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Polymers
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Polymer Concrete and Composites II
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Polymer Concrete and Composites II

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

Deadline for manuscript submissions: 15 May 2024 | Viewed by 6643

Special Issue Editor

Dr. Wahid Ferdous

E-Mail Website
Guest Editor
Centre for Future Materials (CFM), University of Southern Queensland, Toowoomba, QLD 4350, Australia
Interests: landfill waste utilisation; short fibres; fibre composites; material characterisation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Following the success of the Special Issue of Polymers, “Polymer Concrete and Composites”, we are delighted to reopen this Special Issue, now entitled “Polymer Concrete and Composites II”. 

Landfill waste, such as fly ash and end-of-life car tyres, are the biggest waste problems around the world. Fly ash is responsible for water contamination, toxic dust emissions, pipeline spills and poisoning aquatic life, while waste tyres create favourable environments for fire hazards and are a breeding ground for mosquitoes. They occupy a significant land area, while their disposal costs are extremely high. One promising way of managing fly ash and end-of-life tyres is by converting them into construction materials suitable for civil engineering applications. 

This Special Issue is concerned with the utilisation of such landfill waste in resin-based polymer concrete and composites. Utilising advanced engineering to develop new technologies from these wastes may produce cost-effective and eco-friendly construction materials. Topics may include their mechanical, thermal, microstructural and durability properties and modelling. This Issue also accepts state-of-the-art reviews on different resin systems by highlighting the range of applications for polymeric materials.

Dr. Wahid Ferdous
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. 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

  • fiber-reinforced polymer composite
  • resin-based polymer concrete
  • landfill wastes in polymer composites
  • finite element modeling
  • application of polymer composites
 

Related Special Issue

Published Papers (3 papers)

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Research

20 pages, 19051 KiB  
Article
Experimental Study on the Mechanical Properties of Crumb Rubber Concrete after Elevated Temperature
by Yang Han, Zhishuan Lv, Yaqiang Bai, Guoqi Han and Dongqiao Li
Polymers 2023, 15(14), 3102; https://doi.org/10.3390/polym15143102 - 20 Jul 2023
Cited by 2 | Viewed by 1677
Abstract
To reduce the environmental damage caused by waste rubber, crumb rubber concrete (CRC) was prepared by replacing some fine aggregates with crumb rubber. The effects of elevated temperature as well as crumb rubber content on the mechanical properties of the prepared CRC were [...] Read more.
To reduce the environmental damage caused by waste rubber, crumb rubber concrete (CRC) was prepared by replacing some fine aggregates with crumb rubber. The effects of elevated temperature as well as crumb rubber content on the mechanical properties of the prepared CRC were studied. The crumb rubber contents were 0%, 10%, and 20%, while CRC was subjected to atmospheric temperatures (AT) of 300 °C, 500 °C, and 700 °C. The concrete without crumb rubber content was used as the control group at the atmospheric temperature. The mass loss, thermal conductivity characteristics, compressive strength, splitting tensile strength, axial compressive strength, elastic modulus, and stress-strain characteristics of CRC at elevated temperatures were studied. The experimental results show that: (1) With the increase in crumb rubber content and temperature, the cracks on the surface of the specimen gradually widen while the mass loss of the specimen increases. (2) With the increase in crumb rubber content and temperature, the cube compressive strength, splitting tensile strength, axial compressive strength, and elastic modulus of CRC decrease, yet the plastic failure characteristics of CRC are more obvious. (3) The influences of elevated temperature on strength and elastic modulus are as follows: splitting tensile strength > elastic modulus > axial compressive strength > cubic compressive strength. (4) With the increase in temperature, the stress-strain curve of the CRC tends to flatten, the peak stress decreases, and the corresponding peak strain significantly increases. With the increase in crumb rubber content, there is a great decrease in peak stress, yet the corresponding peak strain is basically the same. The use of CRC can be prioritized in applications that increase toughness rather than strength. Full article
(This article belongs to the Special Issue Polymer Concrete and Composites II)
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20 pages, 7567 KiB  
Article
Performance of Reinforced Concrete Beams Strengthened by Bidirectional Carbon-Fiber-Reinforced Polymers Based on Numerical Models
by Jae Sang Moon, Da Young Kim, Myeong Seop Ko and Changhyuk Kim
Polymers 2023, 15(4), 1012; https://doi.org/10.3390/polym15041012 - 17 Feb 2023
Cited by 1 | Viewed by 1747
Abstract
The use of carbon-fiber-reinforced polymers (CFRPs) for the repair and rehabilitation of reinforced concrete (RC) structures has been receiving a lot of attention. Specifically, the shear strengthening of RC members based on CFRP materials has been treated as an effective and efficient strengthening [...] Read more.
The use of carbon-fiber-reinforced polymers (CFRPs) for the repair and rehabilitation of reinforced concrete (RC) structures has been receiving a lot of attention. Specifically, the shear strengthening of RC members based on CFRP materials has been treated as an effective and efficient strengthening method. Previous research projects focused on the shear strengthening of RC members with unidirectional CFRP strips. Although the effectiveness of a bidirectional CFRP layout compared to a unidirectional CFRP layout was discussed in several studies, these studies only investigated the issue based on experiments. Morever, the parameters of the bidirectional CFRP layout were not clearly defined. This study investigates the performance of RC beams strengthened by bidirectional CFRP based on numerical models. A numerical model based on finite element analysis is designed. Using the numerical model, the parameters of the horizontal CFRP strips, such as the layouts of horizontal CFRP strips and the number of horizontal CFRP strips, are studied. The results show that the effect of horizontal CFRP strips is maximized if the strips are distributed along the depth. In contrast, the number of horizontal CFRP strips does not significantly affect the shear strength of RC members. Full article
(This article belongs to the Special Issue Polymer Concrete and Composites II)
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19 pages, 6516 KiB  
Article
Development and Characterization of a Sustainable Bio-Polymer Concrete with a Low Carbon Footprint
by Daniel Heras Murcia, Siham Al Shanti, Fatemeh Hamidi, Jessica Rimsza, Hongkyu Yoon, Budi Gunawan, Mohammed Abdellatef and Mahmoud Reda Taha
Polymers 2023, 15(3), 628; https://doi.org/10.3390/polym15030628 - 26 Jan 2023
Cited by 2 | Viewed by 2763
Abstract
Polymer concrete (PC) has been used to replace cement concrete when harsh service conditions exist. Polymers have a high carbon footprint when considering their life cycle analysis, and with increased climate change concerns and the need to reduce greenhouse gas emission, bio-based polymers [...] Read more.
Polymer concrete (PC) has been used to replace cement concrete when harsh service conditions exist. Polymers have a high carbon footprint when considering their life cycle analysis, and with increased climate change concerns and the need to reduce greenhouse gas emission, bio-based polymers could be used as a sustainable alternative binder to produce PC. This paper examines the development and characterization of a novel bio-polymer concrete (BPC) using bio-based polyurethane used as the binder in lieu of cement, modified with benzoic acid and carboxyl-functionalized multi-walled carbon nanotubes (MWCNTs). The mechanical performance, durability, microstructure, and chemical properties of BPC are investigated. Moreover, the effect of the addition of benzoic acid and MWCNTs on the properties of BPC is studied. The new BPC shows relatively low density, appreciable compressive strength between 20–30 MPa, good tensile strength of 4 MPa, and excellent durability resistance against aggressive environments. The new BPC has a low carbon footprint, 50% lower than ordinary Portland cement concrete, and can provide a sustainable concrete alternative in infrastructural applications. Full article
(This article belongs to the Special Issue Polymer Concrete and Composites II)
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