Influence of Nano-SiO₂ on the Consistency, Setting Time, Early-Age Strength, and Shrinkage of Composite Cement Pastes

Table 1

Chemical compositions and properties of cementitious materials.

Items	OPC	FA	SF	NS
SiO2 (%)	23.4	59.5	98.0	99.9
Al2O3 (%)	5.1	28.1
CaO (%)	60.3	1.6
MgO (%)	1.5	0.4
Fe2O3 (%)	4.4	5.7
SO3 (%)	2.5	0.3
LOI (%)	2.6	2.1	1.1	0.1
Specific gravity (g/cm^3)	3.17	2.73
Avg. particle size	16 μm	12 μm	0.1 μm	30 ± 10 nm