Special Issue "Novel Materials and Technologies for the Urban Roads of the Future"

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 30 April 2020.

Special Issue Editors

Prof. Cesare Sangiorgi
Website
Guest Editor
Department of Civil, Chemical, Environmental, and Materials Engineering; University of Bologna; Italy
Interests: pavements; bituminous materials; recyled materials; smart materials
Special Issues and Collections in MDPI journals
Prof. Daniel Castro-Fresno
Website
Guest Editor
Department of Transportation, Projects, and Processes Technology (GITECO); University of Cantabria; Spain
Interests: materials; pavements; numerical simulation; bitumen rehology
Dr. Piergiorgio Tataranni
Website
Guest Editor
Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Italy
Interests: recyled materials; alkali-activated materials; bituminous materials; pavements

Special Issue Information

Dear Colleagues,

Growing unsustainable urbanization and intensified land-use are generating new urban scenarios for the built environment and causing the urgent need for novel and synergic approaches to the design, construction, and maintenance of existing and new urban road pavements. The development of sustainable, durable, smart, and functional materials is the new challenge that researchers all over the world are facing in order to tackle the aforementioned needs. Paving solutions for the urban roads of the future must have consistent properties, balancing the production and maintenance costs, as suggested by the circular economy concept, without jeopardizing the service performances.

This Special Issue entitled Novel Materials and Technologies for the Urban Roads of the Future will present the latest trends of research in the pavement engineering sector, focusing on the development of innovative materials and technologies for the conception of a new urban environment. The editors welcome the submission of high-quality research, technical papers, review contributions, and case histories on laboratory and in-situ applications. Papers for this Special Issue will be selected via a rigorous peer-review procedure with the aim of the rapid and wide dissemination of research results.

Prof. Cesare Sangiorgi
Prof. Daniel Castro-Fresno
Dr. Piergiorgio Tataranni
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 papers will be 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 2000 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

  • Urban roads
  • Novel paving materials
  • Sustainable solutions
  • Pavement maintenance
  • Civil engineering

Published Papers (5 papers)

