Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Construction Materials
Special Issues
Advances in Materials and Recycling Technologies for Sustainable Road Pavements
share announcement

Advances in Materials and Recycling Technologies for Sustainable Road Pavements

A special issue of Construction Materials (ISSN 2673-7108).

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 11623

Special Issue Editors

Dr. Giovanni Giacomello

E-Mail Website
Guest Editor
Department of Civil, Environmental and Architectural Engineering, University of Padova, Padova, Italy
Interests: rheological–physical–mechanical characterization of bitumen, bituminous mixtures (hot mix asphalt, cold mix asphalt, warm mix asphalt, etc.) and cement-bound mixtures for road and airport infrastructure; aggregates and materials, even unconventional ones, for road, railway and airport infrastructure; road pavements for concrete bridge decks; the design, construction and maintenance of railway infrastructure; road safety; Life Cycle Assessment applied to the design, construction and maintenance of transport infrastructures; Building Information Modeling applied to transport infrastructures (I-BIM)
Special Issues, Collections and Topics in MDPI journals
Dr. Andrea Baliello

E-Mail Website
Guest Editor
Department of Civil, Environmental and Architectural Engineering, University of Padova, Padova, Italy
Interests: road materials; pavement engineering; road egineering; road infrastructures; railways; airports
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Recycling applied to asphalt pavement is extremely topical and is gaining even more interest because of growing attention about environmental preservation and sustainability.

In fact, recycling implies tangible benefits connected to the saving of natural resources and the reduction in wastes disposal; it also allows a secondary life to by-products, thus limiting the costs associated with the construction.

Recycling on road pavements, in particular within asphalt concretes, is a well-known practice that has already been debated for decades; however, this area still requires further scientific study in view of the new challenges brought by the recent technological applications on roads and linked to related in-service issues (traffic increase, heavier vehicles, climate changes, etc.).

The aim of this Special Issue is to present an analysis of innovative recycling techniques and materials to design and construct sustainable road pavements.

Dr. Giovanni Giacomello
Dr. Andrea Baliello
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. Construction Materials is an international peer-reviewed open access quarterly 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 1000 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

  • Road pavements
  • Road materials
  • Pavement engineering
  • Recycling technology
  • Recycling materials
  • Waste and by-product
  • Innovative recycling
  • Secondary recycling
  • Multiple material reuse.

Published Papers (5 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

15 pages, 4013 KiB  
Article
Evaluating the Influence of Waste Cooking Oil Molecular Structure on Aged Asphalt Modification
by Qiuhao Chang, Liangliang Huang and Yuting Wu
Constr. Mater. 2023, 3(4), 543-557; https://doi.org/10.3390/constrmater3040034 - 06 Dec 2023
Cited by 1 | Viewed by 775
Abstract
Recycling aged asphalt pavement has become increasingly important due to its environmental and economic advantages. Asphalt, serving as the binding agent for aggregates, plays a crucial role in pavement integrity. The deterioration of asphalt binder properties upon aging poses a significant challenge to [...] Read more.
Recycling aged asphalt pavement has become increasingly important due to its environmental and economic advantages. Asphalt, serving as the binding agent for aggregates, plays a crucial role in pavement integrity. The deterioration of asphalt binder properties upon aging poses a significant challenge to asphalt pavement recycling. Consequently, various rejuvenators have been developed to restore aged asphalt binder properties and facilitate pavement reclamation. Waste cooking oil (WCO) is a widely used rejuvenator that mitigates the high viscosity and brittleness of aged asphalt, preventing cracking. WCO consists of triglycerides (TG) and free fatty acids (FFA), each with distinct molecular structures. In this study, molecular dynamics simulations were employed to investigate the individual effects of 10 wt.% TG and FFA on the viscosity, self-diffusion, and microstructure of aged asphalt at 1 atm and 404 K. The results demonstrate that both TG and FFA can reduce the viscosity of aged asphalt, albeit through different mechanisms. TG and FFA, characterized by high molecular mobility when dispersed in aged asphalt, enhance its mobility and reduce its viscosity. Additionally, TG effectively disrupts preferential interactions among asphaltenes, preventing their self-aggregation. In contrast, FFA has a limited impact on reducing these interactions. Furthermore, the study delves into the entanglement behaviors of FFA and TG with varying chain lengths within aged asphalt. Shorter chain lengths, as opposed to longer ones, exhibit a lower likelihood of entanglement with other asphalt molecules, resulting in increased molecular mobility and reduced asphalt viscosity. The fundamental insights gained from this research serve as a valuable reference for the application of waste cooking oil in the recycling of aged asphalt pavement. By shedding light on underlying molecular dynamics, this study contributes to the development of more effective and sustainable approaches to asphalt recycling. Full article
(This article belongs to the Special Issue Advances in Materials and Recycling Technologies for Sustainable Road Pavements)
►▼ Show Figures

