Mechanical behaviour of unsaturated undisturbed black volcanic ash soil under static and cyclic loadingOkri Asfino Putra, Noriyuki Yasufuku, Ryohei Ishikura, Adel Alowaisy and Yuko KawaguchiE3S Web Conf., 92 (2019) 07004DOI: https://doi.org/10.1051/e3sconf/20199207004