600
500
100% Natural
400
300
73 kPa
200
33 kPa
100
0
0
100
200
300
400
500
600
700
800
σ (kPa)
Figure 20. Mohr circles for 100% natural materials (300-mm-diameter samples).
700
75% Crushed
600
500
400
69 kPa
300
200
37 kPa
100
0
0
100
200
300
400
500
600
700
800
900
σ (kPa)
Figure 21. Mohr circles for 25% natural materials (300-mm-diameter samples).
700
600
25
100
500
-1.4145
y = 17.763x
2
R = 0.90
-0.7268
75
y = 93.612x
400
R2 = 0.91
50
0
50
300
50
0
75
25
0
25
100
75%
50
200
25
0
300-mm, Sigma 3 = 36 kPa
75%
0
300-mm, Sigma 3 = 71 kPa
50
100
150-mm, Sigma 3 = 36 kPa
150-mm, Sigma 3 = 70 kPa
100
0
0.00
0.05
0.10
0.15
0.20
0.25
0.30
Void Ratio
Figure 22. Influence of void ratio on maximum shear stress.
17
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