International Session 国際セッション (2)

[CS2-10] TIME EFFECTS ON STRENGTH AND DEFORMATION CHARACTERISTICS OF GYPSUM MIXED CLAY

*Shaikh Masum¹、Koseki Junichi ²、Kyokawa Hiroyuki³、Maqsood Zain ⁴ (1. Master's Student, Department of Civil Engineering, The University of Tokyo、2. Professor, Department of Civil Engineering, The University of Tokyo、3. Assistant Professor, Department of Civil Engineering, The University of Tokyo、4. Doctoral Student, Department of Civil Engineering, The University of Tokyo)

Keywords:Gypsum Mixed Clay (GMC) , Ageing effects, Loading rate effects, Failure strength, Shear band

To explore the loading rate dependency of the Gypsum Mixed Clay (GMC), a series of uniaxial monotonic loading tests were conducted at several strain rates. Significant effects of the strain rates on the failure strength and stiffness of the specimens were observed in the present study. In addition, to investigate the curing time/ageing effects on the failure strength, uniaxial monotonic loading tests were conducted on the GMC specimens with different curing periods. A significant reduction of failure strength was witnessed between the first 14 days of curing time, but the effects of ageing were found to be insignificant after 14 days.