Strength Characteristics and Slope Stability of Expansive Soil from Pingdingshan, China

Table 1

Pingdingshan expansive soil chemical composition and content.

Constituent	Content (%)
SiO2	53.26
CaO	11.02
Al2O3	3.46
MgO	0.416
P2O5	0.166
Fe2O3	20.37
CuO	1.275
K2O	0.840
TiO2	0.216
SO3	0.131
MnO	0.0979
ZnO	0.0575
SrO	0.005
Tb4O7	0.002
Compton	0.866
Na2O	0.059
PbO	0.0403
ZrO2	0.004
Rayleigh	74.5