Vane shear strength of bio-improved sand reinforced with natural fibre Mohsin Usman Qureshi, Abdulsalam Al-Hilly, Ola Al-Zeidi, Ashwaq Al-Barrami and Ahed Al-Jabri E3S Web Conf., 92 (2019) 12004 Published online: 25 June 2019 DOI: 10.1051/e3sconf/20199212004