Influence of meteorological factors on evaporative cooling of steel slag permeable concrete pavement

Permeable pavement can decrease the pavement temperature through the evaporative cooling effect of water on the surface. It is necessary to understand the evaporative cooling effect of permeable pavement in the actual service environment to alleviate the urban heat island effect. In this study, a large-scale outdoor simulated evaporation test was carried out to restore the service conditions of natural soil pavement (NSP), ordinary concrete pavement (OCP) and steel slag permeable concrete pavement (SPCP) in the outdoor normal environment. Additionally, the effects of different meteorological factors (i.e. temperature, wind speed, and relative humidity) on the evaporative cooling effect of pavement were analyzed. The results inidcate that the evaporation rates of the three pavements are basically the same. Among them, the evaporation rate of NSP is the largest, followed by SPCP, and the evaporation rate of OCP is the smallest. Temperature and relative humidity have the most obvious influence on the evaporation of NSP, and wind speed has the greatest influence on the evaporation of SPCP, the three meteorological factors jointly dominate the evaporation of OCP. The scientific value of this study is to provide guidance for the subsequent prediction and evaluation of the actual cooling effect of SPCP.