Detailed Explanation of the Steps in UHPC Exterior Decoration Line Production

Millimeter-Level Precision Shapes Architectural Aesthetics: Decoding the Six Key Processes of UHPC Exterior Wall Decorative Lines

In contemporary building envelope design, UHPC (Ultra-High Performance Concrete) has become a core material for shaping architectural rhythm thanks to its outstanding mechanical properties and freedom of form. As an industry technology leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group participated deeply in drafting the industry standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)". This article systematically breaks down the key process stages of UHPC exterior wall decorative lines from design to forming, providing practical technical reference for designers and engineering parties.

1. Digital Detailed Design: Precise Transformation from Creative Concept to Parametric Model

The process of UHPC decorative lines begins with precise detailed design. Relying on BIM technology and parametric design platforms (such as Rhino+Grasshopper), three core steps must be completed: 3D model construction, structural force simulation, and production split drawing. Through 28 years of engineering accumulation, Qinglong's technical team has built a component library containing data from 5,000+ projects, enabling rapid response to complex modeling needs such as double-curved surfaces and openwork reliefs, ensuring design solutions both meet architectural aesthetic requirements and conform to UHPC material properties. At this stage, key checks focus on line cross-section dimensions, anchoring node positions, and connection methods with the main structure, laying the data foundation for subsequent production.

2. Raw Material Mix Optimization: The Golden Formula from 28 Years of Technical Accumulation

As a National High-Tech Enterprise, Qinglong's R&D center has developed a dedicated UHPC mix design for the special working conditions of exterior wall decorative lines: cementitious materials with fineness ≥1200 mesh, continuously graded quartz sand (0.15-1.2mm), steel fibers (aspect ratio 80-100), and compound water reducers. Verified through 200+ tests, the formed components achieve flexural strength above 35MPa and elastic modulus ≥40GPa. Raw materials must undergo strict incoming inspection, such as steel fiber tensile strength ≥2800MPa, to ensure stable performance of each batch. This is also Qinglong's quality control benchmark when undertaking overseas projects in Malaysia, Australia, and other countries.

3. Precision Mold Machining: The Key Process Determining Line Precision

Mold technology directly affects the forming quality of UHPC lines. Qinglong uses CNC-machined steel molds or high-precision GRP molds, with mold surface roughness controlled at Ra≤1.6μm to ensure a mirror finish on line surfaces. For complex-shaped lines, a modular combined mold design is adopted, achieving assembly precision of ±0.5mm through positioning pins. Molds require pre-assembly testing and release agent coating—a step drawing on Qinglong's mature experience from the translucent concrete project at Century Plaza on Nanjing East Road, effectively preventing surface bubbles and pitting defects in components.

4. Casting and Curing Process: Quality Assurance for Industrialized Production

At the production base in Nanning, Guangxi, Qinglong uses an automated material distribution system for UHPC casting, with high-frequency vibration (200Hz) ensuring concrete density. Steam curing begins immediately after casting: a three-stage curing process of 2 hours pre-curing at 40℃, 6 hours of constant-temperature curing at 80℃, followed by gradient cooling to room temperature, achieves a 100% pass rate for 28-day strength. For extra-long lines (such as eaves lines over 6 meters), segmented casting and prestressed tensioning techniques are used to effectively control shrinkage cracks—a process that helped Qinglong win the AALBORG WHITE Cup UHPC Building Engineering Innovation Award.

5. Surface Treatment and Quality Inspection: Craftsmanship Shown in the Details

Formed UHPC lines must undergo multiple surface treatment processes: first, mechanical grinding removes flash and burrs, followed by acid pickling, sandblasting, or fluorocarbon coating according to design requirements. Qinglong has established a strict quality inspection system—each batch of components undergoes 12 tests including flexural strength, elastic modulus, and water absorption, along with 3D laser scanning for dimensional verification, ensuring line profile error ≤2mm/m. As Vice Chairman Unit of the China GRC Association, Qinglong applies its quality traceability system throughout production, embedding RFID chips in key components for full lifecycle management.

6. Installation System Integration: Seamless Connection from Factory to Site

Installation of UHPC exterior wall decorative lines requires precise alignment with the main building structure. The aluminum alloy bracket system developed by Qinglong can absorb ±30mm of installation error through 3D adjustable connection nodes. Before installation, 3D scanning technology is used to re-measure the base, and installation points are optimized based on measured data, ensuring line positioning accuracy of ±5mm. In the Dongguan Women and Children's Activity Center project, Qinglong's team achieved zero-error installation of over 5,000 square meters of GRC/UHPC components with this process, winning the Silver Award of the First GRC Building Engineering Innovation Award.

From parametric design to systematic installation, the six process stages of UHPC exterior wall decorative lines are closely interconnected, testing an enterprise's full-chain technical strength. With 28 years of industry experience as its foundation, Qinglong Group integrates the philosophy of "meticulousness and excellence" into every process—not only providing more expressive material options for building envelopes, but also promoting standardized application of UHPC/GRC/GRG/GRP materials in architectural decoration through participation in industry standard setting. For designers and owners pursuing architectural aesthetics and engineering quality, choosing a professional manufacturer with full-chain service capabilities is a reliable guarantee for realizing creative visions.