An approach to the characterization of unbound pavement materials for mechanistic analysis of pavements is presented. To predict permanent deformation, it is necessary to evaluate the residual properties of the materials. A method for evaluation of both the resilient and residual properties from repeated load testing is recommended. The residual properties of the material are described by three functions: ( a) the slope of the permanent strain versus number of load repetitions, S, on a loglog scale, ( b) the loading stress-strain curve of the first cycle, and ( c) the resilient properties of the material. The framework for evaluation of the permanent characteristics is presented. It is based on the theory of elastoplasticity. Two models developed by Vermeer and by Desai [hierarchical single-surface (HISS) model] are described. Test results conducted with a high-quality base course are presented and analyzed. It is found that ( a) the slope S depends slightly on the confining pressure and ( b) both models describe the dependence of total strain on stress. The HISS model with eight parameters fits the results better than the Vermeer model.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Permanent Deformation of a Granular Base Material


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:
    Uzan, Jacob (author)


    Publication date :

    1999-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English