VAA Virginia Asphalt Fall/Winter 2021

VAASPHALT.ORG 23 The combination of increased awareness of the need to generate less runoff by increasing infiltration of precipitation on-site, additional experience with PPSs, and the continual improvements in mix design and maintenance practices will almost certainly result in these sys- tems being used more frequently as a stormwater BMP. The bigger question is this: Can and will the use of PPSs expand beyond conser- vative applications such as parking lots, bike lanes and driveways to more heavily used pavements where resiliency is a concern because of flooding? As pavement engineers determine how to design pave- ments that will withstand saturated base conditions and stormwater engineers face the challenges of increased water volumes, how these uniquely designed pavement systems are viewed will need to change to address both of these resiliency obstacles. References 1. Virginia Department of Conservation and Recreation. Virginia DCR Stormwater Design Specification No. 7, Version 1.8. Richmond, 2011. 2. Wisconsin Department of Natural Resources. Conservation Practice Standard: Permeable Pavement (1008). Madison, 2016. 3. Gupta, A., Rodriguez-Hernandez, J. and Castro-Fresno, D. Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review. Materials, Vol. 12, 2019. 4. Tang, G., Gao, L., Ji, T. and Xie, J. Study on the Resistance of Raveling for Porous Asphalt Pavement. 2017 International Conference on Transportation Infrastructure and Materials. DEStech Transactions on Materials Science and Engineering, May 2017. 5. Radfar, A. and Rockaway, TD. Clogging Prediction of Permeable Pavement. Journal of Irrigation and Drainage Engineering , Vol. 142, 2016. 6. Winston, R.J., Al-Rubaei, A.M., Blecken, G.T., Viklander, M. and Hunt, W.F. Maintenance Measures for Preservation and Recovery of Permeable Pavement Surface Infiltration Rate: The Effects of Street Sweeping, Vacuum Cleaning, High Pressure Washing and Milling. Journal of Environmental Management , Vol. 169, 2016, pp. 132–144. PERMEABLE PAVEMENT △ continued from page 21