Effects of Corn Cob Ash as Partial Replacement of Cement for Stabilization of an Expansive Clay

Table 3

The oxide content of corn cob ash (CCA).

Oxide composition	Test result in (%)	ASTM (C618) requirement in (%)	Remark
SiO2	63.53	35 min	Satisfied
Al2O3	5.45
Fe2O3	2.91
CaO	1.71
MgO	0.63	5 max	Satisfied
SiO2 + Al2O3 + Fe2O3	71.89	70 min	Satisfied