Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Multiscale testing-analysis of asphaltic materials considering viscoelastic and viscoplastic deformation
Fine aggregate matrix (FAM) is a phase consisting of asphalt binder, air voids, fine aggregates and fillers. It acts as a primary phase in evaluating the damage and deformation of entire asphalt concrete mixtures. The simplicity, repeatability and efficiency of the FAM testing make it a very attractive specification-type approach for evaluating the performance characteristics of the entire asphalt concrete mixtures. This study explores a linkage in the deformation characteristics between the two length scales: asphalt concrete mixture scale and its corresponding FAM scale. To that end, a simple creep-recovery test was conducted for both mixtures (i.e. asphalt concrete mixture and its corresponding FAM phase) at various stress levels. Test results were compared and analysed using Schapery's single-integral viscoelastic theory and Perzyna-type viscoplasticity with a generalised Drucker-Prager yield surface. In particular, stress-dependent nonlinear viscoelastic and viscoplastic behaviours were characterised in addition to linear viscoelastic deformation characteristics, because the nonlinear viscoelastic and viscoplastic behaviours are considered significant in asphalt pavements that are subjected to heavy vehicle loads and elevated service temperatures. With a limited scope and test-analysis results at this stage, it was found that there is a strong link between the FAM and asphalt concrete in (linear and nonlinear) viscoelastic and viscoplastic deformation characteristics. This implies that the viscoelastic stiffness characteristics and viscoplastic hardening of typical asphalt concrete mixtures could be estimated or predicted from the simple FAM-based testing-analysis method, which can significantly reduce the experimental-analytical efforts required for asphalt concrete mixtures.
Multiscale testing-analysis of asphaltic materials considering viscoelastic and viscoplastic deformation
Fine aggregate matrix (FAM) is a phase consisting of asphalt binder, air voids, fine aggregates and fillers. It acts as a primary phase in evaluating the damage and deformation of entire asphalt concrete mixtures. The simplicity, repeatability and efficiency of the FAM testing make it a very attractive specification-type approach for evaluating the performance characteristics of the entire asphalt concrete mixtures. This study explores a linkage in the deformation characteristics between the two length scales: asphalt concrete mixture scale and its corresponding FAM scale. To that end, a simple creep-recovery test was conducted for both mixtures (i.e. asphalt concrete mixture and its corresponding FAM phase) at various stress levels. Test results were compared and analysed using Schapery's single-integral viscoelastic theory and Perzyna-type viscoplasticity with a generalised Drucker-Prager yield surface. In particular, stress-dependent nonlinear viscoelastic and viscoplastic behaviours were characterised in addition to linear viscoelastic deformation characteristics, because the nonlinear viscoelastic and viscoplastic behaviours are considered significant in asphalt pavements that are subjected to heavy vehicle loads and elevated service temperatures. With a limited scope and test-analysis results at this stage, it was found that there is a strong link between the FAM and asphalt concrete in (linear and nonlinear) viscoelastic and viscoplastic deformation characteristics. This implies that the viscoelastic stiffness characteristics and viscoplastic hardening of typical asphalt concrete mixtures could be estimated or predicted from the simple FAM-based testing-analysis method, which can significantly reduce the experimental-analytical efforts required for asphalt concrete mixtures.
Multiscale testing-analysis of asphaltic materials considering viscoelastic and viscoplastic deformation
Im, Soohyok (Autor:in) / You, Taesun / Ban, Hoki / Kim, Yong-Rak
2017
Aufsatz (Zeitschrift)
Englisch
Aggregates , Viscoelasticity , Damage assessment , Heavy vehicles , asphalt material , fine aggregate matrix (FAM) , Multiscale method , Voids , Concretes , Fillers , Loads (forces) , Test procedures , Stiffness , Pavements , Hardening , Multiscale analysis , Asphalt pavements , Deformation , Reproducibility , viscoplasticity , Creep (materials) , viscoelasticity , Viscoplasticity , Repeatability
| Taylor & Francis Verlag | 2017
Linear Viscoelastic Performance of Asphaltic Materials
| Taylor & Francis Verlag | 2003
Multiscale Curvature Analysis of Asphaltic Aggregate Particles
| Online Contents | 2010
Multiscale Curvature Analysis of Asphaltic Aggregate Particles
| British Library Online Contents | 2010