THE REAL TIME EXPERIMENTAL RESEARCH ON ROCK''''S SEM UNDER HIGH TEMPERATURE
高温下岩石SEM实时实验研究

Using the high temperature fatigue testing system with scanning electron microscope, we observed the influence of temperature's change on limestone's microstructure in real time, effectively avoided the influence of the reversible process of rock's heat inflating, which is influenced by the history of temperature and the influence of the difference of its properties during heating and after cooling. And it was also found that the samples have not created hot cracks in the heating process, but have created lot of tiny cracks in the cooling process. The experimental results indicate that the rock's microstructure changes at heating process and cooling process are different. This may due to the residual stress produced in the cooling process of limestone.