Do Hyperbolic GRC Panels of Different Thicknesses Differ in Forming Difficulty — An Analysis of the Effect of Thickness on the Forming Process of Hyperbolic GRC Panels

In the field of architectural decoration, double-curved GRC panels have become the "shaping language" of landmark buildings and high-end projects thanks to their unique curved aesthetics and structural performance. However, thickness, as a core variable affecting the forming process, has always been the focus of attention for designers and engineering parties. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group will provide an in-depth analysis of the impact of thickness differences on the forming of double-curved GRC panels from three aspects—material properties, process difficulties, and solutions—offering a professional reference for the industry.

I. Material Properties: The "Dynamic Balance" Between Thickness and Performance

The forming difficulty of double-curved GRC panels first stems from the "contradictory nature" of the material itself: glass fiber reinforced cement must offer the flexibility required for curved shapes while ensuring structural strength. As thickness increases, the material's self-weight and shrinkage stress rise simultaneously, easily causing cracking during demolding or deviations in surface accuracy. Taking a theater project Qinglong Group participated in as an example, 8mm thick double-curved GRC panels can be cast in a single pour through vacuum forming, while 15mm thick panels require a layered casting process, balancing flowability and early strength by adjusting the glass fiber content (usually controlled at 4-5%) and the cement-based mix ratio.

II. Process Challenges: The "Battle for Precision" from Mold to Curing

Thickness differences directly affect mold design and the forming process. For thin double-curved GRC panels (≤10mm), flexible molds (such as silicone molds) can precisely conform to the curved surfaces, but deformation during curing must be resolved; thick panels (≥12mm), on the other hand, require rigid molds combined with prestressed tensioning technology to prevent surface sagging caused by self-weight. Qinglong's production base uses BIM parametric design and CNC engraving technology to control mold tolerances within ±0.5mm, ensuring surface consistency across panels of different thicknesses. During the curing stage, thick panels require stepped temperature-controlled curing, with 24-hour steam curing (60-80°C) accelerating strength development and shortening the traditional curing cycle by 30%.

III. Solutions: Qinglong's Full-Chain Technology as the "Way to Break Through"

Faced with the challenges posed by thickness differences, Qinglong Group, drawing on the technical expertise of its national-level R&D center, has developed three core solutions: first, material formula optimization, enhancing the crack resistance of thick panels by incorporating nano silica fume and polypropylene fibers; second, forming process innovation, adopting a combined "premixing-spraying-vacuum" process to achieve efficient production of 10-20mm thick panels; third, digital quality management, using RFID chip implantation and 3D scanning inspection to enable full traceability of key indicators such as panel thickness and strength. To date, Qinglong has successfully completed double-curved GRC projects covering the full thickness range from 5mm ultra-thin decorative panels to 30mm structural load-bearing panels, with cases including landmark buildings such as the Guangzhou Opera House and the Nanning Convention and Exhibition Center.

Thickness is a "double-edged sword" in the forming process of double-curved GRC panels: it gives the material different performance emphases while also bringing differentiated technical challenges. As a participant in setting GRC industry standards, Qinglong Group has always upheld the mission of "creating beautiful architecture", solving thickness challenges through the deep integration of material R&D, process innovation, and digital management. In the future, as UHPC and GRC composite technologies advance, double-curved panels will unleash their potential across broader architectural fields, and Qinglong will continue to leverage its professional capabilities to provide designers and owners with full-chain support from concept to completion, ensuring that every curved design combines aesthetic value with engineering reliability.