Improving the Interfacial Bond Properties of the Carbon Fiber Coated with a Nano-SiO₂ Particle in a Cement Paste Matrix

Table 1

Physical and chemical properties of cement and silica fume.

Materials	OPC	Silica fume
Specific gravity	3.13	2.2
Surface area (cm^2/g)	3,870	200,000
SiO2 (%)	21.47	97.38
Al2O3 (%)	6.21	—
Fe2O3 (%)	3.70	—
CaO (%)	59.24	—
MgO (%)	2.08	—
Na2O (%)	0.13	0.11
K2O (%)	1.08	0.31
SO3 (%)	2.48	—
Loss on ignition (%)	2.87	0.67
F-CaO (%)	0.57	—
H2O (%)	—	0.57