Abstract
Early fatigue cracking of the pavement was frequently observed on bridges with relatively thin decks of orthotropic design, particularly in hot climates. This study investigates the possible use of epoxy asphalt to stiffen a thin steel deck and mitigate flexural and fatigue failure. Three different epoxy asphalt binders were used and two pavement mix designs were employed. The binder and pavement mixture properties were evaluated with direct tensile test and pull-off strength test on the binder, Marshall and flexural fatigue tests on paving mixture with steel plates. Test results show that a relatively high modulus binder and a relatively stiff pavement can effectively reduce the composite’s deflection and improve fatigue resistance. Binder adhesion to the aggregate in the composite seems to play a pivotal role and the strength of this bond may have a close relationship with the stiffness of the pavement.
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Chen, C., Eisenhut, W.O., Lau, K., Ingram, A., Bors, J. (2019). Stiffening Thin Orthotropic Deck Structures with Thermoset Epoxy Asphalt for Improved Fatigue Resistance. In: Zhang, K., Xu, R., Chen, SH. (eds) Testing and Characterization of Asphalt Materials and Pavement Structures. GeoChina 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-319-95789-0_4
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