Temperature characteristics of permeable asphalt pavement: Field research

Permeable asphalt pavement (PAP) has many advantages such as reducing surface runoff and improving driving safety on rainy days; hence, it has attracted much attention from researchers. PAP is greatly affected by environmental factors due to its porous structure and the temperature characteristics are different from those of dense asphalt pavement (DAP). This study aims to understand the influences of environmental conditions on the patterns of temperature distribution in PAP and DAP. Weather station and temperature sensors were installed while paving PAP and DAP. Meteorological data and temperature data of each structural layer of PAP and DAP were collected during 2019-2021. The results demonstrate that temperatures in the depth range of 4 similar to 10 cm below the PAP surface were 1 similar to 6 & DEG;C higher than DAP on rainless days. The heat storage and dissipation efficiency of PAP within the depth range of 4 similar to 40 cm were better than that of DAP. The maximum influence depth of PAP that heavy rainfall can affect is 60 cm, the maximum cooling extent of PAP is 5 similar to 6 & DEG;C, and the minimum cooling duration of PAP is 10 h on rainy days. This study provides a reliable foundation for evaluating the extent of the environmental impacts of PAP.

Automated summary

This study aims to understand the influences of environmental conditions on the patterns of temperature distribution in permeable asphalt pavement (PAP) and dense asphalt pavement (DAP). The results demonstrate that temperatures in PAP were 1 to 6 degrees Celsius higher than DAP on rainless days. The heat storage and dissipation efficiency of PAP within a depth range of 4 to 40 cm were better than that of DAP.