Effect of Wetting and Drying Cycle on the Behavior of Teff Straw Ash-Stabilized Expansive Soil

Table 4

Chemical properties of teff straw ash.

Oxide	Value (%)
Silica (SiO2)	47.20
Alumina (Al2O3)	4.10
Iron oxide (F2O3)	0.82
Calcium oxide (CaO)	8.46
Magnesium oxide (MgO)	2.46
Sodium oxide (Na2O)	<0.01
Potassium oxide (k2O)	18.04
Manganese oxide (MnO)	0.08
Phosphorpentoxide (P2O5)	3.11
Titanium oxide (TiO2)	0.01
Loss on ignition (LOI)	12.46