Laboratory Evaluation of ESGFIBER in Asphalt Paving Mixture

Mrema, Agathon Honest; Kim, Hyeong-Su; Lim, Julianne; Lee, Jaejun

doi:10.3390/ma15165754

Cited by 1 publication

(1 citation statement)

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“…However, after the optimum content was reached, agglomeration and uneven dispersion were more likely to occur due to excessive fiber, which affected the effects of fiber in asphalt mixtures and reduced the performance improvement effect. A. Mrema et al added glass fiber to a dense-graded asphalt mixture, and the experimental investigation revealed that with the increase of glass fiber content, the indirect tensile strength initially exhibited an increase trend and then decreased [31]. Therefore, it is necessary to consider the dispersion uniformity when mixing various types of fibers into asphalt mixtures.…”

Section: Effects Of Fiber Type On Cracking Resistancementioning

confidence: 99%

Research on Fracture Behavior of Fiber–Asphalt Mixtures Using Digital Image Correlation Technology

Li,

Zhou,

Kang

et al. 2023

Materials

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Many researchers use fiber to improve the cracking resistance of asphalt mixtures, but research concerning the effects of fiber on fracture behavior is limited. The fracture behavior of asphalt mixtures with various fiber types (basalt fiber, glass fiber, and polyester fiber) and contents (0.1%, 0.2%, 0.3%, 0.4%, and 0.5%) has been studied using the indirect tensile asphalt cracking test (IDEAL-CT) in conjunction with digital image correlation (DIC) technology. The evaluation indexes used in the test included crack initiation energy (Gif), crack energy (Gf), splitting tensile strength (RT), cracking tolerance index (CTindex), and the real-time tensile strain (Exx) obtained using digital image correlation technology. The results showed that despite the fiber type, the increase of fiber content resulted in first, an increase, and then, a decrease of the cracking resistance of asphalt mixtures, indicating the presence of optimum fiber content—specifically, 0.4%, 0.3%, and 0.3% for basalt fiber, glass fiber, and polyester fiber, respectively. The development of real-time tensile strain, obtained based on digital image correlation technology, could be divided into two stages: slow-growth stage and rapid-expansion stage. In addition, asphalt mixture with basalt fiber presented the best cracking resistance at both the slow-growth and rapid-expansion stages. This research is helpful in understanding the effects of fiber type and content on the fracture behavior of asphalt mixtures and has certain reference significance for the application of fiber in asphalt mixtures.

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Section: Effects Of Fiber Type On Cracking Resistancementioning

confidence: 99%