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Advances in Alternative Asphalt and Pavement Materials: Design, Structure and Properties

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

Deadline for manuscript submissions: 10 August 2024 | Viewed by 994

Special Issue Editors


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Guest Editor
Department of Civil and Industrial Engineering (DICI), School of Engineering, University of Pisa, Pisa, Italy
Interests: alternative paving materials; rheological and numerical modeling; mechanical and performance properties of asphalt materials

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Guest Editor
Department of Civil Engineering, Aalto University, 02150 Espoo, Finland
Interests: alternative paving materials; microstructure and numerical modeling in pavement; mechanical property analysis and measurements; advanced materials and structures; failure analysis; fracture mechanics
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Special Issue Information

Dear Colleagues,

Nowadays, the need to improve the environmental sustainability of asphalt pavement has promoted a more inclusive concept of alternative paving materials and technologies for road applications. This family of solutions includes paving components such as binders (bio-binders, biomaterials, bio-oils, etc.), aggregates (construction and demolition wastes, reclaimed asphalt pavement, steel slags, artificial aggregates, plastics, etc.) and additives (asphalt recycling agent, rubber, plastic, fibers, recycled polymers, waxes, anti-stripping agents, etc.). Combining alternative paving materials with technologies such as warm, cold and foam mixing can enhance their sustainability benefits by reducing energy demand and emissions.

Alternative paving materials demand a novel approach to natively incorporate these materials into the design of paving composites to ensure their high performance and durability. For these new materials, the evaluation of the structure and microstructure of the mixture to understand its properties and behavior is crucial. At the same time, defining how the mix design can be integrated into the pavement design is essential.

This Special Issue covers various subjects related to the design, structure, and properties of alternative paving materials that can find applications in road engineering. Research on material characterization, laboratory and field performance, mix and pavement design and numerical modeling and aspects addressing safety, environment, sustainability, economics, society, equity and inclusion is welcome. Literature reviews and state-of-the-art contributions are also welcome, since they can provide a deep insight into the research that has already been conducted in the field and the future research needs. In addition, contributions to green and smart technology, as well as to methodologies for assessing sustainable development, are also encouraged.

Dr. Chiara Riccardi
Dr. Augusto Cannone Falchetto
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

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 binders
  • alternative paving components
  • balanced mix design
  • sustainable life cycle analysis
  • safety, equity and inclusion

Published Papers (2 papers)

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Research

18 pages, 5764 KiB  
Article
The Potential Risk of Nanoparticulate Release from Photocatalytic Pavement Concrete Surface Due to a Simulated Abrasion Load—An Experimental Study
by Hubert Witkowski, Janusz Jarosławski, Artur Szkop, Karol Chilmon, Maciej Kalinowski and Wioletta Jackiewicz-Rek
Materials 2024, 17(12), 3022; https://doi.org/10.3390/ma17123022 - 20 Jun 2024
Viewed by 253
Abstract
The risk of the releasing of nanometric particles from construction materials with nanometric components might be one of the biggest threats to further development of them. One of the possible ingress routes to human organisms is the respiratory system. Therefore, it is crucial [...] Read more.
The risk of the releasing of nanometric particles from construction materials with nanometric components might be one of the biggest threats to further development of them. One of the possible ingress routes to human organisms is the respiratory system. Therefore, it is crucial to determine the risk of emission of nanometric particles during material usage. In the presented paper, abrasion of mortar samples with nanometric TiO2 was investigated. A special abrasion test setup was developed to reflect everyday abrasion of the concrete surface of pavements. In the study, three TiO2-modifed mortar series (and respective reference series) underwent the developed test protocol and the grains were mobilized from their surface due to the applied load analyzed (granulation, morphology, and chemical composition). For a comparative analysis, an abrasion parameter was developed. Based on the obtained results, the modification of cementitious composites with nanometric TiO2 contributed to a reduction in the emission of aerosols and, therefore, confirmed the compatibility between TiO2 and cement matrix. Full article
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18 pages, 6413 KiB  
Article
Three-Dimensional Meso-Structure-Based Model for Evaluating the Complex Permittivity of Asphalt Concrete
by Zhenwen Xie, Xingzao Chen, Jing Wang and Jiaqi Chen
Materials 2024, 17(8), 1900; https://doi.org/10.3390/ma17081900 - 19 Apr 2024
Viewed by 405
Abstract
Microwave heating is an emerging alternative pretreatment method for road maintenance in cold seasons. The thermal behavior of asphalt pavement under microwave heating is mainly determined by the complex permittivity of the asphalt mixture. In this study, an innovative approach for calculating the [...] Read more.
Microwave heating is an emerging alternative pretreatment method for road maintenance in cold seasons. The thermal behavior of asphalt pavement under microwave heating is mainly determined by the complex permittivity of the asphalt mixture. In this study, an innovative approach for calculating the complex permittivity of an asphalt mixture based on a three-dimensional meso-scale heterogeneous structure was proposed. A series of experiments was conducted to verify the accuracy of this approach. The effect of porosity, void size, moisture content and aggregate gradation on the complex permittivity for an asphalt mixture were computationally analyzed based on the validated approach. Moreover, the applicability of commonly used classical dielectric models was analyzed. The classical Lichtenecker–Rother (LR) dielectric model was modified on the basis of simulation data for various conditions. The results showed that the real part of the complex permittivity decreased with the increase in porosity. Some sudden change in the imaginary part of the complex permittivity was observed within the frequency range from 2.6 GHz to 3.9 GHz. A larger air void size would lead to a larger frequency at which sudden change occurs. The real part and imaginary part of the complex permittivity tend to be smaller when more coarse aggregates are replaced with fine aggregates. Both the real part and the imaginary part of the complex permittivity increase with higher moisture content due to the stronger dielectric property of water. Each 1% increase in moisture content would lead to about a 3~4% increase in the real part of the complex permittivity. The determination coefficients R2 for the real part and the imaginary part of the complex permittivity fitted by the modified Brown model were the maximum values, which were 0.922 and 0.980, respectively. The method presented in this study is useful for transportation agencies to optimize microwave heating during winter maintenance. Full article
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