Figure 19. Typical measurements (100% natural, σ3 = 73 kPa)

Figure 18. Effect of specimen size on resilient modulus

Figure 21. Mohr circles for 25% natural materials (300-mm-diameter samples)

TR-01-14
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a. Axial stress

b. Displacement.

Figure 19. Typical measurements (100% natural, σ3 = 73 kPa).

to shift upward on the same curve as the 36 kPa, unlike

Table 12. Shear strength material properties from

the distinct difference seen with the 150-mm-diameter

large-scale tests (300-mm φ).

sample results (Fig. 22).

The effect of void ratio and percentage of crushed

material in the aggregate mixture on the mixture's shear

strength is presented in Table 14 and Figure 23. For the

300-mm samples, shear strength decreases rapidly with

increasing void ratio. A similar but less rapid response

than that seen with the 300-mm-diameter samples is

seen with the 150-mm samples when the confining pres-

sure is 70 kPa. At the lower confining pressure of 36

kPa, shear strength is unaffected by the void ratio (Fig.

23). As with the maximum shear stress, the correlation

between the percent crushed aggregate and shear strength

is poor (Fig. 23).

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