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Advanced Asphalt Materials and Characterization/Simulation Technologies

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Construction and Building Materials".

Deadline for manuscript submissions: 20 November 2025 | Viewed by 436

Special Issue Editors


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Guest Editor
Road Engineering Department, School of Civil Engineering, Central South University, Changsha 410075, China
Interests: asphalt aging and rejuvenation; multiscale experimental characterization; molecular computational modeling; nonlinear material behaviors
Special Issues, Collections and Topics in MDPI journals

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Guest Editor Assistant
Department of Civil Engineering, Montana Technological University, Butte, MT 59701, USA
Interests: big data analysis and artificial intelligence; pavement materials; finite element methods

Special Issue Information

Dear Colleagues,

The durability and sustainability of asphalt pavements under environmental weathering and trafficking remain critical challenges in modern road infrastructure. Asphalt mixtures are generally susceptible to component degradation (e.g., asphalt oxidation and aggregate crushing), binder-aggregate interfacial weakening (due to moisture penetration), and mesostructural deterioration (as a result of cracking/rutting). This Special Issue addresses these limitations by focusing on cutting-edge advancements in alternative asphalt binders and aggregates, asphalt oxidation mechanisms and rejuvenation pathways, and multiscale characterization/simulation technologies.

Recent innovations in modifiers and recycling agents aim to enhance pavement lifespans and reduce environmental impacts. Meanwhile, multiscale characterizations—from molecular dynamics to finite/discrete element analysis—offer unprecedented insights into material behavior, enabling tailored design for performance optimization. Cutting-edge numerical simulations further bridge experimental gaps, predicting pavement responses under real-world traffic and environmental conditions.

This Special Issue brings together interdisciplinary research to advance sustainable pavement solutions and our multiphysical understanding of this process. Contributions may include, but are not limited to, studies on the following topics:

  • Novel binder formulations for improved resistance to aging, cracking, and moisture damage;
  • Mechanisms of asphalt oxidation and rejuvenation strategies;
  • Multiscale modeling approaches for predicting material properties and performance;
  • Synergistic applications of advanced characterization and simulation tools.

By integrating fundamental science with practical engineering, this collection will guide pavement engineers, material scientists, and policymakers toward next-generation sustainable road infrastructure.

Prof. Dr. Wei Cao
Guest Editor

Dr. Yilong Liu
Guest Editor Assistant

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • alternative asphalt binders and aggregates
  • asphalt oxidation and rejuvenation
  • multiscale characterizations
  • numerical simulations

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Published Papers (1 paper)

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Research

25 pages, 8938 KiB  
Article
Mesoscopic Perspective into the High-Temperature Triaxial Dilation of Asphalt Mixtures via PFC–FLAC Coupled Simulation
by Bin Xiao, Wei Cao and Liang Zhou
Materials 2025, 18(8), 1722; https://doi.org/10.3390/ma18081722 - 9 Apr 2025
Viewed by 377
Abstract
The high-temperature rutting performance of asphalt mixtures is strongly dependent on the aggregate skeleton and particle movement under loading. Such mechanisms were addressed in the present study by a combined experimental and simulation approach based on the triaxial strength test. A single type [...] Read more.
The high-temperature rutting performance of asphalt mixtures is strongly dependent on the aggregate skeleton and particle movement under loading. Such mechanisms were addressed in the present study by a combined experimental and simulation approach based on the triaxial strength test. A single type of asphalt with two different aggregate gradations (dense and gap) was incorporated to highlight the role of gradation in resisting shear dilation. The simulation was carried out by coupling the discrete and finite element methods considering the realistic three-dimensional aggregate shapes and gradations as well as the flexible boundary prescribed by latex membranes as routinely employed in triaxial testing. In order to represent contact failure-induced cracks within the virtual specimens, the linear parallel bond model was mixed with the Burgers or linear model through random distribution at contacts involving the mortar units. Model verification was achieved by comparing the resulting stress–strain data against those from the laboratory. The calibrated model provided a platform for systematic investigation from the perspectives of particle movement, crack development and distribution, and interparticle contacts. The results showed that the gap-graded mixture yielded lower triaxial strengths and yet softened at a lower rate and exhibited smaller volumetric expansion in the post-peak region. A faster loss of internal cohesion was inferred in the dense-graded mixture based on the higher accumulation rate of cracks that were concentrated at the middle height towards the perimeter of the virtual specimen. Contact analysis indicated that aggregate skeleton was more influential in the strength and stability of gap-graded mixtures. Full article
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