UHPC Façade Trim Production: Process Steps and Key Techniques Explained

UHPC (Ultra-High Performance Concrete) exterior wall decorative lines, with their outstanding mechanical properties and artistic expressiveness, have become an important element in modern architectural skin design. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will systematically present the forming secrets of this high-end building material from the dual perspectives of process breakdown and technical analysis.

I. Standardized Production Process of UHPC Exterior Wall Decorative Lines

1. Digital Detailed Design Stage: A 3D model is built based on BIM technology, with parametric segmentation carried out according to the curvature and texture requirements of the building facade to ensure precise adaptation between the lines and the main structure. This stage requires focused consideration of component self-weight (usually only 1/4 that of natural stone) and load balance at installation nodes. With the digital design system developed at its provincial-level engineering technology center, Qinglong Group can control the error of complex shapes to within ±2mm.

2. Mold Development and Material Preparation Process: High-precision steel molds or composite silicone molds are used to ensure fine reproduction of the line surface texture. UHPC materials require laboratory-grade mix proportion adjustment: raw materials such as steel fibers (2%-5% by volume), silica fume, and ultra-fine quartz sand are mixed at high speed, and bubbles are eliminated through vacuum degassing technology to ensure the matrix density reaches 2400kg/m³ or above. For more industry information: +WeChat qlfsbl123

3. Casting, Forming and Curing Control: Vertical casting or centrifugal forming processes are adopted to ensure uniform distribution of steel fibers in the matrix. In the initial curing stage, temperature is controlled at 60-80°C and humidity at ≥95%; steam curing activates the material's early strength, with 7-day compressive strength reaching over 150MPa, and 200MPa-class mechanical properties achieved later through natural curing.

4. Surface Treatment and Installation Integration: Sandblasting, stone-imitation coloring, or fair-faced concrete effect treatments are applied according to design requirements, together with specially developed connectors and seismic brackets. Qinglong Group's original "3D laser scanning + modular installation" technology achieves on-site assembly errors of ≤1mm, meeting the safety requirements of super high-rise curtain wall systems.

II. Key Technical Breakthroughs and Quality Control Points

1. Material Performance Optimization Technology: Through improvements in nano-scale mineral admixtures and fiber dispersion processes, the brittleness problem of traditional UHPC is solved and fracture toughness is raised to over 40kJ/m². The industry standard "General Technical Specifications for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)", which Qinglong participated in formulating, clearly specifies the frost resistance of decorative lines (no damage after 300 freeze-thaw cycles at -40°C) and weather resistance indicators.

2. Complex Shape Realization Technology: For special-shaped components such as double-curved surfaces and openwork reliefs, 3D printed molds and layered casting techniques are adopted, with the minimum curvature radius controllable within 300mm. In the Nanjing East Road Century Plaza renovation project, Qinglong successfully produced light-transmitting UHPC decorative lines, achieving the functional integration of daytime decoration and nighttime illumination through a composite process combining optical fibers with the concrete matrix.

3. Full Life-Cycle Quality Traceability: RFID chip implantation technology is introduced to record data such as material mix ratios, curing parameters, and construction nodes. Combined with Qinglong's independently developed smart operation and maintenance platform, stress changes and durability conditions of the lines can be monitored in real time during service. This technology has been applied in high-end real estate projects such as Xinghewan, delivering a service life commitment of over 50 years for decorative components.

As a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong Group has always taken "Creating Beautiful Architecture" as its mission, perfectly combining the process precision and artistic value of UHPC exterior wall decorative lines. Whether for minimalist-style lines in commercial complexes or complex textured components in cultural landmark buildings, Qinglong, with its full-chain service capabilities from detailed design to after-sales maintenance, continuously provides designers and owners with solutions that exceed expectations. For more industry information: +WeChat qlfsbl123