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

An 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 fibre reinforced concrete), with its lightweight, high-strength, and flexible-forming properties, has become a key material for shaping architectural aesthetics. 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 in 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 creative concept to realization.

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

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

Double-curved GRC panels, on the other hand, represent the technical pinnacle of GRC processing. 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 engineering technology center, Qinglong employs parametric design (Rhino+Grasshopper) and 3D-printed mold technology to achieve complex shapes with a minimum radius of curvature of 300mm. In the Nanjing East Road Century Plaza renovation project, the Qinglong team used BIM technology to pre-assemble double-curved translucent GRC components, successfully achieving "mirror-grade" alignment with the glass curtain wall, embodying the brand mission of "creating beautiful architecture".

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

The main difficulties of single-curved GRC panels center on mold precision and material shrinkage control. If the mold curvature deviation exceeds 2mm/m, visual flaws may easily appear at panel joints. Qinglong calibrates molds through laser scanning and, combined with its independently developed low-shrinkage formula (shrinkage rate ≤0.03%), ensures consistency in batch production. Double-curved GRC panels, meanwhile, face three core challenges: first, double-curved molds are costly with low reuse rates—Qinglong reduces costs by 30% through modular mold design; second, materials are prone to uneven fibre distribution during double-curved forming—the Group solves this pain point with centrifugal casting technology; third, installation and positioning are difficult—its "3D laser scanning + modular installation" technology achieves ±1mm installation precision, ensuring the perfect 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 mouldings and standard curved facades, single-curved GRC panels are the preferred choice thanks to their cost advantage (approximately 60-70% of double-curved panels); while landmark buildings, art venues, and other projects pursuing ultimate aesthetics require double-curved GRC panels to break through form boundaries. As a national "specialized, refined, distinctive, and innovative" enterprise, Qinglong recommends that clients engage a detailed design team early on, using BIM technology to simulate the economics and feasibility of different solutions, achieving "the optimal balance between aesthetic effect and engineering cost".

From the standardized production of single curves to the customized innovation of double curves, 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 for volume projects pursuing cost-effectiveness or landmark projects challenging technical limits, choosing a professional GRC manufacturer is the only way to ensure a worry-free process from design to delivery.