Finite element modelling of field compaction of hot mix asphalt. Part II: Applications

Abstract

A constitutive model is developed and implemented in the finite element system three-dimensional computer-aided pavement analysis for the simulation of hot mix asphalt field compaction. The details of this model are presented in a companion paper (Masad et al., Finite element modelling of field compaction of hot mix asphalt. Part I: Theory, International Journal of Pavement Engineering, Accepted, 2014). This model is based on nonlinear viscoelasticity theory and can accommodate large deformations that occur during the compaction process. The model was used to study the influence of frequency and amplitude of vibratory compaction rollers on the level of compaction. In addition, it was used to analyse the influence of various methods for compacting longitudinal joints on the percent air voids near these joints. The model was used to simulate the compaction of asphalt pavements with different structures and compacted using various equipment and patterns. The finite element results of the level of compaction and percent air voids were in reasonable agreement with the measurements. The model offers the opportunity to simulate and predict the compaction of asphalt mixtures under various rolling patterns and for different pavement structures.

Finite element modelling of field compaction of hot mix asphalt. Part I: Theory

“…In Part II of this sequence of articles (Masad et al 2014), the constitutive model will be verified against field compaction measurements to show its ability to capture the influence of various boundary conditions (fixed/free) near the longitudinal joint and simulation of the general trends of the compaction observed in the field.…”

“…In a companion publication, Masad et al (2014), the model is verified against field compaction measurements which demonstrate the ability of model to capture the general trends of the compaction observed in the field.…”

“…Recently, in a cooperation project between Texas A&M University and Delft University of Technology, a theoretical framework for modelling asphalt mixture compaction has been developed and utilised to simulate the compaction of asphalt mixtures in laboratory and field (Koneru et al 2008, Masad et al 2009, 2010, 2014. A nonlinear visco-elastic material model within a large deformation framework has been developed and implemented in the finite elements system CAPA 3D (computer-aided pavement analysis; Scarpas 2000).…”

Linking the Effect of Aggregate Interaction to the Compaction Theory for Asphalt Mixtures Using Image Processing

“…Since the aggregates in asphalt mixtures are over 90% by mass, the aggregates play an important role in the compaction of asphalt mixtures, as well as in determining the mechanical behavior of the asphalt pavement. The response of aggregates during compaction depends on the compaction temperature and applied pressure by rollers [17,33,34]. Accordingly, the internal structure of an asphalt mixture has been indirectly determined by investigating the preferred aggregate orientation, interface contact between aggregate and binder, and adhesive characteristics between aggregates [4,5,15,[35][36][37][38][39][40][41][42][43].…”

An Image-Based Finite Element Approach for Simulating Viscoelastic Response of Asphalt Mixture

“…Many numerical attempts have been made to investigate the internal behavior of asphalt mixture or to estimate the test indices that can represent the macro phenomena under certain conditions [1][2][3][4][5]. But these researches consider the asphalt mixture as being homogenous material with equivalent properties.…”