What Are the Steps in Producing UHPC Exterior Wall Decorative Lines: Detailed Analysis and Key Technical Points

The aesthetic expression of architecture often lies in the details, and UHPC exterior wall decorative lines are the key elements that outline a building's silhouette and enhance its facade texture. As an industry veteran with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will systematically analyze the manufacturing process of UHPC exterior wall decorative lines in this article, offering designers and owners a professional perspective from material selection to finished product delivery.

I. Material Properties of UHPC: The Performance Foundation of Exterior Wall Decorative Lines

UHPC (Ultra-High Performance Concrete), with its outstanding performance of compressive strength exceeding 150MPa and elastic modulus reaching 40GPa, has become the ideal material for exterior wall decorative lines. Its fiber reinforcement system and dense microstructure endow the product with lightweight yet high-strength characteristics, reducing weight by more than 30% compared with traditional GRC lines, while offering the advantages of weather resistance, impermeability, and Class A fire resistance. In material formulation development, Qinglong Group adjusts the steel fiber content and silica fume ratio, enabling UHPC lines to maintain structural stability in environments ranging from -40℃ to 70℃—a technical indicator certified by the National Building Materials Testing Center.

II. The Complete Manufacturing Process: Precision Control from Design to Forming

1. Detailed Design and Mould Development
Parametric modeling is carried out based on the building's CAD drawings, with Rhino and Grasshopper software used to optimize the curvature radius of the lines (as small as 200mm) and the surface texture. High-precision steel moulds or fibreglass moulds are selected to ensure forming dimensional errors of ≤1mm/m. Qinglong's production base is equipped with 5-axis CNC machining centers, enabling the rapid manufacture of complex mould shapes; for example, in the Nanjing East Road Century Plaza renovation project, the mould machining precision of translucent UHPC lines reached the 0.5mm level.

2. Material Mixing and Casting
A planetary mixer is used for dry material pre-mixing (with the cement, silica fume, and quartz sand ratio strictly controlled at 1:0.2:1.5), after which steel fibers (2% by volume) are added and wet-mixed for 90 seconds to ensure uniform fiber dispersion. Vacuum-assisted forming technology is adopted during casting to eliminate air bubbles and improve density. For irregular-shaped lines, Qinglong's proprietary inclined casting method solves the void defects of traditional vertical casting; this process has been granted a national invention patent (Patent No. ZL2022XXXXXXXXX).

3. Curing and Surface Treatment
Steam curing at 90℃ for 24 hours is applied to accelerate the hydration reaction, achieving a 7-day compressive strength of up to 120MPa. Surface treatment is then performed by sandblasting or waterjet cutting to create various textures such as stone-look and lychee finishes. Qinglong's CNC sandblasting equipment can precisely control surface roughness to meet designers' personalized decorative requirements; for example, in the Dongguan Women and Children's Activity Center project, the texture consistency between GRC and UHPC lines reached over 95%.

III. Key Technical Points: Core Aspects for Ensuring Engineering Quality

During installation, 3D laser scanning positioning technology is used to achieve precise alignment between the lines and the building structure, with installation errors controlled within ±2mm. To address thermal expansion and contraction, the elastic connection joints developed by Qinglong allow 15mm of displacement, effectively preventing cracking caused by thermal stress. In addition, embedded RFID chips enable full life-cycle traceability, complemented by BIM technology for digital management—a system that has been successfully applied in multiple landmark projects.

From material R&D to project delivery, the manufacturing of UHPC exterior wall decorative lines is a fusion of technology and art. As a national high-tech enterprise, Qinglong Group has always upheld the mission of “creating beautiful architecture.” Through 28 years of technical accumulation, it has transformed the performance advantages of UHPC into aesthetic value for buildings. Whether for the modern minimalist lines of commercial complexes or the complex irregular components of cultural venues, Qinglong can provide full-chain solutions from detailed design to after-sales maintenance, helping designers bring their creativity to life and injecting lasting vitality into architecture.