Olive Stone Ash as Secondary Raw Material for Fired Clay Bricks

Table 2

Chemical composition of OSA and clay.

Oxide content (%)	SiO2	Al2O3	Fe2O3	CaO	MgO	MnO	K2O	TiO2	P2O5	SO3	ZnO	SrO	ZrO2	Cl	LOI
OSA	8.47	1.68	2.97	24.0	3.42	0.057	31.22	0.073	4.04	—	0.03	0148	—	0.074	23.8
Clay	54.4	12.4	4.58	8.76	2.46	0.03	3.37	0.60	0.11	0.68	0.03	0.027	0.033	—	12.5