title: Time resolved analysis of water drainage in porous asphalt concrete using neutron radiography.
abstract: Porous asphalt as a road surface layer controls aquaplaning as rain water can drain through its highly porous structure. The process of water drainage through this permeable layer is studied using neutron radiography. Time-resolved water configuration and distribution within the porous structure are reported. It is shown that radiography depicts the process of liquid water transport within the complex geometry of porous asphalt, capturing water films, filled dead end pores and water islands.
authors.affiliation: Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Road Engineering/Sealing Components. Überlandstrasse 129, CH-8600 Dübendorf, Switzerland. lily.poulikakos@empa.ch
authors.forename: L D
authors.initials: LD
authors.lastname: Poulikakos
authors.forename: M
authors.initials: M
authors.lastname: Sedighi Gilani
authors.forename: D
authors.initials: D
authors.lastname: Derome
authors.forename: I
authors.initials: I
authors.lastname: Jerjen
authors.forename: P
authors.initials: P
authors.lastname: Vontobel
mesh_terms: D006838:Hydrocarbons / Q000737:chemistry*; D008422:Materials Testing / Q000379:methods*; D009502:Neutrons; D016062:Porosity; D011859:Radiography; D011874:Radiometry / Q000379:methods*; D014867:Water / Q000032:analysis* / Q000737:chemistry
chemical_list: D006838:Hydrocarbons; D014867:Water; C006647:asphalt