Experimental Study on Mechanical Property and Pore Distribution of Limestone Specimens after Heat Treatment under Different Heating Conditions

Table 1

Physical and mechanical parameters of limestone after heat treatment under different heating conditions.

T (°C)	ρ (g/cm^3)		(km/s)		UCS (MPa)		ε0 (×10^-2)		Ea (GPa)		E50 (GPa)		σci (MPa)		σci/UCS
	Me	St	Me	St	Me	St	Me	St	Me	St	Me	St	Me	St	Me	St
25	2.74	0.021	5.35	0.238	121.60	3.393	0.53	0.001	28.84	1.538	20.92	0.902	55.38	1.175	0.46	0.016
200-V	2.74	0.012	3.81	0.207	105.72	1.160	0.59	0.047	25.22	0.827	16.17	1.605	50.22	1.810	0.47	0.012
200-A	2.70	0.009	3.53	0.245	92.66	3.635	0.58	0.059	24.45	1.450	14.46	1.485	40.63	2.758	0.44	0.013
300-V	2.72	0.002	3.21	0.132	91.27	2.114	0.61	0.013	21.58	0.629	12.71	0.764	40.47	2.630	0.44	0.019
300-A	2.71	0.010	2.80	0.076	78.46	4.879	0.64	0.003	19.50	0.905	9.97	1.025	33.97	3.939	0.43	0.023
450-V	2.70	0.027	2.37	0.021	88.98	8.309	0.86	0.028	17.04	0.976	8.47	0.643	36.54	2.836	0.41	0.007
450-A	2.68	0.016	2.09	0.062	74.43	2.539	0.87	0.041	13.09	0.665	7.11	0.262	28.83	3.260	0.39	0.057
600-V	2.66	0.020	1.91	0.059	76.76	3.288	1.00	0.012	12.87	1.506	6.49	0.113	30.01	2.135	0.39	0.045
600-A	2.66	0.033	1.71	0.342	63.18	0.354	1.05	0.043	9.79	1.117	4.77	0.276	21.79	1.146	0.34	0.016
750-V	2.64	0.018	1.76	0.238	65.66	5.480	1.23	0.045	8.68	0.071	4.15	0.255	24.12	2.291	0.37	0.004
750-A	2.60	0.036	1.42	0.146	53.89	1.499	1.28	0.082	7.06	0.495	3.29	0.212	17.32	1.704	0.32	0.041
900-V	2.57	0.010	1.53	0.025	35.89	2.242	1.33	0.033	4.39	0.905	2.17	0.007	11.78	1.414	0.33	0.060
900-A	2.52	0.025	1.32	0.095	30.81	1.796	1.49	0.028	2.50	0.007	2.05	0.134	9.71	0.552	0.32	0.000

Note: Me and St indicate the mean value and standard deviation, respectively; “200-V” means 200°C under vacuum condition, and the others are the same.