01506438

Component

This study presents an analytic approach for predicting the direct tensile bond strength of recycled plastic fiber-reinforced hot-mix asphalt (HMA) mixtures. The toughening effects of the recycled plastic fiber-reinforced HMA mixtures were characterized using the direct tensile loading test developed here. The direct tensile loading approach is based on a law that separates the composite stress of the mixture into the matrix and fiber stress components. A method for calculating the effective fiber volume fraction along the failure plane is proposed to estimate the interfacial bond strength along the failure plane. The average interfacial bond strength resulted in the value of τ = 0.12 N/mm². Comparing to the maximum tensile stress at the peak of 0.47 N/mm², the fiber's contribution to resisting the failure is approximately 25.5%. The interfacial bond strength could be predicted using this approach because of the composite mixture failure resulting from the failure of the fiber and matrix interfacial bond. The generality of the direct tensile loading approach was confirmed by the experimental data from the direct tensile tests and three-point bending beam tests.

This paper was sponsored by TRB committee AFK30 Characteristics of Nonasphalt Components of Asphalt Paving Mixtures.

01503729

14-1073

English

12p

2014

Transportation Research Board 93rd Annual Meeting

Digital/other

Figures; Photos; References; Tables

Bond strength (Materials); Fibers; Hot mix asphalt; Tension tests

Bending beam tests

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

Transportation Research Board Annual Meeting 2014 Paper #14-1073

TRIS, TRB, ATRI

Jan 27 2014 2:25PM