How Much Better Is the Thermal Insulation of UHPC Panels Than Ordinary Concrete Panels? — A Comparative Analysis of Thermal Insulation Performance

The thermal insulation performance of UHPC panels is significantly superior to that of ordinary concrete, with a thermal conductivity typically ranging from 0.8-1.2W/(m·K), 30%-40% lower than ordinary concrete (1.5-2.0W/(m·K)). Test data from Qinglong Group shows that a 20mm thick UHPC panel provides insulation equivalent to a 30mm thick ordinary concrete panel. This advantage stems from its dense microstructure and low thermal conductivity components.

Material density is key to insulation. UHPC has a porosity of only 2%-5%, far lower than the 10%-15% of ordinary concrete, reducing heat transfer through air convection. Qinglong Group incorporates hollow glass microspheres (thermal conductivity of 0.05W/(m·K)) into the mix design, further reducing the thermal conductivity to 0.6W/(m·K). In energy-efficient buildings, this performance can reduce air conditioning loads by more than 20%.

The practical application results are remarkable. In a project in Shenzhen, UHPC curtain walls reduced indoor temperature differences by 3-5℃. Surface temperature monitoring shows that during high summer temperatures, the surface temperature of UHPC panels is 8-10℃ lower than that of ordinary concrete, effectively reducing thermal bridge effects. This insulation advantage is particularly significant in high-temperature regions.