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Polymers
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Multifunctional Environmentally Friendly Polymers
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Multifunctional Environmentally Friendly Polymers

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

Deadline for manuscript submissions: closed (25 June 2023) | Viewed by 5637

Special Issue Editors

Prof. Dr. Xiaodong Ji

E-Mail Website
Guest Editor
Department of Civil Engineering, Beijing Forestry University, Beijing 100083, China
Interests: engineering materials; bamboo structures; slope ecological restoration; timber structures; fiber-reinforced polymers
Dr. Xinmiao Meng

E-Mail Website
Guest Editor
Department of Civil Engineering, Beijing Forestry University, Beijing 100083, China
Interests: wood structures; bamboo structures; composite structures; FRP strengthening structures; LCA

Special Issue Information

Dear Colleagues,

Multifunctional environmentally friendly polymers can help to maintain a balance between carbon emissions and absorption to achieve neutralization. In contrast to the most commonly building materials, including cement and steel, the use of which accounts for 15% of the world’s total annual carbon emissions, utilizing multifunctional environmentally friendly polymers in production can significantly ease eco-environmental pressure. In this regard, multifunctional environmentally friendly polymers in buildings and infrastructure are needed to neutralize carbon and preserve ecosystems.

This Special Issue aims to present recent advances and emerging civil and infrastructure materials for the development of multifunctional environmentally friendly polymers. Research from the tests, theoretical and numerical analyses, and engineering designs for the application of innovative materials are welcome. Manuscripts are expected to reflect original research and technological advances on topics that include, but are not limited to:

  • Timber structures;
  • Bamboo structures;
  • Carbon-neutral steel, concrete, and aluminium;
  • Ecological fiber and matrix;
  • Renewable materials.

Prof. Dr. Xiaodong Ji
Dr. Xinmiao Meng
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

  • carbon-neutral materials
  • life cycle assessment
  • environmental product declarations
  • sustainability

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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

16 pages, 5161 KiB  
Article
Numerical Simulation of the Shear Capacity of a GFRP-Strengthened Natural Bamboo-Bolt Composite Joint
by Quanfeng Li, Xiaodong Ji, Zihao Jin, Jin Xu, Shihan Yang and Shumin Lv
Polymers 2022, 14(15), 3024; https://doi.org/10.3390/polym14153024 - 26 Jul 2022
Cited by 2 | Viewed by 1692
Abstract
As an ecological green building material, natural bamboo has many advantages such as a light weight, high strength, and short growth cycle. Natural bamboo is widely used in landscape architecture and fabricated structures. However, in bamboo building structures, the most common bolted joints [...] Read more.
As an ecological green building material, natural bamboo has many advantages such as a light weight, high strength, and short growth cycle. Natural bamboo is widely used in landscape architecture and fabricated structures. However, in bamboo building structures, the most common bolted joints often appear cleaved along the grain. In this paper, glass fiber-reinforced polymer (GFRP) is designed to wrap and improve the shear capacity of natural bamboo-bolt composite joints. According to the corresponding material parameters, the finite element model of composite joints is established, and the key influencing variables of the bearing capacity, namely the bolt diameter, bamboo tube outer diameter, and screw end distance, are analyzed. In addition, according to the European analytical yield model of bolted connections, the analytical calculation method of the bearing capacity is proposed and compared with the experimental and simulated values. The results showed that the numerical model and the modified analytical model can suitably describe the bearing capacity of composite joints, and a higher bolt diameter, along with the bamboo outer diameter, will lead to a higher ultimate load of the composite joints. Moreover, the bearing capacity of composite joints has no obvious relationship with the end spacing. Full article
(This article belongs to the Special Issue Multifunctional Environmentally Friendly Polymers)
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13 pages, 3021 KiB  
Article
Study on Self-Leveling of Foamed Concrete for Long-Distance-Tunnel-Gas-Pipeline Backfill
by Chunbao Li, Xiaotian Li, Shen Li, Di Guan, Chang Xiao, Yun Lei, Valentina Y. Soloveva, Hojiboev Dalerjon, Pengju Qin and Xiaohui Liu
Polymers 2022, 14(14), 2886; https://doi.org/10.3390/polym14142886 - 16 Jul 2022
Cited by 2 | Viewed by 1582
Abstract
In the foamed-concrete-backfilled-gas-pipeline project, the fluidity of foamed concrete has a great impact on the construction quality. This research studied the fluidity of foamed concrete through laboratory tests. By changing the water–cement ratio, admixtures, additives, foaming-agent content and other test parameters, foamed concrete [...] Read more.
In the foamed-concrete-backfilled-gas-pipeline project, the fluidity of foamed concrete has a great impact on the construction quality. This research studied the fluidity of foamed concrete through laboratory tests. By changing the water–cement ratio, admixtures, additives, foaming-agent content and other test parameters, foamed concrete with different fluidities was prepared, and the effects of the above parameters on the fluidity of foamed concrete were analyzed. At the same time, the construction equipment was improved in the three steps of transportation, production and pouring. The results show the factors affecting the fluidity of foamed concrete are, in order of importance, foaming-agent content > water–cement ratio > water-reducer content > admixture content. According to the orthogonal-test results, the control scheme meeting the fluidity requirements of the actual engineering project had gains as follows: the water–cement-ratio range from 0.5 to 0.6, the amount of admixture from 35% to 40%, the water-reducer content at 1% and the foaming-agent content from 3% to 3.5% so as to ensure the automatic leveling of foamed concrete under the best flow state. Full article
(This article belongs to the Special Issue Multifunctional Environmentally Friendly Polymers)
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14 pages, 3424 KiB  
Article
Effect of Maintenance and Water–Cement Ratio on Foamed Concrete Shrinkage Cracking
by Chunbao Li, Xiaotian Li, Shen Li, Di Guan, Chang Xiao, Yanyan Xu, Valentina Y. Soloveva, Hojiboev Dalerjon, Pengju Qin and Xiaohui Liu
Polymers 2022, 14(13), 2703; https://doi.org/10.3390/polym14132703 - 1 Jul 2022
Cited by 6 | Viewed by 1937
Abstract
This is a study on how to reduce shrinkage and improve crack resistance of foamed concrete. By selecting different curing temperatures and humidity, six different curing conditions were analyzed. The shrinkage deformation and maximum crack width of foamed concrete blocks with water–cement ratios [...] Read more.
This is a study on how to reduce shrinkage and improve crack resistance of foamed concrete. By selecting different curing temperatures and humidity, six different curing conditions were analyzed. The shrinkage deformation and maximum crack width of foamed concrete blocks with water–cement ratios of 0.4 and 0.5, under six curing conditions, were measured by a comparator and optical microscope, and the cracking time was recorded. The effects of curing temperature, humidity and water–cement ratio on the shrinkage and crack resistance of the foamed concrete were analyzed by comparing the experimental results of each group. We studied the primary and secondary order of the three factors affecting the drying shrinkage of foamed concrete. The results show that: temperature is the primary factor that changes the drying shrinkage performance of foamed concrete, followed by the water–cement ratio, and finally humidity. The interaction of these three factors is not obvious. The shrinkage of foamed concrete increases with the increase in temperature; increasing the humidity of curing can control the water loss rate of foamed concrete and reduce shrinkage. Lower humidity and higher temperature will make cracks appear earlier; with an increase in the water–cement ratio, the initial cracking time is shortened and the cracking property of foamed concrete is improved. Full article
(This article belongs to the Special Issue Multifunctional Environmentally Friendly Polymers)
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