Evaluating the influence of fiber reinforces on the durability of asphalt mixture using for pavement coating

Abstract

Asphalt mixture is widely regarded as the most effective composite material for road pavement due to its many advantages. Under severe conditions such as those experienced in Vietnam-characterized by heavy traffic, high temperatures, and rain-induced erosion- asphalt pavement can be prone to fractures and fatigue damage. Over time, the degree of damage increases, which significantly shortens the lifespan of road surfaces. This paper seeks to assess the effect of fiber reinforcement on the mechanical properties and durability of asphalt mixtures. The Marshall method was utilized for sample compaction and mix design, while the Semi-Circular Bending (SCB) test was employed to evaluate cracking resistance and durability of the mixtures. Experimental results demonstrate that the inclusion of fiber enhances the mechanical properties of asphalt mixtures, with an optimal fiber content determined to be 0.1%. The SCB test findings further confirm that fiber reinforcement improves the cracking resistance of the asphalt mix.

Keywords: Asphalt mixtures; SMA; Forta-fi fiber; Marshall; SCB test; cracking resistance.