Evaluation of Permanent Deformation Models in Asphalt Mixture Overlays for Hot Climates

Abstract:

Results from a third mobile load simulator (MLS3) experiment indicates that in-situ determination of the under laying pavement material elastic modulus properties using the back calculation method from falling weight deflection measurements provide reliable material model inputs for finite element analysis. In this study, finite element (FE) prediction models available in abaqus were implemented to simulate the rutting performance of asphalt mixture overlays under accelerated loading. A unified, three dimensional pavement section was proposed as a constitutive material model for the rutting prediction of various pavement section combinations in FE analysis. The asphalt overlay mix was treated as an elastic material and its corresponding material properties were determined from laboratory tests while falling weight deflection tests were conducted to determine the underlaying layer moduli. In general, the FE creep and elasto-viscoplastic models predicted that rutting developments match well with the MLS3 measured results. However, to perform an effective evaluation of the FE simulation analysis and obtain reliable prediction results from an MLS3 experiment, some special techniques to obtain and characterize material input parameters are deemed necessary.

• Periodical: Advanced Materials Research (Volume 723)
• Pages: 737-744
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.723.737
• Online since: August 2013
• Authors: Aaron D. Mwanza, Pei Wen Hao, Xiao Ming Dong
• Keywords: ABAQUS, Finite Element Analysis (FEA), Model, Permanent Deformation, Rutting

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