Mechanisms of Asphalt Blistering on Concrete Bridges

    Volume 9, Issue 3 (March 2012)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 1 March 2012

    Page Count: 16


    Hailesilassie, Biruk W.
    Infrastructure Engineering, Division of Highway and Railway Engineering, School of Architecture and the Built Environment, Royal Institute of Technology (KTH), Stockholm

    Partl, Manfred N.
    Associate Professor, Royal Institute of Technology (KTH), Stockholm

    Adjunct Research Professor, Department of Civil and Environmental Engineering, Carleton University, Ottawa,

    Director, Road Engineering/Sealing Components, EMPA, Swiss Federal Laboratories for Material Science and Technology,

    (Received 12 June 2011; accepted 29 November 2011)

    Abstract

    Blistering is a major problem in asphalt-covered concrete structures, such as multi-storage parking buildings, built-up roofs, tunnels, pedestrian areas, or concrete bridge decks. In this particular research, a linear viscoelastic finite-element model is developed to simulate time-dependent blister growth in an asphalt layer under uniformly applied pressure with and without temperature and pressure fluctuation. Indirect tensile tests on mastic asphalt (MA) are performed at three different temperatures to characterize and determine the material properties for the model. A three-dimensional thick-plate axisymmetric finite-element model is developed using ABAQUS with linear viscoelastic properties and validated with closed-form solution from first-order shear-deformation theory for thick plates. Elastic–viscoelastic analogy is used to find an analytic solution for the time-dependent deflection of the blister. In addition, the blister test is conducted on different samples of MA in the laboratory and digital image correlation measurement technique is used to capture the three-dimensional vertical deflection of the MA with time. Finally, the results from image correlation are compared with the finite-element simulation and thick-plate theory analytic solution. The finite-element model simulation shows that the daily temperature variations may have a significant influence on blister growth in asphalt pavements. It is found that the blister can grow continuously under repeated loading conditions over subsequent days. The study concludes that temperature fluctuation in the blister has more influence on blister growth than fluctuation of the pressure inside the blister.


    Paper ID: JAI104135

    DOI: 10.1520/JAI104135

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    Author
    Title Mechanisms of Asphalt Blistering on Concrete Bridges
    Symposium , 0000-00-00
    Committee C24