1. Infrastructure Engineering, Division of Highway and Railway Engineering, School of Architecture and the Built Environment, Royal Institute of Technology (KTH), SE-100 44 Stockholm, Sweden (Corresponding author), e-mail: biruk.hailesilassie@abe.kth.se
2. Associate Professor, Royal Institute of Technology (KTH), SE-100 44 Stockholm, Sweden
3. Adjunct Research Professor, Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel By Drive, Ottawa K1S 5B6, Canada
4. Director, Road Engineering/Sealing Components, EMPA, Swiss Federal Laboratories for Material Science and Technology, CH-8600 Duebendorf, Ueberlandstrasse 129, Switzerland, e-mail: manfred.partl@empa.ch