Loading Rate Effect of Rock Material with the Direct Tensile and Three Brazilian Disc Tests

Table 3

Comparison of the indirect tensile strength and direct tensile strength under different loading methods.

Log(loading rate) (MPa/s)	(MPa)	(MPa)	(MPa)	(MPa)
−2.0	3.7890	6.012	5.8930	2.7170	0.630	0.6430	1.390
−1.5	3.9615	6.314	6.1035	2.8545	0.627	0.6491	1.387
−1.0	4.1340	6.616	6.3140	2.9920	0.625	0.6547	1.380
−0.5	4.3065	6.918	6.5245	3.1295	0.623	0.6601	1.376
0.0	4.4790	7.220	6.7350	3.2670	0.620	0.6650	1.370
0.5	4.6515	7.522	6.9455	3.4045	0.618	0.6697	1.366
1.0	4.8240	7.824	7.1560	3.5420	0.616	0.6741	1.360