Aligning laboratory and field compaction practices for asphalt - the influence of compaction temperature on mechanical properties

F.R. Bijleveld*, S.R. Miller, A.H. de Bondt, A.G. Dorée

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)
24 Downloads (Pure)

Abstract

The approach used to identify a compaction temperature in the laboratory, based on binder viscosity, provides a single compaction temperature whereas, on-site, a roller operates within a temperature window. The effect on the density and mechanical properties of rolling during a temperature window remains unclear. Consequently, asphalt concrete binder mixtures were compacted in different temperature windows in the laboratory using a Roller Sector Compactor, and the observed phenomena were then related to field study observations. The results show that while similar densities can be achieved in a broad range of temperature windows, other mechanical properties such as fracture energy may decline up to 30% if compacted outside the optimum temperature window. These results indicate that a compaction temperature window should form part of mix design and quality control. The paper proposes specifying a compaction window based on temperatures and the resulting mechanical properties rather than a single compaction temperature.
Original languageEnglish
Pages (from-to)727-740
Number of pages14
JournalInternational journal of pavement engineering
Volume17
Issue number8
Early online date11 Mar 2015
DOIs
Publication statusPublished - 13 Sept 2016

Keywords

  • 2024 OA procedure
  • asphalt
  • compaction
  • cracking resistance
  • density
  • fracture energy
  • temperature

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