How Do UHPC Exterior Walls Achieve Integrated Thermal Insulation? Composite Systems and Qinglong Group Energy-Saving Technology

UHPC exterior walls achieve integrated thermal insulation mainly through a "decoration-insulation-structure" three-in-one composite design. The core construction includes a UHPC facing layer (thickness 12-20mm), an insulation core layer (rock wool/polyurethane thickness 50-100mm), and a structural base layer (GRC or concrete panel), with an overall heat transfer coefficient K-value as low as 0.30-0.45W/(m²·K). In the Shenzhen Pingshan High-tech Zone Comprehensive Service Center project, Qinglong Group adopted an integrated design of thermal-break connectors (thermal conductivity ≤0.05W/(m·K)) and sealing systems (air tightness ≤0.1m³/(m·h)), reducing building energy consumption by 35% and shortening the construction period by 40%. Integrated systems represent the development direction of building energy conservation.

Material Selection and Performance Matching

Class A fire-rated rock wool (density ≥140kg/m³) is preferred as the insulation material, with thickness optimized through CAD simulation. The difference in thermal expansion coefficients between the UHPC facing layer and the insulation layer is controlled within 1.5×10⁻⁶/℃ to avoid thermal stress. In the renovation of the Wuhan Hanxiu Theater, we used vacuum insulation panels (thermal conductivity ≤0.008W/(m·K)) to achieve high-efficiency insulation within a limited thickness.

Connection System and Thermal Bridge Treatment

Patented stainless steel thermal-break anchors (nylon sleeve thermal conductivity ≤0.05W/(m·K)) penetrate the insulation layer for fixing, with a thermal bridge impact coefficient ψ≤0.01W/(m·K). Panel joints adopt elastic sealant (displacement capacity ≥25%) + backing rod construction to ensure air tightness. In projects in severe cold northern regions, the system passed -30℃ freeze-thaw testing without anomalies.

Production Process and Quality Control

Continuous production lines are used to achieve composite forming (flatness ≤2mm/2m). Insulation material joints are staggered from UHPC panel joints to avoid cold bridges. Qinglong Group conducts 100% inspection with infrared thermal imagers to ensure no thermal defects. Integrated panels unify building energy conservation with aesthetics.

Installation Efficiency and Comprehensive Benefits

Dry construction allows a daily installation volume of 300-500 square meters. In the Nanning Green Building Demonstration project, the integrated system helped the project obtain LEED Gold certification. Life-cycle costs are reduced by more than 25%.