Fatigue properties of nano-reinforced bituminous mixtures: A viscoelastic continuum damage approach

Fabrizio Miglietta, B. Shane Underwood, Lucia Tsantilis, Orazio Baglieri, Kamil Kaloush, Ezio Santagata

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The experimental investigation described in this paper focused on the effects of nanoclays on the fatigue behaviour of bituminous mixtures. Damage characteristics of a bituminous mixture produced by making use of a nano-reinforced binder were compared to those of a reference mixture obtained by employing the same neat bitumen used as a base in the preparation of the nanoclay–bitumen blend. Dynamic modulus tests and direct tension cyclic fatigue tests were carried out to determine the linear viscoelastic properties and the damage evolution characteristics of materials. Corresponding results were modelled by means of a viscoelastic continuum damage approach and by making use of a more empirical evaluation based on the classical Wöhler representation. It was found that the use of nanoclays produced a reinforcement of bituminous mixtures, the benefits of which were observed both in the progression of damage and in the occurrence of ultimate failure conditions.

Original languageEnglish (US)
JournalInternational Journal of Pavement Research and Technology
DOIs
StateAccepted/In press - 2018

Keywords

  • Bituminous mixture
  • Fatigue
  • Nanoclay
  • Viscoelastic continuum damage theory

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials

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