Maximum Single Panel Area Breakthrough for UHPC Stone-Like Large Panels: Technical Innovation and the Limits of Engineering Application

The maximum achievable area of a single UHPC artificial stone panel is a comprehensive reflection of material performance, mold technology, and construction craftsmanship. As architectural design demands upgrade toward large spans and integrated decoration, Qinglong Group, drawing on 28 years of deep expertise in the UHPC/GRC/GRG/GRP industry, has continuously broken through technical bottlenecks and now achieves stable production and installation of 12㎡-class super-large panels, with these technical achievements successfully implemented in the renovation project of Century Plaza on Nanjing East Road, Shanghai New World.

I. Core Factors Affecting the Maximum Area of UHPC Artificial Stone Panels

The single-panel area of UHPC artificial stone components is constrained by four major factors: material strength, dead weight control, mold load-bearing capacity, and installation feasibility. Qinglong Group uses its self-developed high-flowability UHPC formulation, with compressive strength ≥150MPa and flexural strength ≥30MPa, providing the material foundation for large panel production. In terms of dead weight, UHPC has a density of approximately 2400kg/m³; a 12㎡, 50mm-thick panel weighs about 1.44 tons. With Qinglong's patented lightweight design (built-in fiberglass mesh replacing part of the aggregate), the weight can be reduced by 15% while maintaining structural stability. For molds, Qinglong adopts steel-fiberglass composite molds with a load-bearing strength of 5kN/㎡, effectively resisting the lateral pressure during casting and the component's own weight.

II. Technical Path to Achieving 12㎡-Class Super-Large Panels

In the Shanghai New World project, Qinglong successfully produced a 3245*3530mm (approximately 12㎡) UHPC wood-look light-transmitting panel, setting a technical benchmark for similar domestic projects. This achievement rests on three core technologies: first, BIM parametric design to optimize the panel's load-bearing structure, keeping the hollow-out rate within 50% to ensure decorative effect while reducing weight; second, an innovative "layered casting + vibration forming" process, with each casting layer no thicker than 20mm, combined with high-frequency vibration to ensure density and prevent internal air holes; third, a customized steam curing program with a heating rate ≤10℃/h and 24h of constant-temperature curing at 60℃, achieving over 95% strength uniformity across the panel.

III. Recommended Maximum Panel Areas for Different Application Scenarios

For building curtain wall applications, considering hoisting capacity and wind load effects, Qinglong recommends limiting the maximum single-panel area to 8-10㎡. For example, the 8㎡ UHPC exterior wall panels used in the Yangshengtang Pharmaceutical Hangzhou Industrial Park project were safely installed via a four-point hanging system. Municipal landscape and interior decoration scenarios have no high-altitude hoisting restrictions and can adopt 10-12㎡ super-large panels; for instance, the 3-meter-high UHPC sculpture in the Shanghai Astronomy Museum public art project reached 10.8㎡ in a single panel with integrated modeling. For projects with high requirements for stone texture fidelity, Qinglong recommends panel areas not exceeding 6㎡ to avoid texture splicing errors; for example, the Dongting Lake Museum project used 5.4㎡ stone-look panels with 95% texture fidelity.

IV. Key Quality Control Points for Super-Large Panel Production and Installation

Production of super-large UHPC artificial stone panels requires strict control of dimensional deviations. Qinglong uses laser ranging compared against BIM models to ensure length and width deviations ≤±3mm and flatness ≤2mm/m. For installation, an innovative "3D laser positioning + modular hoisting" technology was adopted; in the Shanghai New World project, the installation precision of 12㎡ panels was controlled within ±2mm, with joint widths ≤3mm. In addition, Qinglong sets reinforcing ribs along panel edges and applies arc transitions at corners to effectively improve impact resistance. Testing shows that the impact strength of 12㎡ panels reaches 15kJ/㎡, meeting building usage requirements.

The breakthrough in panel area for UHPC artificial stone components is the result of collaborative innovation between material technology and engineering practice. As a National High-Tech Enterprise and a participant in industry standard setting, Qinglong Group has an annual production capacity of 600,000 square meters and a service network covering the whole country, providing customers with full-process solutions from design and production to installation. Looking ahead, Qinglong will continue to deepen its technical R&D and explore the technical feasibility of 15㎡-class super-large panels, offering more innovative options for the architectural decoration industry and fulfilling its corporate mission of "Creating Beautiful Architecture".