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Research on Geopolymers: Synthesis Methods, Manufacturing Process, Properties and Applications

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

Deadline for manuscript submissions: 10 July 2024 | Viewed by 743

Special Issue Editor


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Guest Editor
Department of Civil Engineering, Faculty of Engineering and Architectural Science, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
Interests: sustainable construction materials; high performance concrete; self-consolidating concrete; geopolymer-based green zero cement concrete; multi-functional composites; smart structural systems/applications

Special Issue Information

Dear Colleagues,

Geopolymers are inorganic polymers that have received considerable attention in recent years for their potential applications in various fields such as construction, waste management and aerospace. Researchers have conducted studies on their synthesis methods, manufacturing processes and applications. Common synthesis methods include utilizing various raw materials such as fly ash, slag and metakaolin, and activating these materials with alkaline solutions. Manufacturing processes for geopolymers include techniques such as traditional casting and thermal curing, as well as alternative methods such as 3D printing and extrusion. Geopolymer-based materials play an important role in the construction industry, waste management and more.

Current research on geopolymers still faces issues such as material performance optimization, production performance optimization and application scope expansion. Researchers need to find more available raw materials and develop new raw materials, further optimize the material formula and preparation process, and improve the production process. To improve geopolymer performance, further research and development of applications is needed in other fields such as structural materials, underground storage, environmental protection, etc.

We invite you to submit high-quality research or review papers to this Special Issue, focusing on various aspects such as synthesis methods,  manufacturing process and mix design, waste optimization,  nano-material incorporation,  fresh-state–mechanical–durability properties, multi-functional characteristics (self-healing, self-sensing, 3D printing, etc.), applications (in construction, rehabilitation and monitoring of structures and other infrastructures) and life-cycle modeling.    

Prof. Dr. Khandaker Muhammed Anwar Hossain
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

  • geopolymers
  • inorganic polymer
  • construction
  • waste management
  • manufacturing processes
  • mechanical properties
  • durability
  • multi-functional characteristics
  • 3D printing
  • 3D printing
  • life-cycle modeling

Published Papers (1 paper)

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Research

20 pages, 4130 KiB  
Article
Compositions and Microstructures of Carbonated Geopolymers with Different Precursors
by Zhuguo Li and Ko Ikeda
Materials 2024, 17(7), 1491; https://doi.org/10.3390/ma17071491 - 25 Mar 2024
Viewed by 544
Abstract
It is thought that geopolymers are easy to carbonate, especially when they are cured in ambient temperatures. Matrix gel’s composition and microstructure, and new products of geopolymers (GPs) after carbonation were investigated in this study on the basis of XRD and SEM-EDS measurements [...] Read more.
It is thought that geopolymers are easy to carbonate, especially when they are cured in ambient temperatures. Matrix gel’s composition and microstructure, and new products of geopolymers (GPs) after carbonation were investigated in this study on the basis of XRD and SEM-EDS measurements and ternary diagram analysis, which were prepared from low-lime fly ash (FA) and ground granulated blast-furnace slag (GGBS) alone or a blend, as a precursor. The specimens were hardened in a 20 °C environment with alkali activator solution (S/N = 1.1 in mole), followed by storage under sealing or accelerated carbonation. XRD patterns show that carbonation products were nahcolite for the sole FA-based GP and calcite for the GPs using GGBS alone or as a blend. The SEM images of carbonated samples show that there were cube-shaped calcite and small calcite particles in the GGBS-based GP, but hail-like particles in the FA/GGBS blend-based GP. The hail-like particles were complexes of calcite and C-A-S-H gels determined by ternary diagram analysis, and were found to plug the top of the pores of the spongy C-A-S-H gels. We also confirmed that combined ternary diagram analysis of S-(C + M + N)-A and A-(C + M)-N are very effective in determining the gel type of a geopolymer, as well as the products and compositional changes after carbonation, in which oxide components of gels are determined by SEM-EDS. In the former diagram, C-A-S-H gels were plotted linearly along the (C + M + N)-albite (Ab) join, while N-A-S-H gels showed a scattered distribution. In the latter diagram, the plots for N-A-S-H and C-A-S-H gels are distributed in different zones. N = Na2O, C = CaO, M = MgO, A = Al2O3, S = SiO2, H = H2O. Full article
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