Research on mechanical characteristics and micropore structure of granite under high-temperature

Mechanical characteristics and micropore structure of granite under high-temperature (from normal to 1 300 ℃) have been researched with hydraulic servo system MTS 815 and micropore structure analyzer 9310. The results are as follows:① Mechanical characteristics do not show obvious variations below 800 ℃; strength decreases suddenly above 800 ℃ and bearing capacity is almost lost at 1 200 ℃. ② Rock porosity increases with rising temperatures; the...