Finite element modelling of field compaction of hot mix asphalt. Part I: Theory |
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| Authors: | Eyad Masad A. Scarpas Alieh Alipour Kumbakonam R. Rajagopal Cor Kasbergen |
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| Affiliation: | 1. Department of Civil Engineering, Texas A&2. M University, College Station, TX 77843, USAemasad@civil.tamu.edu;4. Section of Pavement Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands;5. Department of Mechanical Engineering, Texas A&6. M University, ENPH Building, College Station, TX 77840, USA |
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| Abstract: | This paper presents the theoretical background for the development of a constitutive model that is used in the simulation of the compaction of asphalt mixtures. The constitutive model is developed to comply with the principles of thermodynamics, and is derived to represent the macroscopic behaviour of an asphalt mixture as a highly compressible viscoelastic material. The paper presents the details of the mathematical formulation and the computational implementation of the model in the finite element package computer-aided pavement analysis 3D. The capabilities of the compaction model and its sensitivity to changes in model's parameters are illustrated using simple numerical applications. In a companion publication, (Masad et al., Finite element modelling of field compaction of hot mix asphalt. Part II: Application, International Journal of Pavement Engineering, Accepted, 2014), the model is verified against field compaction measurements which demonstrate the ability of the model to capture the general trends of the compaction observed in the field. |
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| Keywords: | compaction constitutive modelling finite elements asphalt mixtures energy based models |
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