01593392

Component

https://doi.org/10.3141/2507-13

The study of the fundamental properties of asphalt concrete (AC) can be used to improve and maximize the performance potential of these materials. In this paper, the fundamental approach is examined by coupling its essential hypothesis to an investigation of AC across multiple length scales. Asphalt and aggregate materials from the state of Arizona were used to prepare fine aggregate matrix (FAM) and AC samples. Laboratory tests on these materials were conducted to investigate the modulus and damage characteristics for two binder types. A comparison of mechanical response across length scales is not new, and the unique element of this study is testing both materials in the axial direction (tension–compression) for both modulus and fatigue. A strong relationship between these two materials was observed; this relationship suggests that tests on FAM samples can provide much needed insight in understanding the behavior of AC for various conditions. The study also investigated upscaling of the FAM properties to those of the AC mixture through a homogenized continua approach. Multiple upscale models were evaluated in this upscaling process, but the chosen method produced the best overall match to experimental data. The findings from this modeling effort were also used to upscale the behaviors of FAM to identify the fatigue characteristics of AC mixtures and evaluate the long-term performance of the material.

01593337

English

pp 120-127

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369336

Print

Figures; References; Tables

Asphalt concrete; Failure; Fine aggregates; Mix design

Arizona

Highways; Materials; Pavements

TRIS, TRB, ATRI

Mar 9 2016 7:44PM

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• Dynamic Modulus of Asphalt Mixtures: Evaluation of Effects on Pavement Performance Prediction
• Dynamic Modulus Prediction of Asphalt Concrete Mixtures Through Computational Micromechanics
• Flow Number Test and Assessment of AASHTO TP 79-13 Rutting Criteria: Comparison of Rutting Performance of Hot-Mix and Warm-Mix Asphalt Mixtures
• Investigating Reflective Cracking Mechanisms in Grid-Reinforced Asphalt Specimens: Use of Four-Point Bending Notched Beam Fatigue Tests and Digital Image Correlation
• Laboratory-Measured Dynamic Modulus and Predicted Performance of Asphalt Mixtures: Effects of Specimen Orientation
• Measurement of G* in Fine Asphalt Mixes: Dynamic Mechanical Analyzer Shear Test Implementation
• Prediction of Fatigue Failure at Asphalt Concrete Layer Interface from Monotonic Testing
• Prediction of Field Aging Gradient in Asphalt Pavements
• Probabilistic Modeling of Dynamic Modulus Master Curves for Hot-Mix Asphalt Mixtures
• Top-Down Fatigue Cracking in High-Temperature Environments
• Understanding Sources of Variability of Overlay Test Procedure
• Use of Mechanistic Models to Investigate Fatigue Performance of Asphalt Mixtures: Effects of Asphalt Mix Design Targets and Compaction