Experimental study on longitudinal wave characteristics of tuff, granite and breccia after high temperature

Experimental study was performed on the longitudinal wave characteristics of tuff,granite and breccia under different high temperatures.The longitudinal wave velocity,density,Young’s modulus and peak stress of rocks were analyzed.Furthermore,relationship between longitudinal wave velocity and density,Young’s modulus and peak stress were studied.It was shown that the velocity of longitudinal wave,density,Yong’s modulus and peak stress decreases with temperature.The longitudinal wave velocity decreased more than density.However,the relationship among longitudinal wave velocity,Young’s modulus and peak stress presented different variation according to the type of rock.