Evolution of Thermoviscoelastic Properties of Asphalt Mixtures with Oxidative Aging

2014 ◽  
Vol 2447 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Nathan E. Morian ◽  
Mohammad Zia Alavi ◽  
Elie Y. Hajj ◽  
Peter E. Sebaaly
Keyword(s):  
Asphalt Mixtures ◽  
Oxidative Aging

Oxidative Aging of Asphalt Binders in Hot-Mix Asphalt Mixtures

2011 ◽  
Vol 2207 (1) ◽  
pp. 107-116 ◽  
Author(s):  
Nathan Morian ◽  
Elie Y. Hajj ◽  
Charles J. Glover ◽  
Peter E. Sebaaly
Keyword(s):  
Hot Mix Asphalt ◽  
Asphalt Mixtures ◽  
Asphalt Binders ◽  
Oxidative Aging

A Hybrid Model to Predict the Gyratory Compaction of Hot Mixed Asphalt

2019 ◽  
Author(s):  
Teng Man
Keyword(s):  
Hybrid Model ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Aggregate Size ◽  
Asphalt Mixtures ◽  
Compaction Process ◽  
Particle Rearrangement ◽  
Compaction Behavior ◽  
Grain Size Distributions ◽  
Gyratory Compaction

The compaction of asphalt mixture is crucial to the mechanical properties and the maintenance of the pavement. However, the mix design, which based on the compaction properties, remains largely on empirical data. We found difficulties to relate the aggregate size distribution and the asphalt binder properties to the compaction behavior in both the field and laboratory compaction of asphalt mixtures. In this paper, we would like to propose a simple hybrid model to predict the compaction of asphalt mixtures. In this model, we divided the compaction process into two mechanisms: (i) visco-plastic deformation of an ordered thickly-coated granular assembly, and (ii) the transition from an ordered system to a disordered system due to particle rearrangement. This model could take into account both the viscous properties of the asphalt binder and grain size distributions of the aggregates. Additionally, we suggest to use the discrete element method to understand the particle rearrangement during the compaction process. This model is calibrated based on the SuperPave gyratory compaction tests in the pavement lab. In the end, we compared the model results to experimental data to show that this model prediction had a good agreement with the experiments, thus, had great potentials to be implemented to improve the design of asphalt mixtures.

scholarly journals Performance of steel slag aggregate in asphalt mixtures in a hot desert climate

2021 ◽  
Vol 14 ◽  
pp. e00534
Author(s):  
Khaled E. Hassan ◽  
Mohamed I.E. Attia ◽  
Murray Reid ◽  
Mohammed B.S. Al-Kuwari
Keyword(s):  
Steel Slag ◽  
Asphalt Mixtures ◽  
Desert Climate
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