1. NTEC, University of Nottingham, Pavement Research Building, Nottingham NG7 2RD, UK (Corresponding author), e-mail: gordon.airey@nottingham.ac.uk, https://orcid.org/0000-0002-2891-2517
2. Abatech, PO Box 356, Blooming Glen, PA 18911, USA
3. Department of Civil and Environmental Engineering, University of New Hampshire, 33 Academic Way, Durham, NH 03824, USA, https://orcid.org/0000-0001-5284-0392 (J.E.S.), https://orcid.org/0000-0001-9788-2246 (E.V.D.)
4. University of Lyon/ENTPE, Rue Maurice Audin, Vaulx-en-Velin 69518, France