Volume 34, Issue 4 (July 2006)

    Effect of Bitumen Acid Number on Moisture Susceptibility of Asphalt Mixtures

    (Received 15 February 2005; accepted 13 October 2005)

    Published Online: 2006

    CODEN: JTEOAD

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    Abstract

    The interaction between bitumen and aggregate is a primary determinant of asphalt mixture strength; not only is adhesion between bitumen and aggregate related to the aggregate, but it is also a bitumen property. Three different kinds of test methods are used to evaluate the bitumen aggregate bond: the water immersion test, the electro-optic colorimerty test, and the net adsorption test. Retained Marshall stability and modified Lottman test methods are used to evaluate the moisture damage to asphalt mixtures. The paper analyzes relationships between bitumen acid number and asphalt aggregate mixture performance. The results show that aggregate type has a dominant influence on the bitumen aggregate bond, but bitumen type also has an important influence on asphalt mixture performance. When the bitumen acid number is higher, the asphalt mixture is more resistant to moisture damage. The net adsorption test is a better method to evaluate the bitumen aggregate bond; the bitumen acid number can be used to evaluate moisture susceptibility with different bitumens.


    Author Information:

    Hao, P
    Professor and Graduate Student, Highway College, Chang'an University, South Er Huan Road, Middle Section, Xi'an, Shaanxi

    Liu, HY
    Professor and Graduate Student, Highway College, Chang'an University, South Er Huan Road, Middle Section, Xi'an, Shaanxi


    Stock #: JTE14080

    ISSN: 0090-3973

    DOI: 10.1520/JTE14080

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    Author
    Title Effect of Bitumen Acid Number on Moisture Susceptibility of Asphalt Mixtures
    Symposium , 0000-00-00
    Committee D04