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    Volume 45, Issue 1 (January 2017)

    Special Issue Paper

    Influence of Moisture Conditioning on Linear Viscoelastic Behaviour of Bituminous Mixtures Used For Railway Trackbeds

    (Received 26 January 2016; accepted 18 May 2016)

    Published Online: 2017

    CODEN: JTEVAB

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    Abstract

    The influence of moisture on the linear-viscoelastic properties of bituminous mixtures with and without polymer modified bitumen (PMB) to be used for railway trackbeds was addressed in this paper. Nowadays, the use of bituminous mixtures in railway trackbeds, particularly for new high-speed lines, is a common practice. The variation of the thermomechanical properties of bituminous mixtures needs to be characterized considering railway loading, circulation speed, and environmental exposure conditions. For this purpose, improved 3D complex modulus tests were performed on base-course type mixtures. A tri-dimensional constitutive model, called 2S2P1D (2 Springs, 2 Parabolic creep elements and 1 Dashpot), was used to model the viscoelastic behavior of the materials. A moisture conditioning procedure was used to induce moisture damage to the mixtures. The thermomechanical properties of the materials are compared for the conditioned and non-conditioned states. Low variation of the linear viscoelastic behavior of the studied materials after moisture conditioning was observed. The results allowed assessing the interest of using polymer modified bitumen for bituminous mixtures to be used in railway trackbeds.


    Author Information:

    Ramirez Cardona, D.
    ENTPE, Vaulx en Velin,

    Di Benedetto, H.
    ENTPE, Vaulx en Velin,

    Sauzeat, C.
    ENTPE, Vaulx en Velin,

    Calon, N.
    SNCF Reseau, La Plaine St Denis,

    Saussine, G.
    SNCF Reseau, La Plaine St Denis,


    Stock #: JTE20160052

    ISSN:0090-3973

    DOI: 10.1520/JTE20160052

    Author
    Title Influence of Moisture Conditioning on Linear Viscoelastic Behaviour of Bituminous Mixtures Used For Railway Trackbeds
    Symposium ,
    Committee D04