Study on Cooling Effect and Pavement Performance of Thermal-Resistant Asphalt Mixture

Table 2

Major performance indexes of FB used in the test.

Technical index	Unit	Floating beads	Fly ash
Refractory temperature	°C	1500	1400
True density	g/cm^3	0.721	1.95
Specific surface area	cm^2/g	2516	3120
SiO2 content	%	55–59	1.3–65
Particle-size distribution	μm	0–600	0–300
Thermal conductivity	W/(m·K)	0.058	0.110