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Processes
Special Issues
Applications of Granular Materials in Industry and Environmental Contexts
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Applications of Granular Materials in Industry and Environmental Contexts

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Materials Processes".

Deadline for manuscript submissions: 31 October 2024 | Viewed by 4784

Special Issue Editors

Dr. Jianmin Ma

E-Mail Website
Guest Editor
Department of Chemistry, Queen’s University, Kingston, ON K7L 3N6, Canada
Interests: recycled asphalt pavement; bioasphalt; porous asphalt; solid waste
Dr. Mingjun Hu

E-Mail Website
Guest Editor
School of Transportation and Logistics, Dalian University of Technology, Dalian 116024, China
Interests: asphalt aging; recycled asphalt pavement; recycled concrete; porous asphalt pavement
Dr. Kejie Zhai

E-Mail Website
Guest Editor
School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China
Interests: FRP; concrete; engineering structure; underground pipelines

Special Issue Information

Dear Colleagues,

The Special Issue on "Applications of Granular Materials in Industry and Environment" focuses on exploring the diverse uses of granular materials in various industrial processes and environmental contexts. It delves into the practical applications, challenges, and advancements in utilizing granular materials across sectors.

This Special Issue aims to publish the recent advances in granular materials used in industries and engineering. Topics include, but are not limited to:

  • The preparation method of asphalt/cement concrete using solid waste;
  • The performance characterization of recycled asphalt/cement concrete;
  • The environmental impact analysis of solid waste;
  • The multiscale characterization of cracking resistance.

Dr. Jianmin Ma
Dr. Mingjun Hu
Dr. Kejie Zhai
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. Processes is an international peer-reviewed open access monthly 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 2400 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

  • recycled concrete aggregate in asphalt or cement concrete pavement
  • recycled aggregates in geotechnical applications
  • brick and ceramic production for civil engineering application
  • recycled asphalt pavement (RAP) and recycled asphalt shingle (RAS)
  • recycled plastics, including Polyethylene Terephthalate (PET), Polyethylene (PE), Polypropylene (PP), Polystyrene (PS), etc.

Published Papers (5 papers)

