Laboratory Evaluation on Performance of Fiber-Modified Asphalt Mixtures Containing High Percentage of RAP

Table 9

Fatigue results of different asphalt mixtures.

Asphalt type	Stress ratio	σt (MPa)	lg σt	Nf (times)	lg Nf	Relationship equation	R^2
Matrix asphalt	0.5	0.0625	−1.20	17252	4.23	lg Nf = −3.02–6.04 lg σt	0.975
	0.6	0.0728	−1.12	7569	3.85
	0.7	0.0865	−1.05	2245	3.32
LF-modified asphalt	0.5	0.0852	−1.08	25625	4.42	lg Nf = 1.02–3.16 lg σt	0.958
	0.6	0.1025	−1.01	17522	4.23
	0.7	0.1167	−0.92	8568	3.95
PF-modified asphalt	0.5	0.1025	−0.99	32152	4.50	lg Nf = 3.02–1.53 lg σt	0.963
	0.6	0.1235	−0.90	26558	4.43
	0.7	0.1429	−0.83	19065	4.25
BF-modified asphalt	0.5	0.1178	−0.93	35442	4.55	lg Nf = 3.64–0.99 lg σt	0.978
	0.6	0.1420	−0.84	30982	4.49
	0.7	0.1650	−0.79	24968	4.40