Study on GMZ bentonite-sand mixture by undrained triaxial tests Wen-jing Sun, Chao Chen, Shi-qing Liu, De-an Sun, Xue-hai Liang, Yun-Zhi Tan and Behzad Fatahi E3S Web Conf., 9 (2016) 18006 Published online: 12 September 2016 DOI: 10.1051/e3sconf/20160918006