How Many Ways to Combine UHPC Exterior Walls with Insulation Layers? Integrated Technology and Qinglong Group Composite Systems

There are three mainstream processes for combining UHPC exterior walls with insulation layers: "bonded composite, mechanical connection, and cast forming", which should be selected based on building height, insulation material, and construction conditions. Qinglong Group has concluded from 28 years of engineering practice: bonded composite (applicable height ≤24m) uses epoxy structural adhesive (bond strength ≥1.0MPa); mechanical connection (applicable to any height) uses thermal-break anchors (anchoring force ≥3kN); cast forming (factory precast) achieves seamless integration through the molding process. In a super high-rise project in Shenzhen, we adopted the mechanical connection method, enabling the UHPC-rock wool composite panels to pass the four-performance curtain wall testing, with wind pressure resistance reaching 5.0kPa and stable insulation performance.

Bonded Composite Process and Technical Key Points

A two-component epoxy adhesive is used (mixing ratio error ≤±2%), with an application amount of 400-600g/m². The substrate is treated to Sa2.5 grade, with a curing temperature of 15-30℃. Qinglong Group has developed dedicated pressing fixtures to ensure uniform bonding. In urban renewal projects, the bonding method offers fast construction speed and minimal impact on existing structures.

Mechanical Connection System and Thermal Bridge Control

Stainless steel anchors (Grade A4-80) paired with nylon thermal insulation sleeves achieve a thermal bridge coefficient ψ≤0.02W/(m·K). We optimize anchor placement through finite element analysis to avoid stress concentration. In coastal typhoon zones, mechanical connection offers higher reliability.

Cast Forming and Factory Precasting

Slots in the insulation panels are embedded with UHPC ribs to achieve mechanical interlocking. Qinglong Group has introduced continuous production lines, achieving composite panel flatness ≤2mm/2m. Factory precasting ensures stable quality, with on-site installation efficiency improved by 50%.

System Selection and Economic Analysis

The bonding method is low in cost but limited in applicable height; mechanical connection offers strong adaptability; cast forming delivers the best quality. We provide customized solutions for each project to achieve optimal technical and economic performance.