Abstract
Sand mastics are often used as impermeable materials for a waste repository. For the evaluation of the quality, compression and bending tests are carried out under a particular temperature and sheering-speed. However, in a previous study, it has been revealed that the strength characteristic of sand mastics is considerably dependent on the temperature or sheering-speed. In this study, triaxial compression tests for sand mastics were conducted in order to evaluate the strengths under various temperature or shearing-speed. From the test results, the internal friction angle was evaluated as almost zero. In addition, it was indicated that the cohesion became small with the increase of temperature or the decrease of shearing-speed. Namely, it is essential for the design to determine the strength of sand mastics according to the environmental conditions.
