How to Achieve Integration of UHPC Forms with Metal Components? Qinglong Connection Technology and Coordinated Solutions

The combination of UHPC shapes with metal components (stainless steel, aluminum alloy, steel plates) must balance strength, compatibility and aesthetics, achieved mainly through three methods: "mechanical connection, chemical bonding and integrated forming". Relying on patented connection technology, anti-corrosion treatment and precise adaptation, Qinglong Group has achieved perfect synergy between the two in the Shanghai New World and Huawei Songshan Lake projects, with connection strength ≥8kN and a service life matching that of UHPC (≥50 years).

I. Mechanical Connection: Secure and Reliable, Suitable for Heavy-Load Scenarios

Embedded connectors: Stainless steel connectors (bolts, steel plates) are embedded during UHPC shape production, and metal components are fixed to the embedded parts with bolts, achieving connection strength ≥10kN. Qinglong's Shanghai New World translucent panels have embedded stainless steel bolts connected to a metal light-guiding frame, reaching a strength of 12kN with excellent wind load resistance. Post-installed anchor connection: After the UHPC shape is installed, holes are drilled to insert chemical anchors for connecting metal components (such as decorative lines and support frames), with anchor embedment depth ≥100mm. Qinglong's post-installed anchor connection strength is ≥8kN, suitable for scenarios where metal components are added later. Mortise-and-tenon connection: The UHPC shape reserves mortise slots while the metal component is made with matching tenons; together with an elastic cushion layer (rubber pads), mechanical interlocking is achieved. A Qinglong art sculpture uses a mortise-and-tenon connection for its metal base, which is easy to disassemble and assemble, with a tight, loosening-free connection.

II. Chemical Bonding: Invisible and Aesthetic, Suitable for Lightweight Scenarios

Special structural adhesive bonding: Epoxy-based structural adhesive is used to bond UHPC with metal components, with bonding strength ≥3MPa. Qinglong's structural adhesive offers excellent weather resistance, remaining stable in environments from -40°C to 80°C, suitable for both indoor and outdoor scenarios. Bonding surface treatment: The UHPC bonding surface is ground rough (roughness Ra≥3.2μm) and the metal surface is derusted and degreased to ensure firm bonding; after Qinglong's treatment, the bonding surface peel strength is ≥2.5MPa with no risk of debonding. Invisible bonding design: Bonding surfaces are hidden inside the shape, leaving no visible connection marks. In Qinglong's Huawei Songshan Lake project, the GRG/UHPC interior elements and metal lines use invisible bonding for a unified, aesthetic appearance.

III. Integrated Forming: Cooperative Load-Bearing, Suitable for Complex Shapes

Embedded metal frames: A metal frame (stainless steel tubes, aluminum profiles) serves as the internal support of the UHPC shape; during production, the frame is fixed inside the mold and UHPC is cast to form an integral whole. A large double-curved artistic shape by Qinglong embeds a stainless steel frame for cooperative load-bearing, improving deformation resistance by 50%. Embedded metal decorations: Metal decorative parts (such as metal nameplates and decorative pins) are embedded in the UHPC mold and integrally cast, ensuring tight connection with no risk of later detachment. The UHPC wall of a Qinglong commercial complex features embedded metal decorative pins, creating a refined appearance.

IV. Core Guarantees of Qinglong's Combination Technology and Project Verification

Anti-corrosion treatment: Metal components are made of hot-dip galvanized steel (galvanized layer thickness ≥80μm) or 316 stainless steel, and anti-corrosion coating is applied at connection points to prevent electrochemical corrosion; the connection areas in Qinglong's seaside project have shown no rusting or separation for 5 years. Compatibility design: Considering the difference in thermal expansion coefficients between UHPC and metal (UHPC 10-12×10⁻⁶/°C, metal 16-23×10⁻⁶/°C), expansion gaps (2-5mm) are reserved; Qinglong's project in a high-temperature environment reserves a 3mm gap to absorb thermal deformation. Project verification: The Shanghai New World UHPC wood-effect translucent panels are combined with metal light-guiding rods using a dual method of embedding + bonding, balancing light transmission and connection strength; in the Huawei Songshan Lake project, GRG/UHPC and metal lines are invisibly bonded for a seamless appearance; the Hainan Poly Peninsula No. 1 UHPC exterior walls are mechanically connected with metal hangers, meeting typhoon resistance standards.

The combination of UHPC shapes with metal components requires selecting the appropriate method based on the scenario, with strength, corrosion resistance and compatibility being the core considerations. With its diverse connection technologies, refined processing techniques and project experience, Qinglong Group enables the two to work in synergy, offering more creative possibilities for architectural shapes. Choosing a manufacturer with proven combination technology capabilities is the key to their successful integration.