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Research

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20 pages, 6189 KiB  
Article
The Influence of the Application Layer of Pouring Semi-Flexible Pavement Material on Low-Temperature Stress
by Guoxun Li, Deyong Wang, Huaizhi Zhang, Biao Xu, Fan Yang and Zhen Zhang
Processes 2024, 12(2), 245; https://doi.org/10.3390/pr12020245 - 24 Jan 2024
Viewed by 534
Abstract
Pouring semi-flexible pavement material (PSFM) is widely used as a wearing layer material or below pavement due to its excellent resistance to deformation at high temperatures and under heavy loads. However, in cold regions, the material exhibits severe cracking issues. The primary objective [...] Read more.
Pouring semi-flexible pavement material (PSFM) is widely used as a wearing layer material or below pavement due to its excellent resistance to deformation at high temperatures and under heavy loads. However, in cold regions, the material exhibits severe cracking issues. The primary objective of this study is to enhance the resistance of pouring semi-flexible pavements (SFPs) to low-temperature cracking in cold regions by strategically designing pavement structures that incorporate PSFM. To achieve this goal, we conducted indoor tests to determine the relaxation modulus and temperature shrinkage coefficient of PSFM and simulated a pavement structure using COMSOL finite element simulation. The impacts of different application layers and layer thicknesses on low-temperature stresses were investigated based on these findings. The research findings indicate that when PSFM is used as the wearing layer material, the low-temperature stress is 4.7% lower than that of typical materials used in the pavement-wearing layer. When used as the binder layer material, the low-temperature stress on the wearing layer material increases by 3.5%. As the thickness of the wearing layer increases, the low-temperature stress within the pavement structure decreases, but the low-temperature stress on the pavement surface increases. Therefore, it is recommended to use PSFM as the binder layer material and appropriately increase the thickness of the wearing layer to enhance the pavement’s resistance to low-temperature cracking. Full article
(This article belongs to the Special Issue Applications of Granular Materials in Industry and Environmental Contexts)
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16 pages, 7246 KiB  
Article
Experimental Study on Mechanical Properties of Nano-Alumina-Modified Cement Composites Exposed to High Temperatures
by Man Wang, Yu Jiang, Shuaitao Liu, Zhaofan Chen and Haijian Su
Processes 2024, 12(1), 94; https://doi.org/10.3390/pr12010094 - 31 Dec 2023
Viewed by 784
Abstract
Due to improved mechanical properties, nano-alumina (NA) addition has been considered as an interesting method to promote the performance of cement composites. To investigate the enhancing effect of NA on the fire resistance of cement-based composites, the physical and mechanical properties of NA-modified [...] Read more.
Due to improved mechanical properties, nano-alumina (NA) addition has been considered as an interesting method to promote the performance of cement composites. To investigate the enhancing effect of NA on the fire resistance of cement-based composites, the physical and mechanical properties of NA-modified cement composites (NAMCCs) were experimentally measured after exposure to high temperatures (up to 800 °C). The variation mechanism of the physical properties of NAMCCs with increasing temperature was explored using X-ray diffraction (XRD) and scanning electron microscopy (SEM) methods. Increasing temperature leads to a gradual decrease in density and ultrasonic wave velocity but an overall increase in mass loss. The addition of NA particles effectively improved the mechanical properties of hardened cement pastes after heat treatment at all the temperatures studied. The compressive strength, elastic modulus and flexural strength all gradually decrease with increasing temperature. Combined with the changes in XRD and SEM, three regions are identified for the variation in mechanical performance in the temperature range of 20~400 °C, 400~600 °C and 600~800 °C. Finally, the relation between the physical and mechanical parameters of these regions was evaluated. Full article
(This article belongs to the Special Issue Applications of Granular Materials in Industry and Environmental Contexts)
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14 pages, 5459 KiB  
Article
Study on Assessment Method of Failure Pressure for Pipelines with Colony Corrosion Defects Based on Failure Location
by Hao Zhang, Mingming Sun, Jie Zhang, Yiming Zhang, Bin Li and Kejie Zhai
Processes 2023, 11(11), 3134; https://doi.org/10.3390/pr11113134 - 2 Nov 2023
Viewed by 838
Abstract
Evaluating the burst pressure of corrosion cluster defects necessitates considering the interaction of contiguous defects. The importance of this interaction cannot be emphasized enough, as it plays a crucial role in determining the failure pressure of such pipelines. Current methods for assessing the [...] Read more.
Evaluating the burst pressure of corrosion cluster defects necessitates considering the interaction of contiguous defects. The importance of this interaction cannot be emphasized enough, as it plays a crucial role in determining the failure pressure of such pipelines. Current methods for assessing the failure pressure of corrosion cluster defects have drawbacks, including complex evaluation procedures and limited applicability. In this research, the failure mode and location of corrosion clusters with two or more defects are studied with a burst experiment on a full-scaled pipeline. Based on the failure position of the corrosion cluster, a “center failure location” method is proposed to estimate the burst pressure of colony corrosion defects. The method takes the defect in the failure position as the center; the influence of contiguous defects that interact with the central defect on its failure pressure is considered, and subsequently, the burst pressure of colony corrosion centered on the failure location is evaluated. In contrast with the current assessment methods, while the proposed approach does not reduce prediction errors, it requires fewer evaluation conditions and is operationally simpler and more versatile. Full article
(This article belongs to the Special Issue Applications of Granular Materials in Industry and Environmental Contexts)
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25 pages, 8120 KiB  
Article
Investigation on the Performance of Fire and Smoke Suppressing Asphalt Materials for Tunnels
by Jiaquan Li, Fei Liu, Mingjun Hu, Changjun Zhou, Liujingyuan Su and Peng Cao
Processes 2023, 11(10), 3038; https://doi.org/10.3390/pr11103038 - 23 Oct 2023
Cited by 2 | Viewed by 898
Abstract
The volatilization of asphalt fumes not only affects the health of construction workers, but also damages the environment. It even affects the construction quality of asphalt pavement in tunnels. This article focuses on solving the emission of asphalt fumes to better protect human [...] Read more.
The volatilization of asphalt fumes not only affects the health of construction workers, but also damages the environment. It even affects the construction quality of asphalt pavement in tunnels. This article focuses on solving the emission of asphalt fumes to better protect human health and the environment, while satisfying the use of asphalt pavement. A flame retardant and smoke suppressant (compound) with Mg(OH)2 as the main component was developed, and flame retardant asphalt mixture and asphalt mastics were prepared to evaluate the flame retardant and smoke suppressant properties and performance effects. Firstly, its low- and high-temperature performances were investigated with BBR and DSR, respectively. Then, the indoor combustion test and the cone calorimeter test were used to evaluate the fire retardant smoke suppression effect of the asphalt mastic. Thirdly, the flame retardant effect of asphalt mastic mixed with the compound was further analyzed by the TG test and SEM. The pyrolysis temperature, mass loss, and microscopic state of the asphalt surface were used to verify and explain the flame retardant reaction effect and process of the compound. Finally, the asphalt mixture performance was evaluated, as well as the flame retardant smoke suppression effect by asphalt mixture combustion tests. The results showed that the flame retardant smoke suppression time of the flame retardant asphalt mixture was reduced by 66%, and the smoke emission area was reduced by 20%. The flame retardant smoke suppression effect of the asphalt mixture was improved by 44%. It is proven that this kind of fire retardant and smoke suppressing asphalt mastic and mixture met performance needs in use, and the fire retardant and smoke suppressing effect was obvious. This solution addresses the issue of asphalt smoke generated during the construction of asphalt pavement, providing better support for the construction of asphalt pavement in tunnels. Full article
(This article belongs to the Special Issue Applications of Granular Materials in Industry and Environmental Contexts)
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Review

