Establishment of Rutting Model of Wheel-Tracking Test for Real-Time Prediction of Rut Depth of Asphalt Layers

Table 2

Properties of asphalt for SUP-20.

Item				Tested result	Requirement	Test method
Original asphalt	—	135°C	Kinematical viscosity (Pa s)	2.500	≤3	AASHTO T 316 [26]
	DSR	76°C	G (kPa)	1.52	G·sinδ ≥1.0	AASHTO T 315 [27]
			δ	69.2
			G·sinδ (kPa)	1.63
	DSR	82°C	G (kPa)	0.869
			δ	67.7
			G·sinδ (kPa)	0.939
RTFOT	DSR	76°C	G (kPa)	2.58	G·sinδ ≥2.2	AASHTO T 240 [28]
			δ	66.2
			G·sinδ	2.82		AASHTO T 315 [27]
	DSR	82°C	G (kPa)	1.52
			δ	68.2
			G·sinδ (kPa)	1.64
PAV	BBR	−12°C	S (MPa)	145	S ≤300	AASHTO R 28 [29]
			m		m ≥0.300
		−18°C	S (MPa)	268		AASHTO T 313 [30]
			m	0.284
	DSR	31°C	G (kPa)	1010	G·sinδ ≤5000
						AASHTO R 28 [29]
			δ	64.4
			G·sinδ (kPa)	910.9		AASHTO T 315 [27]

Note. RTFOT: Rolling Thin-Film Oven Test. PAV: Pressurized Aging Vessel. DSR: Dynamic Shear Rheometer. BBR: Bending Beam Rheometer. G denotes the complex shear modulus. δ denotes the phase angle.