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Polymers
Special Issues
Application and Development of Polymers in Geotechnical Engineering
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Application and Development of Polymers in Geotechnical Engineering

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (31 May 2024) | Viewed by 3188

Special Issue Editors

Dr. Junran Zhang

E-Mail Website
Guest Editor
Henan Province Key Laboratory of Geomechanics and Structural Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
Interests: engineering properties of unsaturated soils and biopolymer-treated soils
Dr. Shaokai Wang

E-Mail Website
Co-Guest Editor
Henan Province Key Laboratory of Geomechanics and Structural Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
Interests: loess; soil stabilization; water retention properties; durability

Special Issue Information

Dear Colleagues, 

Polymers and biopolymers are promising, new, and environmentally friendly ground-improvement materials for geotechnical and construction engineering practices. Those methods ensure the effectiveness of the project while meeting the environmental requirements, with a certain degree of site suitability and economic feasibility. Common biopolymers used in geotechnical engineering research include agar gum, guar gum, gellan gum, xanthan gum, dextran, lignin, chitosan, and so on. The engineering properties that biopolymers can contribute to soil stabilization include shear strength improvement, water retention capacity promotion, permeability reduction, swell and shrinkage inhibition, and durability and stability enhancement. 

This Special Issue aims to highlight research progress related to polymers and biopolymers, especially in geotechnical and construction engineering practice, including but not limited to the following aspects: soil stabilization, unsaturated soil, expansive soil, biopolymer-treated soils, granite residual soil, sandy cobble soil, calcareous sand, wind erosion control, soil grouting, soil remediation, and vegetation growth improvement in drylands, test methods of environmental rock and soil mechanics, new energy development and utilization, and construction and monitoring technology of geotechnical engineering.

Dr. Junran Zhang
Dr. Shaokai Wang
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. Polymers 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 2700 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

  • polymers
  • biopolymers
  • soil stabilization
  • unsaturated soil
  • expansive soil
  • biopolymer-treated soils
  • Sandy cobble soil
  • drying and wetting cycle
  • shear strength
  • water retention characteristics
  • permeability
  • durability
  • calcareous sand
  • wind erosion control
  • foam

Published Papers (3 papers)

