Characterization of a recycling agent for restoring aged bitumen

Jian-Shiuh Chen, Cheng Te Lee, Yen Yu Lin

Research output: Contribution to journalArticle

Abstract

High reclaimed asphalt pavement (RAP) content mixes are likely to be susceptible to pavement distress such as fatigue cracking and raveling because of aged bitumen. In this study, the potential of recycling agents to restore hardened binders to desired properties was evaluated. Aged bitumen extracted from field cores was blended with different concentrations of a rejuvenating agent. The rheological properties of the asphalt samples were tested using a Brookfield viscometer and a dynamic shear rheometer (DSR). Furthermore, in order to better understand the recycling effect, the chemical properties of the binders were measured using Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). A correlation was found between percentages of large molecules obtained from GPC and the viscoelastic properties of bitumen blends. The aging characteristics were determined by measuring functional group changes in carbonyl and sulfoxide peak areas by FTIR. Both rheological and chemical analyses are needed to characterize the effects of a recycling agent on bitumen blends.

Original languageEnglish
Article number05018003
JournalJournal of Materials in Civil Engineering
Volume30
Issue number8
DOIs
Publication statusPublished - 2018 Aug 1

Fingerprint

asphalt
Recycling
Gel permeation chromatography
Binders
Fourier transform infrared spectroscopy
sulfoxide
Asphalt pavements
Viscometers
Rheometers
Asphalt
Pavements
Chemical properties
Functional groups
Aging of materials
Fatigue of materials
Molecules

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "High reclaimed asphalt pavement (RAP) content mixes are likely to be susceptible to pavement distress such as fatigue cracking and raveling because of aged bitumen. In this study, the potential of recycling agents to restore hardened binders to desired properties was evaluated. Aged bitumen extracted from field cores was blended with different concentrations of a rejuvenating agent. The rheological properties of the asphalt samples were tested using a Brookfield viscometer and a dynamic shear rheometer (DSR). Furthermore, in order to better understand the recycling effect, the chemical properties of the binders were measured using Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). A correlation was found between percentages of large molecules obtained from GPC and the viscoelastic properties of bitumen blends. The aging characteristics were determined by measuring functional group changes in carbonyl and sulfoxide peak areas by FTIR. Both rheological and chemical analyses are needed to characterize the effects of a recycling agent on bitumen blends.",
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Characterization of a recycling agent for restoring aged bitumen. / Chen, Jian-Shiuh; Lee, Cheng Te; Lin, Yen Yu.

In: Journal of Materials in Civil Engineering, Vol. 30, No. 8, 05018003, 01.08.2018.

Research output: Contribution to journalArticle

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