ZHI Le-peng, XU Jin-yu, LIU Zhi-qun, et al. Research on ultrasonic characteristics and Brazilian splitting-tensile test of granite under post-high temperature[J]. 2012, 33(S1).
ZHI Le-peng, XU Jin-yu, LIU Zhi-qun, et al. Research on ultrasonic characteristics and Brazilian splitting-tensile test of granite under post-high temperature[J]. 2012, 33(S1).DOI:
Ultrasonic characteristics and splitting-tensile strength of granite after exposure at temperature ranging from 25 ℃ to 1 000 ℃ are studied using hydraulic servo system and ultrasonic detector SRM-5N. The results show that (1) the longitudinal wave velocity
waveform and splitting-tensile strength of the granite are closely related to temperature; (2) the longitudinal wave velocity and splitting-tensile strength of granite gradually decrease with the temperature increasing
when the granite is exposed at 1 000 ℃
the longitudinal wave velocity and splitting-tensile strength decrease by 90% and 65%
and the splitting-tensile strength is bound up with the longitudinal wave velocity; (3) with the temperature increasing
the waveform of granite turns from regular to disordered
from concentrated to scattered
especially at 800 ℃; (4) the thermal damage enlarges and the specimens become fragile after exposure at 1 000 ℃.