Abstract
Creep experiments are of paramount importance for assessing the long-term stability of rock engineering structures. The major issue in creep tests is how to keep sustained loading constant on samples and to monitor displacement and other parameters throughout experiments without any interruption for long durations. Available cantilever type creep devices capable of carrying out various creep tests have been recently improved and used in this study. In addition, an impression creep device capable of applying a tip pressure up to 134 MPa for an indenter of 3 mm in diameter has been used with a purpose as an index creep testing technique. All devices are equipped with displacement transducers and acoustic emission sensors, which operate independently from conventional electrical power supply. The new monitoring system used in these creep devices is described and its utilization for evaluating creep responses of rock salt samples from Çankırı Province of Turkey are presented and discussed.
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