Figure 1

17 pages, 6250 KiB  
Article
Geotechnical Properties of Soil Stabilized with Blended Binders for Sustainable Road Base Applications
by Per Lindh and Polina Lemenkova
Constr. Mater. 2023, 3(1), 110-126; https://doi.org/10.3390/constrmater3010008 - 12 Mar 2023
Cited by 1 | Viewed by 2772
Abstract
This study aimed at evaluating the effect of blended binders on the stabilization of clayey soils intended for use as road and pavement materials in selected regions of Sweden. The stabilization potential of blended binders containing five stabilizers (cement, bio fly ash, energy [...] Read more.
This study aimed at evaluating the effect of blended binders on the stabilization of clayey soils intended for use as road and pavement materials in selected regions of Sweden. The stabilization potential of blended binders containing five stabilizers (cement, bio fly ash, energy fly ash, slag and lime) was investigated using laboratory tests and statistical analysis. Soil samples were compacted using Swedish Standards on UCS. The specimens were stabilized with blended mixtures containing various ratios of five binders. The effects of changed ratio of binders on soil strength was analyzed using velocities of seismic P-waves penetrating the tested soil samples on the day 14 of the experiment. The difference in the soil surface response indicated variations in strength in the evaluated specimens. We tested combination of blended binders to improve the stabilization of clayey soil. The mix of slag/lime or slag/cement accelerated soil hardening process and gave durable soil product. We noted that pure lime (burnt or quenched) is best suited for the fine-grained soils containing clay minerals. Slag used in this study had a very finely ground structure and had hydraulic properties (hardens under water) without activation. Therefore, slag has a too slow curing process for it to be practical to use in real projects on stabilization of roads. The best performance on soil stabilization was demonstrated by blended binders consisted of lime/fly ash/cement which considerably improved the geotechnical properties and workability of soil and increased its strength. We conclude that bearing capacities of soil intended for road construction can be significantly improved by stabilization using mixed binders, compared to pure binders (cement). Full article
(This article belongs to the Special Issue Advances in Materials and Recycling Technologies for Sustainable Road Pavements)
►▼ Show Figures

Figure 1

17 pages, 5020 KiB  
Article
Laboratory Assessment of Modified Asphalt Binders Using Crumb Rubber Modifier (CRM) and Processed Oil
by Navid Hemmati, Shyaamkrishnan Vigneswaran, Mithil Mazumder, Moon-Sup Lee and Soon-Jae Lee
Constr. Mater. 2023, 3(1), 93-109; https://doi.org/10.3390/constrmater3010007 - 08 Mar 2023
Viewed by 1313
Abstract
The study examines the effects of modifying PG 64-22 asphalt binder with Crumb Rubber Modifier (CRM) and processed oil on its properties. The binder was tested at different temperatures, and different amounts of CRM and processed oil were added to the binder. The [...] Read more.
The study examines the effects of modifying PG 64-22 asphalt binder with Crumb Rubber Modifier (CRM) and processed oil on its properties. The binder was tested at different temperatures, and different amounts of CRM and processed oil were added to the binder. The modified binders were also aged using different procedures. The study found that adding processed oil to CRM-modified binders reduces viscosity and improves workability, while CRM improves the rutting resistance. However, the addition of processed oil reduces the binder’s rutting performance. The study also found that CRM and processed oil improve the low temperature cracking resistance. The study’s results indicate that co-modifying CRM binders with processed oil resulted in a significant reduction in viscosity values, resulting in improved workability. The results also showed that increasing the processed oil concentration from 6% to 12% caused a viscosity reduction of 27%, 34%, 33%, and 31% for modified binders containing 0, 5%, 10%, and 15% CRM, respectively. Even though the addition of processed oil results in a reduction in the rutting performance of asphalt binder, the addition of CRM significantly improved the rutting resistance of asphalt binders. The CRM binder containing processed oil decreased the G*sin δ values, and the content of 6% processed oil containing 5%, 10%, and 15% CRM decreased by 28%, 17%, and 11%, respectively, while the 12% processed oil-modified asphalt binder showed a reduction in G*sin δ by 5%, 13%, and 22%, respectively. The BBR results for modified asphalt binders showed that the incorporation of CRM and processed oil improved the low temperature cracking resistance significantly. The stiffness values with 6% processed oil containing 5%, 10%, and 15% CRM were observed to be 118, 97, and 80 MPa, respectively, while at the same temperature for the same CRM contents with 12% processed oil, the stiffness values were found to be 89, 72, and 56 MPa, respectively. Full article
(This article belongs to the Special Issue Advances in Materials and Recycling Technologies for Sustainable Road Pavements)
►▼ Show Figures

