State of the Art Study on Aging of Asphalt Mixtures and Use of Antioxidant Additives

Table 1

Factors affecting aging of asphalt mixture.

	Factors	Findings	References
Short-term aging	Binder chemistry	Major effect	Traxler [10]
	Binder type and source	Significant effect on field aging	Lund and Wilson [11, 12]
	Binder type and source	Significant effect on lab aging; reduced aging with polymer	Topal and Sengoz [13], Zhao et al. [14], Morian et al. [15]
	Asphalt binder film thickness	Significant effect	Kandhal and Chakraborty [16]
	Aggregate gradation	No effect	Chipperfield and Welch [17]
		Important effect	Morian et al. [15]
	Aggregate absorption	Major effect	Traxler [10]
		Important effect	Aschenbrener and Far [18], Morian et al. [15]
	Inclusion of recycled materials and reheating	Significant effect	Mogawer et al. [19]
	Plant type	Significant effect	Terrel and Holen [20], Chollar et al. [21]
	Production temperature and silo storage	Significant effect	Mogawer et al. [19], Daniel et al. [22]
Long-term aging	Aggregate source	No effect on lab aging	Morian et al. [15]
	Aggregate porosity	Significant effect	Kemp and Predoehl [23]
	Binder source	Significant effect	Morian et al. [15]
	Asphalt content	Significant effect	Kari [24]
		No effect	Rolt [25]
	Air voids	Significant effect	Kemp and Predoehl [23] Harrigan [26], Houston et al. [27]
		No effect	Rolt [25]
	Pavement permeability	Significant effect	Kari [24]
	Pavement depth	Field aging not limited to the top 25 mm of the pavement; field aging gradient observed	Farrar et al. [28]
		Aging decreases over depth	Sirin et al. [29]
		10-year field aging can result in deterioration to the 2nd layer	Wu et al. [30]
	In-service temperature	Significant effect	Kemp and Predoehl [23], Rolt [25], Epps Martin et al. [31], Sirin et al. [28]
	Exposure time	Significant effect	Rolt [25]
	Ultraviolet ray	Significant effect	Lee [32]