The Performance of Low-Heat Accumulation Asphalt Mixture and the Evaluation Model of its Thermal Effect on Cities

Abstract:

A new type of low-heat accumulation asphalt concrete material has been made to reduce urban surface temperature and to ease the urban heat island effect. The test has investigated the temperature reduction performance and pavement performance, established a non-gray model of the atmospheric temperature field, and evaluated its effect on the urban thermal environment. The results show that compare specimens mixed with infrared powder with normal ones, the higher the infrared powder content, the lower the surface temperature, but the cooling rate decreases; the properties of high-temperature stability, low-temperature stability and water stability are improved; under the same temperature and humidity conditions, the surface layer temperature of the former pavement is lower generally; under the same radiation conditions, the surface equilibrium temperature of the former ones is 8.12K lower, which can reduce the near-earth atmospheric temperature and ease the urban heat island effect.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 1795-1804
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.1795
• Online since: July 2011
• Authors: Jian Guang Xie, Zhao Xu Yang, Xiao Qing Fang, Ye Hu
• Keywords: Asphalt Mixture (AC), Infrared Powder, Low-Heat Accumulation, Road Performance, Urban Thermal Environment

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