Figure 1

19 pages, 1683 KiB  
Article
An Index for Assessing the Environmental Impact of Pavement Maintenance Operations on the Motorway Network: The Environmental Asphalt Rating
by Davide Chiola, Vincenzo Cirimele and Cristina Tozzo
Constr. Mater. 2023, 3(1), 62-80; https://doi.org/10.3390/constrmater3010005 - 04 Feb 2023
Cited by 2 | Viewed by 2620
Abstract
In recent years, attention on pavement management is increasing and the research is focused on the development of innovative protocols and comparative evaluation of maintenance alternatives. Among these, the concept of sustainability related to the management of pavements is gaining ground and, more [...] Read more.
In recent years, attention on pavement management is increasing and the research is focused on the development of innovative protocols and comparative evaluation of maintenance alternatives. Among these, the concept of sustainability related to the management of pavements is gaining ground and, more generally, infrastructure and the quantification of environmental impact as a combination of emissions and energy consumption. To properly estimate the environmental impact of different pavement interventions, a calculation methodology is presented in this paper that can summarize all the different aspects of environmental impact for both the production and paving phases of asphalt mixtures. The innovative approach takes into account also the need to evaluate new methodologies and new production processes in order to compare these new technologies with already used materials and processes. The result of this paper is a dimensionless index based on Environmental Product Declaration (EPD) certification which has been named Environmental Asphalt Rating (EAR) with weighting factors and performance coefficients fine-tuned on the European scenario. The EAR computation wants to be a certified procedure ensuring the repeatability and the quality of the environmental evaluation but also able to include in the evaluation noise and mechanical characteristics of the pavement. Several applications are expected such as the design stage of maintenance operations, and awarding criteria in tenders of monitoring phases of the pavement maintenance interventions. Full article
(This article belongs to the Special Issue Advances in Materials and Recycling Technologies for Sustainable Road Pavements)
►▼ Show Figures

Figure 1

16 pages, 8402 KiB  
Article
Technical Approaches to the Recycling of Reclaimed Asphalt Pavement into Aggregate and Binder
by Kengo Akatsu, Yousuke Kanou and Shouichi Akiba
Constr. Mater. 2022, 2(2), 85-100; https://doi.org/10.3390/constrmater2020007 - 04 May 2022
Viewed by 2579
Abstract
Approximately 99% of reclaimed asphalt pavement (RAP) has been recycled in Japan in recent years. However, the deterioration in quality of repeatedly recycled RAP cannot be prevented through existing methods, nor can sustainability be guaranteed. In addition, it is challenging to procure virgin [...] Read more.
Approximately 99% of reclaimed asphalt pavement (RAP) has been recycled in Japan in recent years. However, the deterioration in quality of repeatedly recycled RAP cannot be prevented through existing methods, nor can sustainability be guaranteed. In addition, it is challenging to procure virgin aggregate and binder. Therefore, to ensure the quality and supply of future recycled hot-mix asphalt, it is necessary to explore sustainable recycling technologies. This study examined the advantages and disadvantages of the technical approaches to the recycling of RAP into aggregate and binder. We develop a recycling technology (separate recycling technologies) that uses hot water to separate and restore aggregate and binders to their initial condition from RAPs. The quality of the aggregate, recovered by the hot water rubbing method at 80 °C and 90 °C, fully satisfies the standard values for virgin aggregate at all temperatures. The aged binders, reacting through a hydrothermal decomposition method (hydropyrolysis), with a reaction temperature of 300–350 °C and a reaction time of 0–15 min, tend to have a significantly improved effect. These results confirm that both the hydrothermal rubbing and hydropyrolysis methods could be beneficial options for establishing separate recycling technologies for RAP. Full article
(This article belongs to the Special Issue Advances in Materials and Recycling Technologies for Sustainable Road Pavements)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-5
Back to TopTop