Study on Notch Sensitivity of Fracture Properties of Concrete Containing Nano-SiO₂ Particles and Fly Ash

Table 1

Properties of cement and fly ash.

Composition (%)	Cement	Fly ash
Chemical compositions
SiO2	20.85	51.50
Al2O3	5.32	18.46
Fe2O3	2.69	6.71
CaO	62.97	8.58
MgO	3.66	3.93
Na2O	0.15	2.52
K2O	0.62	1.85
SO3	2.48	0.21
Physical properties
Specific gravity	3.11	2.16
Specific surface (cm^2/g)	3287	2470