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24 pages, 2999 KiB  
Review
The Progress of the Interfacial Diffusion between Virgin and Aged Asphalt Based on Molecular Dynamics Simulation: A Review
by Yanhai Yang, Chonghua Wang and Ye Yang
Processes 2023, 11(10), 3024; https://doi.org/10.3390/pr11103024 - 20 Oct 2023
Cited by 1 | Viewed by 1198
Abstract
The utilization rate of reclaimed asphalt pavement is significantly low in the sustainable design process of asphalt roads. Numerous researchers have extensively investigated the recycling and utilization of reclaimed asphalt pavements from various perspectives. Molecular dynamics simulations could elucidate the diffusion phenomenon occurring [...] Read more.
The utilization rate of reclaimed asphalt pavement is significantly low in the sustainable design process of asphalt roads. Numerous researchers have extensively investigated the recycling and utilization of reclaimed asphalt pavements from various perspectives. Molecular dynamics simulations could elucidate the diffusion phenomenon occurring at the molecular scale between virgin and aged asphalt interfaces. This review provides a comprehensive summary of the simulation methods and applications of molecular dynamics simulation in the interface diffusion problem between virgin and aged asphalt. Diffusion theory and model testing methods are discussed. The review proposes the basic steps of molecular dynamics simulation and summarizes the molecular models with the corresponding parameter settings of virgin asphalt and aged asphalt. Moreover, the current influencing factors on the interfacial diffusion problem of virgin and aged asphalt are discussed. The paper explores the validation parameters including density, viscosity, radial distribution function (RDF), glass transition temperature, and solubility parameters based on the existing research. Molecular dynamics simulation could simulate interface diffusion at a micro-scale and clarify the diffusion depth and influence range of different asphalts. The purpose of the study of molecular dynamics is to solve interface issues and advance optimization of reclaimed materials. Full article
(This article belongs to the Special Issue Applications of Granular Materials in Industry and Environmental Contexts)
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