Impacts of Field and Laboratory Long-Term Aging on Asphalt Binders

Punit Singhvi, Javier J.García Mainieri, Hasan Ozer, Brajendra Kumar Sharma, Imad L. Al-Qadi, Kelly L. Morse

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Asphalt binder aging accelerates cracking of flexible pavement. Quantifying the extent of binder aging allows the formulation and selection of appropriate binders for flexible pavement applications. Asphalt binder aging depends on climatic exposure, asphalt concrete field-surface density, and binder chemistry. The aim of this work was to select a laboratory-aging protocol to represent realistic field aging in Illinois. Binders were extracted from field cores aged from eight to 31 years. Extracted binders were tested for rheology and chemical characteristics. Small-and large-strain rheological parameters were determined. In addition, chemical functional groups and molecular weight distribution of extracted binders were evaluated. Effects of aging across pavement depth were also investigated. Double pressure-aging vessel (PAV) was identified as a suitable laboratory long-term aging protocol to represent eight to 12 years of aging for flexible pavements in Illinois. Thresholds were proposed for selected small-and large-strain rheological parameters representing realistic field aging. These thresholds may be used for binder selection and procurement to ensure the binder’s long-term performance. Furthermore, chemical analysis on extracted binders showed that only specific carbonyl functional groups are affected by field aging.

Original languageEnglish (US)
Title of host publicationTransportation Research Record
PublisherSAGE Publications Ltd
Pages336-353
Number of pages18
Edition8
DOIs
StatePublished - Aug 2022

Publication series

NameTransportation Research Record
Number8
Volume2676
ISSN (Print)0361-1981
ISSN (Electronic)2169-4052

Keywords

  • asphalt binder aging
  • binder specifications
  • binders
  • infrastructure
  • materials
  • rheological properties
  • rheology

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering

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