Table 1.

Physical and chemical properties of cementitious materials.

Oxide Composition (%)	Ordinary Portland Cement	Silica Fume (S)	Ultrafine (C)
SiO2	20.2	93.2	99.5
Al2O3	5.49	0.2	0.20
Fe2O3	4.12	0.03	0.03
CaO	65.43	0.72	0.01
MgO	0.71	0.14	-
Na2Oeq	0.26	0.07	-
SO3	2.61	<0.01	-
Loss on ignition (%)	1.38	5.4	-
Specific gravity	3.14	2.27	-
Fineness (m2/kg)	373	19,000	16,500