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Geopolymers and Fiber-Reinforced Concrete Composites (Second Edition)

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

Deadline for manuscript submissions: 20 September 2025 | Viewed by 1151

Special Issue Editors


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Guest Editor
Department of Civil Engineering, McMaster University, Hamilton, ON, Canada
Interests: concrete structures; sustainable materials; high-performance composites; green construction; strengthening and rehabilitation; artificial intelligence
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Civil and Environmental Engineering, The University of Western Ontario, London, ON, Canada
Interests: concrete structures; seismic analysis; materials; artificial intelligence
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Civil, Architectural. and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, USA
Interests: concrete structure; sustainable materials; geopolymer concrete; 3D-printing concrete; machine learning
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Special Issue “Geopolymers and Fiber-Reinforced Concrete Composites” will address advances in the characterization, processing, scaling-up, testing, and commercialization of various types of geopolymers and alkali-activated materials, as well as fiber-reinforced concrete composites. In this Special Issue, we welcome research articles, case studies, and reviews that aim to enrich the available knowledge regarding such high-performance construction materials and highlight the latest findings at both the material and structural levels. Topics of interest include, but are not limited to, the following:

  • Applications of steel, carbon, and polymeric fibers in concrete;
  • Fiber-reinforced concrete and high-performance cement-based composites;
  • Fiber hybridization;
  • Fire resistance;
  • Fresh, mechanical, and durability properties;
  • Impact strength and bond, shear, flexural, cyclic, and cracking behaviors;
  • Geopolymers and alkali-activated materials (i.e., concrete, mortar, adhesives) for different market applications;
  • Natural and recycled fibers;
  • Numerical modeling;
  • Repair applications;
  • Proposing new classes of geopolymers and fiber-reinforced concrete;
  • Small- and large-scale testing.

Dr. Mohamed K. Ismail
Dr. Ahmed A. Elansary
Dr. Eslam Gomaa
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. 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

  • alkali-activated materials
  • concrete
  • fibers
  • geopolymers
  • green construction materials
  • strength and durability
  • structural capabilities
  • sustainability

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Published Papers (1 paper)

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Research

13 pages, 3233 KiB  
Article
The Influence of Alkali-Resistant MiniBars™ on the Mechanical Properties of Geopolymer Composites
by Gabriel Furtos, Codruta Sarosi, Marioara Moldovan, Kinga Korniejenko, Michał Łach, Viorel Ungureanu, Leonard Miller and Iveta Nováková
Materials 2025, 18(4), 778; https://doi.org/10.3390/ma18040778 - 10 Feb 2025
Viewed by 705
Abstract
Geopolymer concrete reinforced with MiniBars™ could be an eco-friendly, innovative, durable, high-strength material substitute for common Portland cement in buildings. AR glass fiber MiniBars™ composites (AR MiniBars™) (ReforceTech AS, Royken, Norway) 60 mm in length were utilized to strengthen the geopolymer matrix for [...] Read more.
Geopolymer concrete reinforced with MiniBars™ could be an eco-friendly, innovative, durable, high-strength material substitute for common Portland cement in buildings. AR glass fiber MiniBars™ composites (AR MiniBars™) (ReforceTech AS, Royken, Norway) 60 mm in length were utilized to strengthen the geopolymer matrix for the fabrication of unidirectional geopolymer composites reinforced by AR MiniBars™ (AR MiniBars™ FRBCs). New AR MiniBars™ FRBCs were fabricated by adding different amounts of AR MiniBars™ (0, 12.5, 25, 50, 75 vol.%) into the fly ash geopolymer paste. Geopolymers were obtained by combining fly ash powder with Na2SiO3/NaOH in a ratio of 2.5:1, which served as an alkaline activator. AR MiniBars™ FRBCs were cured for 48 h at 70 °C and tested for different mechanical properties. Fly ash, AR MiniBars™, and AR MiniBars™ FRBC were evaluated by optical microscopy and SEM. The addition of AR MiniBars™ increased the mechanical properties of AR MiniBars™ FRBCs. The mechanical properties of AR MiniBars™ FRBCs were heightened compared to the geopolymer without AR MiniBars™; the flexural strength was 18.80–30.71 times greater, the flexural modulus 4.07–5.25 times greater, the tensile strength 3.49–8.27 times greater, the force load at upper yield tensile strength 3.6–7.72 times greater, and the compressive strength for cubic samples 2.75–3.61 times greater. The fractured surfaces and sections of AR MiniBars™ FRBCs were inspected by SEM and optical microscopy analyses, and even though there was no chemical adhesion, we achieved a good micromechanical adhesion of the geopolymer to AR MiniBars™. These results obtained encouraged us to propose AR MiniBars™ FRBCs for application in construction. Full article
(This article belongs to the Special Issue Geopolymers and Fiber-Reinforced Concrete Composites (Second Edition))
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