Evaluation of different modulus input on the mechanical responses of asphalt pavement based on field measurements

Qian, Guoping; Shi, Changyun; Yu, Huanan; Ding, Yao; Zhu, Xuan; Li, Xi

doi:10.1016/j.conbuildmat.2021.125299

Cited by 8 publications

(1 citation statement)

References 31 publications

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“…This observed effect coincides with previous studies that have researched the addition of different types of synthetic fibers in asphalt mixtures [64][65][66]. The aforementioned is relevant for asphalt mixtures since a higher stiffness can translate into a higher structural capacity of the pavement [67].…”

Section: Results Of Hma Mixturessupporting

confidence: 90%

Enhancing Fatigue Resistance in Asphalt Mixtures with a Novel Additive Derived from Recycled Polymeric Fibers from End-of-Life Tyres (ELTs)

Valdes-Vidal,

Calabi-Floody,

Mignolet-Garrido

et al. 2024

Polymers

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Waste-tire textile fibers (WTTF) represent a challenge for the recycling industry since there are currently very few alternatives for their use. In this study, an evaluation of the effect of a new additive developed in two granular formats from WTTF on the fatigue behavior of asphalt mixtures was performed. For the first format of the WTTF-based additive, its effect was evaluated on hot-mix asphalt (HMA), while for the second format of the additive, the effects were evaluated on stone mastic asphalt (SMA). This second format represents an alternative that allows for the total replacement of the cellulose stabilizing additive used in the reference mix. The evaluation of fatigue damage in the mixes was performed using the four-point bending beam (4PB) test specified in European standard EN 12697-24. The test results show that the asphalt mixtures manufactured with WTTF-based additives exhibited a higher capacity to resist load cycles before failure compared to the reference mixtures. Likewise, once the asphalt mixtures were evaluated in a pavement structure by means of an empirical mechanistic analysis, the pavement structures composed of asphalt mixtures with WTTF-based additives showed significant improvements in their durability for the different load axes evaluated. For an average thickness of 15 cm of asphalt mix of a pavement-type structure, the use of the WTTF additive increases the durability of the structures by up to 129% and 112% compared to the HMA and SMA reference mixtures, respectively. These results show that both formats of the WTTF-based admixture improve the fatigue damage resistance of the HMA and SMA asphalt mixtures.

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