Using binder and mixture space diagrams to evaluate the effect of re-refined engine oil bottoms on binders and mixtures after ageing

Walaa S. Mogawer, Alexander Austerman, Imad L. Al-Qadi, William Buttlar, Hasan Ozer, Brian Hill

Research output: Contribution to journalArticle

Abstract

This study addresses the New England state transportation agencies concerns associated with the use of Re-refined Engine Oil Bottoms (REOB) in asphalt binders and mixtures. The effect of REOB on the physical and rheological properties of a straight run asphalt binder was investigated after short-term and long-term aging and after extended long-term aging. Also, the effect of REOB modified binders on the performance of asphalt mixtures after short and long-term aging was evaluated in terms of moisture damage, rutting, and cracking. Rheological results showed that the addition of REOB caused the binders to age more relative to the straight run binder. The results also indicated that the use of higher dosages of REOB can cause increased binder aging. Overall, when the results from the particular mixture tests used in this study were plotted on a Performance Space Diagrams, the diagrams did not provide evidence that using REOB decreases performance.

Original languageEnglish (US)
Pages (from-to)154-182
Number of pages29
JournalRoad Materials and Pavement Design
Volume18
DOIs
StatePublished - Jan 27 2017

Keywords

  • Black space diagram
  • ageing
  • cracking
  • re-refined engine oil bottoms

ASJC Scopus subject areas

  • Civil and Structural Engineering

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