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Applications of Natural and Synthetic Coatings in Environmental, Geological, Geophysical,...
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Applications of Natural and Synthetic Coatings in Environmental, Geological, Geophysical, and Energy Engineering: The State of the Art

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 6557

Special Issue Editor

Dr. Kostas Senetakis

E-Mail Website
Guest Editor
Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China
Interests: experimental and multi-scale mechanics; geomechanics; tribology and contact mechanics; material characterization, geo-energy and geo-resources; natural, polymer and biopolymer-based coatings; surfaces and interfaces; polymeric-based materials; cementitious materials; impact mechanics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

There has been an increased interest in the scientific study of natural and synthetic (industrial-based) coatings in earth materials encountering various disciplines of research, such as earth science and geophysics, tribology, engineering, and environmental science. Natural coatings are found in an extraordinary range of forms, from filling materials in rock gouges and faults, to siliciclastic-based microparticles and debris produced due to geological processes/abrasion and iron–oxide compounds developed on earth materials significantly affecting the behavior of earth and multiphase systems in a wide range of scales. Developments of synthetic coatings to be used in earth systems serve different purposes, for example, ground treatment, stabilization, and enhancement of the behavior of slopes, tailing dams, and railway ballast, geo-environmental and water-ecosystem protection, as well as applications in hydraulic fracturing technologies. The interactions of coatings with earth materials therefore comprise an emerging area of research of multidisciplinary interest from both scientists and industries.

This Special Issue serves as a platform to report recent scientific studies and state-of-the-art works in the broader area of natural and synthetic coatings in relation to earth materials. New original research works, review papers with emphasis on the state of the art, and preliminary studies which report promising results in the area in the form of technical notes/short communications are encouraged.

In particular, the topics of interest include but are not limited to:

  • Natural coatings of earth systems: Development, simulation, multiscale, and multiphase studies.
  • Rock mechanics, fault mechanics, and geophysical studies with emphasis on the influence of fillings/gouges.
  • Studies of coatings and bonding/cementation in geomechanics with emphasis in experimentation, constitutive modeling, and applications of coatings for earth materials.
  • Enhancement/treatment of earth materials and systems (for example, slopes, tailing dams, ballast, foundations) with natural/synthetic coatings.
  • Hydraulic fracturing technologies with emphasis on the influence of coatings on rock–proppant–fluid interaction.
  • Methane–hydrate-bearing sediments and other energy and resource engineering applications.
  • Protection of water ecosystems using natural–synthetic coatings.
  • Polymer and biopolymer-based coatings: Applications in science and engineering.
  • Development of new coating/bonding technologies in relation to earth materials and ecosystem/water protection/treatment.
  • Influence of coating development of earth materials on the response of infrastructures.
  • Chemical, biological, and physical analyses of natural and synthetic coatings in relation to applications in earth materials and environmental/ecological systems.

Dr. Kostas Senetakis
Guest Editor

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. Coatings 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 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

  • gouges
  • rock mechanics
  • fault mechanics
  • geophysics
  • geoscience
  • rock weathering
  • diagenesis
  • engineering geology
  • petroleum engineering
  • environmental engineering
  • hydraulic fracturing
  • methane–hydrate-bearing sediments
  • ballast
  • natural coatings
  • polymer coatings
  • biopolymer coatings
  • bonding/cementation
  • mechanics
  • interfaces
  • tribology
  • ground treatment
  • water treatment
  • ecosystems

