Browse by Author "Leng, Zhen"

  • Al-Qadi, Imad L.; Cortina, Alejandro Salinas; Hasiba, Khaled I.; Ozer, Hasan; Leng, Zhen; Mahmoud, Enad; Parish, Derek C.; Worsfold, Stephen J. (2012-07)
    Interface bonding between pavement layers is a key factor affecting the performance of any pavement structure. Over the years, several studies have been performed to better understand bonding between pavement layers. The ...

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  • Al-Qadi, Imad L.; Hasiba, Khaled I.; Cortina, Alejandro Salinas; Ozer, Hasan; Leng, Zhen; Parish, Derek C.; Worsfold, Stephen J. (2012-07)
    Tack coat is a light layer of diluted asphalt that is applied to hot mix asphalt concrete (HMA) or Portland cement concrete (PCC) pavement surfaces to ensure good interface bonding between layers. Interface bonding is ...

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  • Leng, Zhen; Al-Qadi, Imad (2011-09)
    This report presents the comparative life cycle assessment (LCA) between warm stone mastic asphalt (SMA) and conventional SMA. Specifically, the study evaluated and compared the life cycle environmental and economic ...

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  • Al-Qadi, Imad l.; Leng, Zhen; Larkin, Al (2011-12)
    In-situ asphalt mixture density is critically important to the performance of flexible airport pavements: density that is too high, or too low, may cause early pavement distresses. Traditionally, two methods have been ...

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  • Leng, Zhen (2012-02-06)
    In-situ asphalt mixture density is critically important to the performance of flexible pavements: density that is too high, or too low, may cause early pavement distresses. Traditionally, two methods have been commonly ...

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  • Al-Qadi, Imad L.; Baek, Jongeun; Leng, Zhen; Wang, Hao; Doyen, Matthe; Kern, Jeff; Gillen, Steven L. (2012-01)
    The short-term performance of the stone matrix asphalt (SMA) prepared with various warm-mix techniques (EvothermTM 3G, Sasobit®, and foamed asphalt) was conducted using extensive laboratory tests and on-site stiffness ...

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  • Al-Qadi, Imad L.; Carpenter, Samuel H.; Leng, Zhen; Ozer, Hasan; Trepanier, James (Illinois Center for Transportation (ICT), 2009-02)
    Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavements is one of the most significant factors affecting overlay service life. This study was performed to quantify the effects ...

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  • Al-Qadi, Imad L.; Carpenter, Samuel H.; Leng, Zhen; Ozer, Hasan; Trepanier, James (Illinois Center for Transportation, 2008-09)
    Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavements can be one of the most significant factors affecting overlay service life. Various factors may affect the bonding ...

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