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    Volume 49, Issue 6 (January 2021)

    Using Polyphosphoric Acid and Sulfur to Improve Storage Stability, Aging, and Rheological Properties of High-Density Polyethylene–Modified Asphalt Binder

    (Received 18 October 2019; accepted 29 September 2020)

    Published Online: 26 January 2021

    CODEN: JTEVAB

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    Abstract

    One method for reducing the rutting failure of asphalt pavements is to modify the asphalt binder with polyethylene. However, the instability and phase separation between components has always been a major problem in achieving a homogeneous asphalt binder–polyethylene combination. To improve storage stability, one solution is to use crosslinking agents. In this study, the base asphalt binder was modified by using 3 and 7 % high-density polyethylene (HDPE). Subsequently, 1.5 % polyphosphoric acid (PPA) and 0.5 % sulfur were combined with polymer-modified asphalt binder to improve the stability between asphalt binder and polyethylene as well as reduce phase separation. First, the aging component of the prepared asphalt binder samples was evaluated using the attenuated total reflectance Fourier transform infrared spectrometer analysis. Then, the storage stability of asphalt binder samples was investigated by the frequency sweep test. The rutting resistance of asphalt binder samples was determined using the multiple stress creep recovery test, and finally, the fatigue performance of the rolling thin-film oven–aged asphalt binder samples was evaluated using the linear amplitude sweep test. The results revealed that, unlike the sulfur additive that did not have any beneficial effect on the HDPE-asphalt binder, the PPA increased the resistance of rutting, fatigue cracking, aging, and storage stability for the HDPE-asphalt binder.

    Author Information:

    Zarroodi, Roozbeh
    Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran,

    Naderi, Koorosh
    Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran,

    Goodarzi, Mehdi Moazami
    Department of Civil Engineering, Payame Noor University, Tehran,

    Nazari, Hossein
    Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran,

    Nejad, Fereidoon Moghadas
    Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran,


    Stock #: JTE20190804

    ISSN:0090-3973

    DOI: 10.1520/JTE20190804

    Author
    Title Using Polyphosphoric Acid and Sulfur to Improve Storage Stability, Aging, and Rheological Properties of High-Density Polyethylene–Modified Asphalt Binder
    Symposium ,
    Committee D04