01662661

Component

Fatigue cracking and permanent deformation (rutting) are major distresses that occur in flexible pavements. Four-point bending beam as well as flow number laboratory tests have been used for several decades to evaluate the long-term fatigue and rutting resistance for asphalt mixture, respectively. One of the most significant solutions to prolong the fatigue life as well as rutting resistance for an asphaltic mixture is to utilize flexible materials such as fibers. A laboratory testing program was performed on a conventional and fiber-reinforced mixtures to investigate the impact of added fibers on the mechanical, mechanistic, and economical attributes of asphaltic mixtures. Strain controlled fatigue tests were conducted according to American Association of State Highway and Transportation Officials (AASHTO) procedures. The results from the beam fatigue tests indicated that the fiber-reinforced mixtures would have much longer fatigue and rutting resistance life compared with the reference (conventional) mixtures. Additionally, a mechanistic analysis using 3D-Move software coupled with a cost-effectiveness analysis study based on the fatigue and rutting resistance performance of the two mixtures was performed. Overall, analysis showed that fiber-reinforced asphalt mixtures exhibited significantly lower cost of pavement per 1000 cycles of fatigue and rutting life per mile compared to conventional hot mix asphalt (HMA) mixture.

This paper was sponsored by TRB committee AFK30 Standing Committee on Non-Binder Components of Asphalt Mixtures.

18-00171

English

21p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References; Tables

Asphalt mixtures; Cost effectiveness; Fatigue cracking; Fatigue tests; Rutting

3D-Move (Computer model)

Fatigue life; Fiber reinforced asphalt concrete; Fiber reinforcement; Rut resistance

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2018 Paper #18-00171

TRIS, TRB, ATRI

Jan 8 2018 10:04AM