Synergetic Effect of Nano-ZnO and Trinidad Lake Asphalt for Antiaging Properties of SBS-Modified Asphalt

Table 4

Calculation results of asphalt colloid instability index.

Aging state	SBS asphalt		3% Z + 25% T + SBS asphalt
	Ic	Ic increment	Ic	Ic increment
Before aging	0.346	—	0.340	—
RTFOT	0.385	0.039	0.350	0.009
PAV	0.534	0.188	0.446	0.096
UV	0.524	0.178	0.456	0.115