Experimental Analysis on Flexural-tensile Performance of Polyester Fiber Asphalt Concrete

Abstract

Taking the AC-13F mixture as the matrix, this paper carries out beam bending tests on fiber asphalt concrete, using the optimal asphalt content (OAC) determined by Marshall test. The test parameters include temperature, fiber volume ratio and fiber aspect ratio. Based on the test results, the author systematically explored how the three parameters affect the flexural performance of asphalt concrete. In addition, the fiber content feature parameter (FCFP) was introduced to describe the combined effect of fiber volume ratio and fiber aspect ratio on the flexural performance of asphalt concrete, and an FCFP-based model was set up to calculate the flexural performance of polyester fiber reinforced concrete beams at different temperatures. The results show that the flexural-tensile strength of fiber asphalt concrete increases first and then decreases with the rising temperature; the failure strain of fiber asphalt concrete increases with temperature; under different temperatures, the flexural-tensile strength of polyester fiber asphalt concrete increases first and then decreases with the growth in fiber volume ratio or fiber aspect ratio; the optimal FCFP of polyester fibers is 1.13. The research findings shed important new light on flexural-tensile performance of polyester fiber asphalt concrete.

Laboratory Investigation on Pavement Performance of Basalt Fiber-Reinforced Asphalt Mixture Under the Coupling Effect of Freeze-Thaw Cycles and Aging

“…Fibrous materials, such as polyester fiber and mineral fiber, are generally added to enhance the working properties of asphalt. Wu et al explained that when polyester fiber is added to asphalt mixture, it is found that the flexural tensile strength of the asphalt mixture increases by 86.6% under the condition of optimal fiber content (0.4% by mass of asphalt mixture) (Chen F et al, 2019;Wu, J. et al, 2020). Mohammed et al added an appropriate amount of mineral fibers to the asphalt mixture to enhance its mechanical properties.…”

Effects of Fiber Diameter on Crack Resistance of Asphalt Mixtures Reinforced by Basalt Fibers Based on Digital Image Correlation Technology

“…Pei et al [ 16 ] pointed out that the addition of steel fiber improved the flexural tensile strength and anti-deformation ability of asphalt mixtures. Chen et al [ 17 ] proposed that polyester fibers could enhance the bending and tensile properties of mixtures. Wu et al [ 18 ] focused on the experimental research on the performance of basalt fiber-modified asphalt mixture.…”