Microscopic Evolution of Pore Characteristics and Particle Orientation of Granite Residual Soil in One-Dimensional Compression
Table 1
Average index features of GRS.
Index
Value
Sampling conditions
Sampling depth (m)
17.5–18.5
Underground water table below ground (m)
1.5
Overburden effective stress (kPa)
200
Physical indices
Density (g/cm3)
1.81
Water content (%)
36.1
Liquid limit (%)
52.1
Plastic limit (%)
24.2
Plasticity index
27.9
Hydraulic conductivity (10−7 m/s)
8.1
Shear strength parameters
Unconfined compressive strength (kPa)
156
Effective cohesion by CIU (kPa)
20.5
Effective friction angle by CIU (°)
39.4
Mineralogy
Quartz (%)
34.5
Feldspar (%)
3.2
Sericite (%)
4.2
Kaolinite (%)
48.5
Hematite (%)
3.6
This value is measured by the unconfined compression strength test following the ASTM standard ASTM D2166 [28]; This value is measured by the isotropically consolidated undrained triaxial shear test following the ASTM standard ASTM D4767 [29].
