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Fiber Reinforced Polymers for Structural Strengthening II
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Fiber Reinforced Polymers for Structural Strengthening II

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Polymeric Materials".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 4007

Special Issue Editor

Dr. Jose Sena-Cruz

E-Mail Website
Guest Editor
Department of Civil Engineering, University of Minho, Guimarães, Portual
Interests: FRP materials and structures; durability and long-term behavior; testing; finite element analysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The use fibre-polymer based composites, usually named as fiber reinforced polymers (FRP), in the construction sector mostly started in 1970–1980s, with several applications in all-composite and hybrid structures, internal reinforcement of new structures, and internal/external strengthening of existing structures. Among different sectors, such aerospace, automotive, wind energy, marine, and sporting goods, construction continues to be the second largest market for composite materials. This achievement is intrinsically related to the research developed by different institutions and researchers worldwide. Despite that, innovative structural solutions and unprecedented insights on the existing subjects are continually proposed for the composites construction sector. Given the great success of the Special Issue "Fiber Reinforced Polymers for Structural Strengthening", a second special issue has been released in these subjects.

Dr. Jose Sena-Cruz
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. Materials 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 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

  • FRP materials and structures
  • structural applications
  • innovative solutions
  • disruptive ideas/advanced contributions on the existing knowledge
  • testing
  • finite element analysis

Published Papers (2 papers)

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Research

26 pages, 9476 KiB  
Article
Coupled Effect of Polypropylene Fibers and Slag on the Impact Resistance and Mechanical Properties of Concrete
by Abdul Basit Ali, Muhammad Burhan Sharif, Muhammad Irfan-ul-Hassan, Yasir Iqbal, Usman Akmal, Hisham Alabduljabbar and Ahmed Farouk Deifalla
Materials 2022, 15(16), 5654; https://doi.org/10.3390/ma15165654 - 17 Aug 2022
Cited by 3 | Viewed by 1956
Abstract
The disposal of steel slag leads to the occupation of large land areas, along with many environmental consequences, due to the release of poisonous substances into the water and soil. The use of steel slag in concrete as a sand-replacement material can assist [...] Read more.
The disposal of steel slag leads to the occupation of large land areas, along with many environmental consequences, due to the release of poisonous substances into the water and soil. The use of steel slag in concrete as a sand-replacement material can assist in reducing its impacts on the environment and can be an alternative source of fine aggregates. This is the very first paper that seeks to experimentally investigate the cumulative effect of steel slag and polypropylene fibers, particularly on the impact resistance of concrete. Various concrete mixes were devised by substituting natural sand with steel slag at volumetric replacement ratios of 0%, 10%, 20%, 30%, and 40%, with and without fibers. Polypropylene fibers of 12 mm length were introduced into the steel slag concrete at 0%, 0.5%, and 1.0% by weight of cement as a reinforcing material. Performance evaluation of each mix through extensive experimental testing indicated that the use of steel slag as partial substitution of natural sand, up to a certain optimum replacement level of 30%, considerably improved the compressive strength, flexural strength, and tensile strength of the concrete by 20.4%, 23.8%, and 17.0%, respectively. Furthermore, the addition of polypropylene fibers to the steel slag concrete played a beneficial role in the improvement of strength characteristics, particularly the flexural strength and final drop weight impact energy, which had a maximum rise of 48.1% and 164%, correspondingly. Moreover, integral structure and analytical analyses have also been performed in this study to validate the experimental findings. The results obtained encourage the use of fiber-reinforced steel slag concrete (FRSLC) as a potential impact-resistant material considering the environmental advantages, with the suggested substitution, of an addition ratio of 30% and 1.0% for steel slag and polypropylene fibers, respectively. Full article
(This article belongs to the Special Issue Fiber Reinforced Polymers for Structural Strengthening II)
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25 pages, 17726 KiB  
Article
Flexural Creep Response of Hybrid GFRP–FRC Sandwich Panels
by Tiago Silva, Luís Correia, Mozhdeh Dehshirizadeh and José Sena-Cruz
Materials 2022, 15(7), 2536; https://doi.org/10.3390/ma15072536 - 30 Mar 2022
Cited by 3 | Viewed by 1736
Abstract
This work was developed within the scope of the research project “Easyfloor—Development of composite sandwich panels for building floor rehabilitation”, which aims at developing an innovative hybrid sandwich panel as an alternative construction system to conventional floor solutions, mainly for building rehabilitation. The [...] Read more.
This work was developed within the scope of the research project “Easyfloor—Development of composite sandwich panels for building floor rehabilitation”, which aims at developing an innovative hybrid sandwich panel as an alternative construction system to conventional floor solutions, mainly for building rehabilitation. The developed hybrid sandwich panel is composed of a top face layer of steel-fibre-reinforced self-compacting concrete (FRC), a core of polyurethane (PUR) closed-cell foam, a bottom face sheet, and lateral webs of glass-fibre-reinforced polymer (GFRP). Full-scale experimental tests on the developed sandwich panels were carried out to characterize their short- and long-term (creep) flexural behaviour. The present work includes a detailed description of the developed panels and the experimental programme carried out and presents and discusses the relevant results. The experimental results showed an almost linear behaviour up to failure. The creep tests were carried out for a period of 180 days, using a creep load equal to 20% of its ultimate loading capacity. An average creep coefficient of 0.27 was obtained for this period. The composed creep model used to simulate the sandwich panel’s creep deflections by considering the individual viscoelastic contributions was able to predict the observed structural response with good accuracy. Full article
(This article belongs to the Special Issue Fiber Reinforced Polymers for Structural Strengthening II)
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