Hydro-Mechanical Properties of an Unsaturated Frictional Material

6.2. SOIL-WATER CHARACTERISTIC CURVE 127
Cumulative volume of water (ml)
3000
2500
2000
1500
1000
500
0
Loose specimen
0 1000 2000 3000 4000 5000 6000
Time (min)
Dense specimen
Figure 6.11: Measurements of cumulative water outflow from transient state column test II
(loose and dense specimens)
dense specimen. Independent from the experimental procedure (specimen were drained and
wetted with a flow rate of 30 ml/min as well as 100 ml/min and a suction of 3.5 kPa was
Volumetric water content (%)
Saturation (-)
50
40
30
20
10
0
1.0
0.8
0.6
0.4
0.2
0.0
Volumetric water content (%)
0.1 1 10
Matric suction (kPa)
Saturation (-)
Loose specimen
0.1 1 10
Matric suction (kPa)
50
40
30
20
10
0
1.0
0.8
0.6
0.4
0.2
0.0
0.1 1 10
Matric suction (kPa)
- top TDR - middle TDR - bottom TDR
0.1 1 10 specimen Initial void ratio = 0.66 Dense
Matric suction (kPa)
Initial void ratio = 0.89
Figure 6.12: Readings from tensiometers and TDR sensors linked to drainage soil-water characteristic
curves from transient state column test II (loose specimen)