Brittleness Evaluation of Shale Based on the Brazilian Splitting Test

Table 2

Brittleness indexes with large dispersion degree.

Sample number				Standard deviation
B-1	0.62	0.80	0.11	0.3579
B-6	0.51	0.76	0.15	0.3066
B-10	0.67	0.27	0.18	0.2608
B-12	0.19	0.70	0.88	0.3579
C-1	0.16	0.02	0.74	0.3817
C-2	0.54	0.96	0.10	0.4300
D-2	0.50	1.00	0.17	0.4178
D-3	0.35	0.70	0.08	0.3108