Moisture diffusion is one of the mechanisms by which water can reach the microstructure of asphalt mixtures and negatively affect their performance. In this work, a finite element model and computational simulations were used to study the response of asphalt pavement layers subjected to the coupled effects of moisture diffusion and mechanical loading. The model considered that the evolution of water-related diffusion processes in these materials is influenced by the microstructure of the mixture, particularly by the air void (AV) phase. Thus, a stochastic technique was used to incorporate the heterogeneity of the AV structure in compacted asphalt layers, which also permitted to account for the variability of the physical and mechanical properties that result from the heterogeneous void structure. The results demonstrate that moisture diffusion has a significant influence on the macromechanical response of asphalt pavement layers, especially during the initial months of service. In addition, the results clearly demonstrate that including the heterogeneity of material properties is valuable to quantify the uncertainty associated with these coupled processes.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Incorporating the heterogeneity of asphalt mixtures in flexible pavements subjected to moisture diffusion




    Erscheinungsdatum :

    2015




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch



    Klassifikation :

    BKL:    56.24 Straßenbau / 56.24



    Parameter Identification of Asphalt Pavements Subjected to Moving Loads

    Sun, Zhaojie / Kasbergen, Cor / Dalen, Karel N. van et al. | TIBKAT | 2020



    Inclusion of Moisture Effect in Fatigue Test for Asphalt Pavements

    Lu, Q. / Harvey, J.T. / Transportation & Development Institute (American Society of Civil Engineers); China Academy of Transportation Sciences | British Library Conference Proceedings | 2008


    Designing stone matrix asphalt mixtures for rut-resistant pavements

    Brown, E. Ray / Cooley, L. A. | TIBKAT | 1999