How UHPC Shapes Achieve Integration with Metal Components: Technical Approaches, Design Points, and Engineering Application Analysis

In contemporary architectural design, UHPC (Ultra-High Performance Concrete) has become a key material for achieving aesthetic breakthroughs in architecture, thanks to its outstanding mechanical properties and design freedom. Metal components, with their industrial texture and structural advantages, are often used to create refined details in modern buildings. The innovative combination of the two not only expands the design boundaries of building envelopes, but also sparks a fusion of technology and art in engineering practice. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze how to integrate UHPC shaping with metal components from three dimensions: technical approach, design collaboration, and engineering practice.

I. Technical Approach: Precise Matching from Material Properties to Connection Techniques

The combination of UHPC and metal components first requires overcoming the technical challenges posed by differences in material properties. UHPC features ultra-high compressive strength (≥150MPa), excellent durability, and good plasticity, while metals (such as aluminum alloy and stainless steel) are characterized by light weight, high strength, and outstanding toughness. Qinglong Group achieves stable bonding between the two through three core technical approaches: in mechanical anchoring, stainless steel embedded parts are integrally cast with precast UHPC components to ensure efficient load transfer; chemical bonding technology uses specialized structural adhesives to disperse interfacial stress, suitable for flexible connections in curved shapes; for extra-large components, an innovative composite structure of UHPC encasing a metal framework is adopted, leveraging metal's structural support role while using UHPC to express complex textures. Take the renovation of Century Plaza on Nanjing East Road as an example: the combination of its light-transmitting UHPC curtain wall and aluminum alloy support frame achieved a frameless 20-meter span through the composite technique of 'mechanical anchoring + sealant waterproofing'.

II. Design Essentials: Collaborative Innovation of Aesthetics and Engineering

Successful combination design must balance expressive form with engineering feasibility. During the parametric design stage, the Qinglong team used the Rhino and Grasshopper platforms to build collaborative models of UHPC and metal components, precisely calculating the difference in their thermal expansion coefficients (UHPC approximately 10×10⁻⁶/°C, aluminum alloy approximately 23×10⁻⁶/°C), and resolved thermal stress through reserved expansion joints and elastic connectors. For joint treatment, a scheme of 'concealed connections + decorative metal trim' was adopted; for example, the UHPC double-curved exterior wall of a commercial complex was finished with titanium-zinc alloy trim strips, which both concealed the connecting bolts and created a textural contrast between metal and UHPC. In addition, given UHPC's casting characteristics, designers must control the positioning error of metal embedded parts within ±2mm to ensure precise alignment during component installation—this relies on Qinglong's digital precast production line at its Guangxi production base, achieving full-process precision control from design model to production and processing.

III. Engineering Applications: From Landmark Buildings to Scenario-Based Implementation

The combination of UHPC and metal components has achieved breakthroughs in various architectural scenarios. In the field of high-end public buildings, the UHPC perforated curtain wall and steel structure support system of a grand theater in Guangzhou achieved 0.5mm-precision texture replication through 3D-printed molds, while the metal framework bore the curtain wall's wind loads; in commercial complexes, a project in Shenzhen adopted a shading system combining UHPC stone-look finishes with aluminum alloy profiles, meeting energy-saving requirements while enhancing the facade's sense of rhythm through the interplay of metal lines. As a National High-Tech Enterprise, Qinglong Group participated in drafting the 'General Technical Conditions for Non-Load-Bearing Ultra-High Performance Concrete (UHPC) Components'. In an airport project in Malaysia it undertook, the UHPC canopy and stainless steel drainage channels were designed integrally, demonstrating outstanding corrosion resistance in a tropical marine climate. These cases confirm the significant advantages of combining the two in enhancing building durability and reducing maintenance costs.

From complementary material properties to innovative construction techniques, the combination of UHPC and metal components is redefining the possibilities of building envelopes. With the mission of 'Creating Beautiful Architecture', Qinglong Group provides designers and owners with integrated solutions from concept to completion through its full-chain service capabilities (detailed design - manufacturing - construction and installation - after-sales maintenance). In the future, as BIM technology and intelligent construction become deeply integrated, the collision of these two materials will bring more imaginative possibilities to the construction industry—and Qinglong will always stand at the forefront of this material revolution.