Table 2.

Chemical compositions of cement, SF, and RHA.

Chemical Composition (%)	Cement	SF	RHA
SiO2	22.52	94	82.9
Al2O3	5.80	0.21	0.29
Fe2O3	3.52	0.09	1.83
SO3	2.54	-	1.34
CaO	62.08	0.12	2.29
MgO	1.55	0.33	0.93
Na2O	0.05	-	0.06
K2O	0.56	0.38	6.82
L.O.I.	0.94	1.2	1.5

Note: L.O.I.: Loss on ignition.