Browsing by Author "Alabaster, David"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Interpretation of laboratory and full-scale testing of New Zealand foamed bitumen pavements using finite-element modelling
    (TAYLOR & FRANCIS LTD, 2012) Gonzalez, Alvaro; Cubrinovski, Misko; Alabaster, David; Thenoux, Guillermo
    A large research project on foamed bitumen (FB) stabilisation was conducted in New Zealand. The project consisted of an extensive laboratory and full-scale testing of FB pavements. The objective of this paper is to interpret the performance of FB pavements by using finite-element (FE) modelling. The mechanical properties of the materials were calculated using testing data and used as material inputs in the FE modelling. The MohrCoulomb and DruckerPrager material models were adopted to calculate plastic deformation, which is related to pavement rutting. Results of the modelling indicate that increasing the FB content increases the tensile strength and modulus of the pavements, reducing the plastic deformations in the subgrade and the stabilised layer. In addition, adding FB reduces sensitivity to rutting when pavement is overloaded or the asphalt surface layer is cracked.
  • No Thumbnail Available
    Item
    Strength and Deformational Characteristics of Foamed Bitumen Mixes under Suboptimal Conditions
    (2011) Gonzalez Vaccarezza, Alvaro Andres; Cubrinovski, Misko; Pidwerbesky, Bryan; Alabaster, David