It is important to consider the influence of temperature when evaluating the frictional behavior of a single rock joint since it may change due to the geochemical processes occurring at the asperity contacts such as mineral dissolution. It is thought that the chemical processes may be accelerated under thermal conditions. In this study, the direct shear tests under a slide-hold-slide process, using artificial rock (mortar), granite and andesite with a single natural rough joint, have been performed at 20 and 60 °C. Through the experiments results, the shear strength healings can be evaluated. Moreover, the log-linear equation and the rateand state-dependent friction law are applied to the experimental results. In particular, the cutoff time of rate- and state-dependent friction law shows the response with the difference of the thermal conditions
展开▼
