Effect of Rubberized Bitumen Blending Methods on Permanent Deformation of SMA Rubberized Asphalt Mixtures

Table 7

Three-stage models for control and rubberized asphalt mixtures at 200 kPa.

Temperature (°C)	Asphalt mixture specimen	Primary stage				Secondary stage					Tertiary stage
		Model	End point	Predicted strain, µs	Measured strain, µs	Model	Slope	End point (FN)	Predicted strain, µs	Measured strain, µs	Model
40°C	Control	= 2979.3N^0.2628	1173	19086.48	19100.08	= 19086.48 + 4.422()	4.422	a	a	a	a
	TB	= 2712.8N^0.2343	1063	13884.64	13708.17	= 13884.64 + 2.173()	2.173	a	a	a	a
	CB	= 2331.3N^0.2486	865	12523.92	12222.56	= 12523.92 + 2.235()	2.235	a	a	a	a
50°C	Control	= 2513.8N^0.3004	479	16051.05	16116.79	= 16051.05 + 9.904()	9.904	a	a	a	a
	TB	= 2828.6N^0.2729	735	17130.95	17265.137	= 17130.95 + 5.733()	5.733	a	a	a	a
	CB	= 2505.7N^0.2737	701	15059.21	15183.12	= 15059.21 + 5.886()	5.886	a	a	a	a
60°C	Control	= 3033.3N^0.3769	179	21429.68	21786.87	= 21429.68 + 50.938()	50.938	745	50260.59	51394.74	= 50260.6 + 2159.8()
	TB	= 2479.8N^0.3449	109	12506.19	12573.35	= 12506.19 + 31.592()	31.592	813	34746.96	36121.42	= 34747.0 + 2749.6()
	CB	= 2582.3N^0.3321	281	16796.63	17038.48	= 16796.63 + 20.296()	20.296	1417	39852.89	40954.44	= 39852.9 + 1474.2()

Not found at the end of 1800 cycles.