A New Statistical Parameter for Determining Joint Roughness Coefficient (JRC) considering the Shear Direction and Contribution of Different Protrusions

Table 3

Comparison of JRC values in different directions for 10 standard roughness joint profiles.

Number of joint profiles	JRC values		Absolute difference
	Direction 1	Direction 1
1	0.4	−0.44	0.84
2	2.8	2.45	0.35
3	5.8	4.13	1.67
4	6.7	10.88	4.18
5	9.5	5.96	3.54
6	10.8	11.42	0.62
7	12.8	10.58	2.22
8	14.5	13.84	0.66
9	16.7	15.33	1.37
10	18.7	18.71	0.01