1. Research Affiliate, Dept. of Engineering, Univ. of Cambridge, Trumpington St., Cambridge CB2 1PZ, UK (corresponding author). ORCID: .
2. Chief Manager, Construction Products Development Division, Nippon Steel Corporation, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 100-8071, Japan.
3. Professor of Civil Engineering, Dept. of Engineering, Univ. of Cambridge, Trumpington St., Cambridge CB2 1PZ, UK.
4. Geotechnical Engineer, Rendel, 200 Great Dover St., London SE1 4YB, UK. ORCID: .
5. Professor of Civil Engineering, Dept. of Engineering, Univ. of Cambridge, Trumpington St., Cambridge CB2 1PZ, UK. ORCID: .