Comparison of conventional, polymer, and rubber asphalt mixtures using viscoelastic continuum damage model

Waleed A. Zeiada, B. Shane Underwood, Tina Pourshams, Jeffrey Stempihar, Kamil Kaloush

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

In this study, a laboratory experimental programme was conducted to compare the material properties and fatigue performance characteristics for reference, polymer-modified and rubber-modified gap-graded mixtures. These mixtures were placed on E18 highway between the interchanges Järva Krog and Bergshamra in the Stockholm area of Sweden. The advanced material characterisation tests included dynamic (complex) modulus for stiffness evaluation and the uniaxial tension-compression for fatigue assessment. The data were used to compare the performance of the rubber-modified gap-graded mixture to the reference and polymer-modified gap mixtures using the viscoelastic continuum damage (VECD) approach. Different researchers have successfully applied the VECD model to describe the fatigue behaviour of asphalt concrete mixtures. The damage characteristic (C-S) curves were established for each of the three mixtures. The fatigue behaviour for the three mixtures was ranked based on the C-S curve results and the rubber-modified mixture showed the best fatigue damage resistance followed by the polymer-modified and reference mixtures. The VECD approach provides a more comprehensive analysis to evaluate fatigue resistance compared with the traditional fatigue evaluation using a number of cycles at a given stiffness reduction.

Original languageEnglish (US)
Pages (from-to)588-605
Number of pages18
JournalRoad Materials and Pavement Design
Volume15
Issue number3
DOIs
StatePublished - Jul 2014

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Keywords

  • dynamic modulus
  • fatigue
  • polymer-modified
  • rubber-modified
  • viscoelastic continuum damage

ASJC Scopus subject areas

  • Civil and Structural Engineering

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