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Performance Optimization of FA-GGBS Geopolymer Based on Response Surface Methodology
Many scholars have focused on the workability and mechanical properties of fly ash (FA)- ground granulated blast furnace slag (GGBS) geopolymer. To enhance the compressive strength of geopolymer, zeolite powder was added in the present study. A series of experiments were carried out to investigate t...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10144192/ https://www.ncbi.nlm.nih.gov/pubmed/37112028 http://dx.doi.org/10.3390/polym15081881 |
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author | Wu, Dazhi Wang, Junyi Miao, Tong Chen, Keyu Zhang, Zilong |
author_facet | Wu, Dazhi Wang, Junyi Miao, Tong Chen, Keyu Zhang, Zilong |
author_sort | Wu, Dazhi |
collection | PubMed |
description | Many scholars have focused on the workability and mechanical properties of fly ash (FA)- ground granulated blast furnace slag (GGBS) geopolymer. To enhance the compressive strength of geopolymer, zeolite powder was added in the present study. A series of experiments were carried out to investigate the effect of using zeolite powder as an external admixture on the per-formance of FA-GGBS geopolymer, 17 sets of experiments were designed and tested to deter-mine the unconfined compressive strength based on the response surface methodology, and then, the optimal parameters were obtained via modeling of 3 factors (zeolite powder dosage, alkali exciter dosage, and alkali exciter modulus) and 2 levels of compressive strength (3 d and 28 d). The experimental results showed that the strength of the geopolymer was the highest when the three factors were 13.3%, 40.3%, and 1.2. Finally, a combination of scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and (29)Si nuclear magnetic resonance (NMR) analysis was used to conduct micromechanical analysis and explain the reaction mechanism from a microscopic perspective. The SEM and XRD analysis revealed that the microstructure of the geopolymer was the densest when the zeolite powder was doped at 13.3%, and the strength increased accordingly. The NMR and Fourier transform infrared spectroscopy analyses revealed that the absorption peak wave number band shifted toward the lower wave number band under the optimal ratio, and the silica–oxygen bond was replaced by an aluminum–oxygen bond, which generated more aluminosilicate structures. |
format | Online Article Text |
id | pubmed-10144192 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-101441922023-04-29 Performance Optimization of FA-GGBS Geopolymer Based on Response Surface Methodology Wu, Dazhi Wang, Junyi Miao, Tong Chen, Keyu Zhang, Zilong Polymers (Basel) Article Many scholars have focused on the workability and mechanical properties of fly ash (FA)- ground granulated blast furnace slag (GGBS) geopolymer. To enhance the compressive strength of geopolymer, zeolite powder was added in the present study. A series of experiments were carried out to investigate the effect of using zeolite powder as an external admixture on the per-formance of FA-GGBS geopolymer, 17 sets of experiments were designed and tested to deter-mine the unconfined compressive strength based on the response surface methodology, and then, the optimal parameters were obtained via modeling of 3 factors (zeolite powder dosage, alkali exciter dosage, and alkali exciter modulus) and 2 levels of compressive strength (3 d and 28 d). The experimental results showed that the strength of the geopolymer was the highest when the three factors were 13.3%, 40.3%, and 1.2. Finally, a combination of scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and (29)Si nuclear magnetic resonance (NMR) analysis was used to conduct micromechanical analysis and explain the reaction mechanism from a microscopic perspective. The SEM and XRD analysis revealed that the microstructure of the geopolymer was the densest when the zeolite powder was doped at 13.3%, and the strength increased accordingly. The NMR and Fourier transform infrared spectroscopy analyses revealed that the absorption peak wave number band shifted toward the lower wave number band under the optimal ratio, and the silica–oxygen bond was replaced by an aluminum–oxygen bond, which generated more aluminosilicate structures. MDPI 2023-04-14 /pmc/articles/PMC10144192/ /pubmed/37112028 http://dx.doi.org/10.3390/polym15081881 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wu, Dazhi Wang, Junyi Miao, Tong Chen, Keyu Zhang, Zilong Performance Optimization of FA-GGBS Geopolymer Based on Response Surface Methodology |
title | Performance Optimization of FA-GGBS Geopolymer Based on Response Surface Methodology |
title_full | Performance Optimization of FA-GGBS Geopolymer Based on Response Surface Methodology |
title_fullStr | Performance Optimization of FA-GGBS Geopolymer Based on Response Surface Methodology |
title_full_unstemmed | Performance Optimization of FA-GGBS Geopolymer Based on Response Surface Methodology |
title_short | Performance Optimization of FA-GGBS Geopolymer Based on Response Surface Methodology |
title_sort | performance optimization of fa-ggbs geopolymer based on response surface methodology |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10144192/ https://www.ncbi.nlm.nih.gov/pubmed/37112028 http://dx.doi.org/10.3390/polym15081881 |
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