve this pain point; third, installation positioning is difficult—its "3D laser scanning + modular installation" technology achieves ±1mm installation precision, ensuring the flawless realization of complex double-curved shapes in projects such as the Dongguan Women and Children's Activity Center.

III. Selection Strategy: Scientific Decision-Making to Match Project Needs

Choosing between single-curved and double-curved GRC panels requires comprehensive consideration of project budget, design complexity, and functional requirements. For scenarios such as European classical moldings and standard curved facades, single-curved GRC panels are the preferred choice due to their cost advantage (approximately 60-70% of double-curved panels); while projects pursuing ultimate aesthetics, such as landmark buildings and art venues, require double-curved GRC panels to push the boundaries of form. As a national "specialized, refined, distinctive, and innovative" enterprise, Qinglong recommends that clients bring in detailed design teams early on, using BIM technology to simulate the cost-effectiveness and feasibility of different options, achieving "the optimal balance between aesthetic effect and engineering cost."

From the standardized production of single-curved panels to the customized innovation of double-curved ones, the evolution of GRC processing technology has witnessed the aesthetic upgrade of the architectural decoration industry. With 58 patents and full-chain service capabilities, Qinglong Group continues to empower designers, bringing more imaginative ideas to life as real buildings. Whether it is a volume project pursuing cost-effectiveness or a landmark project challenging technical limits, choosing a professional GRC manufacturer is the only way to ensure a worry-free process from design to delivery.