Evaluation of moisture migration characteristics of permeable asphalt pavement: Field research. (15th March 2023)

• Record Type: Journal Article
• Authors: Lu, Rong; Jiang, Wei; Xiao, Jingjing; Yuan, Dongdong; Li, Yupeng; Hou, Yukai; Liu, Congcong
• Is Part Of: Journal of environmental management. Volume 330(2023)
• Publication Date: 2023-03-15
• Subjects: Permeable asphalt pavement -- Rainfall -- Moisture migration -- Prediction mode -- Infiltration -- Rainfall intensity; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2022.117176
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: To analyse the moisture migration characteristics of permeable asphalt pavement (PAP) in engineering applications, a PAP sample with a length and width of 163 m and 12 m, respectively, was designed and paved. The pavement comprised PAC-13, PAC-20, ATPB-25, graded grade, and sandy soil subgrade from the top to the bottom. Moisture sensors were set at 4 cm, 10 cm, 28 cm, 46 cm, 61 cm, 76 cm, 101 cm, 126 cm, 176 cm, and 226 cm below the pavement surface to ascertain the volumetric water content during and after rainfall. This data were used to analyse the changes in the infiltration depth, infiltration rate, water level height, and water emptying time of the PAP under different rainfall conditions. The results show that the prediction model for the infiltration depth can be established using the water adhesion rate and rainfall. According to the moisture changes of the pavement layer after rainfall, the water migration process of the PAP can be divided into the drying stage, wetting stage, emptying stage, and recovery drying stage. The relationship between the average rainfall intensity and the average infiltration rate is a linear function. The water emptying time at the depth of 0–10 cm is less than 20 h, and the emptying time at a depth below 10 cm is less than 6 d. Highlights: The moisture migration of PAP affect the discharge of surface runoff. Infiltration depth, infiltration rate, water level height, and water emptying time after rainfall of PAP are studied. Average rainfall intensity and average infiltration rate is a linear relationship. The water emptying time at the depth of 0–10 cm is less than 20 h.