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

Table 8

Three-stage models for control and rubberized asphalt mixtures at 400 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	= 4088N^0.2949	469	25074.93	25185.27	= 25074.93 + 15.1()	15.1	a	a	a	a
	TB	= 3889.3N^0.2845	979	27589.84	28045.16	= 28029.93 + 6.995()	6.995	a	a	a	a
	CB	= 3740.9N^0.2823	1035	26551.79	26216.27	= 26138.10 + 7.977()	7.977	a	a	a	a
50°C	Control	= 5146.9N^0.307	169	24860.33	25046.38	= 24860.33 + 39.439()	39.439	829	50890.07	51849.49	= 50890.1 + 2789.6()
	TB	= 6176.7N^0.2523	369	27442.09	27549.52	= 27442.09 + 17.677()	17.677	a	a	a	a
	CB	= 4100.3N^0.2983	599	27626.26	27859.29	= 27626.26 + 14.184()	14.184	a	a	a	a
60°C	Control	= 5014.9N^0.3525	60	21235.41	21252.78	= 21235.41 + 135.17()	135.17	206	40970.23	41464.50	= 40970.2 + 2401.6()
	TB	= 4351.6N^0.3484	65	18632.36	18767.02	= 18632.36 + 117.42()	117.42	245	39767.96	40711.57	= 39768.0 + 1333.2()
	CB	= 3909.8N^0.3461	74	17341.86	17532.57	= 17341.86 + 93.494()	93.494	353	43426.686	44529.37	= 43426.7 + 2097.8()

Not found at the end of 1800 cycles.