Investigation of the Mechanical and Permeability Evolution Effects of High-Temperature Granite Exposed to a Rapid Cooling Shock with Liquid Nitrogen

Table 1

Average of physical and mechanical parameters of granite specimens under different thermal shock conditions.

	Heating temperature (°C)	Diameter (mm)	Height (mm)	Weight (g)	Density (kg/m^3)	P-wave velocity (m/s)	Strength (MPa)
Before	25	49.15	100.72	501.4	2.63	3472	/
After		49.15	100.72	501.4	2.63	3472	185.26
Before	200	49.24	99.97	501.2	2.63	3458	/
After		49.26	100.05	500.8	2.63	3226	166.75
Before	400	49.41	100.32	503.8	2.62	3442	/
After		49.41	100.34	503.3	2.62	2688	156.48
Before	600	49.35	99.76	509.3	2.67	3460	/
After		49.85	100.34	508.3	2.60	1621	151.86
Before	800	49.24	100.32	501.8	2.63	3481	/
After		51.42	103.92	500.8	2.32	823	80.29