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Research

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26 pages, 36425 KiB  
Article
Study on Bonding Characteristics of Polymer Grouted Concrete-Soil Interface
by Lina Wang, Xiaodong Yang, Yueliang Diao and Chengchao Guo
Polymers 2024, 16(15), 2207; https://doi.org/10.3390/polym16152207 - 2 Aug 2024
Abstract
The issue of interfacial shear damage has been a significant challenge in the field of geotechnical engineering, particularly in the context of diaphragm walls and surrounding soils. Polymer grouting is a more commonly used repair and reinforcement method but its application to interface [...] Read more.
The issue of interfacial shear damage has been a significant challenge in the field of geotechnical engineering, particularly in the context of diaphragm walls and surrounding soils. Polymer grouting is a more commonly used repair and reinforcement method but its application to interface repair and reinforcement in the field of geotechnical engineering is still relatively rare. Consequently, this paper presents a new polymer grouting material for use in grouting reinforcement at the interface between concrete and soils. The bonding characteristics and shear damage mode of the interface after grouting were investigated by the direct shear test, and the whole process of interface shear damage was investigated by digital image correlation (DIC) technology. Finally, the reinforcement mechanism was analyzed by microscopic analysis. The results demonstrate that the permeable polymer is capable of effectively filling the pores of soil particles and penetrating into the concrete-soil interface. Through a chemical reaction with water in the soil, the polymer cements the soil particles together, forming chemical adhesion at the interface and thereby achieving the desired reinforcement and repair effect. In the shear process, as the normal stress increased, the horizontal displacement and horizontal compressive strain at the distal end of the loading end decreased, while the maximum vertical displacement and maximum vertical strain of the cured soil also decreased. The results of scanning electron microscopy (SEM) demonstrated that the four groups of test polymers exhibited a reduction in soil porosity of 53.47%, 58.79%, 52.71%, and 54.12%, respectively. Additionally, the form of concrete-soil interfacial bonding was observed in the concrete-cohesive layer-cured soil mode. The findings of this study provide a foundation for further research on diaphragm wall repair and reinforcement. Full article
(This article belongs to the Special Issue Application and Development of Polymers in Geotechnical Engineering)
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18 pages, 8576 KiB  
Article
Research on Resilient Modulus Prediction Model and Equivalence Analysis for Polymer Reinforced Subgrade Soil under Dry–Wet Cycle
by Yingcheng Luan, Wei Lu and Kun Fu
Polymers 2023, 15(20), 4187; https://doi.org/10.3390/polym15204187 - 23 Oct 2023
Cited by 1 | Viewed by 996
Abstract
The subgrade soil of asphalt pavement is significantly susceptible to changes in moisture content, and therefore many projects introduce polymer-based reinforcement to ensure soil performance. This paper aims to incorporate a variable representing the dry–wet cycle into the prediction model of resilient modulus [...] Read more.
The subgrade soil of asphalt pavement is significantly susceptible to changes in moisture content, and therefore many projects introduce polymer-based reinforcement to ensure soil performance. This paper aims to incorporate a variable representing the dry–wet cycle into the prediction model of resilient modulus of polymer reinforced soil. The polymer adopted is a self-developed subgrade soil solidification material consisting of sodium dodecyl sulfate and polyvinyl oxide. The current resilient modulus prediction model is improved, notably involving the effects of the dry–wet cycle. Combined with finite element method (FEM) analysis, the actual stress state of pavement and the coupling effect of dry–wet cycle and vehicle load on the resilient modulus are studied. The deterioration in resilient modulus with the variation in seasonal climate and load response is also investigated. Results show that the deviator stress is negatively correlated with the resilient modulus while the bulk stress has a linearly positive relation. The decreasing rate at low deviator stress is larger than that at the high level. Moreover, the dry–wet cycle can reduce the resilient modulus and the reducing amplitude is the largest at the first dry–wet cycle. FEM analysis shows that the middle position of the subgrade slope has the largest initial resilient modulus with decreasing amplitude in the first year of dry–wet cycles, while the upper position shows a smaller change. The variation in resilient modulus is closely related to the changes in cumulative volumetric water content. Considering that different positions of subgrade bear the external vehicle load, the equivalent resilient modulus is more realistic for guiding the subgrade design. Full article
(This article belongs to the Special Issue Application and Development of Polymers in Geotechnical Engineering)
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Review

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31 pages, 8250 KiB  
Review
Comprehensive Review of Geotechnical Engineering Properties of Recycled Polyethylene Terephthalate Fibers and Strips for Soil Stabilization
by Bisma Khalid and Fahad Alshawmar
Polymers 2024, 16(13), 1764; https://doi.org/10.3390/polym16131764 - 21 Jun 2024
Viewed by 1180
Abstract
The waste management of plastic has become a pressing environmental issue, with polyethylene terephthalate (PET) being one of the major contributors. To address this challenge, the utilization of recycled PET fibers and strips in geotechnical engineering applications for soil stabilization has gained considerable [...] Read more.
The waste management of plastic has become a pressing environmental issue, with polyethylene terephthalate (PET) being one of the major contributors. To address this challenge, the utilization of recycled PET fibers and strips in geotechnical engineering applications for soil stabilization has gained considerable attention. This review aims to provide a comprehensive study of the geotechnical engineering properties of recycled-PET-reinforced soils. The review examines various factors influencing the performance of PET-reinforced soils, including PET percent content, fiber length, and aspect ratio. It evaluates the mechanical properties, like shear strength, compressibility, bearing capacity, hydraulic behavior, and durability of recycled-PET-reinforced soils. The findings reveal PET reinforcement enhances shear strength, reduces settlement, and increases the bearing capacity and stability of the soil. However, it is observed that the incorporation of recycled PET fibers and strips does not lead to a significant impact on the dry density of the soil. Finally, an environmental and cost comparison analysis of recycled PET fibers and strips was conducted. This review serves as a valuable resource for researchers, engineers, and practitioners involved in the field, offering insights into the geotechnical properties of PET-reinforced soils and outlining future research directions to maximize their effectiveness and sustainability. Full article
(This article belongs to the Special Issue Application and Development of Polymers in Geotechnical Engineering)
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