Early-age performance characterization of hot-mix asphalt overlay with varying amounts of asphalt binder replacement

Shenghua Wu, Imad L. Al-Qadi, David L. Lippert, Hasan Ozer, Arturo F.Espinoza Luque, Fazal R. Safi

Research output: Contribution to journalArticle

Abstract

This study examined five field projects in Illinois, with eight different surface mixes having varying asphalt binder replacement (ABR) achieved by using binders from recycled asphalt shingles (RAS) and reclaimed asphalt pavement (RAP). The performance testing was conducted on plant-mixed laboratory-compacted (PMLC) specimens and consisted of dynamic modulus, overlay tester, Illinois Flexibility Index Test (I-FIT), flow number, and Hamburg wheel tracking tests. The early-age field performance was evaluated, and correlation with performance tests was conducted. Results showed that ABR, asphalt content, and binder grade have effects on rutting and cracking resistance. No rutting issues were found with any of the tested mixes. The flexibility index (FI) values of field cores were higher than PMLC specimens, as no specimen thickness and air void corrections were applied at this time. I-FIT is recommended as a simple performance test to screen and distinguish between mixes for potential cracking.

Original languageEnglish (US)
Pages (from-to)294-306
Number of pages13
JournalConstruction and Building Materials
Volume153
DOIs
StatePublished - Oct 30 2017

Keywords

  • Asphalt binder replacement
  • Field cores
  • Flexibility index
  • Performance
  • Performance characterization
  • Plant mixed laboratory compacted (PMLC)

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Early-age performance characterization of hot-mix asphalt overlay with varying amounts of asphalt binder replacement'. Together they form a unique fingerprint.

  • Cite this