Analysis of Key Steps and Technical Points in the Factory Prefabrication Stage of UHPC Curtain Wall Panel Production

**Factory Prefabrication of UHPC Curtain Wall Panels: Decoding the Craftsmanship Behind Building Facades**

Driven by both contemporary architectural aesthetics and engineering technology, Ultra-High Performance Concrete (UHPC) has become the new favorite for landmark building curtain walls thanks to its outstanding mechanical properties and sculptural expressiveness. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group knows that the factory prefabrication stage is the core factor determining the quality of UHPC curtain wall panels. This article systematically analyzes the key steps and technical essentials of the prefabrication process, providing designers and owners with a full-chain professional perspective from materials to finished products.

**I. The Core Prefabrication Process of UHPC Curtain Wall Panels: Precise Control from Mix Design to Molding**

Factory prefabrication of UHPC curtain wall panels is a systematic engineering undertaking that integrates materials science and engineering technology, involving five key steps. The first is **mix proportion optimization**, which requires precise control of the gradation of raw materials such as cement, silica fume, and ultra-fine quartz sand. Through 28 years of formula iteration, Qinglong Group has developed dedicated mix designs for different climate zones, ensuring that the material's 28-day compressive strength consistently exceeds 150MPa. The second is **fiber dispersion technology**, which uses German-imported high-speed mixers to achieve three-dimensional uniform distribution of steel fibers—a core technology for preventing component cracking. Qinglong's proprietary "stepped mixing method" can raise fiber dispersion to over 98%.

In the **mold engineering** stage, high-precision steel molds and modular design are key. Qinglong has introduced BIM parametric modeling technology to keep mold machining tolerances within ±0.5mm, and combined with vacuum casting technology, this ensures the precise realization of complex shapes such as double curvature and hollow-out forms. The **curing process** after molding is equally meticulous, adopting a combined "steam curing + natural curing" system. In the constant-temperature, constant-humidity curing chambers at the Guangxi Nanning production base, component surface hardness can reach 90% of design strength within 7 days. Finally comes **quality inspection**. Through 28 testing indicators including ultrasonic flaw detection and load testing, Qinglong has established an industry-leading "QR code traceability system," enabling full life-cycle management of every curtain wall panel from raw materials to finished products.

**II. Technical Difficulties and Innovative Breakthroughs: Solving the Four Major Challenges of UHPC Prefabrication**

The prefabrication of UHPC curtain wall panels faces multiple technical challenges, and Qinglong Group has developed unique solutions through continuous innovation. To tackle the challenge of **deformation control for oversized panels**, it developed a "prestressed composite system" with built-in carbon fiber reinforcement, keeping the deflection of panels over 6 meters long within L/400—better than industry standards. In terms of **surface texture optimization**, nano-scale release agents and mirror-formwork technology enable free switching between fair-faced concrete effects and stone textures, meeting the personalized needs of high-end buildings.

**Joint node treatment** is key to ensuring installation precision. Qinglong's "mortise-and-tenon connection system," combined with 3D laser scanning positioning, keeps on-site installation errors within ±2mm. In addition, for **durability enhancement** of UHPC materials, the incorporation of composite mineral admixtures and rust inhibitors—verified by accelerated aging tests—gives the material a weathering life of over 50 years, far exceeding traditional curtain wall materials. These technical breakthroughs have enabled Qinglong UHPC curtain wall panels to be successfully applied in landmark projects such as the Nanjing East Road Century Plaza renovation, winning the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

**III. The Decisive Impact of the Prefabrication Stage on Project Value: The Art of Balancing Efficiency, Cost, and Quality**

The factory prefabrication model brings significant value enhancement to UHPC curtain wall panel projects. Qinglong achieves **schedule compression** through standardized production. Taking the Nanning production base as an example, a production line with a monthly capacity of 5,000 square meters can shorten the project prefabrication cycle by more than 30%. In terms of **cost control**, mold reuse rates have been raised to 80%, and combined with BIM technology to optimize panel layout design, material utilization can reach 95%, effectively reducing waste costs. More importantly, **quality stability** is fundamentally guaranteed: precise control in the factory environment keeps the product pass rate stable at 99.5%, far higher than on-site casting levels.

As a national high-tech enterprise and a participant in formulating UHPC industry standards, Qinglong Group has integrated its 28 years of full-chain experience into the prefabrication stage, forming an integrated service capability from detailed design to after-sales maintenance. Whether it is the irregular facades of commercial complexes or the artistic curtain walls of cultural buildings, the factory prefabrication technology of Qinglong UHPC curtain wall panels is redefining the facade aesthetics of modern architecture with "millimeter-level precision" and "artwork-grade texture." Choosing a supplier with full industry chain strength is the key to ensuring the success of UHPC curtain wall projects.