Volume 42, Issue 5 (September 2014)

    Advanced Characterization of Clear Chip Seals

    (Received 9 May 2013; accepted 11 December 2013)

    Published Online: 2014

    CODEN: JTEOAD

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    Abstract

    Chip seals are widely used throughout the world for the construction and preventive maintenance of asphalt pavements because they are recognized as cost-effective solutions able to improve skid resistance while creating a waterproof surface. On the other hand, chip seals are often affected by early stone loss because of several, not always easily manageable, material-related and traffic-related factors. It is, therefore, in the interest of researchers to develop scientific methods able to predict the aggregate retention performance of chip seals. Given this background, in the present paper, a performance-based evaluation of chip seals with regard to aggregate retention properties is carried out through a laboratory test based on the Ancona shear testing research and analysis equipment. In this study, a chip seal prepared with a clear emulsion derived by emulsifying a synthetic clear binder was analyzed and compared with two traditional chip seals manufactured with a plain cationic bituminous emulsion and a styrene butadiene styrene polymer-modified asphalt emulsion, respectively. Specifically, six chip seals obtained by combining the three selected emulsions with two types of aggregates (crushed limestone and basalt) were tested at three different temperatures. Moreover, a rheological characterization of emulsion residues was also carried out through the dynamic shear rheometer and the binder bond strength adhesion tester. Results mainly showed that the investigated clear synthetic emulsion can be successfully used for the construction of clear chip seals in combination with aggregates of different mineralogy.


    Author Information:

    Pasquini, Emiliano
    Research Associate, Dept. of Civil and Building Engineering and Architecture, Università Politecnica delle Marche, Ancona,

    Bonati, Alice
    Dept. of Civil and Environmental Engineering, Università degli Studi di Parma, Parma,

    Giuliani, Felice
    Full Professor, Dept. of Civil and Environmental Engineering, Università degli Studi di Parma, Parma,

    Canestrari, Francesco
    Full Professor, Dept. of Civil and Building Engineering and Architecture, Università Politecnica delle Marche, Ancona,


    Stock #: JTE20130119

    ISSN: 0090-3973

    DOI: 10.1520/JTE20130119

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    Author
    Title Advanced Characterization of Clear Chip Seals
    Symposium , 0000-00-00
    Committee D04