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Crack Resistance in Asphalt Mixtures Reinforced With Glass and Polyester Fibers: A Fracture Mechanics and Statistical Evaluation.

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Title: Crack Resistance in Asphalt Mixtures Reinforced With Glass and Polyester Fibers: A Fracture Mechanics and Statistical Evaluation.
Authors: Esmaeili, Niloofar1 (AUTHOR), Samadzad, Mahdi1 (AUTHOR), Alavi, Mohammad Zia1 (AUTHOR) zia.alavi@ut.ac.ir, Mangiafico, Salvatore2 (AUTHOR), Sauzéat, Cédric2 (AUTHOR)
Source: Fatigue & Fracture of Engineering Materials & Structures. Jul2026, Vol. 49 Issue 7, p2793-2809. 17p.
Subjects: Polyester fibers, Glass fibers, Temperature effect, Asphalt, Fracture mechanics, R-curves, Fibrous composites
Abstract: This study investigates the fracture resistance of polyester (PE) and glass (G) fiber‐reinforced asphalt composite through a mechanistic and statistical evaluation using the semicircular bending (SCB) test under pure Mode I and mixed‐mode I/II loading. Nine fiber‐reinforced mixtures were prepared with two fiber lengths (12 and 18 mm) and contents (PE: 0.25% and 0.40%; G: 0.12% and 0.25%) and tested at −12°C and 25°C with three notch lengths (10, 20, and 30 mm). The results showed that PE fibers consistently enhanced fracture energy, post‐peak ductility, and crack‐bridging capacity across temperatures, particularly at 25°C. Conversely, glass fibers improved peak load and stiffness primarily at low temperature and lower notch severities. Statistical analyses confirmed significant interactions between fiber type, temperature, and notch geometry. The findings demonstrate that PE fibers promote ductile fracture behavior over a wider range of thermomechanical conditions, while glass fibers are more effective in stiffness‐dominated, brittle fracture regimes. Summary: Polyester fibers enhance post‐peak ductility over a wide temperature range.Glass fibers increase stiffness primarily under low‐temperature fracture.Mixed‐mode loading reveals realistic crack evolution mechanisms.Fiber effectiveness is governed by temperature and crack severity. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:This study investigates the fracture resistance of polyester (PE) and glass (G) fiber‐reinforced asphalt composite through a mechanistic and statistical evaluation using the semicircular bending (SCB) test under pure Mode I and mixed‐mode I/II loading. Nine fiber‐reinforced mixtures were prepared with two fiber lengths (12 and 18 mm) and contents (PE: 0.25% and 0.40%; G: 0.12% and 0.25%) and tested at −12°C and 25°C with three notch lengths (10, 20, and 30 mm). The results showed that PE fibers consistently enhanced fracture energy, post‐peak ductility, and crack‐bridging capacity across temperatures, particularly at 25°C. Conversely, glass fibers improved peak load and stiffness primarily at low temperature and lower notch severities. Statistical analyses confirmed significant interactions between fiber type, temperature, and notch geometry. The findings demonstrate that PE fibers promote ductile fracture behavior over a wider range of thermomechanical conditions, while glass fibers are more effective in stiffness‐dominated, brittle fracture regimes. Summary: Polyester fibers enhance post‐peak ductility over a wide temperature range.Glass fibers increase stiffness primarily under low‐temperature fracture.Mixed‐mode loading reveals realistic crack evolution mechanisms.Fiber effectiveness is governed by temperature and crack severity. [ABSTRACT FROM AUTHOR]
ISSN:8756758X
DOI:10.1111/ffe.70273