Numerical study of the aggregate contact effect on the complex modulus of asphalt concrete

Tan, Zhifei; Leng, Zhen; Jiang, Jiwang; Cao, Peng; Jelagin, Denis; Li, Gaoyang; Sreeram, Anand

doi:10.1016/j.matdes.2021.110342

Cited by 19 publications

(8 citation statements)

References 41 publications

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“…For other components inside the asphalt mixture, Wu et al [114] conducted 3D FEM modeling on the Micro-Deval test to evaluate the wear properties of aggregates. Tan et al [115] focused on the aggregate-to-aggregate contact issue and quantitively evaluated the effect of the contact zone on the visco-elastic performance of the asphalt mixture using the 3D FEM microstructural model. Cheng et al [116] investigated the distribution of basalt fibers inside asphalt mortar using 3D FEM modeling and then validated the numerical results by CT scanning and reconstruction.…”

Section: Components' Properties Of the Asphalt Mixturementioning

confidence: 99%

Review on Design, Characterization, and Prediction of Performance for Asphalt Materials and Asphalt Pavement Using Multi-Scale Numerical Simulation

Wang,

Wang

2024

Materials

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Asphalt pavement, which is mainly made up of the asphalt mixture, exhibits complicated mechanical behaviors under the combined effects of moving vehicle loads and external service environments. Multi-scale numerical simulation can well characterize behaviors of asphalt materials and asphalt pavement, and the essential research progress is systematically summarized from an entire view. This paper reviews extensive research works concerning aspects of the design, characterization, and prediction of performance for asphalt materials and asphalt pavement based on multi-scale numerical simulation. Firstly, full-scale performance modeling on asphalt pavement is discussed from aspects of structural dynamic response, structural and material evaluation, and wheel–pavement interaction. The correlation between asphalt material properties and pavement performance is also analyzed, and so is the hydroplaning phenomenon. Macro- and mesoscale simulations on the mechanical property characterization of the asphalt mixture and its components are then investigated, while virtual proportion design for the asphalt mixture is introduced. Features of two-dimensional and three-dimensional microscale modeling on the asphalt mixture are summarized, followed by molecular dynamics simulation on asphalt binders, aggregates, and their interface, while nanoscale behavior modeling on asphalt binders is presented. Finally, aspects that need more attention concerning this study’s topic are discussed, and several suggestions for future investigations are also presented.

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Section: Components' Properties Of the Asphalt Mixturementioning

confidence: 99%

Review on Design, Characterization, and Prediction of Performance for Asphalt Materials and Asphalt Pavement Using Multi-Scale Numerical Simulation

Wang,

Wang

2024

Materials

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“…Qian et al [ 30 ] analyzed the influence of different compaction methods (Marshall impact compaction and static compaction) on the distribution characteristics of contact number with depth of specimen using DEM simulation test method. Tan et al [ 16 ] established 3D FEM models based on CT scanning images by incorporating AC cores into the numerical model and quantified the impact of aggregate contact zone ratio on the visual properties of matrix phase. It was discovered that although the contact zone only makes up a minuscule volume proportion of AC, due to its substantially greater modulus than asphalt matrix, it can significantly raise the modulus of AC within the low-frequency region.…”

Section: Characterization Of Load Transfer Mechanismmentioning

confidence: 99%

“…Recent studies of the load transfer mechanism in asphalt mixture focus on three aspects: contact mechanical behavior, contact force characteristics, and force chain characteristics. The research on contact mechanical behavior of asphalt mixture is mainly focused on analyzing the aggregate contact, such as aggregate contact zone [ 16 ], aggregate contact chain structure [ 2 , 17 , 18 , 19 ], and aggregate contact number characteristics [ 20 , 21 ]. For contact force characteristics, the most common studies are statistical analysis of contact force, including contact force distribution characteristics [ 9 , 22 , 23 ] and contact force evolution characteristics in the compaction process [ 5 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

“…From the existing studies, it is found that the contact skeleton structure of asphalt mixture is the load transfer foundation, and the contact force and force chain characteristics can reflect load transfer mechanism of skeleton structure of asphalt mixtures. Meanwhile, massive research attention has been given to develop the evaluation parameters of load transfer mechanisms according to load transfer characteristics, such as contact number, contact chain structure, load-bearing contributions (based on average contact force), and force chains morphologies (force chains length, force chains angle, and force chains number) [ 5 , 16 , 21 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

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Review on Load Transfer Mechanisms of Asphalt Mixture Meso-Structure

Wang

Miao

et al. 2023

Materials

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Asphalt mixture is a skeleton filling system consisting of aggregate and asphalt binder. Its performance is directly affected by the internal load transfer mechanism of the skeleton filling system. It is significant to understand the load transfer mechanisms for asphalt mixture design and performance evaluation. The objective of this paper is to review the research progress of the asphalt mixture load transfer mechanism. Firstly, this paper summarizes the test methods used to investigate the load transfer mechanism of asphalt mixtures. Then, an overview of the characterization of load transfer mechanism from three aspects was provided. Next, the indicators capturing contact characteristics, contact force characteristics, and force chain characteristics were compared. Finally, the load transfer mechanism of asphalt mixtures under different loading conditions was discussed. Some recommendations and conclusions in terms of load transfer mechanism characterization and evaluation were given. The related work can provide valuable references for the study of the load transfer mechanism of asphalt mixtures.

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“…Given the significance of the dynamic modulus in the material and structural sense, a number of studies have been conducted to identify and understand the associated affecting factors, including temperature, loading frequency [ 5 , 6 , 7 ], air void [ 2 , 8 , 9 ], asphalt content and properties [ 10 , 11 ], as well as inter-particle contact and aggregate morphology [ 12 , 13 ], to name a few. The first three are generally considered to have major impacts on the stiffness behaviors of asphalt mixtures.…”

Section: Introductionmentioning

confidence: 99%

The Stiffness Behavior of Asphalt Mixtures with Different Compactness under Variable Confinement

et al. 2023

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The dynamic modulus is a key property determining the short- and long-term performance of asphalt pavement, and its strong dependence on confining pressure and material density (mixture compactness) has been clearly indicated in the literature. It is always challenging to reproduce three-dimensional in situ stress conditions in the laboratory. To alleviate this difficulty, in this study, a convenient experimental setup was developed, in which the lateral confinement was made present and variable as a concomitant reaction of the surrounding materials to the vertical loading. Three dense-graded mixtures were prepared to a set of four different densities and then subjected to the confined dynamic modulus test. The results indicated a significant dependence of the confined modulus on the three factors of temperature, frequency, and compactness and that the mixture with coarser gradation demonstrated a less sensitivity to these parameters. A mathematical model was developed for the dynamic modulus master curve unifying these factors by means of horizontal shifting due to the time–temperature superposition principle (validated against the variable confinement at different compactness) and the vertical shift factor as a function of reduced frequency and compactness. The adequacy of the model was demonstrated using the experimental data, and its potential application in field pavement compaction was discussed.

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Numerical study of the aggregate contact effect on the complex modulus of asphalt concrete

Cited by 19 publications

References 41 publications

Review on Design, Characterization, and Prediction of Performance for Asphalt Materials and Asphalt Pavement Using Multi-Scale Numerical Simulation

Review on Design, Characterization, and Prediction of Performance for Asphalt Materials and Asphalt Pavement Using Multi-Scale Numerical Simulation

Review on Load Transfer Mechanisms of Asphalt Mixture Meso-Structure

The Stiffness Behavior of Asphalt Mixtures with Different Compactness under Variable Confinement

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