Abstract
It is important to consider the influence of temperature when evaluating the frictional behavior of a single rock joint since the behavior may change due to geochemical processes which occur at the asperity contacts, such as mineral dissolution. It is thought that such chemical processes may be accelerated under certain thermal conditions. In this study, direct shear tests under a slide-hold-slide process, using granite and mortar specimens with a single natural rough joint, are performed at temperatures of 20 and 60°C. Through the experimental results, the shear strength healing can be evaluated. Moreover, the log-linear equation and the rate- and state-dependent friction law are applied to the experimental results in order to examine the influence of temperature on the shear stress healing phenomena.
