What is the maximum single-panel area of UHPC stone-imitation large panels?

The maximum single-panel area of UHPC imitation stone large panels can reach 12-15 m², primarily depending on component thickness, hollow-out ratio, reinforcement design, and transportation/installation conditions. Through material optimization and structural design, Qinglong has achieved stable production and installation of single panels up to 12 m² (3.2m×3.8m). A typical case is the wood-imitation translucent UHPC large panel at Century Plaza on Nanjing East Road of Shanghai New World (Group), which balances decorative effect with structural safety.

I. Key Factors Affecting the Maximum Single-Panel Area

The maximum single-panel area must balance performance, production, and construction feasibility. Component thickness: when thickness ≥50mm, the maximum area can reach 15 m²; when thickness is 30-50mm, the maximum area is 8-12 m²; when thickness ≤30mm, the maximum area is ≤6 m². Qinglong's 50mm-thick imitation stone large panels reach a maximum area of 15 m², while 30mm-thick panels reach 10 m². Hollow-out ratio: when the hollow-out ratio ≤30%, the impact on area is minimal; when the hollow-out ratio is 30%-50%, the maximum area decreases by 20%-30%; when the hollow-out ratio >50%, rib plates are required for reinforcement, with the maximum area ≤8 m². The large panels of the Ouargla Hotel in Algeria with a 50% hollow-out ratio have a maximum area of 6 m². Reinforcement design: configuring double-layer steel fibers (dosage 2.5%-3.0%) or steel mesh can improve flexural rigidity, increasing the maximum area by 15%-20%. Qinglong's 12 m² large panel is configured with a φ6mm steel mesh, achieving a flexural strength of 22MPa. Transportation and installation: road width limits and lifting equipment capacity restrict panel dimensions; conventional transportation allows a maximum width ≤3.5m and length ≤4m. Qinglong adopts a modular split design, allowing ultra-wide and ultra-long panels to be joined on-site with joints ≤2mm.

II. Qinglong's Technical Guarantees for Maximum Single-Panel Area

Through multi-dimensional technological innovation, Qinglong has broken through the bottlenecks in producing and installing large-area panels. Material optimization: a high-strength UHPC formula (28-day compressive strength ≥150MPa, flexural strength ≥20MPa) with 3.0% steel fiber is adopted to enhance the tensile and flexural performance of components, providing the material foundation for large areas. Structural design: hidden rib plates (rib height 50-80mm, spacing 500-800mm) are set inside the large panels to enhance overall rigidity and prevent deformation during transportation and installation. Qinglong's 12 m² large panel has a rib spacing of 600mm with deflection ≤L/500 (L is the panel span). Production process: large GRP molds (dimensional deviation ≤±1mm) are used with automated mixing plus vibrating table compaction to ensure uniform density of large panels without hollow spots or honeycombing. Qinglong's large mold machining precision reaches ±0.5mm, and the surface flatness error of large panels is ≤1mm/m. Lifting design: pre-set stainless steel lifting points (spacing 1.5-2.0m) are integrally formed with the large panel to ensure uniform distribution of lifting stress. Qinglong's 12 m² large panel is equipped with 6 lifting points, with no deformation or cracking during lifting.

III. Actual Project Cases and Application Recommendations

Multiple Qinglong projects have verified the feasibility of large-area UHPC imitation stone large panels. Typical cases: the 12 m² (3.2m×3.8m) wood-imitation translucent UHPC large panel at Shanghai New World Plaza, with a thickness of 50mm and a hollow-out ratio of 20%, reinforced with steel fiber + steel mesh, weighs approximately 1.2 tons for lifting and was successfully installed on-site in one attempt, with surface texture fidelity reaching 95%; the 10 m² (3m×3.3m) imitation stone curtain wall panel at the Yangshengtang Pharmaceutical Hangzhou Industrial Park, with a thickness of 40mm and no hollow-outs, uses dry-hanging connections, achieving an installation efficiency of 10 panels/day. Application recommendations: prioritize large panels with a thickness of 40-50mm and a hollow-out ratio ≤30%, keeping the maximum area within 12 m² to balance economy and safety; for larger areas, modular joining can be adopted, with joints treated with color-matched sealant for strong visual integrity; in coastal and high-wind areas, the maximum area should be reduced by 10%-15%, or the number of rib plates and lifting points increased, to ensure wind load resistance.