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Research

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Open AccessArticle
Effect of Synthetic Fibers and Hydrated Lime in Porous Asphalt Mixture Using Multi-Criteria Decision-Making Techniques
Materials 2020, 13(3), 675; https://doi.org/10.3390/ma13030675 - 03 Feb 2020
Abstract
Porous asphalt is a type of mixture characterized by having high air void percentages that offers multiple benefits when used in wearing courses in terms of driving safety, water flow management, and noise reduction. However, the durability of porous asphalt (PA) mixtures is [...] Read more.
Porous asphalt is a type of mixture characterized by having high air void percentages that offers multiple benefits when used in wearing courses in terms of driving safety, water flow management, and noise reduction. However, the durability of porous asphalt (PA) mixtures is significantly shorter when compared to dense-graded asphalt mixtures. This study investigated the impact of polyolefin–aramid fibers and hydrated lime in the functional and mechanical performance of porous asphalt mixtures. A parametric study based on the concept of design of experiments was carried out through the Taguchi methodology. Accordingly, an experimental design was conducted based on the L18 full factorial orthogonal array. Three control factors—fiber content, binder content, and filler type—were included at various levels, and multiple responses including total air voids, interconnected air voids, particle loss in dry conditions, particle loss in wet conditions, and binder drainage were assessed experimentally. Signal-to-noise ratios were calculated to determine the optimal solution levels for each control factor for the multiple responses. In the second phase of the research, multi-criteria decision-making techniques—namely, criteria importance through inter-criteria correlation and weighted aggregated sum product assessment—were used to transform the multiple-response optimization problem into a single-unique optimization problem and to elaborate a preference ranking among all the mixture designs. The most significant levels for acquiring the optimum overall response value were found to be 0.05% for fiber content and 5.00% for binder content and mixed filler with hydrated lime. Full article
(This article belongs to the Special Issue Novel Materials and Technologies for the Urban Roads of the Future)
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Open AccessArticle
The Influence of Alternative Fillers on the Adhesive Properties of Mastics Fabricated with Red Mud
Materials 2020, 13(2), 484; https://doi.org/10.3390/ma13020484 - 19 Jan 2020
Abstract
The adhesion between bitumen and aggregates strongly influences the lifetime of pavements. To improve adhesiveness, the road construction industry has been using additives to alter the interfacial energy and improve the affinity of materials in the presence of water. However, the water sensitivity [...] Read more.
The adhesion between bitumen and aggregates strongly influences the lifetime of pavements. To improve adhesiveness, the road construction industry has been using additives to alter the interfacial energy and improve the affinity of materials in the presence of water. However, the water sensitivity varies according to the mixture design, since the interaction may occur differently depending on the materials chosen. As the use of alternative materials is increasing in road constructions, further analysis of its affinity with aggregates and bitumen is necessary. In that sense, this study evaluates the adhesion performance of mastics mixed with traditional fillers, such as limestone and dolomite, and residues, such as fly ash and red mud. To assess possible interactions with the red mud, the fillers are mixed in distinct percentages and tested for adhesiveness, wettability, penetration, and softening point. The results show the importance of hydrophilicity, asphalt viscosity, and physical–chemical properties to define adhesive interactions. Full article
(This article belongs to the Special Issue Novel Materials and Technologies for the Urban Roads of the Future)
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Open AccessArticle
Multi-Response Optimization of Porous Asphalt Mixtures Reinforced with Aramid and Polyolefin Fibers Employing the CRITIC-TOPSIS Based on Taguchi Methodology
Materials 2019, 12(22), 3789; https://doi.org/10.3390/ma12223789 - 18 Nov 2019
Cited by 1
Abstract
For the optimum design of a Porous Asphalt (PA) mixture, different requirements in terms of functionality and durability have to be fulfilled. In this research, the influence of different control factors such as binder type, fiber content, and binder content were statistically investigated [...] Read more.
For the optimum design of a Porous Asphalt (PA) mixture, different requirements in terms of functionality and durability have to be fulfilled. In this research, the influence of different control factors such as binder type, fiber content, and binder content were statistically investigated in terms of multiple responses such as total air voids, interconnected air voids, particle loss in dry conditions, particle loss in wet conditions, and binder drainage. The experiments were conducted based on a Taguchi L18 orthogonal array. The best parametric combination per each response was analyzed through signal to noise ratio values. Multiple regression models were employed to predict the responses of the experiments. As more than one response is obtained, a multi-objective optimization was performed by employing Criteria Importance through Criteria Inter-Correlation (CRITIC) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) methodologies. The weights for the selection of the functional and mechanical performance criteria were derived from the CRITIC approach, whereas the ranking of the different experiments was obtained through the TOPSIS technique. According to the CRITIC-TOPSIS based Taguchi methodology, the optimal multiple-response was obtained for a polymer modified binder (PMB) with fiber and binder contents of 0.15% and 5.0%, respectively. In addition, good results were obtained when using a conventional 50/70 penetration grade binder with a 5.0% binder content and 0.05% fiber content. Full article
(This article belongs to the Special Issue Novel Materials and Technologies for the Urban Roads of the Future)
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Open AccessArticle
Proposal of a New Porous Concrete Dosage Methodology for Pavements
Materials 2019, 12(19), 3100; https://doi.org/10.3390/ma12193100 - 23 Sep 2019
Cited by 1
Abstract
Although porous concrete pavement design methods are mainly focused on maintaining high permeability rates in order to improve their ability to manage stormwater runoff, the mixture strength is paramount for its durability and service life. This paper proposes a new mixture design method [...] Read more.
Although porous concrete pavement design methods are mainly focused on maintaining high permeability rates in order to improve their ability to manage stormwater runoff, the mixture strength is paramount for its durability and service life. This paper proposes a new mixture design method for porous concrete, named PCD (porous concrete design), derived from the ACI 522R-10 and ACI 211.3R-02 standards. The aim is to improve mechanical strength in porous concrete mixtures, while ensuring enough permeability for its use in urban roads. With PCD methodology it is possible to obtain mechanical strengths 30% higher than those produced with ACI methodologies, while maintaining permeability rates close to 2 cm/s, lower than those obtained with ACI methods but still enough to manage extreme storm events. Finally, with the analytical Hierarchy Process (AHP) multi-criteria decision-making methodology and also bearing in mind safety variables, the best porous concrete mixtures are the ones produced with PCD methodology. Full article
(This article belongs to the Special Issue Novel Materials and Technologies for the Urban Roads of the Future)
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Review

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Open AccessReview
Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review
Materials 2019, 12(19), 3156; https://doi.org/10.3390/ma12193156 - 27 Sep 2019
Cited by 2
Abstract
Despite the numerous benefits for preserving the hydrological cycle, permeable pavement systems (PPSs) found their major application in parking spots and for light traffic scenarios due to their limited durability and strength. To make the PPSs suitable for heavy traffic conditions without significant [...] Read more.
Despite the numerous benefits for preserving the hydrological cycle, permeable pavement systems (PPSs) found their major application in parking spots and for light traffic scenarios due to their limited durability and strength. To make the PPSs suitable for heavy traffic conditions without significant distresses, research is shifting toward the adoption of novel binders and additives for designing multifunctional porous asphalt mixtures which make up the surface course of PPSs. Certain additives are well known for enhancing the durability of dense graded asphalt mixtures and improving fatigue and rutting resistance. However, the studies on the influence of additives on abrasion resistance and binder draindown, which are the common problems in porous asphalt mixtures (PAMs), are still not well established. This paper summarizes best practices performed on PAMs and recommends possible future research directions for its improvement. Particular emphasis is placed on strength and resilience of PAMs by incorporating additives like nanosilica, crumb rubber, warm-mix additives, fibers (such as cellulose, glass, steel, and synthetic fibers), and some eco-friendly materials. It was found that different additives seem to have different effects on the properties of PAMs. Moreover, the combination of additives has synergistic benefits for the performance of PAMs, especially in urban pavements. Full article
(This article belongs to the Special Issue Novel Materials and Technologies for the Urban Roads of the Future)
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