Abstract
In order to better understand the aging of asphalt binders in the asphalt mixture that occurs during their service, asphalt mixture specimens with three different gradations of AC-13, SMA-13, SUP-13 were aged in an accelerated weathering machine(AWM) for various durations. Gel permeation chromatography(GPC) and Fourier transform infrared spectroscopy(FTIR) tests were performed separately on the recovered asphalts. Nonlinear models were established by fitting the measured properties. The results show that the aging rate and aging degree of asphalt binders can be well indicated by the parameters of the established nonlinear aging models. When the aging time is increased, the percentage of large molecule size and middle molecule size from GPC and the functional group of carbonyl from FTIR increase, the percentage of small molecule size and the functional group of butadiene from FTIR reduces; SMA-13 is overall performed the best in the aging-resistance among the three tested mixtures.
| Translated title of the contribution | Nonlinear Models of Micro-properties of Recovered Asphalt Binders in Weathered Asphalt Mixtures |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 780-785 |
| Number of pages | 6 |
| Journal | Jianzhu Cailiao Xuebao/Journal of Building Materials |
| Volume | 22 |
| Issue number | 5 |
| DOIs | |
| State | Published - Oct 1 2019 |
Scopus Subject Areas
- Civil and Structural Engineering
- Building and Construction
- Mechanics of Materials
Keywords
- Aging rate
- Fourier transform infrared spectroscopy(FTIR)
- Gel permeation chromatography(GPC)
- Nonlinear model
- Road engineering