ABSTRACT
This research investigated the long-term degradation potential of the soft rock sampled from a real tunnel site through X-ray diffraction analysis (XRD), accelerated slaking test, and creep test. The minerals contained in the samples were analyzed by XRD, and expansive minerals and wearable minerals have been found. Further, an accelerated slaking test was conducted to discuss the possible slaking. Moreover, the creep test using triaxial test apparatus was conducted to check the strength reduction due to slaking. The experimental result indicates that some minerals have the property of degradation and sedimentation and are one of the factors that cause rocks to slake. Based on the acceleration slaking test, the sample can be separated to level 2, so the rock is not easy to slake. Creep property and significant strength loss of the rock were obtained for this rock trough creep tests.
