Utilization of Coffee Husk Ash on the Geotechnical Properties of Gypsum-Stabilized Expansive Clayey Soil

Table 1

Chemical compositions of CHA [30].

Oxide	SiO2	Al2O3	Fe2O3	CaO	MgO	Na2O	K2O	MnO	TiO2	P2O5	SO3	LOI
Value (%)	1.24	0.58	0.56	17.70	4.51	0.14	46.46	0.06	0.08	3.85	3.75	21.07