Header menu link for other important links
X
Evolution of energy dissipation during four-point bending of bituminous mixtures
Published in Taylor and Francis Ltd.
2017
Volume: 18
   
Pages: 252 - 263
Abstract

In this investigation, the fatigue life of bituminous mixtures is characterised using the four-point bending test. Two sets of bituminous concrete samples, one produced with unmodified binder and other with plastomer-modified binder, are subjected to repeated strain-controlled sinusoidal loading at 10 Hz frequency and 20°C. The test is conducted for three different strain amplitudes of 200, 400 and 600 microstrain and the corresponding stress and strain data are collected at 1/1000 second interval. In the first approach, these data are used to calculate total energy dissipation. The dissipation due to damage is determined by separating viscoelastic dissipation from the total dissipation. For this purpose, a linear viscoelastic model is used. In the second approach, the discontinuity in the evolution of phase lag determined from the stress–strain plot is taken as the onset of fatigue damage. The fatigue failure, as quantified by these two approaches, was found to be closer to the fatigue life computed using energy ratio method. © 2017 Informa UK Limited, trading as Taylor & Francis Group.

About the journal
JournalData powered by TypesetRoad Materials and Pavement Design
PublisherData powered by TypesetTaylor and Francis Ltd.
ISSN14680629
Open AccessNo
Concepts (13)
  •  related image
    Binders
  •  related image
    Bins
  •  related image
    BITUMINOUS MATERIALS
  •  related image
    Energy dissipation
  •  related image
    Fatigue of materials
  •  related image
    Mixtures
  •  related image
    Viscoelasticity
  •  related image
    DISSIPATED ENERGY
  •  related image
    FOUR POINT BENDING
  •  related image
    LISSAJOUS
  •  related image
    Phase angles
  •  related image
    VISCOELASTIC DISSIPATION
  •  related image
    Fatigue damage