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

14 pages, 10872 KiB  
Article
Effect of Binder Coatings on the Fracture Behavior of Polymer–Crystal Composite Particles Using the Discrete Element Method
by Huabin Wang, Jianmei Li, Gaoyang Hu, Bo Zhou and Yuchen Guo
Coatings 2021, 11(9), 1075; https://doi.org/10.3390/coatings11091075 - 6 Sep 2021
Cited by 4 | Viewed by 2269
Abstract
Polymer–crystal composite particles formed by crystals coated with binders are widely used in the fields of medicine, energy, the chemical industry, and civil engineering. Binder content is an important factor in determining the mechanical behavior of composite particles. Therefore, this study aimed to [...] Read more.
Polymer–crystal composite particles formed by crystals coated with binders are widely used in the fields of medicine, energy, the chemical industry, and civil engineering. Binder content is an important factor in determining the mechanical behavior of composite particles. Therefore, this study aimed to investigate the underlying effect of binder coatings in the fracture micromechanics of polymer–crystal composite particles using the discrete element method (DEM). To achieve this objective, realistic particle and crystal shapes were first obtained and reconstructed based on X-ray micro-computed tomography (μCT) scanning and scanning electron microscope (SEM) images. A series of single particle crushing tests and DEM simulations were conducted on real and reconstructed polymer–crystal composite particles, respectively. Based on the experimental and DEM results, the effect of binder coatings on the crushing strength and crushing patterns of polymer–crystal composite particles was measured. Moreover, the micromechanics of the development and distribution of microcracks was further investigated to reveal the mechanism by which binder coatings affect polymer–crystal composite particles. Full article
(This article belongs to the Special Issue Applications of Natural and Synthetic Coatings in Environmental, Geological, Geophysical, and Energy Engineering: The State of the Art)
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18 pages, 5094 KiB  
Article
A Note on the Influence of Smectite Coating on the Coefficient of Restitution of Natural Sand Particles Impacting Granitic Blocks
by Lina Luo, Jing Ren, Sathwik S. Kasyap and Kostas Senetakis
Coatings 2021, 11(8), 996; https://doi.org/10.3390/coatings11080996 - 20 Aug 2021
Cited by 6 | Viewed by 2384
Abstract
The study of the collision behavior of solid objects has received a significant amount of research in various fields such as industrial applications of powders and grains, impacts of proppants and between proppant and rocks during hydraulic fracturing, and the study of debris [...] Read more.
The study of the collision behavior of solid objects has received a significant amount of research in various fields such as industrial applications of powders and grains, impacts of proppants and between proppant and rocks during hydraulic fracturing, and the study of debris flows and avalanches and the interactions of landslide materials with protective barriers. This problem has predominantly been studied through the coefficient of restitution (COR), which is computed from the dropping and rebound paths of particles; its value corresponds to 1 for perfectly elastic impacts and 0 for perfectly plastic impacts (i.e., at the collision there is no rebound of the particle). Often, the colliding particles (or particle–block systems) are not perfectly clean, and there is debris (or dust) on their surfaces, forming a coating, which is a highly possible scenario in the debris flows of natural particles and fragments; however, the topic of the influence of natural coatings on the surfaces of particles on the collision behavior of particle–block systems has been largely overlooked. Thus, the present study attempts to provide preliminary results with respect to the influence of natural coating on the surfaces of sand grains in the COR values of grain–block systems using a stiff granitic block as an analogue wall. Montmorillonite powder, which belongs to the smectite clay group, was used and a sample preparation method was standardized to provide a specific amount of clay coating on the surfaces of the sand grains. The results from the study showed a significant influence of the smectite coating in the COR values of the grain–block systems, which was predominantly attributed to the dissipation of energy at the collision moment because of the compression of the soft coating of microparticles. Additionally, the method of analysis for calculating the COR values based on one and two high-speed cameras was explored, as the impacts of natural grains involve deviations from the vertical, which influences the rebound paths. Thus, a sensitivity analysis was performed investigating the differences in the COR values in two-dimensional and three-dimensional analysis of the impact tests. Full article
(This article belongs to the Special Issue Applications of Natural and Synthetic Coatings in Environmental, Geological, Geophysical, and Energy Engineering: The State of the Art)
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21 pages, 6766 KiB  
Article
Effect of Lime Stabilization and Partial Clinoptilolite Zeolite Replacement on the Behavior of a Silt-Sized Low-Plasticity Soil Subjected to Freezing–Thawing Cycles
by Sarah Shirmohammadi, Saeed Ghaffarpour Jahromi, Meghdad Payan and Kostas Senetakis
Coatings 2021, 11(8), 994; https://doi.org/10.3390/coatings11080994 - 20 Aug 2021
Cited by 31 | Viewed by 3197
Abstract
Soil stabilization, through either physical or chemical techniques of coating-cementation development, is a commonly adopted practice in geotechnical and transportation engineering projects used to strengthen soils and mitigate negative geo-environmental impacts. This can be particularly important in enhancing the mechanical properties of soils [...] Read more.
Soil stabilization, through either physical or chemical techniques of coating-cementation development, is a commonly adopted practice in geotechnical and transportation engineering projects used to strengthen soils and mitigate negative geo-environmental impacts. This can be particularly important in enhancing the mechanical properties of soils which are prone to degradation of their response because of freezing and thawing actions. It was attempted in this research study to examine the effect of lime–zeolite stabilization on the behavior of a silt-sized natural soil of low plasticity, by performing standard compaction tests as well as unconfined compressive experiments evaluating the strength of the composite samples. The natural soil mixed with various contents of lime and zeolite partial replacement was subjected to consecutive freezing and thawing cycles. The results from the study showed significant improvement of the mechanical performance of the treated soil when mixed with lime partially replaced with zeolite in terms of strength and durability and, based on scanning electron microscopic images, additional insights were attempted to be obtained on the microstructure of the specimens subjected to temperature changes. Full article
(This article belongs to the Special Issue Applications of Natural and Synthetic Coatings in Environmental, Geological, Geophysical, and Energy Engineering: The State of the Art)
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