Development of an analytical framework for evaluation of critical fiber length in asphalt concrete with a fiber pullout test

Hossein Noorvand, Barzin Mobasher, Shane Underwood, Kamil Kaloush

Research output: Contribution to journalArticlepeer-review

Abstract

The interfacial shear bond strength (τ) between fibers and matrix is typically measured by fiber pullout test to determine the critical fiber length (Lc) in fiber reinforced composites. In fiber reinforced asphalt concrete (FRAC), the τ is a time-dependent property and it is affected by asphalt modulus. The main objective of this study was to establish a relationship between the τ and modulus of asphalt mastic and asphalt concrete (AC), from which the Lc in AC was determined. Results from direct tension test, performed to validate the analytical framework, suggested that the use of longer fibers (38-mm vs 19-mm) showed higher reinforcement efficiency in FRAC.

Original languageEnglish (US)
Article number129561
JournalConstruction and Building Materials
Volume360
DOIs
StatePublished - Dec 19 2022
Externally publishedYes

Keywords

  • Apparent modulus
  • Aramid fibers
  • Asphalt mastic and concrete
  • Critical fiber length
  • FRAC
  • Pullout test
  • Shear strength

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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