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.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

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


    Additional title:

    Transportation Research Record




    Publication date :

    2022-05-05




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Long-Term Field Aging of Warm-Mix and Hot-Mix Asphalt Binders

    Zhang, Weiguang / Shen, Shihui / Wu, Shenghua et al. | Transportation Research Record | 2017


    Long-Term Aging Performance Analysis of Oil Modified Asphalt Binders

    Kilger, Albert / Swiertz, Daniel / Bahia, Hussain U. | Transportation Research Record | 2019



    Laboratory Aging and Annealing of Asphalt Binders by Microwave Radiation

    Bishara, S. / McReynolds, R. | Transportation Research Record | 1996