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Cited by 51Concrete and Cement Materials ResearchZeolite Catalysis and SynthesisNMR spectroscopy and applications

Revealing the Influence of Microparticles on Geopolymers’ Synthesis and Porosity

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Burduhos Nergis, Dumitru Doru, Vizureanu, Petrica, Ardelean, Ioan, Sandu, Andrei Victor, Corbu, Ofelia Cornelia, Matei, Ecaterina·2020·Materials
DOI 10.3390/ma13143211PMC PMC7412043
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Abstract

Geopolymers are zeolites like structures based on hydrated aluminosilicates units of SiO4 and AlO4. These units, known as poly(sialate), poly(sialate)-siloxo or poly(sialate)-disiloxo are chemically balanced by the group I cations of K+, Li+, or Na+. Simultaneously, the chemical reaction of formation, known as geopolymerization, governs the orientation of the unit, generating mesoporous structures. Multiple methods can be used for pore structure and porosity characterization. Among them, nuclear magnetic resonance (NMR) relaxometry allows the detection of the porous structure in a completely nonperturbative manner. NMR relaxometry may be used to monitor the relaxation of protons belonging to the liquid molecules confined inside the porous structure and, thus, to get access to the pore size distribution. This monitoring can take place even during the polymerization process. The present study implements transverse relaxation measurements to monitor the influence introduced by the curing time on the residual liquid phase of geopolymers prepared with two different types of reinforcing particles. According to our results, the obtained geopolymers contain three types of pores formed by the arrangement of the OH− and Si groups (Si-OH), Si-O-Si groups, Si-O-Al groups, and Si-O rings. After 48 days, the samples cured for 8 h show a high percentage of all three types of pores, however, by increasing the curing time and the percentage of reinforcing particle, the percent of pores decrease, especially, the gel pores.

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  • 10 M NaOH solution is suitable for Class F and Class C fly-ash-based geopolymer.

    “The researcher found that 10 M NaOH solution is suitable for Class F and Class C fly-ash-based geopolymer, respectively [51,74,101,107,108].”

    From Potential of Soil Stabilization Using Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash via Geopolymerization Method: A Review (2022) · cites this paper as [108]

    Materials and Methods §2.1 says the study used 10 M NaOH together with sodium silicate to activate its coal ash; Results and Discussion identifies that ash as Class F. The paper does not establish suitability for Class C fly ash or for 10 M NaOH used alone. (LLM, conf=0.88)

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Authors
Burduhos Nergis, D. D., Vizureanu, P., Ardelean, I., Sandu, A. V., Corbu, O. C., & Matei, E.
Affiliations
  • Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iași, 700050 Iasi, Romania
  • Technical University of Cluj-Napoca (RO)
  • Gheorghe Asachi Technical University of Iași (RO)
  • Universitatea Națională de Știință și Tehnologie Politehnica București (RO)
Corresponding author
Sandu, Andrei Victor
ORCID
Venue
Materials
Publisher
MDPI AG
Published
2020-07-18
Volume
13
Issue
14
Pages
3211
ISSN
1996-1944 (ISSN-L)
DOI
10.3390/ma13143211
PMC
PMC7412043
OpenAlex
W3042840760
Cited by
51
References
1
Citations by year
2026: 4 · 2025: 6 · 2024: 6 · 2023: 3 · 2022: 15 · 2021: 16 · 2020: 1
FWCI
5.11
Type
journal article
Language
en
Open access
Licence
Locations
  • Materials (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Physical Sciences › Engineering › Civil and Structural Engineering › Concrete and Cement Materials Research
  • Physical Sciences › Chemistry › Inorganic Chemistry › Zeolite Catalysis and Synthesis
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › NMR spectroscopy and applications
Keywords
geopolymer, geopolymerization, microparticles, pore structure, porosity, NMR relaxometry, T2 relaxation, pore size distribution, curing time, gel pores, reinforcing particles, hydrated aluminosilicate

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