1) Unconsolidated undrained (UU) triaxial test was conducted on clay specimen with

diameter and height of 37.5 mm and 76 mm respectively. The test results are shown in

Table 1. Plot the typical stress-strain relationships and determine the undrained peak

shear strength of the tested soil, taking into account the variation of changing sheared

areas during test. Additionally, determine the strain value at which the peak shear strength

be mobilized?

Table 1. Test results for soil tested in triaxial shear apparatus

Cell Pressure

(03) = 105 kPa

Axial Displacement (mm) Proving Ring Reading of Axial

Load (Div.)

0

0.25

0.51

0.76

1.02

1.27

1.5

2.5

3.5

4.6

5.6

6.6

7.6

8.9

10.2

11.4

12.7

Use the following to process the data:

• Proving Ring Constant = 0.00165 kN/div

•

Axial Strain, &₁ =

Axial Displacment

Specimen Height

Ao

(1-₁)

Specimen Area, A =

CORY

0

3.5

7.5

11

14

18

21

31

38

44

48

52

53

5.2

50

49

49